On 2 September 2014 17:26, Ola Liljedahl <[email protected]
<mailto:[email protected]>> wrote:
Signed-off-by: Ola Liljedahl <[email protected]
<mailto:[email protected]>>
---
(This document/code contribution attached is provided under the
terms of agreement LES-LTM-21309)
New timer API and corresponding SW implementation for linux-generic.
Read more about use cases and usage here:
https://docs.google.com/a/linaro.org/document/d/1bfY_J8ecLJPsFTmYftb0NVmGnB9qkEc_NpcJ87yfaD8/edit#
example/timer/odp_timer_test.c | 93 ++-
platform/linux-generic/Makefile.am | 1 +
platform/linux-generic/include/api/odp_timer.h | 478 ++++++++++--
.../linux-generic/include/odp_timer_internal.h | 71 +-
platform/linux-generic/odp_timer.c | 823
+++++++++++++--------
platform/linux-generic/priority_queue.c | 289 ++++++++
platform/linux-generic/priority_queue.h | 107 +++
test/api_test/odp_timer_ping.c | 58 +-
8 files changed, 1455 insertions(+), 465 deletions(-)
create mode 100644 platform/linux-generic/priority_queue.c
create mode 100644 platform/linux-generic/priority_queue.h
diff --git a/example/timer/odp_timer_test.c
b/example/timer/odp_timer_test.c
index bf1d7df..0b4fedf 100644
--- a/example/timer/odp_timer_test.c
+++ b/example/timer/odp_timer_test.c
@@ -35,7 +35,6 @@
typedef struct {
int core_count; /**< Core count*/
int resolution_us; /**< Timeout resolution in usec*/
- int min_us; /**< Minimum timeout in usec*/
int max_us; /**< Maximum timeout in usec*/
int period_us; /**< Timeout period in usec*/
int tmo_count; /**< Timeout count*/
@@ -45,18 +44,16 @@ typedef struct {
/** @private Barrier for test synchronisation */
static odp_barrier_t test_barrier;
-/** @private Timer handle*/
-static odp_timer_t test_timer;
+/** @private Timer pool handle*/
+static odp_timer_pool_t tp;
/** @private test timeout */
static void test_abs_timeouts(int thr, test_args_t *args)
{
- uint64_t tick;
- uint64_t period;
+ odp_timer_tick_t period;
uint64_t period_ns;
odp_queue_t queue;
- odp_buffer_t buf;
int num;
ODP_DBG(" [%i] test_timeouts\n", thr);
@@ -64,37 +61,51 @@ static void test_abs_timeouts(int thr,
test_args_t *args)
queue = odp_queue_lookup("timer_queue");
period_ns = args->period_us*USEC;
- period = odp_timer_ns_to_tick(test_timer, period_ns);
+ period = odp_timer_ns_to_tick(tp, period_ns);
ODP_DBG(" [%i] period %"PRIu64" ticks, %"PRIu64" ns\n", thr,
period, period_ns);
- tick = odp_timer_current_tick(test_timer);
+ ODP_DBG(" [%i] current tick %"PRIu64"\n", thr,
+ odp_timer_current_tick(tp));
- ODP_DBG(" [%i] current tick %"PRIu64"\n", thr, tick);
-
- tick += period;
-
- if (odp_timer_absolute_tmo(test_timer, tick, queue,
ODP_BUFFER_INVALID)
- == ODP_TIMER_TMO_INVALID){
- ODP_DBG("Timeout request failed\n");
+ odp_timer_t test_timer;
+ test_timer = odp_timer_alloc(tp, queue, NULL);
+ if (test_timer == ODP_TIMER_INVALID) {
+ ODP_ERR("Failed to allocate timer\n");
return;
}
+ odp_timer_set_rel(test_timer, period);
num = args->tmo_count;
while (1) {
- odp_timeout_t tmo;
-
- buf = odp_schedule_one(&queue, ODP_SCHED_WAIT);
+ /* Local variables because received timeouts may not
+ originate from timer we created above */
+ odp_timer_tmo_t tmo;
+ odp_timer_tick_t tick;
+ odp_timer_t hdl;
+
+ /* Get the next ready buffer/timeout */
+ tmo = odp_schedule_one(&queue, ODP_SCHED_WAIT);
+ switch (odp_timer_tmo_status(tmo)) {
+ case ODP_TMO_FRESH:
+ break;
+ case ODP_TMO_STALE:
+ ODP_DBG("[%i] Stale timeout received\n", thr);
+ break;
+ case ODP_TMO_ORPHAN:
+ ODP_DBG("[%i] Orphaned timeout received\n",
+ thr);
+ odp_buffer_free(tmo);
+ continue;
+ }
- tmo = odp_timeout_from_buffer(buf);
- tick = odp_timeout_tick(tmo);
+ tick = odp_timer_get_expiry(tmo);
+ hdl = odp_timer_get_handle(tmo);
ODP_DBG(" [%i] timeout, tick %"PRIu64"\n", thr,
tick);
- odp_buffer_free(buf);
-
num--;
if (num == 0)
@@ -102,10 +113,13 @@ static void test_abs_timeouts(int thr,
test_args_t *args)
tick += period;
- odp_timer_absolute_tmo(test_timer, tick,
- queue, ODP_BUFFER_INVALID);
+ if (hdl != ODP_TIMER_INVALID)
+ odp_timer_set_abs(hdl, tick);
}
+ odp_timer_cancel(test_timer);
+ odp_timer_free(test_timer);
+
if (odp_queue_sched_type(queue) == ODP_SCHED_SYNC_ATOMIC)
odp_schedule_release_atomic();
}
@@ -159,7 +173,6 @@ static void print_usage(void)
printf("Options:\n");
printf(" -c, --count <number> core count, core IDs
start from 1\n");
printf(" -r, --resolution <us> timeout resolution in
usec\n");
- printf(" -m, --min <us> minimum timeout in usec\n");
printf(" -x, --max <us> maximum timeout in usec\n");
printf(" -p, --period <us> timeout period in usec\n");
printf(" -t, --timeouts <count> timeout repeat count\n");
@@ -183,7 +196,6 @@ static void parse_args(int argc, char *argv[],
test_args_t *args)
static struct option longopts[] = {
{"count", required_argument, NULL, 'c'},
{"resolution", required_argument, NULL, 'r'},
- {"min", required_argument, NULL, 'm'},
{"max", required_argument, NULL, 'x'},
{"period", required_argument, NULL, 'p'},
{"timeouts", required_argument, NULL, 't'},
@@ -194,14 +206,13 @@ static void parse_args(int argc, char
*argv[], test_args_t *args)
/* defaults */
args->core_count = 0; /* all cores */
args->resolution_us = 10000;
- args->min_us = args->resolution_us;
args->max_us = 100000000;
args->period_us = 1000000;
args->tmo_count = 30;
while (1) {
opt = getopt_long(argc, argv, "+c:r:m:x:p:t:h",
- longopts, &long_index);
+ longopts, &long_index);
if (opt == -1)
break; /* No more options */
@@ -213,9 +224,6 @@ static void parse_args(int argc, char *argv[],
test_args_t *args)
case 'r':
args->resolution_us = atoi(optarg);
break;
- case 'm':
- args->min_us = atoi(optarg);
- break;
case 'x':
args->max_us = atoi(optarg);
break;
@@ -299,7 +307,6 @@ int main(int argc, char *argv[])
printf("first core: %i\n", first_core);
printf("resolution: %i usec\n", args.resolution_us);
- printf("min timeout: %i usec\n", args.min_us);
printf("max timeout: %i usec\n", args.max_us);
printf("period: %i usec\n", args.period_us);
printf("timeouts: %i\n", args.tmo_count);
@@ -323,10 +330,23 @@ int main(int argc, char *argv[])
ODP_BUFFER_TYPE_TIMEOUT);
if (pool == ODP_BUFFER_POOL_INVALID) {
- ODP_ERR("Pool create failed.\n");
+ ODP_ERR("Buffer pool create failed.\n");
return -1;
}
+ tp = odp_timer_pool_create("timer_pool", pool,
+ args.resolution_us*USEC,
+ args.max_us*USEC,
+ num_workers, /* One timer per
worker */
+ true,
+ ODP_CLOCK_DEFAULT);
+ if (tp == ODP_TIMER_POOL_INVALID) {
+ ODP_ERR("Timer pool create failed.\n");
+ return -1;
+ }
+
+ odp_shm_print_all();
+
/*
* Create a queue for timer test
*/
@@ -342,13 +362,6 @@ int main(int argc, char *argv[])
return -1;
}
- test_timer = odp_timer_create("test_timer", pool,
- args.resolution_us*USEC,
- args.min_us*USEC,
- args.max_us*USEC);
-
- odp_shm_print_all();
-
printf("CPU freq %"PRIu64" hz\n", odp_sys_cpu_hz());
printf("Cycles vs nanoseconds:\n");
ns = 0;
diff --git a/platform/linux-generic/Makefile.am
b/platform/linux-generic/Makefile.am
index f4dfdc1..e2bc1a7 100644
--- a/platform/linux-generic/Makefile.am
+++ b/platform/linux-generic/Makefile.am
@@ -72,4 +72,5 @@ __LIB__libodp_la_SOURCES = \
odp_thread.c \
odp_ticketlock.c \
odp_time.c \
+ priority_queue.c \
odp_timer.c
diff --git a/platform/linux-generic/include/api/odp_timer.h
b/platform/linux-generic/include/api/odp_timer.h
index 01db839..e5f961c 100644
--- a/platform/linux-generic/include/api/odp_timer.h
+++ b/platform/linux-generic/include/api/odp_timer.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013, Linaro Limited
+/* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
@@ -8,7 +8,175 @@
/**
* @file
*
- * ODP timer
+ * ODP timer service
+ *
+
+//Example #1 Retransmission timer (e.g. for reliable connections)
+
+//Create timer pool for reliable connections
+#define SEC 1000000000ULL //1s expressed in nanoseconds
+odp_timer_pool_t tcp_tpid =
+ odp_timer_pool_create("TCP",
+ buffer_pool,
+ 1000000,//resolution 1ms
+ 7200 * SEC,//max tmo length 2hours
+ 40000,//num_timers
+ true,//shared
+ ODP_CLOCK_DEFAULT
+ );
+if (tcp_tpid == ODP_TIMER_POOL_INVALID)
+{
+ //Failed to create timer pool => fatal error
+}
+
+
+//Setting up a new connection
+//Allocate retransmission timeout (identical for supervision timeout)
+//The user pointer points back to the connection context
+conn->ret_tim = odp_timer_alloc(tcp_tpid, queue, conn);
+//Check if all resources were successfully allocated
+if (conn->ret_tim == ODP_TIMER_INVALID)
+{
+ //Failed to allocate all resources for connection => tear down
+ //Destroy timeout
+ odp_timer_free(conn->ret_tim);
+ //Tear down connection
+ ...
