Add a mallctl speed stress test.

test/stress/mallctl.c

@@ -0,0 +1,74 @@
+#include "test/jemalloc_test.h"
+#include "test/bench.h"
+
+static void
+mallctl_short(void) {
+	const char *version;
+	size_t sz = sizeof(version);
+	int err = mallctl("version", &version, &sz, NULL, 0);
+	assert_d_eq(err, 0, "mallctl failure");
+}
+
+size_t mib_short[1];
+
+static void
+mallctlbymib_short(void) {
+	size_t miblen = sizeof(mib_short)/sizeof(mib_short[0]);
+	const char *version;
+	size_t sz = sizeof(version);
+	int err = mallctlbymib(mib_short, miblen, &version, &sz, NULL, 0);
+	assert_d_eq(err, 0, "mallctlbymib failure");
+}
+
+TEST_BEGIN(test_mallctl_vs_mallctlbymib_short) {
+	size_t miblen = sizeof(mib_short)/sizeof(mib_short[0]);
+
+	int err = mallctlnametomib("version", mib_short, &miblen);
+	assert_d_eq(err, 0, "mallctlnametomib failure");
+	compare_funcs(10*1000*1000, 10*1000*1000, "mallctl_short",
+	    mallctl_short, "mallctlbymib_short", mallctlbymib_short);
+}
+TEST_END
+
+static void
+mallctl_long(void) {
+	uint64_t nmalloc;
+	size_t sz = sizeof(nmalloc);
+	int err = mallctl("stats.arenas.0.bins.0.nmalloc", &nmalloc, &sz, NULL,
+	    0);
+	assert_d_eq(err, 0, "mallctl failure");
+}
+
+size_t mib_long[6];
+
+static void
+mallctlbymib_long(void) {
+	size_t miblen = sizeof(mib_long)/sizeof(mib_long[0]);
+	const char *version;
+	size_t sz = sizeof(version);
+	int err = mallctlbymib(mib_long, miblen, &version, &sz, NULL, 0);
+	assert_d_eq(err, 0, "mallctlbymib failure");
+}
+
+TEST_BEGIN(test_mallctl_vs_mallctlbymib_long) {
+	/*
+	 * We want to use the longest mallctl we have; that needs stats support
+	 * to be allowed.
+	 */
+	test_skip_if(!config_stats);
+
+	size_t miblen = sizeof(mib_long)/sizeof(mib_long[0]);
+	int err = mallctlnametomib("stats.arenas.0.bins.0.nmalloc", mib_long,
+	    &miblen);
+	assert_d_eq(err, 0, "mallctlnametomib failure");
+	compare_funcs(10*1000*1000, 10*1000*1000, "mallctl_long",
+	    mallctl_long, "mallctlbymib_long", mallctlbymib_long);
+}
+TEST_END
+
+int
+main(void) {
+	return test_no_reentrancy(
+	    test_mallctl_vs_mallctlbymib_short,
+	    test_mallctl_vs_mallctlbymib_long);
+}