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event: Save thread stats to last_stats field in spdk_lw_thread structure

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This field will be used in upcoming patches
by scheduler to keep a history of threads
statistics. Base on those scheduler will
be able to calculate how busy a thread is.

Also we have to save the value of this field
while rescheduling thread.

Signed-off-by: Maciej Szwed <maciej.szwed@intel.com>
Change-Id: Iffbd1f946e1d159ec7277a39bc30161e71722456
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5972
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
This commit is contained in:
Maciej Szwed 2021-01-18 22:18:34 +01:00 committed by Tomasz Zawadzki
parent aa22321aca
commit 80a13be9f5
2 changed files with 4 additions and 0 deletions
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1
include/spdk_internal/event.h
View File

@ -68,6 +68,7 @@ struct spdk_lw_thread {
bool resched;
struct spdk_thread_stats current_stats;
struct spdk_thread_stats snapshot_stats;
struct spdk_thread_stats last_stats;
};
struct spdk_reactor {

3
lib/event/reactor.c
View File

@ -910,6 +910,7 @@ _reactor_schedule_thread(struct spdk_thread *thread)
{
uint32_t core;
struct spdk_lw_thread *lw_thread;
struct spdk_thread_stats last_stats;
struct spdk_event *evt = NULL;
struct spdk_cpuset *cpumask;
uint32_t i;
@ -919,7 +920,9 @@ _reactor_schedule_thread(struct spdk_thread *thread)
lw_thread = spdk_thread_get_ctx(thread);
assert(lw_thread != NULL);
core = lw_thread->lcore;
last_stats = lw_thread->last_stats;
memset(lw_thread, 0, sizeof(*lw_thread));
lw_thread->last_stats = last_stats;
pthread_mutex_lock(&g_scheduler_mtx);
if (core == SPDK_ENV_LCORE_ID_ANY) {