+ return false;
+}
+//All necessary resources successfully allocated
+//Compute initial retransmission length in timer ticks
+conn->ret_len = odp_timer_ns_to_tick(tcp_tpid, 3 * SEC);//Per RFC1122
+//Arm the timer
+odp_timer_set_rel(conn->ret_tim, conn->ret_len);
+return true;
+
+
+//A packet for the connection has just been transmitted
+//Reset the retransmission timer
+odp_timer_set_rel(conn->ret_tim, conn->ret_len);
+
+
+//A retransmission timeout for the connection has been received
+//Check if timeout is fresh or stale, for stale timeouts we need
to reset the
+//timer
+switch (odp_timer_tmo_status(tmo))
+{
+ case ODP_TMO_FRESH :
+ //Fresh timeout, last transmitted packet not acked in time =>
+ retransmit
+ //Get connection from timeout event
+ conn = odp_timer_get_userptr(tmo);
+ //Retransmit last packet (e.g. TCP segment)
+ ...
+ //Re-arm timer using original delta value
+ odp_timer_set_rel(conn->ret_tim, conn->ret_len);
+ break;
+ case ODP_TMO_STALE :
+ break;//Do nothing
+ case ODP_TMO_ORPHAN :
+ odp_free_buffer(tmo);
+ return;//Get out of here
+}
+
+
+//Example #2 Periodic tick
+
+//Create timer pool for periodic ticks
+odp_timer_pool_t per_tpid =
+ odp_timer_pool_create("periodic-tick",
+ buffer_pool,
+ 1,//resolution 1ns
+ 1000000000,//maximum timeout length 1s
+ 10,//num_timers
+ false,//not shared
+ ODP_CLOCK_DEFAULT
+ );
+if (per_tpid == ODP_TIMER_POOL_INVALID)
+{
+ //Failed to create timer pool => fatal error
+}
+
+
+//Allocate periodic timer
+tim_1733 = odp_timer_alloc(per_tpid, queue, NULL);
+//Check if all resources were successfully allocated
+if (tim_1733 == ODP_TIMER_INVALID)
+{
+ //Failed to allocate all resources => tear down
+ //Destroy timeout
+ odp_timer_free(tim_1733);
+ //Tear down other state
+ ...
+ return false;
+}
+//All necessary resources successfully allocated
+//Compute tick period in timer ticks
+period_1733 = odp_timer_ns_to_tick(per_tpid, 1000000000U /
1733U);//1733Hz
+//Compute when next tick should expire
+next_1733 = odp_timer_current_tick(per_tpid) + period_1733;
+//Arm the periodic timer
+odp_timer_set_abs(tim_1733, next_1733);
+return true;
+
+
+
+//A periodic timer timeout has been received
+//Must call odp_timer_tmo_status() on timeout!
+ret = odp_timer_tmo_status(tmo);
+//We expect the timeout is fresh since we are not calling set or
cancel on
+//active or expired timers in this example
+assert(ret == ODP_TMO_FRESH);
+//Do processing driven by timeout *before*
+...
+do {
+ //Compute when the timer should expire next
+ next_1733 += period_1733;
+ //Check that this is in the future
+ if (likely(next_1733 > odp_timer_current_tick(per_tpid))
+ break;//Yes, done
+ //Else we missed a timeout
+ //Optionally attempt some recovery and/or logging of the
problem
+ ...
+} while (0);
+//Re-arm periodic timer
+odp_timer_set_abs(tim_1733, next_1733);
+//Or do processing driven by timeout *after*
+...
+return;
+
+//Example #3 Tear down of flow
+//ctx points to flow context data structure owned by application
+//Free the timer, cancelling any timeout
+odp_timer_free(ctx->timer);//Any enqueued timeout will be made
invalid
+//Continue tearing down and eventually freeing context
+...
+return;
+
+//A timeout has been received, check status
+switch (odp_timer_tmo_status(tmo))
+{
+ case ODP_TMO_FRESH :
+ //A flow has timed out, tear it down
+ //Find flow context from timeout
+ ctx = (context *)odp_timer_get_userptr(tmo);
+ //Free the supervision timer, any enqueued timeout will remain
+ odp_timer_free(ctx->tim);
+ //Free other flow related resources
+ ...
+ //Flow torn down
+ break;
+ case ODP_TMO_STALE :
+ //A stale timeout was received, timer automatically reset
+ break;
+ case ODP_TMO_ORPHAN :
+ //Orphaned timeout (from previously torn down flow)
+ //No corresponding timer or flow context
+ //Free the timeout
+ odp_buffer_free(tmo);
+ break;
+}
+
*/
#ifndef ODP_TIMER_H_
@@ -23,139 +191,325 @@ extern "C" {
#include <odp_buffer_pool.h>
#include <odp_queue.h>
+/**
+* ODP timer pool handle (platform dependent)
+*/
+struct odp_timer_pool;
+typedef struct odp_timer_pool *odp_timer_pool_t;
/**
- * ODP timer handle
+ * Invalid timer pool handle (platform dependent)
*/
-typedef uint32_t odp_timer_t;
+#define ODP_TIMER_POOL_INVALID NULL
-/** Invalid timer */
-#define ODP_TIMER_INVALID 0
+typedef enum odp_timer_pool_clock_source_e {
+ ODP_CLOCK_DEFAULT = 0,
+ /* Platform dependent which clock sources exist beyond
+ ODP_CLOCK_DEFAULT */
+ ODP_CLOCK_NONE = 1
+} odp_timer_pool_clock_source_t;
+/**
+* ODP timer handle (platform dependent)
+*/
+struct odp_timer;
+typedef struct odp_timer *odp_timer_t;
/**
- * ODP timeout handle
+ * Invalid timer handle (platform dependent)
*/
-typedef odp_buffer_t odp_timer_tmo_t;
-
-/** Invalid timeout */
-#define ODP_TIMER_TMO_INVALID 0
+#define ODP_TIMER_INVALID NULL
+/**
+ * ODP timeout event handle
+ */
+typedef odp_buffer_t odp_timer_tmo_t;
/**
- * Timeout notification
+ * ODP timeout status
*/
-typedef odp_buffer_t odp_timeout_t;
+typedef enum odp_timer_tmo_status_e {
+ ODP_TMO_FRESH, /* Timeout is fresh, process it */
+ ODP_TMO_STALE, /* Timer reset or cancelled, do nothing */
+ ODP_TMO_ORPHAN,/* Timer deleted, free timeout */
+} odp_timer_tmo_status_t;
+
+/**
+* ODP tick value
+*/
+typedef uint64_t odp_timer_tick_t;
/**
- * Create a timer
+ * Create a timer pool
*
- * Creates a new timer with requested properties.
+ * Create a new timer pool.
+ * odp_timer_pool_create() is typically called once or a couple
of times during
+ * application initialisation.
*
* @param name Name
- * @param pool Buffer pool for allocating timeout notifications
+ * @param buf_pool Buffer pool for allocating timers
* @param resolution Timeout resolution in nanoseconds
- * @param min_tmo Minimum timeout duration in nanoseconds
- * @param max_tmo Maximum timeout duration in nanoseconds
+ * @param max_tmo Maximum relative timeout in nanoseconds
+ * @param num_timers Number of supported timers (minimum)
+ * @param shared Shared or private timer pool.
+ * Operations on shared timers will include the
necessary
+ * mutual exclusion, operations on private timers
may not
+ * (mutual exclusion is the responsibility of the
caller).
+ * @param clk_src Clock source to use
+ *
+ * @return Timer pool handle if successful, otherwise
ODP_TIMER_POOL_INVALID
+ * and errno set
+ */
+odp_timer_pool_t
+odp_timer_pool_create(const char *name,
+ odp_buffer_pool_t buf_pool,
+ uint64_t resolution,
+ uint64_t max_tmo,
+ uint32_t num_timers,
+ bool shared,
+ odp_timer_pool_clock_source_t clk_src);
+
+/**
+ * Start a timer pool
+ *
+ * Start all created timer pools, enabling the allocation of timers.
+ * The purpose of this call is to coordinate the creation of
multiple timer
+ * pools that may use the same underlying HW resources.
+ * This function may be called multiple times.
+ */
+void odp_timer_pool_start(void);
+
+/**
+ * Destroy a timer pool
*
- * @return Timer handle if successful, otherwise ODP_TIMER_INVALID
+ * Destroy a timer pool, freeing all resources.
+ * All timers must have been freed.
+ *
+ * @param tpid Timer pool identifier
*/
-odp_timer_t odp_timer_create(const char *name, odp_buffer_pool_t
pool,
- uint64_t resolution, uint64_t min_tmo,
- uint64_t max_tmo);
+void odp_timer_pool_destroy(odp_timer_pool_t tpid);
/**
* Convert timer ticks to nanoseconds
*
- * @param timer Timer
+ * @param tpid Timer pool identifier
* @param ticks Timer ticks
*
* @return Nanoseconds
*/
-uint64_t odp_timer_tick_to_ns(odp_timer_t timer, uint64_t ticks);
+uint64_t odp_timer_tick_to_ns(odp_timer_pool_t tpid,
odp_timer_tick_t ticks);
/**
* Convert nanoseconds to timer ticks
*
- * @param timer Timer
+ * @param tpid Timer pool identifier
* @param ns Nanoseconds
*
* @return Timer ticks
*/
-uint64_t odp_timer_ns_to_tick(odp_timer_t timer, uint64_t ns);
+odp_timer_tick_t odp_timer_ns_to_tick(odp_timer_pool_t tpid,
uint64_t ns);
/**
- * Timer resolution in nanoseconds
+ * Current tick value
*
- * @param timer Timer
+ * @param tpid Timer pool identifier
*
- * @return Resolution in nanoseconds
+ * @return Current time in timer ticks
+ */
+odp_timer_tick_t odp_timer_current_tick(odp_timer_pool_t tpid);
+
+/**
+ * ODP timer configurations
*/
-uint64_t odp_timer_resolution(odp_timer_t timer);
+
+typedef enum odp_timer_pool_conf_e {
+ ODP_TIMER_NAME, /* Return name of timer pool */
+ ODP_TIMER_RESOLUTION,/* Return the timer resolution (in ns) */
+ ODP_TIMER_MAX_TMO, /* Return the maximum supported
timeout (in ns) */
+ ODP_TIMER_NUM_TIMERS,/* Return number of supported timers */
+ ODP_TIMER_SHARED /* Return shared flag */
+} odp_timer_pool_conf_t;
/**
- * Maximum timeout in timer ticks
+ * Query different timer pool configurations, e.g.
