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gtask: fix task_wait_time estimation

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The wait time is estimated as function of the number of running threads

Fixes #1683
This commit is contained in:
Ignazio Pillai
2019-02-07 18:03:55 +01:00
parent 01cff0e9b8
commit b465cb158b
1 changed files with 8 additions and 2 deletions
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10
gio/gtask.c
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@@ -619,11 +619,14 @@ static gint tasks_running;
* The base and multiplier below gives us 10 extra threads after about
* a second of blocking, 30 after 5 seconds, 100 after a minute, and
* 200 after 20 minutes.
*
* We specify maximum pool size of 330 to increase the waiting time up
* to around 30 minutes.
*/
#define G_TASK_POOL_SIZE 10
#define G_TASK_WAIT_TIME_BASE 100000
#define G_TASK_WAIT_TIME_MULTIPLIER 1.03
#define G_TASK_WAIT_TIME_MAX (30 * 60 * 1000000)
#define G_TASK_WAIT_TIME_MAX_POOL_SIZE 330
static void
g_task_init (GTask *task)
@@ -1359,7 +1362,7 @@ g_task_thread_setup (void)
if (tasks_running == G_TASK_POOL_SIZE)
task_wait_time = G_TASK_WAIT_TIME_BASE;
else if (tasks_running > G_TASK_POOL_SIZE && task_wait_time < G_TASK_WAIT_TIME_MAX)
else if (tasks_running > G_TASK_POOL_SIZE && tasks_running < G_TASK_WAIT_TIME_MAX_POOL_SIZE)
task_wait_time *= G_TASK_WAIT_TIME_MULTIPLIER;
if (tasks_running >= G_TASK_POOL_SIZE)
@@ -1381,6 +1384,9 @@ g_task_thread_cleanup (void)
else if (tasks_running + tasks_pending < G_TASK_POOL_SIZE)
g_source_set_ready_time (task_pool_manager, -1);
if (tasks_running > G_TASK_POOL_SIZE && tasks_running < G_TASK_WAIT_TIME_MAX_POOL_SIZE)
task_wait_time /= G_TASK_WAIT_TIME_MULTIPLIER;
tasks_running--;
g_mutex_unlock (&task_pool_mutex);
g_private_set (&task_private, GUINT_TO_POINTER (FALSE));