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radix tree test suite: use rcu_barrier 

Calling rcu_barrier() allows all of the rcu-freed memory to be actually
returned to the pool, and allows nr_allocated to return to 0.  As well
as allowing diffs between runs to be more useful, it also lets us
pinpoint leaks more effectively.

Link: http://lkml.kernel.org/r/1480369871-5271-44-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
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>
This commit is contained in:
Matthew Wilcox 2016-12-14 15:08:17 -08:00 committed by Linus Torvalds
parent cfa40bcfd6
commit af1c5cca90
2 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/testing/radix-tree/main.c
View File

@ -295,24 +295,31 @@ static void single_thread_tests(bool long_run)
printf("starting single_thread_tests: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
multiorder_checks();
rcu_barrier();
printf("after multiorder_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
locate_check();
rcu_barrier();
printf("after locate_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
tag_check();
rcu_barrier();
printf("after tag_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
gang_check();
rcu_barrier();
printf("after gang_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
add_and_check();
rcu_barrier();
printf("after add_and_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
dynamic_height_check();
rcu_barrier();
printf("after dynamic_height_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
big_gang_check(long_run);
rcu_barrier();
printf("after big_gang_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
for (i = 0; i < (long_run ? 2000 : 3); i++) {
@ -320,6 +327,7 @@ static void single_thread_tests(bool long_run)
printf("%d ", i);
fflush(stdout);
}
rcu_barrier();
printf("after copy_tag_check: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
}
@ -354,8 +362,8 @@ int main(int argc, char **argv)
benchmark();
sleep(1);
printf("after sleep(1): %d allocated, preempt %d\n",
rcu_barrier();
printf("after rcu_barrier: %d allocated, preempt %d\n",
nr_allocated, preempt_count);
rcu_unregister_thread();

5
tools/testing/radix-tree/tag_check.c
View File

@ -51,6 +51,7 @@ void simple_checks(void)
verify_tag_consistency(&tree, 1);
printf("before item_kill_tree: %d allocated\n", nr_allocated);
item_kill_tree(&tree);
rcu_barrier();
printf("after item_kill_tree: %d allocated\n", nr_allocated);
}
@ -331,12 +332,16 @@ void tag_check(void)
single_check();
extend_checks();
contract_checks();
rcu_barrier();
printf("after extend_checks: %d allocated\n", nr_allocated);
__leak_check();
leak_check();
rcu_barrier();
printf("after leak_check: %d allocated\n", nr_allocated);
simple_checks();
rcu_barrier();
printf("after simple_checks: %d allocated\n", nr_allocated);
thrash_tags();
rcu_barrier();
printf("after thrash_tags: %d allocated\n", nr_allocated);
}