+ * Timer resolution in nanoseconds
+ * Maximum timeout in timer ticks
+ * Number of supported timers
+ * Shared or private timer pool
*
- * @param timer Timer
+ * @param tpid Timer pool identifier
+ * @param item Configuration item being queried
*
- * @return Maximum timeout in timer ticks
+ * @return the requested piece of information or 0 for unknown item.
*/
-uint64_t odp_timer_maximum_tmo(odp_timer_t timer);
+uint64_t odp_timer_pool_query_conf(odp_timer_pool_t tpid,
+ odp_timer_pool_conf_t item);
/**
- * Current timer tick
+ * Allocate a timer
*
- * @param timer Timer
+ * Create a timer (allocating all necessary resources e.g.
timeout event) from
+ * the timer pool.
*
- * @return Current time in timer ticks
+ * @param tpid Timer pool identifier
+ * @param queue Destination queue for timeout notifications
+ * @param user_ptr User defined pointer or NULL (copied to timeouts)
+ *
+ * @return Timer handle if successful, otherwise
ODP_TIMER_INVALID and
+ * errno set.
+ */
+odp_timer_t odp_timer_alloc(odp_timer_pool_t tpid,
+ odp_queue_t queue,
+ void *user_ptr);
+
+/**
+ * Free a timer
+ *
+ * Free (destroy) a timer, freeing all associated resources (e.g.
default
+ * timeout event). An expired and enqueued timeout event will not
be freed.
+ * It is the responsibility of the application to free this
timeout when it
+ * is received.
+ *
+ * @param tim Timer handle
*/
-uint64_t odp_timer_current_tick(odp_timer_t timer);
+void odp_timer_free(odp_timer_t tim);
/**
- * Request timeout with an absolute timer tick
+ * Set a timer (absolute time) with a user-defined timeout buffer
*
- * When tick reaches tmo_tick, the timer enqueues the timeout
notification into
- * the destination queue.
+ * Set (arm) the timer to expire at specific time. The user-defined
+ * buffer will be enqueued when the timer expires.
+ * Arming may fail (if the timer is in state EXPIRED), an earlier
timeout
+ * will then be received. odp_timer_tmo_status() must be used to
check if
+ * the received timeout is valid.
*
- * @param timer Timer
- * @param tmo_tick Absolute timer tick value which triggers the
timeout
- * @param queue Destination queue for the timeout notification
- * @param buf User defined timeout notification buffer. When
- * ODP_BUFFER_INVALID, default timeout
notification is used.
+ * Note: any invalid parameters will be treated as programming
errors and will
+ * cause the application to abort.
+ * Note: a timeout too near in time may be delivered immediately.
+ * Note: a timeout too far away in time (beyond max_timeout)
might be delivered
+ * early.
*
- * @return Timeout handle if successful, otherwise
ODP_TIMER_TMO_INVALID
+ * @param tim Timer
+ * @param abs_tck Expiration time in absolute timer ticks
+ * @param user_buf The buffer to use as timeout event
*/
-odp_timer_tmo_t odp_timer_absolute_tmo(odp_timer_t timer,
uint64_t tmo_tick,
- odp_queue_t queue,
odp_buffer_t buf);
+void odp_timer_set_abs_w_buf(odp_timer_t tim,
+ odp_timer_tick_t abs_tck,
+ odp_buffer_t user_buf);
/**
- * Cancel a timeout
+ * Set a timer with an absolute expiration time
+ *
+ * Set (arm) the timer to expire at a specific time.
+ * Arming may fail (if the timer is in state EXPIRED), an earlier
timeout
+ * will then be received. odp_timer_tmo_status() must be used to
check if
+ * the received timeout is valid.
*
- * @param timer Timer
- * @param tmo Timeout to cancel
+ * Note: any invalid parameters will be treated as programming
errors and will
+ * cause the application to abort.
+ * Note: a timeout too near in time may be delivered immediately.
+ * Note: a timeout too far away in time (beyond max_timeout)
might be delivered
+ * early, it will automatically be reset by odp_timer_tmo_status().
*
- * @return 0 if successful
+ * @param tim Timer
+ * @param abs_tck Expiration time in absolute timer ticks
*/
-int odp_timer_cancel_tmo(odp_timer_t timer, odp_timer_tmo_t tmo);
+void odp_timer_set_abs(odp_timer_t tim, odp_timer_tick_t abs_tck);
/**
- * Convert buffer handle to timeout handle
+ * Set a timer with a relative expiration time
*
- * @param buf Buffer handle
+ * Set (arm) the timer to expire at a relative future time.
+ * Arming may fail (if the timer is in state EXPIRED),
+ * an earlier timeout will then be received.
odp_timer_tmo_status() must
+ * be used to check if the received timeout is valid.
*
- * @return Timeout buffer handle
+ * Note: any invalid parameters will be treated as programming
errors and will
+ * cause the application to abort.
+ * Note: a timeout too near in time may be delivered immediately.
+ * Note: a timeout too far away in time (beyond max_timeout)
might be delivered
+ * early, it will automatically be reset by odp_timer_tmo_status().
+ *
+ * @param tim Timer
+ * @param rel_tck Expiration time in timer ticks relative to
current time of
+ * the timer pool the timer belongs to
*/
-odp_timeout_t odp_timeout_from_buffer(odp_buffer_t buf);
+void odp_timer_set_rel(odp_timer_t tim, odp_timer_tick_t rel_tck);
/**
- * Return absolute timeout tick
+ * Cancel a timer
+ *
+ * Cancel a timer, preventing future expiration and delivery.
+ *
+ * A timer that has already expired and been enqueued for
delivery may be
+ * impossible to cancel and will instead be delivered to the
destination queue.
+ * Use odp_timer_tmo_status() the check whether a received
timeout is fresh or
+ * stale (cancelled). Stale timeouts will automatically be recycled.
*
- * @param tmo Timeout buffer handle
+ * Note: any invalid parameters will be treated as programming
errors and will
+ * cause the application to abort.
*
- * @return Absolute timeout tick
+ * @param tim Timer handle
*/
-uint64_t odp_timeout_tick(odp_timeout_t tmo);
+void odp_timer_cancel(odp_timer_t tim);
+
+/**
+ * Return fresh/stale/orphan status of timeout.
+ *
+ * Check a received timeout for orphaness (i.e. parent timer
freed) and
+ * staleness (i.e. parent timer has been reset or cancelled after
timeout
+ * was enqueued).
+ * If the timeout is fresh, it should be processed.
+ * If the timeout is stale, the timer will automatically be reset
unless it
+ * was cancelled.
+ * If the timeout is orphaned, it should be freed (by the caller).
+ *
+ * Note: odp_timer_tmo_status() must be called on all received (not
+ * user-defined) timeouts!
+ *
+ * @param tmo Timeout
+ *
+ * @return ODP_TMO_FRESH, ODP_TMO_STALE, ODP_TMO_ORPHAN
+ */
+odp_timer_tmo_status_t odp_timer_tmo_status(odp_timer_tmo_t tmo);
+
+/**
+ * Get timer handle
+ *
+ * Return Handle of parent timer.
+ *
+ * @param tmo Timeout
+ *
+ * @return Timer handle or ODP_TIMER_INVALID for orphaned timeouts
+ */
+odp_timer_t odp_timer_get_handle(odp_timer_tmo_t tmo);
+
+/**
+ * Get expiration time
+ *
+ * Return (actual) expiration time of timeout.
+ *
+ * @param tmo Timeout
+ *
+ * @return Expiration time
+ */
+odp_timer_tick_t odp_timer_get_expiry(odp_timer_tmo_t tmo);
+
+/**
+ * Get user pointer
+ *
+ * Return User pointer of timer associated with timeout.
+ * The user pointer is often used to point to some associated
context.
