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| author |   Joel Fernandes (Google) <joel@joelfernandes.org> | 2020-03-16 12:32:26 -0400 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2020-04-27 11:02:50 -0700 |
| commit | f87dc808009ac86c790031627698ef1a34c31e25 (patch) | |
| tree | c8f820cfbd99a779b05125d69ed3105dfa8a14b7 /kernel/rcu | |
| parent | rcu: Add KCSAN stubs (diff) | |
| download | linux-dev-f87dc808009ac86c790031627698ef1a34c31e25.tar.xz linux-dev-f87dc808009ac86c790031627698ef1a34c31e25.zip | |
rcuperf: Add ability to increase object allocation size
This allows us to increase memory pressure dynamically using a new
rcuperf boot command line parameter called 'rcumult'.
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcuperf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index a4a8d097d84d..16dd1e6b7c09 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -88,6 +88,7 @@ torture_param(bool, shutdown, RCUPERF_SHUTDOWN, torture_param(int, verbose, 1, "Enable verbose debugging printk()s"); torture_param(int, writer_holdoff, 0, "Holdoff (us) between GPs, zero to disable"); torture_param(int, kfree_rcu_test, 0, "Do we run a kfree_rcu() perf test?"); +torture_param(int, kfree_mult, 1, "Multiple of kfree_obj size to allocate."); static char *perf_type = "rcu"; module_param(perf_type, charp, 0444); @@ -635,7 +636,7 @@ kfree_perf_thread(void *arg) } for (i = 0; i < kfree_alloc_num; i++) { - alloc_ptr = kmalloc(sizeof(struct kfree_obj), GFP_KERNEL); + alloc_ptr = kmalloc(kfree_mult * sizeof(struct kfree_obj), GFP_KERNEL); if (!alloc_ptr) return -ENOMEM; @@ -722,6 +723,8 @@ kfree_perf_init(void) schedule_timeout_uninterruptible(1); } + pr_alert("kfree object size=%lu\n", kfree_mult * sizeof(struct kfree_obj)); + kfree_reader_tasks = kcalloc(kfree_nrealthreads, sizeof(kfree_reader_tasks[0]), GFP_KERNEL); if (kfree_reader_tasks == NULL) { |