FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-04 22:21:23 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

locking/ww_mutex: Improve test to cover acquire context changes

Browse Source 
Currently each thread starts an acquire context only once, and
performs all its loop iterations under it.

This means that the Wound/Wait relations between threads are fixed.

To make things a little more realistic and cover more of the
functionality with the test, open a new acquire context for each loop.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2017-03-03 13:57:56 +01:00 committed by Ingo Molnar
parent 383776fa75
commit bf7b3ac2e3
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
kernel/locking/test-ww_mutex.c
View File

@ -398,12 +398,11 @@ static void stress_inorder_work(struct work_struct *work)
if (!order)
return;
ww_acquire_init(&ctx, &ww_class);
do {
int contended = -1;
int n, err;
ww_acquire_init(&ctx, &ww_class);
retry:
err = 0;
for (n = 0; n < nlocks; n++) {
@ -433,9 +432,9 @@ retry:
__func__, err);
break;
}
} while (--stress->nloops);
ww_acquire_fini(&ctx);
ww_acquire_fini(&ctx);
} while (--stress->nloops);
kfree(order);
kfree(stress);
@ -470,9 +469,9 @@ static void stress_reorder_work(struct work_struct *work)
kfree(order);
order = NULL;
ww_acquire_init(&ctx, &ww_class);
do {
ww_acquire_init(&ctx, &ww_class);
list_for_each_entry(ll, &locks, link) {
err = ww_mutex_lock(ll->lock, &ctx);
if (!err)
@ -495,9 +494,9 @@ static void stress_reorder_work(struct work_struct *work)
dummy_load(stress);
list_for_each_entry(ll, &locks, link)
ww_mutex_unlock(ll->lock);
} while (--stress->nloops);
ww_acquire_fini(&ctx);
ww_acquire_fini(&ctx);
} while (--stress->nloops);
out:
list_for_each_entry_safe(ll, ln, &locks, link)