+ *
+ * @param tmo Timeout
+ *
+ * @return User pointer
+ */
+void *odp_timer_get_userptr(odp_timer_tmo_t tmo);
+
+/* Helper functions */
+unsigned odp_timer_pool_expire(odp_timer_pool_t tpid,
odp_timer_tick_t tick);
#ifdef __cplusplus
}
diff --git a/platform/linux-generic/include/odp_timer_internal.h
b/platform/linux-generic/include/odp_timer_internal.h
index ad28f53..ff8f209 100644
--- a/platform/linux-generic/include/odp_timer_internal.h
+++ b/platform/linux-generic/include/odp_timer_internal.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013, Linaro Limited
+/* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
@@ -8,72 +8,53 @@
/**
* @file
*
- * ODP timer timeout descriptor - implementation internal
+ * ODP timeout descriptor - implementation internal
*/
#ifndef ODP_TIMER_INTERNAL_H_
#define ODP_TIMER_INTERNAL_H_
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <odp_std_types.h>
-#include <odp_queue.h>
-#include <odp_buffer.h>
+#include <odp_align.h>
+#include <odp_debug.h>
#include <odp_buffer_internal.h>
#include <odp_buffer_pool_internal.h>
#include <odp_timer.h>
-struct timeout_t;
-
-typedef struct timeout_t {
- struct timeout_t *next;
- int timer_id;
- int tick;
- uint64_t tmo_tick;
- odp_queue_t queue;
- odp_buffer_t buf;
- odp_buffer_t tmo_buf;
-} timeout_t;
-
-
-struct odp_timeout_hdr_t;
-
/**
- * Timeout notification header
+ * Internal Timeout header
*/
-typedef struct odp_timeout_hdr_t {
+typedef struct {
+ /* common buffer header */
odp_buffer_hdr_t buf_hdr;
- timeout_t meta;
-
+ /* Requested expiration time */
+ odp_timer_tick_t expiration;
+ /* User ptr inherited from parent timer */
+ void *user_ptr;
+ /* Parent timer */
+ odp_timer_t timer;
+ /* Tag inherited from parent timer at time of expiration */
+ uint32_t tag;
+ /* Gen-cnt inherited from parent timer at time of creation */
+ uint32_t gc;
uint8_t buf_data[];
} odp_timeout_hdr_t;
-
-
+/* C++ doesn't allow offsetof() on "non-POD" datatypes. Don't
know why
+ odp_timeout_hdr_t is classified as non-POD, perhaps because of the
+ inheritance? */
ODP_STATIC_ASSERT(sizeof(odp_timeout_hdr_t) ==
- ODP_OFFSETOF(odp_timeout_hdr_t, buf_data),
- "ODP_TIMEOUT_HDR_T__SIZE_ERR");
-
+ ODP_OFFSETOF(odp_timeout_hdr_t, buf_data),
+ "sizeof(odp_timeout_hdr_t) ==
ODP_OFFSETOF(odp_timeout_hdr_t, buf_data)");
ODP_STATIC_ASSERT(sizeof(odp_timeout_hdr_t) % sizeof(uint64_t) == 0,
- "ODP_TIMEOUT_HDR_T__SIZE_ERR2");
-
+ "sizeof(odp_timeout_hdr_t) % sizeof(uint64_t) ==
0");
/**
- * Return timeout header
+ * Return the timeout header
*/
-static inline odp_timeout_hdr_t *odp_timeout_hdr(odp_timeout_t tmo)
+static inline odp_timeout_hdr_t *odp_timeout_hdr(odp_buffer_t buf)
{
- odp_buffer_hdr_t *buf_hdr = odp_buf_to_hdr((odp_buffer_t)tmo);
- return (odp_timeout_hdr_t *)(uintptr_t)buf_hdr;
-}
-
-
-
-#ifdef __cplusplus
+ return (odp_timeout_hdr_t *)odp_buf_to_hdr(buf);
}
-#endif
#endif
diff --git a/platform/linux-generic/odp_timer.c
b/platform/linux-generic/odp_timer.c
index 1bf37f9..cea47a3 100644
--- a/platform/linux-generic/odp_timer.c
+++ b/platform/linux-generic/odp_timer.c
@@ -1,402 +1,631 @@
-/* Copyright (c) 2013, Linaro Limited
+/* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
-#include <odp_timer.h>
-#include <odp_timer_internal.h>
-#include <odp_buffer_pool_internal.h>
-#include <odp_internal.h>
-#include <odp_atomic.h>
-#include <odp_spinlock.h>
-#include <odp_sync.h>
-#include <odp_debug.h>
-#include <signal.h>
-#include <time.h>
+/**
+ * @file
+ *
+ * ODP timer service
+ *
+ */
+#include <assert.h>
+#include <errno.h>
#include <string.h>
-
-#define NUM_TIMERS 1
-#define MAX_TICKS 1024
-#define RESOLUTION_NS 1000000
-
-
-typedef struct {
- odp_spinlock_t lock;
- timeout_t *list;
-} tick_t;
-
-typedef struct {
- int allocated;
- volatile int active;
- volatile uint64_t cur_tick;
- timer_t timerid;
- odp_timer_t timer_hdl;
- odp_buffer_pool_t pool;
- uint64_t resolution_ns;
- uint64_t max_ticks;
- tick_t tick[MAX_TICKS];
-
-} timer_ring_t;
-
-typedef struct {
- odp_spinlock_t lock;
- int num_timers;
- timer_ring_t timer[NUM_TIMERS];
-
-} timer_global_t;
-
-/* Global */
-static timer_global_t odp_timer;
-
-static void add_tmo(tick_t *tick, timeout_t *tmo)
+#include <stdlib.h>
+#include <time.h>
+#include <signal.h>
+#include "odp_std_types.h"
+#include "odp_buffer.h"
+#include "odp_buffer_pool.h"
+#include "odp_queue.h"
+#include "odp_hints.h"
+#include "odp_sync.h"
+#include "odp_spinlock.h"
+#include "odp_debug.h"
+#include "odp_align.h"
+#include "odp_shared_memory.h"
+#include "odp_hints.h"
+#include "odp_internal.h"
+#include "odp_timer.h"
+#include "odp_timer_internal.h"
+#include "priority_queue.h"
+
+typedef struct odp_timer {
+ pq_element pqelem;/* Base class */
+ odp_timer_tick_t req_tmo;/* Requested timeout tick */
+ odp_buffer_t tmo_buf;/* ODP_BUFFER_INVALID if timeout
enqueued */
+ odp_queue_t queue;/* ODP_QUEUE_INVALID if timer is free */
+ uint32_t tag;/* Reusing tag as next pointer/index when
timer is free */
+ uint32_t gc;
+ bool user_buf; /* User-defined buffer? */
+} odp_timer;
+
+/* Constructor for array of objects */
+static inline void odp_timer_con(odp_timer *this)
{
- odp_spinlock_lock(&tick->lock);
-
- tmo->next = tick->list;
- tick->list = tmo;
-
- odp_spinlock_unlock(&tick->lock);
+ pq_element_con(&this->pqelem);
+ this->tmo_buf = ODP_BUFFER_INVALID;
+ this->queue = ODP_QUEUE_INVALID;
+ this->gc = 0;
}
-static timeout_t *rem_tmo(tick_t *tick)
+/* Destructor */
+static inline void odp_timer_des(odp_timer *this)
{
- timeout_t *tmo;
-
- odp_spinlock_lock(&tick->lock);
-
- tmo = tick->list;
-
- if (tmo)
- tick->list = tmo->next;
-
- odp_spinlock_unlock(&tick->lock);
+ assert(this->tmo_buf == ODP_BUFFER_INVALID);
+ assert(this->queue == ODP_QUEUE_INVALID);
+ pq_element_des(&this->pqelem);
+}
- if (tmo)
- tmo->next = NULL;
+/* Setup when timer is allocated */
+static void setup(odp_timer *this,
+ odp_queue_t _q,
+ void *_up,
+ odp_buffer_t _tmo)
+{
+ this->req_tmo = INVALID_PRIORITY;
+ this->tmo_buf = _tmo;
+ this->queue = _q;
+ this->tag = 0;
+ this->user_buf = false;
+ /* Initialise constant fields of timeout event */
+ odp_timeout_hdr_t *tmo_hdr =
+ (odp_timeout_hdr_t *)odp_buf_to_hdr(this->tmo_buf);
+ tmo_hdr->gc = this->gc;
+ tmo_hdr->timer = this;
+ tmo_hdr->user_ptr = _up;
+ /* tmo_hdr->tag set at expiration time */
+ /* tmo_hdr->expiration set at expiration time */
+ assert(this->queue != ODP_QUEUE_INVALID);
+}
- return tmo;
+/* Teardown when timer is freed */
+static odp_buffer_t teardown(odp_timer *this)
+{
+ /* Increase generation count to make pending timeout
orphaned */
+ ++this->gc;
+ odp_buffer_t buf = this->tmo_buf;
+ this->tmo_buf = ODP_BUFFER_INVALID;
+ this->queue = ODP_QUEUE_INVALID;
+ return buf;
}
-/**
- * Search and delete tmo entry from timeout list
- * return -1 : on error.. handle not in list
- * 0 : success
- */
-static int find_and_del_tmo(timeout_t **tmo, odp_timer_tmo_t handle)
+static inline uint32_t get_next_free(odp_timer *this)
{
- timeout_t *cur, *prev;
- prev = NULL;
+ assert(this->queue == ODP_QUEUE_INVALID);
+ return this->tag;
+}
- for (cur = *tmo; cur != NULL; prev = cur, cur = cur->next) {
- if (cur->tmo_buf == handle) {
- if (prev == NULL)
- *tmo = cur->next;
- else
- prev->next = cur->next;
+static inline void set_next_free(odp_timer *this, uint32_t nf)
+{
+ assert(this->queue == ODP_QUEUE_INVALID);
+ this->tag = nf;
+}
- break;
+static inline void expire(odp_timer *this, odp_timer_tick_t tick)
+{
+ /* Timer expired, is there actually any timeout event */
+ /* we can enqueue? */
+ if (odp_likely(this->tmo_buf != ODP_BUFFER_INVALID)) {
+ /* Swap out timeout buffer */
+ odp_buffer_t buf = this->tmo_buf;
+ this->tmo_buf = ODP_BUFFER_INVALID;
+ if (odp_likely(!this->user_buf)) {
+ odp_timeout_hdr_t *tmo_hdr =
+ (odp_timeout_hdr_t
*)odp_buf_to_hdr(buf);
+ /* Copy tag from timer */
+ /* and actual expiration tick from timer
pool */
+ tmo_hdr->tag = this->tag;
+ tmo_hdr->expiration = tick;
}
+ /* Else don't touch user-defined buffer */
+ int rc = odp_queue_enq(this->queue, buf);
+ if (rc != 0)
+ abort();
}
-
- if (!cur)
- /* couldn't find tmo in list */
- return -1;
-
- /* application to free tmo_buf provided by absolute_tmo
call */
- return 0;
+ /* No, timeout event already enqueued */
}
-int odp_timer_cancel_tmo(odp_timer_t timer_hdl, odp_timer_tmo_t tmo)
+typedef struct odp_timer_pool {
+ priority_queue pq;
+ uint64_t tick;
+ bool shared;
+ odp_spinlock_t lock;
+ const char *name;
+ odp_buffer_pool_t buf_pool;
+ uint64_t resolution_ns;
