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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-03-10 10:57:33 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-30 09:49:47 +0200 |
| commit | 57dd924e541a98219bf3a508623db2e0c07e75a7 (patch) | |
| tree | 83a9d11d073455d02279c141f6bdf506034a02d6 /kernel | |
| parent | 44fe84459faf1a7781595b7c64cd36daf2f2827d (diff) | |
| download | linux-57dd924e541a98219bf3a508623db2e0c07e75a7.tar.gz linux-57dd924e541a98219bf3a508623db2e0c07e75a7.tar.bz2 linux-57dd924e541a98219bf3a508623db2e0c07e75a7.zip | |
locking/ww-mutex: Limit stress test to 2 seconds
Use a timeout rather than a fixed number of loops to avoid running for
very long periods, such as under the kbuilder VMs.
Reported-by: kernel test robot <xiaolong.ye@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170310105733.6444-1-chris@chris-wilson.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/locking/test-ww_mutex.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index 90d8d8879969..39f56c870051 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/test-ww_mutex.c @@ -353,8 +353,8 @@ static int test_cycle(unsigned int ncpus) struct stress { struct work_struct work; struct ww_mutex *locks; + unsigned long timeout; int nlocks; - int nloops; }; static int *get_random_order(int count) @@ -434,7 +434,7 @@ retry: } ww_acquire_fini(&ctx); - } while (--stress->nloops); + } while (!time_after(jiffies, stress->timeout)); kfree(order); kfree(stress); @@ -496,7 +496,7 @@ static void stress_reorder_work(struct work_struct *work) ww_mutex_unlock(ll->lock); ww_acquire_fini(&ctx); - } while (--stress->nloops); + } while (!time_after(jiffies, stress->timeout)); out: list_for_each_entry_safe(ll, ln, &locks, link) @@ -522,7 +522,7 @@ static void stress_one_work(struct work_struct *work) __func__, err); break; } - } while (--stress->nloops); + } while (!time_after(jiffies, stress->timeout)); kfree(stress); } @@ -532,7 +532,7 @@ static void stress_one_work(struct work_struct *work) #define STRESS_ONE BIT(2) #define STRESS_ALL (STRESS_INORDER | STRESS_REORDER | STRESS_ONE) -static int stress(int nlocks, int nthreads, int nloops, unsigned int flags) +static int stress(int nlocks, int nthreads, unsigned int flags) { struct ww_mutex *locks; int n; @@ -574,7 +574,7 @@ static int stress(int nlocks, int nthreads, int nloops, unsigned int flags) INIT_WORK(&stress->work, fn); stress->locks = locks; stress->nlocks = nlocks; - stress->nloops = nloops; + stress->timeout = jiffies + 2*HZ; queue_work(wq, &stress->work); nthreads--; @@ -618,15 +618,15 @@ static int __init test_ww_mutex_init(void) if (ret) return ret; - ret = stress(16, 2*ncpus, 1<<10, STRESS_INORDER); + ret = stress(16, 2*ncpus, STRESS_INORDER); if (ret) return ret; - ret = stress(16, 2*ncpus, 1<<10, STRESS_REORDER); + ret = stress(16, 2*ncpus, STRESS_REORDER); if (ret) return ret; - ret = stress(4095, hweight32(STRESS_ALL)*ncpus, 1<<12, STRESS_ALL); + ret = stress(4095, hweight32(STRESS_ALL)*ncpus, STRESS_ALL); if (ret) return ret; |