Make test/unit/background_thread_enable more conservative.
To avoid resource exhaustion on 32-bit platforms.
diff --git a/test/unit/background_thread_enable.c b/test/unit/background_thread_enable.c
index 46776f3..44034ac 100644
--- a/test/unit/background_thread_enable.c
+++ b/test/unit/background_thread_enable.c
@@ -2,12 +2,8 @@
const char *malloc_conf = "background_thread:false,narenas:1,max_background_threads:20";
-TEST_BEGIN(test_deferred) {
- test_skip_if(!have_background_thread);
-
- unsigned id;
- size_t sz_u = sizeof(unsigned);
-
+static unsigned
+max_test_narenas(void) {
/*
* 10 here is somewhat arbitrary, except insofar as we want to ensure
* that the number of background threads is smaller than the number of
@@ -15,7 +11,22 @@
* cpu to handle background purging, so this is a conservative
* approximation.
*/
- for (unsigned i = 0; i < 10 * ncpus; i++) {
+ unsigned ret = 10 * ncpus;
+ /* Limit the max to avoid VM exhaustion on 32-bit . */
+ if (ret > 512) {
+ ret = 512;
+ }
+
+ return ret;
+}
+
+TEST_BEGIN(test_deferred) {
+ test_skip_if(!have_background_thread);
+
+ unsigned id;
+ size_t sz_u = sizeof(unsigned);
+
+ for (unsigned i = 0; i < max_test_narenas(); i++) {
expect_d_eq(mallctl("arenas.create", &id, &sz_u, NULL, 0), 0,
"Failed to create arena");
}
@@ -50,7 +61,7 @@
unsigned id;
size_t sz_u = sizeof(unsigned);
- for (unsigned i = 0; i < 10 * ncpus; i++) {
+ for (unsigned i = 0; i < max_test_narenas(); i++) {
expect_d_eq(mallctl("arenas.create", &id, &sz_u, NULL, 0), 0,
"Failed to create arena");
}