+ uint64_t max_timeout;
+ odp_timer *timers;
+ uint32_t num_alloc;/* Current number of allocated timers */
+ uint32_t max_timers;/* Max number of timers */
+ uint32_t first_free;/* 0..max_timers-1 => free timer */
+ timer_t timerid;
+ odp_timer_pool_clock_source_t clk_src;
+} odp_timer_pool;
+
+/* Forward declarations */
+static void timer_init(odp_timer_pool *tp);
+static void timer_exit(odp_timer_pool *tp);
+
+static void odp_timer_pool_con(odp_timer_pool *this,
+ const char *_n,
+ odp_buffer_pool_t _bp,
+ uint64_t _r,
+ uint64_t _m,
+ uint32_t _mt,
+ bool _s,
+ odp_timer_pool_clock_source_t _cs)
{
- int id;
- uint64_t tick_idx;
- timeout_t *cancel_tmo;
- odp_timeout_hdr_t *tmo_hdr;
- tick_t *tick;
-
- /* get id */
- id = timer_hdl - 1;
-
- tmo_hdr = odp_timeout_hdr((odp_timeout_t) tmo);
- /* get tmo_buf to cancel */
- cancel_tmo = &tmo_hdr->meta;
-
- tick_idx = cancel_tmo->tick;
- tick = &odp_timer.timer[id].tick[tick_idx];
-
- odp_spinlock_lock(&tick->lock);
- /* search and delete tmo from tick list */
- if (find_and_del_tmo(&tick->list, tmo) != 0) {
- odp_spinlock_unlock(&tick->lock);
- ODP_DBG("Couldn't find the tmo (%d) in tick
list\n", (int)tmo);
- return -1;
+ priority_queue_con(&this->pq, _mt);
+ this->tick = 0;
+ this->shared = _s;
+ this->name = strdup(_n);
+ this->buf_pool = _bp;
+ this->resolution_ns = _r;
+ this->max_timeout = _m;
+ this->num_alloc = 0;
+ this->max_timers = _mt;
+ this->first_free = 0;
+ this->clk_src = _cs;
+ this->timers = malloc(sizeof(odp_timer) * this->max_timers);
+ if (this->timers == NULL) {
+ ODP_ERR("%s: malloc failed\n", _n);
+ abort();
}
- odp_spinlock_unlock(&tick->lock);
-
- return 0;
+ uint32_t i;
+ for (i = 0; i < this->max_timers; i++)
+ odp_timer_con(&this->timers[i]);
+ for (i = 0; i < this->max_timers; i++)
+ set_next_free(&this->timers[i], i + 1);
+ odp_spinlock_init(&this->lock);
+ if (this->clk_src == ODP_CLOCK_DEFAULT)
+ timer_init(this);
+ /* Make sure timer pool initialisation is globally
observable */
+ /* before we return a pointer to it */
+ odp_sync_stores();
}
-static void notify_function(union sigval sigval)
+static odp_timer_pool *odp_timer_pool_new(
+ const char *_n,
+ odp_buffer_pool_t _bp,
+ uint64_t _r,
+ uint64_t _m,
+ uint32_t _mt,
+ bool _s,
+ odp_timer_pool_clock_source_t _cs)
{
- uint64_t cur_tick;
- timeout_t *tmo;
- tick_t *tick;
- timer_ring_t *timer;
-
- timer = sigval.sival_ptr;
-
- if (timer->active == 0) {
- ODP_DBG("Timer (%u) not active\n", timer->timer_hdl);
- return;
+ odp_timer_pool *this = malloc(sizeof(odp_timer_pool));
+ if (odp_unlikely(this == NULL)) {
+ ODP_ERR("%s: malloc failed\n", _n);
+ abort();
}
+ odp_timer_pool_con(this, _n, _bp, _r, _m, _mt, _s, _cs);
+ return this;
+}
- /* ODP_DBG("Tick\n"); */
+static void odp_timer_pool_des(odp_timer_pool *this)
+{
+ if (this->shared)
+ odp_spinlock_lock(&this->lock);
+ if (this->num_alloc != 0) {
+ /* It's a programming error to attempt to destroy a */
+ /* timer pool which is still in use */
+ ODP_ERR("%s: timers in use\n", this->name);
+ abort();
+ }
+ if (this->clk_src == ODP_CLOCK_DEFAULT)
+ timer_exit(this);
+ uint32_t i;
+ for (i = 0; i < this->max_timers; i++)
+ odp_timer_des(&this->timers[i]);
+ free(this->timers);
+ priority_queue_des(&this->pq);
+ odp_sync_stores();
+}
- cur_tick = timer->cur_tick++;
+static void odp_timer_pool_del(odp_timer_pool *this)
+{
+ odp_timer_pool_des(this);
+ free(this);
+}
- odp_sync_stores();
+static inline odp_timer *timer_alloc(odp_timer_pool *this,
+ odp_queue_t queue,
+ void *user_ptr,
+ odp_buffer_t tmo_buf)
+{
+ odp_timer *tim = ODP_TIMER_INVALID;
+ if (odp_likely(this->shared))
+ odp_spinlock_lock(&this->lock);
+ if (odp_likely(this->num_alloc < this->max_timers)) {
+ this->num_alloc++;
+ /* Remove first unused timer from free list */
+ assert(this->first_free != this->max_timers);
+ tim = &this->timers[this->first_free];
+ this->first_free = get_next_free(tim);
+ /* Insert timer into priority queue */
+ if (odp_unlikely(!pq_register_element(&this->pq,
+ &tim->pqelem))) {
+ /* Unexpected internal error */
+ abort();
+ }
+ /* Create timer */
+ setup(tim, queue, user_ptr, tmo_buf);
+ } else {
+ errno = ENFILE; /* Reusing file table overvlow */
+ }
+ if (odp_likely(this->shared))
+ odp_spinlock_unlock(&this->lock);
+ return tim;
+}
- tick = &timer->tick[cur_tick % MAX_TICKS];
+static inline void timer_free(odp_timer_pool *this, odp_timer *tim)
+{
+ if (odp_likely(this->shared))
+ odp_spinlock_lock(&this->lock);
+ /* Destroy timer */
+ odp_buffer_t buf = teardown(tim);
+ /* Remove timer from priority queue */
+ pq_unregister_element(&this->pq, &tim->pqelem);
+ /* Insert timer into free list */
+ set_next_free(tim, this->first_free);
+ this->first_free = (tim - &this->timers[0]) /
sizeof(this->timers[0]);
+ assert(this->num_alloc != 0);
+ this->num_alloc--;
+ if (odp_likely(this->shared))
+ odp_spinlock_unlock(&this->lock);
+ if (buf != ODP_BUFFER_INVALID)
+ odp_buffer_free(buf);
+}
- while ((tmo = rem_tmo(tick)) != NULL) {
- odp_queue_t queue;
- odp_buffer_t buf;
+static inline void timer_reset(odp_timer_pool *this,
+ odp_timer *tim,
+ odp_timer_tick_t abs_tck)
+{
+ if (odp_likely(this->shared))
+ odp_spinlock_lock(&this->lock);
+ /* Increase timer tag to make any pending timeout stale */
+ tim->tag++;
+ /* Save requested timeout */
+ tim->req_tmo = abs_tck;
+ /* Update timer position in priority queue */
+ pq_reset_element(&this->pq, &tim->pqelem, abs_tck);
+ if (odp_likely(this->shared))
+ odp_spinlock_unlock(&this->lock);
+}
- queue = tmo->queue;
- buf = tmo->buf;
+static inline void timer_reset_w_buf(odp_timer_pool *this,
+ odp_timer *tim,
+ odp_timer_tick_t abs_tck,
+ odp_buffer_t user_buf)
+{
+ if (odp_likely(this->shared))
+ odp_spinlock_lock(&this->lock);
+ /* Increase timer tag to make any pending timeout stale */
+ tim->tag++;
+ /* Save requested timeout */
+ tim->req_tmo = abs_tck;
+ /* Set flag indicating presence of user defined buffer */
+ tim->user_buf = true;
+ /* Swap in new buffer, get any old buffer pointer */
+ odp_buffer_t old_buf = tim->tmo_buf;
+ tim->tmo_buf = user_buf;
+ /* Update timer position in priority queue */
+ pq_reset_element(&this->pq, &tim->pqelem, abs_tck);
+ if (odp_likely(this->shared))
+ odp_spinlock_unlock(&this->lock);
+ /* Free old buffer if present */
+ if (odp_unlikely(old_buf != ODP_BUFFER_INVALID))
+ odp_buffer_free(old_buf);
+}
- if (buf != tmo->tmo_buf)
- odp_buffer_free(tmo->tmo_buf);
+static inline void timer_cancel(odp_timer_pool *this,
+ odp_timer *tim)
+{
+ odp_buffer_t tmo_buf = ODP_BUFFER_INVALID;
+ if (odp_likely(this->shared))
+ odp_spinlock_lock(&this->lock);
+ if (odp_unlikely(tim->user_buf)) {
+ /* Swap out old user buffer */
+ tmo_buf = tim->tmo_buf;
+ tim->tmo_buf = ODP_BUFFER_INVALID;
+ tim->user_buf = false;
+ }
+ /* Else a normal timer (no user-defined buffer) */
+ /* Increase timer tag to make any pending timeout stale */
+ tim->tag++;
+ /* Clear requested timeout */
+ tim->req_tmo = INVALID_PRIORITY;
+ /* Remove timer from the priority queue */
+ pq_deactivate_element(&this->pq, &tim->pqelem);
+ if (odp_likely(this->shared))
+ odp_spinlock_unlock(&this->lock);
+ /* Free user-defined buffer if present */
+ if (odp_unlikely(tmo_buf != ODP_BUFFER_INVALID))
+ odp_buffer_free(tmo_buf);
+}
- odp_queue_enq(queue, buf);
+unsigned odp_timer_pool_expire(odp_timer_pool_t tpid,
odp_timer_tick_t tick)
+{
+ odp_spinlock_lock(&tpid->lock);
+ unsigned nexp = 0;
+ odp_timer_t tim;
+ tpid->tick = tick;
+ while ((tim = (odp_timer_t)pq_release_element(&tpid->pq,
tick)) !=
+ ODP_TIMER_INVALID) {
+ assert(get_prio(&tim->pqelem) <= tick);
+ expire(tim, tick);
+ nexp++;
}
+ odp_spinlock_unlock(&tpid->lock);
+ return nexp;
}
-static void timer_start(timer_ring_t *timer)
+/* Functions that use Linux/POSIX per-process timers and related
facilities */
+static void timer_notify(union sigval sigval)
+{
+ odp_timer_pool *tp = (odp_timer_pool *)sigval.sival_ptr;
+ uint64_t new_tick = tp->tick + 1;
+ (void)odp_timer_pool_expire(tp, new_tick);
+}
+
+static void timer_init(odp_timer_pool *tp)
{
struct sigevent sigev;
struct itimerspec ispec;
- ODP_DBG("\nTimer (%u) starts\n", timer->timer_hdl);
+ ODP_DBG("Creating POSIX timer for timer pool %s, period %"
+ PRIu64" ns\n", tp->name, tp->resolution_ns);
memset(&sigev, 0, sizeof(sigev));
memset(&ispec, 0, sizeof(ispec));
sigev.sigev_notify = SIGEV_THREAD;
- sigev.sigev_notify_function = notify_function;
- sigev.sigev_value.sival_ptr = timer;
+ sigev.sigev_notify_function = timer_notify;
