Add a benchmark of large allocations.

This commit is contained in:
David Goldblatt 2020-04-28 12:18:36 -07:00 committed by David Goldblatt
parent 46471ea327
commit 2c09d43494
4 changed files with 74 additions and 40 deletions

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@ -289,6 +289,7 @@ CPP_SRCS :=
TESTS_INTEGRATION_CPP := TESTS_INTEGRATION_CPP :=
endif endif
TESTS_STRESS := $(srcroot)test/stress/microbench.c \ TESTS_STRESS := $(srcroot)test/stress/microbench.c \
$(srcroot)test/stress/large_microbench.c \
$(srcroot)test/stress/hookbench.c $(srcroot)test/stress/hookbench.c

39
test/include/test/bench.h Normal file
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@ -0,0 +1,39 @@
static inline void
time_func(timedelta_t *timer, uint64_t nwarmup, uint64_t niter,
void (*func)(void)) {
uint64_t i;
for (i = 0; i < nwarmup; i++) {
func();
}
timer_start(timer);
for (i = 0; i < niter; i++) {
func();
}
timer_stop(timer);
}
static inline void
compare_funcs(uint64_t nwarmup, uint64_t niter, const char *name_a,
void (*func_a), const char *name_b, void (*func_b)) {
timedelta_t timer_a, timer_b;
char ratio_buf[6];
void *p;
p = mallocx(1, 0);
if (p == NULL) {
test_fail("Unexpected mallocx() failure");
return;
}
time_func(&timer_a, nwarmup, niter, func_a);
time_func(&timer_b, nwarmup, niter, func_b);
timer_ratio(&timer_a, &timer_b, ratio_buf, sizeof(ratio_buf));
malloc_printf("%"FMTu64" iterations, %s=%"FMTu64"us, "
"%s=%"FMTu64"us, ratio=1:%s\n",
niter, name_a, timer_usec(&timer_a), name_b, timer_usec(&timer_b),
ratio_buf);
dallocx(p, 0);
}

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@ -0,0 +1,33 @@
#include "test/jemalloc_test.h"
#include "test/bench.h"
static void
large_mallocx_free(void) {
/*
* We go a bit larger than the large minclass on its own to better
* expose costs from things like zeroing.
*/
void *p = mallocx(SC_LARGE_MINCLASS, MALLOCX_TCACHE_NONE);
assert_ptr_not_null(p, "mallocx shouldn't fail");
free(p);
}
static void
small_mallocx_free(void) {
void *p = mallocx(16, 0);
assert_ptr_not_null(p, "mallocx shouldn't fail");
free(p);
}
TEST_BEGIN(test_large_vs_small) {
compare_funcs(100*1000, 1*1000*1000, "large mallocx",
large_mallocx_free, "small mallocx", small_mallocx_free);
}
TEST_END
int
main(void) {
return test_no_reentrancy(
test_large_vs_small);
}

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@ -1,44 +1,5 @@
#include "test/jemalloc_test.h" #include "test/jemalloc_test.h"
#include "test/bench.h"
static inline void
time_func(timedelta_t *timer, uint64_t nwarmup, uint64_t niter,
void (*func)(void)) {
uint64_t i;
for (i = 0; i < nwarmup; i++) {
func();
}
timer_start(timer);
for (i = 0; i < niter; i++) {
func();
}
timer_stop(timer);
}
void
compare_funcs(uint64_t nwarmup, uint64_t niter, const char *name_a,
void (*func_a), const char *name_b, void (*func_b)) {
timedelta_t timer_a, timer_b;
char ratio_buf[6];
void *p;
p = mallocx(1, 0);
if (p == NULL) {
test_fail("Unexpected mallocx() failure");
return;
}
time_func(&timer_a, nwarmup, niter, func_a);
time_func(&timer_b, nwarmup, niter, func_b);
timer_ratio(&timer_a, &timer_b, ratio_buf, sizeof(ratio_buf));
malloc_printf("%"FMTu64" iterations, %s=%"FMTu64"us, "
"%s=%"FMTu64"us, ratio=1:%s\n",
niter, name_a, timer_usec(&timer_a), name_b, timer_usec(&timer_b),
ratio_buf);
dallocx(p, 0);
}
static void static void
malloc_free(void) { malloc_free(void) {