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stop threadpool when the memory limit is too low for any worker thread to proceed

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This commit is contained in:
Yatao Li 2022-01-23 04:31:30 +08:00
parent de187eff1c
commit f3674ffa02
1 changed files with 24 additions and 0 deletions
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24
src/tpool.c
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@ -28,6 +28,7 @@ typedef struct tpool {
int work_cnt;
int done_cnt;
int busy_cnt;
int throttle_stuck_cnt;
int free_arg;
int stop;
@ -148,6 +149,8 @@ static size_t _get_total_mem() {
*/
static void *tpool_worker(void *arg) {
tpool_t *pool = arg;
int stuck_notified = 0;
int throttle_ms = 0;
while (1) {
pthread_mutex_lock(&pool->work_mutex);
@ -167,14 +170,34 @@ static void *tpool_worker(void *arg) {
pthread_mutex_unlock(&(pool->work_mutex));
if (work != NULL) {
stuck_notified = 0;
while(!pool->stop && ScanCtx.mem_limit > 0 && _get_total_mem() >= ScanCtx.mem_limit) {
if (!stuck_notified && throttle_ms >= 90000) {
// notify the pool that this thread is stuck.
pthread_mutex_lock(&(pool->work_mutex));
pool->throttle_stuck_cnt += 1;
if (pool->throttle_stuck_cnt == pool->thread_cnt) {
LOG_FATAL("tpool.c", "Throttle memory limit too low, cannot proceed!");
pool->stop = TRUE;
}
pthread_mutex_unlock(&(pool->work_mutex));
stuck_notified = 1;
}
usleep(10000);
throttle_ms += 10;
}
if (pool->stop) {
break;
}
// we are not stuck anymore. cancel our notification.
if (stuck_notified) {
pthread_mutex_lock(&(pool->work_mutex));
pool->throttle_stuck_cnt -= 1;
pthread_mutex_unlock(&(pool->work_mutex));
}
work->func(work->arg);
if (pool->free_arg) {
free(work->arg);
@ -283,6 +306,7 @@ tpool_t *tpool_create(int thread_cnt, void cleanup_func(), int free_arg, int pri
pool->work_cnt = 0;
pool->done_cnt = 0;
pool->busy_cnt = 0;
pool->throttle_stuck_cnt = 0;
pool->stop = FALSE;
pool->free_arg = free_arg;
pool->cleanup_func = cleanup_func;