+ sigev.sigev_value.sival_ptr = tp;
- if (timer_create(CLOCK_MONOTONIC, &sigev, &timer->timerid)) {
- ODP_DBG("Timer create failed\n");
- return;
+ if (timer_create(CLOCK_MONOTONIC, &sigev, &tp->timerid)) {
+ perror("timer_create");
+ abort();
}
ispec.it_interval.tv_sec = 0;
- ispec.it_interval.tv_nsec = RESOLUTION_NS;
+ ispec.it_interval.tv_nsec = tp->resolution_ns;
ispec.it_value.tv_sec = 0;
- ispec.it_value.tv_nsec = RESOLUTION_NS;
+ ispec.it_value.tv_nsec = tp->resolution_ns;
- if (timer_settime(timer->timerid, 0, &ispec, NULL)) {
- ODP_DBG("Timer set failed\n");
- return;
+ if (timer_settime(&tp->timerid, 0, &ispec, NULL)) {
+ perror("timer_settime");
+ abort();
}
-
- return;
}
-int odp_timer_init_global(void)
+static void timer_exit(odp_timer_pool *tp)
{
- ODP_DBG("Timer init ...");
-
- memset(&odp_timer, 0, sizeof(timer_global_t));
-
- odp_spinlock_init(&odp_timer.lock);
-
- ODP_DBG("done\n");
-
- return 0;
+ if (timer_delete(tp->timerid) != 0) {
+ perror("timer_delete");
+ abort();
+ }
}
-int odp_timer_disarm_all(void)
+odp_timer_pool_t
+odp_timer_pool_create(const char *name,
+ odp_buffer_pool_t buf_pool,
+ uint64_t resolution_ns,
+ uint64_t max_timeout,
+ uint32_t num_timers,
+ bool shared,
+ odp_timer_pool_clock_source_t clk_src)
{
- int timers;
- struct itimerspec ispec;
-
- odp_spinlock_lock(&odp_timer.lock);
-
- timers = odp_timer.num_timers;
-
- ispec.it_interval.tv_sec = 0;
- ispec.it_interval.tv_nsec = 0;
- ispec.it_value.tv_sec = 0;
- ispec.it_value.tv_nsec = 0;
-
- for (; timers >= 0; timers--) {
- if (timer_settime(odp_timer.timer[timers].timerid,
- 0, &ispec, NULL)) {
- ODP_DBG("Timer reset failed\n");
- odp_spinlock_unlock(&odp_timer.lock);
- return -1;
- }
- odp_timer.num_timers--;
+ /* Verify that buffer pool can be used for timeouts */
+ odp_buffer_t buf = odp_buffer_alloc(buf_pool);
+ if (buf == ODP_BUFFER_INVALID) {
+ ODP_ERR("%s: Failed to allocate buffer\n", name);
+ abort();
}
+ if (odp_buffer_type(buf) != ODP_BUFFER_TYPE_TIMEOUT) {
+ ODP_ERR("%s: Buffer pool wrong type\n", name);
+ abort();
+ }
+ odp_buffer_free(buf);
+ odp_timer_pool_t tp = odp_timer_pool_new(name, buf_pool,
resolution_ns,
+ max_timeout, num_timers,
+ shared, clk_src);
+ return tp;
+}
- odp_spinlock_unlock(&odp_timer.lock);
+void odp_timer_pool_start(void)
+{
+ /* Nothing to do here */
+}
- return 0;
+void odp_timer_pool_destroy(odp_timer_pool_t tpid)
+{
+ odp_timer_pool_del(tpid);
}
-odp_timer_t odp_timer_create(const char *name, odp_buffer_pool_t
pool,
- uint64_t resolution, uint64_t min_tmo,
- uint64_t max_tmo)
+uint64_t odp_timer_tick_to_ns(odp_timer_pool_t tpid,
odp_timer_tick_t ticks)
{
- uint32_t id;
- timer_ring_t *timer;
- odp_timer_t timer_hdl;
- int i;
- (void) name; (void) resolution; (void) min_tmo; (void)
max_tmo;
+ return ticks * tpid->resolution_ns;
+}
- odp_spinlock_lock(&odp_timer.lock);
+odp_timer_tick_t odp_timer_ns_to_tick(odp_timer_pool_t tpid,
uint64_t ns)
+{
+ return (odp_timer_tick_t)(ns / tpid->resolution_ns);
+}
- if (odp_timer.num_timers >= NUM_TIMERS) {
- odp_spinlock_unlock(&odp_timer.lock);
- return ODP_TIMER_INVALID;
- }
+odp_timer_tick_t odp_timer_current_tick(odp_timer_pool_t tpid)
+{
+ return tpid->tick;
+}
- for (id = 0; id < NUM_TIMERS; id++) {
- if (odp_timer.timer[id].allocated == 0)
- break;
+uint64_t odp_timer_pool_query_conf(odp_timer_pool_t tpid,
+ odp_timer_pool_conf_t item)
+{
+ switch (item) {
+ case ODP_TIMER_NAME:
+ return (uint64_t)(tpid->name);
+ case ODP_TIMER_RESOLUTION:
+ return tpid->resolution_ns;
+ case ODP_TIMER_MAX_TMO:
+ return tpid->max_timeout;
+ case ODP_TIMER_NUM_TIMERS:
+ return tpid->max_timers;
+ case ODP_TIMER_SHARED:
+ return tpid->shared;
+ default:
+ return 0;
}
+}
- timer = &odp_timer.timer[id];
- timer->allocated = 1;
- odp_timer.num_timers++;
-
- odp_spinlock_unlock(&odp_timer.lock);
-
- timer_hdl = id + 1;
-
- timer->timer_hdl = timer_hdl;
- timer->pool = pool;
- timer->resolution_ns = RESOLUTION_NS;
- timer->max_ticks = MAX_TICKS;
-
- for (i = 0; i < MAX_TICKS; i++) {
- odp_spinlock_init(&timer->tick[i].lock);
- timer->tick[i].list = NULL;
+odp_timer_t odp_timer_alloc(odp_timer_pool_t tpid,
+ odp_queue_t queue,
+ void *user_ptr)
+{
+ /* We check this because ODP_QUEUE_INVALID is used */
+ /* to indicate a free timer */
+ if (odp_unlikely(queue == ODP_QUEUE_INVALID)) {
+ ODP_ERR("%s: Invalid queue identifier\n", tpid->name);
+ abort();
}
-
- timer->active = 1;
- odp_sync_stores();
-
- timer_start(timer);
-
- return timer_hdl;
+ odp_buffer_t tmo_buf = odp_buffer_alloc(tpid->buf_pool);
+ if (odp_likely(tmo_buf != ODP_BUFFER_INVALID)) {
+ odp_timer *tim = timer_alloc(tpid, queue,
user_ptr, tmo_buf);
+ if (tim != ODP_TIMER_INVALID) {
+ /* Success */
+ assert(tim->queue != ODP_QUEUE_INVALID);
+ return tim;
+ }
+ odp_buffer_free(tmo_buf);
+ }
+ /* Else failed to allocate timeout event */
+ /* errno set by odp_buffer_alloc() or timer_alloc () */
+ return ODP_TIMER_INVALID;
}
-odp_timer_tmo_t odp_timer_absolute_tmo(odp_timer_t timer_hdl,
uint64_t tmo_tick,
- odp_queue_t queue,
odp_buffer_t buf)
+void odp_timer_free(odp_timer_t tim)
{
- int id;
- uint64_t tick;
- uint64_t cur_tick;
- timeout_t *new_tmo;
- odp_buffer_t tmo_buf;
- odp_timeout_hdr_t *tmo_hdr;
- timer_ring_t *timer;
-
- id = timer_hdl - 1;
- timer = &odp_timer.timer[id];
-
- cur_tick = timer->cur_tick;
- if (tmo_tick <= cur_tick) {
- ODP_DBG("timeout too close\n");
- return ODP_TIMER_TMO_INVALID;
+ if (odp_unlikely(tim->queue == ODP_QUEUE_INVALID)) {
+ ODP_ERR("Invalid timer %p\n", tim);
+ abort();
}
+ odp_timer_pool *tp = (odp_timer_pool *)get_pq(&tim->pqelem);
+ timer_free(tp, tim);
+}
- tick = tmo_tick - cur_tick;
- if (tick > MAX_TICKS) {
- ODP_DBG("timeout too far\n");
- return ODP_TIMER_TMO_INVALID;
+void odp_timer_set_abs_w_buf(odp_timer_t tim,
+ odp_timer_tick_t abs_tck,
+ odp_buffer_t user_buf)
+{
+ if (odp_unlikely(tim->queue == ODP_QUEUE_INVALID)) {
+ ODP_ERR("Invalid timer %p\n", tim);
+ abort();
}
+ odp_timer_pool *tp = (odp_timer_pool *)get_pq(&tim->pqelem);
+ timer_reset_w_buf(tp, tim, abs_tck, user_buf);
+}
- tick = (cur_tick + tick) % MAX_TICKS;
-
- tmo_buf = odp_buffer_alloc(timer->pool);
- if (tmo_buf == ODP_BUFFER_INVALID) {
- ODP_DBG("alloc failed\n");
- return ODP_TIMER_TMO_INVALID;
+void odp_timer_set_abs(odp_timer_t tim, odp_timer_tick_t abs_tck)
+{
+ if (odp_unlikely(tim->queue == ODP_QUEUE_INVALID)) {
+ ODP_ERR("Invalid timer %p\n", tim);
+ abort();
}
-
- tmo_hdr = odp_timeout_hdr((odp_timeout_t) tmo_buf);
- new_tmo = &tmo_hdr->meta;
-
- new_tmo->timer_id = id;
- new_tmo->tick = (int)tick;
- new_tmo->tmo_tick = tmo_tick;
- new_tmo->queue = queue;
- new_tmo->tmo_buf = tmo_buf;
-
- if (buf != ODP_BUFFER_INVALID)
- new_tmo->buf = buf;
- else
- new_tmo->buf = tmo_buf;
-
- add_tmo(&timer->tick[tick], new_tmo);
-
- return tmo_buf;
+ odp_timer_pool *tp = (odp_timer_pool *)get_pq(&tim->pqelem);
+ timer_reset(tp, tim, abs_tck);
}
-uint64_t odp_timer_tick_to_ns(odp_timer_t timer_hdl, uint64_t ticks)
+void odp_timer_set_rel(odp_timer_t tim, odp_timer_tick_t rel_tck)
{
- uint32_t id;
-
- id = timer_hdl - 1;
- return ticks * odp_timer.timer[id].resolution_ns;
+ if (odp_unlikely(tim->queue == ODP_QUEUE_INVALID)) {
+ ODP_ERR("Invalid timer %p\n", tim);
+ abort();
+ }
+ odp_timer_pool *tp = (odp_timer_pool *)get_pq(&tim->pqelem);
+ timer_reset(tp, tim, tp->tick + rel_tck);
}
-uint64_t odp_timer_ns_to_tick(odp_timer_t timer_hdl, uint64_t ns)
+void odp_timer_cancel(odp_timer_t tim)
{
- uint32_t id;
-
- id = timer_hdl - 1;
- return ns / odp_timer.timer[id].resolution_ns;
+ if (odp_unlikely(tim->queue == ODP_QUEUE_INVALID)) {
+ ODP_ERR("Invalid timer %p\n", tim);
+ abort();
+ }
+ odp_timer_pool *tp = (odp_timer_pool *)get_pq(&tim->pqelem);
+ timer_cancel(tp, tim);
}
-uint64_t odp_timer_resolution(odp_timer_t timer_hdl)
+odp_timer_tmo_status_t odp_timer_tmo_status(odp_timer_tmo_t tmo_buf)
{
- uint32_t id;
+ odp_timeout_hdr_t *tmo_hdr =
+ (odp_timeout_hdr_t *)odp_buf_to_hdr(tmo_buf);
+ odp_timer *tim = tmo_hdr->timer;
+
+ /* Make sure stores to '*tim' are visible */
+ odp_sync_stores();
- id = timer_hdl - 1;
- return odp_timer.timer[id].resolution_ns;
+ /* Compare generation count (gc) of timeout and parent
timer (if any)*/
+ if (odp_unlikely(tim == ODP_TIMER_INVALID ||
+ tmo_hdr->gc != tim->gc)) {
+ /* Generation counters differ => timeout is
orphaned */
+ return ODP_TMO_ORPHAN;
+ }
+ /* Else gen-cnts match => parent timer exists */
+
+ /* Return timeout to timer so that it can be delivered
again */
+ tim->tmo_buf = tmo_buf;
