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authorMatthew Wilcox <willy@infradead.org>2016-12-15 02:08:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 03:04:09 +0300
commit847d357635ce4c63b8901ab81333586a0f115fa5 (patch)
tree512d5cb1f6aa8f44a07dbfe8e501297e5b8aebb7 /tools/testing/radix-tree/main.c
parent31023cd66468359790beb046b6808fe0444672a2 (diff)
downloadlinux-847d357635ce4c63b8901ab81333586a0f115fa5.tar.xz
radix tree test suite: track preempt_count
Rather than simply NOP out preempt_enable() and preempt_disable(), keep track of preempt_count and display it regularly in case either the test suite or the code under test is forgetting to balance the enables & disables. Only found a test-case that was forgetting to re-enable preemption, but it's a possibility worth checking. Link: http://lkml.kernel.org/r/1480369871-5271-39-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <willy@infradead.org> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing/radix-tree/main.c')
-rw-r--r--tools/testing/radix-tree/main.c30
1 files changed, 20 insertions, 10 deletions
diff --git a/tools/testing/radix-tree/main.c b/tools/testing/radix-tree/main.c
index daa9010693e8..64ffe67605d4 100644
--- a/tools/testing/radix-tree/main.c
+++ b/tools/testing/radix-tree/main.c
@@ -293,27 +293,36 @@ static void single_thread_tests(bool long_run)
{
int i;
- printf("starting single_thread_tests: %d allocated\n", nr_allocated);
+ printf("starting single_thread_tests: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
multiorder_checks();
- printf("after multiorder_check: %d allocated\n", nr_allocated);
+ printf("after multiorder_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
locate_check();
- printf("after locate_check: %d allocated\n", nr_allocated);
+ printf("after locate_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
tag_check();
- printf("after tag_check: %d allocated\n", nr_allocated);
+ printf("after tag_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
gang_check();
- printf("after gang_check: %d allocated\n", nr_allocated);
+ printf("after gang_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
add_and_check();
- printf("after add_and_check: %d allocated\n", nr_allocated);
+ printf("after add_and_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
dynamic_height_check();
- printf("after dynamic_height_check: %d allocated\n", nr_allocated);
+ printf("after dynamic_height_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
big_gang_check(long_run);
- printf("after big_gang_check: %d allocated\n", nr_allocated);
+ printf("after big_gang_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
for (i = 0; i < (long_run ? 2000 : 3); i++) {
copy_tag_check();
printf("%d ", i);
fflush(stdout);
}
- printf("after copy_tag_check: %d allocated\n", nr_allocated);
+ printf("after copy_tag_check: %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
}
int main(int argc, char **argv)
@@ -336,7 +345,8 @@ int main(int argc, char **argv)
single_thread_tests(long_run);
sleep(1);
- printf("after sleep(1): %d allocated\n", nr_allocated);
+ printf("after sleep(1): %d allocated, preempt %d\n",
+ nr_allocated, preempt_count);
rcu_unregister_thread();
exit(0);