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Use tsd to store tq for taskq_member

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To prevent taskq_member holding tq_lock and doing linear search, thus causing
contention. We store the taskq pointer to which the thread belongs in tsd.
This way taskq_member will not need to touch tq_lock, and tsd has per slot
spinlock. So the contention should be reduced greatly.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #500
Closes #504
Closes #505
This commit is contained in:
Chunwei Chen
2015-12-02 14:52:46 -08:00
committed by Brian Behlendorf
parent de77e24590
commit 16522ac290
5 changed files with 64 additions and 58 deletions
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include/sys/taskq.h
+1 -1
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@@ -140,7 +140,7 @@ extern void taskq_wait_id(taskq_t *, taskqid_t);
extern void taskq_wait_outstanding(taskq_t *, taskqid_t);
extern void taskq_wait(taskq_t *);
extern int taskq_cancel_id(taskq_t *, taskqid_t);
extern int taskq_member(taskq_t *, void *);
extern int taskq_member(taskq_t *, kthread_t *);
#define taskq_create_proc(name, nthreads, pri, min, max, proc, flags) \
taskq_create(name, nthreads, pri, min, max, flags)
include/sys/tsd.h
+1
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@@ -35,6 +35,7 @@ typedef void (*dtor_func_t)(void *);
extern int tsd_set(uint_t, void *);
extern void *tsd_get(uint_t);
extern void *tsd_get_by_thread(uint_t, kthread_t *);
extern void tsd_create(uint_t *, dtor_func_t);
extern void tsd_destroy(uint_t *);
extern void tsd_exit(void);