+ /* FIXME do we need some kind of synchronisation or
locking here? */
+
+ /* Compare tags of timeout and parent timer */
+ /* Compare requested and actual timeout time */
+ if (odp_likely(tim->tag == tmo_hdr->tag &&
+ tim->req_tmo <= tmo_hdr->expiration)) {
+ /* Tags match, actual timeout is after requested
=> good! */
+ return ODP_TMO_FRESH;
+ } else {
+ /* Tags don't match or actual timeout time is
before */
+ /* requested */
+ /* Timer has been reset or cancelled and timeout
is stale */
+ /* or timeout expired too early */
+ if (tim->req_tmo != INVALID_PRIORITY) {
+ /* Reset the timer for requested timeout */
+ odp_timer_set_abs(tim, tim->req_tmo);
+ }
+ /* Else timer was cancelled, do nothing */
+ return ODP_TMO_STALE;
+ }
}
-uint64_t odp_timer_maximum_tmo(odp_timer_t timer_hdl)
+odp_timer_t odp_timer_get_handle(odp_timer_tmo_t tmo_buf)
{
- uint32_t id;
-
- id = timer_hdl - 1;
- return odp_timer.timer[id].max_ticks;
+ odp_timeout_hdr_t *tmo_hdr =
+ (odp_timeout_hdr_t *)odp_buf_to_hdr(tmo_buf);
+ odp_timer_t tim = tmo_hdr->timer;
+ if (odp_likely(tim != ODP_TIMER_INVALID && tmo_hdr->gc ==
tim->gc))
+ return tim;
+ else
+ return ODP_TIMER_INVALID;
}
-uint64_t odp_timer_current_tick(odp_timer_t timer_hdl)
+odp_timer_tick_t odp_timer_get_expiry(odp_timer_tmo_t tmo_buf)
{
- uint32_t id;
-
- id = timer_hdl - 1;
- return odp_timer.timer[id].cur_tick;
+ odp_timeout_hdr_t *tmo_hdr =
+ (odp_timeout_hdr_t *)odp_buf_to_hdr(tmo_buf);
+ return tmo_hdr->expiration;
}
-odp_timeout_t odp_timeout_from_buffer(odp_buffer_t buf)
+void *odp_timer_get_userptr(odp_timer_tmo_t tmo_buf)
{
- return (odp_timeout_t) buf;
+ odp_timeout_hdr_t *tmo_hdr =
+ (odp_timeout_hdr_t *)odp_buf_to_hdr(tmo_buf);
+ return tmo_hdr->user_ptr;
}
-uint64_t odp_timeout_tick(odp_timeout_t tmo)
+int odp_timer_init_global(void)
{
- odp_timeout_hdr_t *tmo_hdr = odp_timeout_hdr(tmo);
- return tmo_hdr->meta.tmo_tick;
+ return 0;
}
diff --git a/platform/linux-generic/priority_queue.c
b/platform/linux-generic/priority_queue.c
new file mode 100644
index 0000000..ba4ba0e
--- /dev/null
+++ b/platform/linux-generic/priority_queue.c
@@ -0,0 +1,289 @@
+#define NDEBUG /* Enabled by default by ODP build system */
+#include <assert.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <odp_hints.h>
+#include <odp_align.h>
+#include <odp_debug.h>
+
+#include "priority_queue.h"
+
+
+#define NUM_CHILDREN 4
+#define CHILD(n) (NUM_CHILDREN * (n) + 1)
+#define PARENT(n) (((n) - 1) / NUM_CHILDREN)
+
+/* Internal nodes in the array */
+typedef struct heap_node {
+ pq_element *elem;
+ /* Copy of elem->prio so we avoid unnecessary dereferencing */
+ pq_priority_t prio;
+} heap_node;
+
+static void pq_assert_heap(priority_queue *this);
+
+#define ALIGNMENT(p) (1U << ((unsigned)ffs((int)p) - 1U))
+
+void priority_queue_con(priority_queue *this, uint32_t _max_elems)
+{
+ this->max_elems = _max_elems;
+ this->reg_elems = 0;
+ this->num_elems = 0;
+ this->org_ptr = malloc((_max_elems + 64 / sizeof(heap_node)) *
+ sizeof(heap_node));
+ if (odp_unlikely(this->org_ptr == NULL)) {
+ ODP_ERR("malloc failed\n");
+ abort();
+ }
+ this->heap = this->org_ptr;
+ assert((size_t)&this->heap[1] % 8 == 0);
+ /* Increment base address until first child (index 1) is
cache line */
+ /* aligned and thus all children (e.g. index 1-4) stored
in the */
+ /* same cache line. We are not interested in the alignment
of */
+ /* heap[0] as this is a lone node */
+ while ((size_t)&this->heap[1] % ODP_CACHE_LINE_SIZE != 0) {
+ /* Cast to ptr to struct member with the greatest
alignment */
+ /* requirement */
+ this->heap = (heap_node *)((pq_priority_t
*)this->heap + 1);
+ }
+#if 0
+ printf("Alignment of heap[1]=%u\n",
ALIGNMENT((size_t)&heap[1]));
+ printf("Alignment of heap[CHILD(1)]=%u\n",
+ ALIGNMENT((size_t)&heap[CHILD(1)]));
+#endif
+ pq_assert_heap(this);
+}
+
+void priority_queue_des(priority_queue *this)
+{
+ pq_assert_heap(this);
+ free(this->org_ptr);
+}
+
+#ifndef NDEBUG
+static uint32_t
+pq_assert_elem(priority_queue *this, uint32_t index, bool recurse)
+{
+ uint32_t num = 1;
+ const pq_element *elem = this->heap[index].elem;
+ assert(elem->index == index);
+ assert(elem->prio == this->heap[index].prio);
+ uint32_t child = CHILD(index);
+ uint32_t i;
+ for (i = 0; i < NUM_CHILDREN; i++, child++) {
+ if (valid_index(this, child)) {
+ assert(this->heap[child].elem != NULL);
+ assert(this->heap[child].prio >= elem->prio);
+ if (recurse)
+ num += pq_assert_elem(this, child,
recurse);
+ }
+ }
+ return num;
+}
+#endif
+
+static void
+pq_assert_heap(priority_queue *this)
+{
+ (void)this;
+#ifndef NDEBUG
+ uint32_t num = 0;
+ if (odp_likely(this->num_elems != 0)) {
+ assert(this->heap[0].elem != NULL);
+ num += pq_assert_elem(this, 0, true);
+ }
+ assert(num == this->num_elems);
+ unsigned i;
+ for (i = 0; i < this->num_elems; i++) {
+ assert(this->heap[i].elem != NULL);
+ assert(this->heap[i].prio != INVALID_PRIORITY);
+ }
+#endif
+}
+
+/* Bubble up to proper position */
+void
+pq_bubble_up(priority_queue *this, pq_element *elem)
+{
+ assert(this->heap[elem->index].elem == elem);
+ assert(this->heap[elem->index].prio == elem->prio);
+ uint32_t current = elem->index;
+ pq_priority_t prio = elem->prio;
+ assert(current == 0 || this->heap[PARENT(current)].elem !=
NULL);
+ /* Move up into proper position */
+ while (current != 0 && this->heap[PARENT(current)].prio >
prio) {
+ uint32_t parent = PARENT(current);
+ assert(this->heap[parent].elem != NULL);
+ /* Swap current with parent */
+ /* 1) Move parent down */
+ this->heap[current].elem = this->heap[parent].elem;
+ this->heap[current].prio = this->heap[parent].prio;
+ this->heap[current].elem->index = current;
+ /* 2) Move current up to parent */
+ this->heap[parent].elem = elem;
+ this->heap[parent].prio = prio;
+ this->heap[parent].elem->index = parent;
+ /* Continue moving elem until it is in the right
place */
+ current = parent;
+ }
+ pq_assert_heap(this);
+}
+
+/* Find the smallest child that is smaller than the specified
priority */
+/* TODO very hot function! */
+uint32_t pq_smallest_child(priority_queue *this,
+ uint32_t index,
+ pq_priority_t val)
+{
+ uint32_t smallest = index;
+ uint32_t child = CHILD(index);
+#if 1
+ /* Unroll loop when all children exist */
+ if (odp_likely(valid_index(this, child + 3))) {
+ if (this->heap[child + 0].prio < val)
+ val = this->heap[smallest = child + 0].prio;
+ if (this->heap[child + 1].prio < val)
+ val = this->heap[smallest = child + 1].prio;
+ if (this->heap[child + 2].prio < val)
+ val = this->heap[smallest = child + 2].prio;
+ if (this->heap[child + 3].prio < val)
+ val = this->heap[smallest = child + 3].prio;
+ return smallest;
+ }
+#endif
+ uint32_t i;
+ for (i = 0; i < NUM_CHILDREN; i++) {
+ if (odp_unlikely(!valid_index(this, child + i)))
+ break;
+ if (this->heap[child + i].prio < val) {
+ smallest = child + i;
+ val = this->heap[smallest].prio;
+ }
+ }
+ return smallest;
+}
+
+/* TODO very hot function, can it be optimised? */
+void
+pq_bubble_down(priority_queue *this, pq_element *elem)
+{
+ assert(this->heap[elem->index].elem == elem);
+ assert(this->heap[elem->index].prio == elem->prio);
+ uint32_t current = elem->index;
+ pq_priority_t prio = elem->prio;
+ for (;;) {
+ uint32_t child = pq_smallest_child(this, current,
prio);
+ if (current == child) {
+ /* No smaller child, we are done */
+ pq_assert_heap(this);
+ return;
+ }
+ /* Element larger than smaller child, must move
down */
+ assert(this->heap[child].elem != NULL);
+ /* 1) Move child up to current */
+ this->heap[current].elem = this->heap[child].elem;
+ this->heap[current].prio = this->heap[child].prio;
+ /* 2) Move current down to child */
+ this->heap[child].elem = elem;
+ this->heap[child].prio = prio;
+ this->heap[child].elem->index = child;
+
+ this->heap[current].elem->index = current; /*
cache misses! */
+ /* Continue moving element until it is in the
right place */
+ current = child;
+ }
+}
+
+bool
+pq_register_element(priority_queue *this, pq_element *elem)
+{
+ if (odp_likely(this->reg_elems < this->max_elems)) {
+ elem->pq = this;
+ this->reg_elems++;
+ return true;
+ }
+ return false;
+}
+
+void
+pq_unregister_element(priority_queue *this, pq_element *elem)
+{
+ assert(elem->pq == this);
+ if (is_active(elem))
+ pq_deactivate_element(this, elem);
+ elem->pq = NULL;
+ this->reg_elems--;
+}
+
+void
+pq_activate_element(priority_queue *this, pq_element *elem,
pq_priority_t prio)
+{
+ assert(elem->pq == this);
+ /* Insert element at end */
+ uint32_t index = this->num_elems++;
+ this->heap[index].elem = elem;
