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authorDavidlohr Bueso <dave@stgolabs.net>2017-09-09 02:14:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-09 04:26:48 +0300
commit977bd8d5e1e61dc877c468e8937a4ab3094e53eb (patch)
tree686fec5f47d38fe03b729934ae02f282bf1a556b /lib
parent223f8911eace60c787f8767c25148b80ece9732a (diff)
downloadlinux-977bd8d5e1e61dc877c468e8937a4ab3094e53eb.tar.xz
lib/rbtree_test.c: add (inorder) traversal test
This adds a second test for regular rb-tree testing in that there is no need to repeat it for the augmented flavor. Link: http://lkml.kernel.org/r/20170719014603.19029-6-dave@stgolabs.net Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/rbtree_test.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/lib/rbtree_test.c b/lib/rbtree_test.c
index e83331aa1b7f..967999ff46db 100644
--- a/lib/rbtree_test.c
+++ b/lib/rbtree_test.c
@@ -183,6 +183,7 @@ static int __init rbtree_test_init(void)
{
int i, j;
cycles_t time1, time2, time;
+ struct rb_node *node;
nodes = kmalloc(nnodes * sizeof(*nodes), GFP_KERNEL);
if (!nodes)
@@ -206,8 +207,28 @@ static int __init rbtree_test_init(void)
time = time2 - time1;
time = div_u64(time, perf_loops);
- printk(" -> %llu cycles\n", (unsigned long long)time);
+ printk(" -> test 1 (latency of nnodes insert+delete): %llu cycles\n", (unsigned long long)time);
+ for (i = 0; i < nnodes; i++)
+ insert(nodes + i, &root);
+
+ time1 = get_cycles();
+
+ for (i = 0; i < perf_loops; i++) {
+ for (node = rb_first(&root); node; node = rb_next(node))
+ ;
+ }
+
+ time2 = get_cycles();
+ time = time2 - time1;
+
+ time = div_u64(time, perf_loops);
+ printk(" -> test 2 (latency of inorder traversal): %llu cycles\n", (unsigned long long)time);
+
+ for (i = 0; i < nnodes; i++)
+ erase(nodes + i, &root);
+
+ /* run checks */
for (i = 0; i < check_loops; i++) {
init();
for (j = 0; j < nnodes; j++) {
@@ -238,7 +259,7 @@ static int __init rbtree_test_init(void)
time = time2 - time1;
time = div_u64(time, perf_loops);
- printk(" -> %llu cycles\n", (unsigned long long)time);
+ printk(" -> test 1 (latency of nnodes insert+delete): %llu cycles\n", (unsigned long long)time);
for (i = 0; i < check_loops; i++) {
init();