-----Original Message-----
From: lng-odp [mailto:[email protected]] On Behalf Of EXT
Bill Fischofer
Sent: Friday, October 23, 2015 12:19 AM
To: [email protected]
Subject: [lng-odp] [PATCH] linux-generic: pool: move local caches to pool
Resolve Bug https://bugs.linaro.org/show_bug.cgi?id=1851 by moving local
buffer caches to the pool itself. This enables odp_pool_destroy() to
properly flush all local caches as part of its processing.
Signed-off-by: Bill Fischofer <[email protected]>
---
platform/linux-generic/include/odp_internal.h | 1 +
platform/linux-generic/include/odp_pool_internal.h | 13 ++++++++---
platform/linux-generic/odp_init.c | 5 +++++
platform/linux-generic/odp_pool.c | 25 +++++++++++++++---
----
4 files changed, 33 insertions(+), 11 deletions(-)
diff --git a/platform/linux-generic/include/odp_internal.h
b/platform/linux-generic/include/odp_internal.h
index 6f0050f..010b82f 100644
--- a/platform/linux-generic/include/odp_internal.h
+++ b/platform/linux-generic/include/odp_internal.h
@@ -52,6 +52,7 @@ int odp_shm_term_global(void);
int odp_shm_init_local(void);
int odp_pool_init_global(void);
+int odp_pool_init_local(void);
int odp_pool_term_global(void);
int odp_pool_term_local(void);
diff --git a/platform/linux-generic/include/odp_pool_internal.h
b/platform/linux-generic/include/odp_pool_internal.h
index 136db2c..bb70159 100644
--- a/platform/linux-generic/include/odp_pool_internal.h
+++ b/platform/linux-generic/include/odp_pool_internal.h
@@ -53,9 +53,14 @@ typedef struct _odp_buffer_pool_init_t {
/* Local cache for buffer alloc/free acceleration */
typedef struct local_cache_t {
- odp_buffer_hdr_t *buf_freelist; /* The local cache */
- uint64_t bufallocs; /* Local buffer alloc count */
- uint64_t buffrees; /* Local buffer free count */
+ union {
+ struct {
+ odp_buffer_hdr_t *buf_freelist; /* The local cache */
+ uint64_t bufallocs; /* Local buffer alloc count */
+ uint64_t buffrees; /* Local buffer free count */
+ };
+ uint8_t pad[ODP_CACHE_LINE_SIZE_ROUNDUP(sizeof(uint64_t))];
+ };
} local_cache_t;
/* Use ticketlock instead of spinlock */
@@ -133,6 +138,8 @@ struct pool_entry_s {
uint32_t low_wm;
uint32_t headroom;
uint32_t tailroom;
+
+ local_cache_t local_cache[ODP_CONFIG_MAX_THREADS] ODP_ALIGNED_CACHE;
};
typedef union pool_entry_u {
diff --git a/platform/linux-generic/odp_init.c b/platform/linux-
generic/odp_init.c
index 48d9b20..5e19d86 100644
--- a/platform/linux-generic/odp_init.c
+++ b/platform/linux-generic/odp_init.c
@@ -138,6 +138,11 @@ int odp_init_local(odp_thread_type_t thr_type)
return -1;
}
+ if (odp_pool_init_local()) {
+ ODP_ERR("ODP pool local init failed.\n");
+ return -1;
+ }
+
if (odp_schedule_init_local()) {
ODP_ERR("ODP schedule local init failed.\n");
return -1;
diff --git a/platform/linux-generic/odp_pool.c b/platform/linux-
generic/odp_pool.c
index 30d4b2b..d06a9d4 100644
--- a/platform/linux-generic/odp_pool.c
+++ b/platform/linux-generic/odp_pool.c
@@ -57,8 +57,8 @@ static const char SHM_DEFAULT_NAME[] =
"odp_buffer_pools";
/* Pool entry pointers (for inlining) */
void *pool_entry_ptr[ODP_CONFIG_POOLS];
-/* Local cache for buffer alloc/free acceleration */
-static __thread local_cache_t local_cache[ODP_CONFIG_POOLS];
+/* Cache thread id locally for local cache performance */
+static __thread int local_id;
int odp_pool_init_global(void)
{
@@ -107,6 +107,12 @@ int odp_pool_init_global(void)
return 0;
}
+int odp_pool_init_local(void)
+{
+ local_id = odp_thread_id();
+ return 0;
+}
+
int odp_pool_term_global(void)
{
int i;
@@ -442,6 +448,7 @@ int odp_pool_destroy(odp_pool_t pool_hdl)
{
uint32_t pool_id = pool_handle_to_index(pool_hdl);
pool_entry_t *pool = get_pool_entry(pool_id);
+ int i;
if (pool == NULL)
return -1;
@@ -455,8 +462,9 @@ int odp_pool_destroy(odp_pool_t pool_hdl)
return -1;
}
- /* Make sure local cache is empty */
- flush_cache(&local_cache[pool_id], &pool->s);
+ /* Make sure local caches are empty */
+ for (i = 0; i < ODP_CONFIG_MAX_THREADS; i++)
+ flush_cache(&pool->s.local_cache[i], &pool->s);
/* Call fails if pool has allocated buffers */
if (odp_atomic_load_u32(&pool->s.bufcount) < pool->s.buf_num) {
@@ -485,8 +493,9 @@ odp_buffer_t buffer_alloc(odp_pool_t pool_hdl, size_t
size)
return ODP_BUFFER_INVALID;
/* Try to satisfy request from the local cache */
- buf = (odp_anybuf_t *)(void *)get_local_buf(&local_cache[pool_id],
- &pool->s, totsize);
+ buf = (odp_anybuf_t *)
+ (void *)get_local_buf(&pool->s.local_cache[local_id],
+ &pool->s, totsize);
/* If cache is empty, satisfy request from the pool */
if (odp_unlikely(buf == NULL)) {
@@ -537,7 +546,7 @@ void odp_buffer_free(odp_buffer_t buf)
if (odp_unlikely(pool->s.low_wm_assert))
ret_buf(&pool->s, buf_hdr);
else
- ret_local_buf(&local_cache[pool->s.pool_id], buf_hdr);
+ ret_local_buf(&pool->s.local_cache[local_id], buf_hdr);
}
void _odp_flush_caches(void)
@@ -546,7 +555,7 @@ void _odp_flush_caches(void)
for (i = 0; i < ODP_CONFIG_POOLS; i++) {
pool_entry_t *pool = get_pool_entry(i);
- flush_cache(&local_cache[i], &pool->s);
+ flush_cache(&pool->s.local_cache[local_id], &pool->s);
}
}
--
2.1.4
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