+ this->heap[index].prio = prio;
+ elem->index = index;
+ elem->prio = prio;
+ pq_bubble_up(this, elem);
+}
+
+void
+pq_deactivate_element(priority_queue *this, pq_element *elem)
+{
+ assert(elem->pq == this);
+ if (odp_likely(is_active(elem))) {
+ /* Swap element with last element */
+ uint32_t current = elem->index;
+ uint32_t last = --this->num_elems;
+ if (odp_likely(last != current)) {
+ /* Move last element to current */
+ this->heap[current].elem =
this->heap[last].elem;
+ this->heap[current].prio =
this->heap[last].prio;
+ this->heap[current].elem->index = current;
+ /* Bubble down old 'last' element to its
proper place*/
+ if (this->heap[current].prio < elem->prio)
+ pq_bubble_up(this,
this->heap[current].elem);
+ else
+ pq_bubble_down(this,
this->heap[current].elem);
+ }
+ elem->index = INVALID_INDEX;
+ pq_assert_heap(this);
+ }
+}
+
+void
+pq_reset_element(priority_queue *this, pq_element *elem,
pq_priority_t prio)
+{
+ assert(prio != INVALID_PRIORITY);
+ if (odp_likely(is_active(elem))) {
+ assert(prio >= elem->prio);
+ elem->prio = prio;
+ this->heap[elem->index].prio = prio;/* cache
misses here! */
+ pq_bubble_down(this, elem);
+ pq_assert_heap(this);
+ } else {
+ pq_activate_element(this, elem, prio);
+ }
+}
+
+pq_priority_t pq_first_priority(const priority_queue *this)
+{
+ return this->num_elems != 0 ? this->heap[0].prio :
INVALID_PRIORITY;
+}
+
+pq_element *
+pq_release_element(priority_queue *this, pq_priority_t threshold)
+{
+ if (odp_likely(this->num_elems != 0 &&
+ this->heap[0].prio <= threshold)) {
+ pq_element *elem = this->heap[0].elem;
+ /* Remove element from heap */
+ pq_deactivate_element(this, elem);
+ assert(elem->prio <= threshold);
+ return elem;
+ }
+ return NULL;
+}
diff --git a/platform/linux-generic/priority_queue.h
b/platform/linux-generic/priority_queue.h
new file mode 100644
index 0000000..c461590
--- /dev/null
+++ b/platform/linux-generic/priority_queue.h
@@ -0,0 +1,107 @@
+#ifndef _PRIORITY_QUEUE_H
+#define _PRIORITY_QUEUE_H
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define INVALID_INDEX ~0U
+#define INVALID_PRIORITY ((pq_priority_t)~0ULL)
+
+typedef uint64_t pq_priority_t;
+
+struct heap_node;
+
+typedef struct priority_queue {
+ uint32_t max_elems;/* Number of elements in heap */
+ /* Number of registered elements (active + inactive) */
+ uint32_t reg_elems;
+ uint32_t num_elems;/* Number of active elements */
+ struct heap_node *heap;
+ struct heap_node *org_ptr;
+} priority_queue;
+
+/* The user gets a pointer to this structure */
+typedef struct {
+ /* Set when pq_element registered with priority queue */
+ priority_queue *pq;
+ uint32_t index;/* Index into heap array */
+ pq_priority_t prio;
+} pq_element;
+
+/*** Operations on pq_element ***/
+
+static inline void pq_element_con(pq_element *this)
+{
+ this->pq = NULL;
+ this->index = INVALID_INDEX;
+ this->prio = 0U;
+}
+
+static inline void pq_element_des(pq_element *this)
+{
+ (void)this;
+ assert(this->index == INVALID_INDEX);
+}
+
+static inline priority_queue *get_pq(const pq_element *this)
+{
+ return this->pq;
+}
+
+static inline pq_priority_t get_prio(const pq_element *this)
+{
+ return this->prio;
+}
+
+static inline uint32_t get_index(const pq_element *this)
+{
+ return this->index;
+}
+
+static inline bool is_active(const pq_element *this)
+{
+ return this->index != INVALID_INDEX;
+}
+
+/*** Operations on priority_queue ***/
+
+extern uint32_t pq_smallest_child(priority_queue *, uint32_t,
pq_priority_t);
+extern void pq_bubble_down(priority_queue *, pq_element *);
+extern void pq_bubble_up(priority_queue *, pq_element *);
+
+static inline bool valid_index(priority_queue *this, uint32_t idx)
+{
+ return idx < this->num_elems;
+}
+
+extern void priority_queue_con(priority_queue *, uint32_t
_max_elems);
+extern void priority_queue_des(priority_queue *);
+
+/* Register pq_element with priority queue */
+/* Return false if priority queue full */
+extern bool pq_register_element(priority_queue *, pq_element *);
+
+/* Activate and add pq_element to priority queue */
+/* Element must be disarmed */
+extern void pq_activate_element(priority_queue *, pq_element *,
pq_priority_t);
+
+/* Reset (increase) priority for pq_element */
+/* Element may be active or inactive (released) */
+extern void pq_reset_element(priority_queue *, pq_element *,
pq_priority_t);
+
+/* Deactivate and remove element from priority queue */
+/* Element may be active or inactive (released) */
+extern void pq_deactivate_element(priority_queue *, pq_element *);
+
+/* Unregister pq_element */
+extern void pq_unregister_element(priority_queue *, pq_element *);
+
+/* Return priority of first element (lowest numerical value) */
+extern pq_priority_t pq_first_priority(const priority_queue *);
+
+/* Deactivate and return first element if it's prio is <=
threshold */
+extern pq_element *pq_release_element(priority_queue *,
pq_priority_t thresh);
+
+#endif /* _PRIORITY_QUEUE_H */
diff --git a/test/api_test/odp_timer_ping.c
b/test/api_test/odp_timer_ping.c
index c1cc255..c4332e3 100644
--- a/test/api_test/odp_timer_ping.c
+++ b/test/api_test/odp_timer_ping.c
@@ -20,6 +20,7 @@
* Otherwise timeout may happen bcz of slow nw speed
*/
+#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
@@ -43,7 +44,8 @@
#define PING_CNT 10
#define PING_THRD 2 /* Send and Rx Ping thread */
-static odp_timer_t test_timer_ping;
+static odp_timer_pool_t tp;
+static odp_timer_t test_timer_ping = ODP_TIMER_INVALID;
static odp_timer_tmo_t test_ping_tmo;
#define PKTSIZE 64
@@ -123,15 +125,7 @@ static int listen_to_pingack(void)
(socklen_t *)&len);
if (bytes > 0) {
/* pkt rxvd therefore cancel the
timeout */
- if
(odp_timer_cancel_tmo(test_timer_ping,
- test_ping_tmo) != 0) {
- ODP_ERR("cancel_tmo failed
..exiting listner thread\n");
- /* avoid exiting from here
even if tmo
- * failed for current ping,
- * allow subsequent
ping_rx request */
- err = -1;
-
- }
+ odp_timer_cancel(test_timer_ping);
/* cruel bad hack used for sender,
listner ipc..
* euwww.. FIXME ..
*/
@@ -153,7 +147,7 @@ static int send_ping_request(struct
sockaddr_in *addr)
int sd, cnt = 1;
struct packet pckt;
- uint64_t tick;
+ odp_timer_tick_t tick;
odp_queue_t queue;
odp_buffer_t buf;
@@ -179,6 +173,12 @@ static int send_ping_request(struct
sockaddr_in *addr)
/* get the ping queue */
queue = odp_queue_lookup("ping_timer_queue");
+ test_timer_ping = odp_timer_alloc(tp, queue, NULL);
+ if (test_timer_ping == ODP_TIMER_INVALID) {
+ ODP_ERR("Failed to allocate timer.\n");
+ err = -1;
+ goto err;
+ }
for (i = 0; i < PING_CNT; i++) {
/* prepare icmp pkt */
@@ -204,12 +204,10 @@ static int send_ping_request(struct
sockaddr_in *addr)
printf(" icmp_sent msg_cnt %d\n", i);
/* arm the timer */
- tick = odp_timer_current_tick(test_timer_ping);
+ tick = odp_timer_current_tick(tp);
tick += 1000;
- test_ping_tmo =
odp_timer_absolute_tmo(test_timer_ping, tick,
- queue,
- ODP_BUFFER_INVALID);
+ odp_timer_set_abs(test_timer_ping, tick);
/* wait for timeout event */
while ((buf = odp_queue_deq(queue)) ==
ODP_BUFFER_INVALID) {
/* flag true means ack rxvd.. a cruel hack
as I
@@ -225,16 +223,24 @@ static int send_ping_request(struct
sockaddr_in *addr)
}
}
- /* free tmo_buf for timeout case */
- if (buf != ODP_BUFFER_INVALID) {
+ switch (odp_timer_tmo_status(buf)) {
+ case ODP_TMO_FRESH:
ODP_DBG(" timeout msg_cnt [%i] \n", i);
/* so to avoid seg fault commented */
- odp_buffer_free(buf);
err = -1;
+ break;
+ case ODP_TMO_STALE:
+ /* Ignore stale timeouts */
+ break;
+ case ODP_TMO_ORPHAN:
+ ODP_ERR("Received orphaned timeout!\n");
+ abort();
}
}
err:
+ if (test_timer_ping != ODP_TIMER_INVALID)
+ odp_timer_free(test_timer_ping);
return err;
}
@@ -335,7 +341,7 @@ int main(int argc ODP_UNUSED, char *argv[]
ODP_UNUSED)
ODP_CACHE_LINE_SIZE,
ODP_BUFFER_TYPE_RAW);
if (pool == ODP_BUFFER_POOL_INVALID) {
- ODP_ERR("Pool create failed.\n");
+ ODP_ERR("Buffer pool create failed.\n");
return -1;
}
@@ -350,8 +356,18 @@ int main(int argc ODP_UNUSED, char *argv[]
ODP_UNUSED)
return -1;
}
- test_timer_ping = odp_timer_create("ping_timer", pool,
- 1000000, 1000000,
1000000000000UL);
+ /*
+ * Create timer pool
+ */
+ tp = odp_timer_pool_create("timer_pool", pool,
+ 1000000U, /* 1 millisecond */
+ 10000000000U, /* 10 seconds */
+ 1, false, ODP_CLOCK_DEFAULT);
+ if (tp == ODP_TIMER_POOL_INVALID) {
+ ODP_ERR("Timer pool create failed.\n");
+ return -1;
+ }
+
odp_shm_print_all();
pingarg.thrdarg.testcase = ODP_TIMER_PING_TEST;
--
1.9.1
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