From: Petri Savolainen <petri.savolai...@linaro.org> Move stash variables into a struct. Use only 16 bits for thread id, which is enough for 64k threads.
Signed-off-by: Petri Savolainen <petri.savolai...@linaro.org> --- /** Email created from pull request 699 (psavol:master-sched-optim-clean-ups) ** https://github.com/Linaro/odp/pull/699 ** Patch: https://github.com/Linaro/odp/pull/699.patch ** Base sha: 33fbc04b6373960ec3f84de4e7e7b34c49d71508 ** Merge commit sha: 32d7a11f22e6f2e1e378b653993c5377d4116d8f **/ platform/linux-generic/odp_schedule_basic.c | 62 ++++++++++++--------- 1 file changed, 35 insertions(+), 27 deletions(-) diff --git a/platform/linux-generic/odp_schedule_basic.c b/platform/linux-generic/odp_schedule_basic.c index e329a8e8c..89c0a5c42 100644 --- a/platform/linux-generic/odp_schedule_basic.c +++ b/platform/linux-generic/odp_schedule_basic.c @@ -84,6 +84,10 @@ ODP_STATIC_ASSERT(CHECK_IS_POWER2(ODP_CONFIG_QUEUES), ODP_STATIC_ASSERT(CHECK_IS_POWER2(MAX_RING_SIZE), "Ring_size_is_not_power_of_two"); +/* Thread ID is saved into uint16_t variable */ +ODP_STATIC_ASSERT(ODP_THREAD_COUNT_MAX < (64 * 1024), + "Max_64k_threads_supported"); + /* Mask of queues per priority */ typedef uint8_t pri_mask_t; @@ -118,19 +122,22 @@ ODP_STATIC_ASSERT(sizeof(lock_called_t) == sizeof(uint32_t), "Lock_called_values_do_not_fit_in_uint32"); /* Scheduler local data */ -typedef struct { - int thr; - uint16_t stash_num; - uint16_t stash_index; +typedef struct ODP_ALIGNED_CACHE { + uint16_t thr; + uint16_t pause; uint16_t grp_round; uint16_t spread_round; - uint32_t stash_qi; - odp_queue_t stash_queue; - odp_event_t stash_ev[BURST_SIZE_MAX]; + + struct { + uint16_t num_ev; + uint16_t ev_index; + uint32_t qi; + odp_queue_t queue; + odp_event_t ev[BURST_SIZE_MAX]; + } stash; uint32_t grp_epoch; uint16_t num_grp; - uint16_t pause; uint8_t grp[NUM_SCHED_GRPS]; uint8_t spread_tbl[SPREAD_TBL_SIZE]; uint8_t grp_weight[GRP_WEIGHT_TBL_SIZE]; @@ -304,8 +311,8 @@ static void sched_local_init(void) memset(&sched_local, 0, sizeof(sched_local_t)); sched_local.thr = odp_thread_id(); - sched_local.stash_queue = ODP_QUEUE_INVALID; - sched_local.stash_qi = PRIO_QUEUE_EMPTY; + sched_local.stash.queue = ODP_QUEUE_INVALID; + sched_local.stash.qi = PRIO_QUEUE_EMPTY; sched_local.ordered.src_queue = NULL_INDEX; spread = prio_spread_index(sched_local.thr); @@ -445,7 +452,7 @@ static int schedule_init_local(void) static int schedule_term_local(void) { - if (sched_local.stash_num) { + if (sched_local.stash.num_ev) { ODP_ERR("Locally pre-scheduled events exist.\n"); return -1; } @@ -618,9 +625,9 @@ static void schedule_pktio_start(int pktio_index, int num_pktin, static void schedule_release_atomic(void) { - uint32_t qi = sched_local.stash_qi; + uint32_t qi = sched_local.stash.qi; - if (qi != PRIO_QUEUE_EMPTY && sched_local.stash_num == 0) { + if (qi != PRIO_QUEUE_EMPTY && sched_local.stash.num_ev == 0) { int grp = sched->queue[qi].grp; int prio = sched->queue[qi].prio; int spread = sched->queue[qi].spread; @@ -629,7 +636,7 @@ static void schedule_release_atomic(void) /* Release current atomic queue */ ring_enq(ring, sched->ring_mask, qi); - sched_local.stash_qi = PRIO_QUEUE_EMPTY; + sched_local.stash.qi = PRIO_QUEUE_EMPTY; } } @@ -717,7 +724,8 @@ static void schedule_release_ordered(void) queue_index = sched_local.ordered.src_queue; - if (odp_unlikely((queue_index == NULL_INDEX) || sched_local.stash_num)) + if (odp_unlikely((queue_index == NULL_INDEX) || + sched_local.stash.num_ev)) return; release_ordered(); @@ -735,10 +743,10 @@ static inline int copy_from_stash(odp_event_t out_ev[], unsigned int max) { int i = 0; - while (sched_local.stash_num && max) { - out_ev[i] = sched_local.stash_ev[sched_local.stash_index]; - sched_local.stash_index++; - sched_local.stash_num--; + while (sched_local.stash.num_ev && max) { + out_ev[i] = sched_local.stash.ev[sched_local.stash.ev_index]; + sched_local.stash.ev_index++; + sched_local.stash.num_ev--; max--; i++; } @@ -889,7 +897,7 @@ static inline int do_schedule_grp(odp_queue_t *out_queue, odp_event_t out_ev[], int pktin; unsigned int max_deq = max_burst; int stashed = 1; - odp_event_t *ev_tbl = sched_local.stash_ev; + odp_event_t *ev_tbl = sched_local.stash.ev; if (id >= num_spread) id = 0; @@ -984,7 +992,7 @@ static inline int do_schedule_grp(odp_queue_t *out_queue, odp_event_t out_ev[], } else if (queue_is_atomic(qi)) { /* Hold queue during atomic access */ - sched_local.stash_qi = qi; + sched_local.stash.qi = qi; } else { /* Continue scheduling the queue */ ring_enq(ring, ring_mask, qi); @@ -993,12 +1001,12 @@ static inline int do_schedule_grp(odp_queue_t *out_queue, odp_event_t out_ev[], handle = queue_from_index(qi); if (stashed) { - sched_local.stash_num = num; - sched_local.stash_index = 0; - sched_local.stash_queue = handle; + sched_local.stash.num_ev = num; + sched_local.stash.ev_index = 0; + sched_local.stash.queue = handle; ret = copy_from_stash(out_ev, max_num); } else { - sched_local.stash_num = 0; + sched_local.stash.num_ev = 0; ret = num; } @@ -1025,11 +1033,11 @@ static inline int do_schedule(odp_queue_t *out_queue, odp_event_t out_ev[], uint16_t spread_round, grp_round; uint32_t epoch; - if (sched_local.stash_num) { + if (sched_local.stash.num_ev) { ret = copy_from_stash(out_ev, max_num); if (out_queue) - *out_queue = sched_local.stash_queue; + *out_queue = sched_local.stash.queue; return ret; }
