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authorMatthew Wilcox <mawilcox@microsoft.com>2016-12-15 02:09:10 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 03:04:10 +0300
commit3e3cdc68bede179a957fcd6be7b833a83df4e5de (patch)
tree8ae1c50d586265c06d5d7ac58e1df08d0c409740 /tools/testing/radix-tree/iteration_check.c
parenta90eb3a2a405cf7e96093ed531a285067dfdbc9d (diff)
downloadlinux-3e3cdc68bede179a957fcd6be7b833a83df4e5de.tar.xz
radix tree test suite: check multiorder iteration
The random iteration test only inserts order-0 entries currently. Update it to insert entries of order between 7 and 0. Also make the maximum index configurable, make some variables static, make the test duration variable, remove some useless spinning, and add a fifth thread which calls tag_tagged_items(). Link: http://lkml.kernel.org/r/1480369871-5271-62-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>
Diffstat (limited to 'tools/testing/radix-tree/iteration_check.c')
-rw-r--r--tools/testing/radix-tree/iteration_check.c80
1 files changed, 47 insertions, 33 deletions
diff --git a/tools/testing/radix-tree/iteration_check.c b/tools/testing/radix-tree/iteration_check.c
index f328a66899b4..7572b7ed930e 100644
--- a/tools/testing/radix-tree/iteration_check.c
+++ b/tools/testing/radix-tree/iteration_check.c
@@ -16,26 +16,36 @@
#include <pthread.h>
#include "test.h"
-#define NUM_THREADS 4
-#define TAG 0
+#define NUM_THREADS 5
+#define MAX_IDX 100
+#define TAG 0
+#define NEW_TAG 1
+
static pthread_mutex_t tree_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_t threads[NUM_THREADS];
static unsigned int seeds[3];
-RADIX_TREE(tree, GFP_KERNEL);
-bool test_complete;
+static RADIX_TREE(tree, GFP_KERNEL);
+static bool test_complete;
+static int max_order;
/* relentlessly fill the tree with tagged entries */
static void *add_entries_fn(void *arg)
{
- int pgoff;
-
rcu_register_thread();
while (!test_complete) {
- for (pgoff = 0; pgoff < 100; pgoff++) {
+ unsigned long pgoff;
+ int order;
+
+ for (pgoff = 0; pgoff < MAX_IDX; pgoff++) {
pthread_mutex_lock(&tree_lock);
- if (item_insert(&tree, pgoff) == 0)
- item_tag_set(&tree, pgoff, TAG);
+ for (order = max_order; order >= 0; order--) {
+ if (item_insert_order(&tree, pgoff, order)
+ == 0) {
+ item_tag_set(&tree, pgoff, TAG);
+ break;
+ }
+ }
pthread_mutex_unlock(&tree_lock);
}
}
@@ -62,14 +72,7 @@ static void *tagged_iteration_fn(void *arg)
while (!test_complete) {
rcu_read_lock();
radix_tree_for_each_tagged(slot, &tree, &iter, 0, TAG) {
- void *entry;
- int i;
-
- /* busy wait to let removals happen */
- for (i = 0; i < 1000000; i++)
- ;
-
- entry = radix_tree_deref_slot(slot);
+ void *entry = radix_tree_deref_slot(slot);
if (unlikely(!entry))
continue;
@@ -110,14 +113,7 @@ static void *untagged_iteration_fn(void *arg)
while (!test_complete) {
rcu_read_lock();
radix_tree_for_each_slot(slot, &tree, &iter, 0) {
- void *entry;
- int i;
-
- /* busy wait to let removals happen */
- for (i = 0; i < 1000000; i++)
- ;
-
- entry = radix_tree_deref_slot(slot);
+ void *entry = radix_tree_deref_slot(slot);
if (unlikely(!entry))
continue;
@@ -152,7 +148,7 @@ static void *remove_entries_fn(void *arg)
while (!test_complete) {
int pgoff;
- pgoff = rand_r(&seeds[2]) % 100;
+ pgoff = rand_r(&seeds[2]) % MAX_IDX;
pthread_mutex_lock(&tree_lock);
item_delete(&tree, pgoff);
@@ -164,36 +160,54 @@ static void *remove_entries_fn(void *arg)
return NULL;
}
+static void *tag_entries_fn(void *arg)
+{
+ rcu_register_thread();
+
+ while (!test_complete) {
+ tag_tagged_items(&tree, &tree_lock, 0, MAX_IDX, 10, TAG,
+ NEW_TAG);
+ }
+ rcu_unregister_thread();
+ return NULL;
+}
+
/* This is a unit test for a bug found by the syzkaller tester */
-void iteration_test(void)
+void iteration_test(unsigned order, unsigned test_duration)
{
int i;
- printf("Running iteration tests for 10 seconds\n");
+ printf("Running %siteration tests for %d seconds\n",
+ order > 0 ? "multiorder " : "", test_duration);
+ max_order = order;
test_complete = false;
for (i = 0; i < 3; i++)
seeds[i] = rand();
if (pthread_create(&threads[0], NULL, tagged_iteration_fn, NULL)) {
- perror("pthread_create");
+ perror("create tagged iteration thread");
exit(1);
}
if (pthread_create(&threads[1], NULL, untagged_iteration_fn, NULL)) {
- perror("pthread_create");
+ perror("create untagged iteration thread");
exit(1);
}
if (pthread_create(&threads[2], NULL, add_entries_fn, NULL)) {
- perror("pthread_create");
+ perror("create add entry thread");
exit(1);
}
if (pthread_create(&threads[3], NULL, remove_entries_fn, NULL)) {
- perror("pthread_create");
+ perror("create remove entry thread");
+ exit(1);
+ }
+ if (pthread_create(&threads[4], NULL, tag_entries_fn, NULL)) {
+ perror("create tag entry thread");
exit(1);
}
- sleep(10);
+ sleep(test_duration);
test_complete = true;
for (i = 0; i < NUM_THREADS; i++) {