diff mbox series

[v3,3/3] app/test: add allocator performance autotest

Message ID 20210914103456.535427-4-dkozlyuk@nvidia.com (mailing list archive)
State Superseded
Delegated to: David Marchand
Headers show
Series eal: add memory pre-allocation from existing files | expand

Checks

Context Check Description
ci/iol-aarch64-compile-testing success Testing PASS
ci/intel-Testing fail Testing issues
ci/Intel-compilation success Compilation OK
ci/iol-x86_64-compile-testing success Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-x86_64-unit-testing success Testing PASS
ci/github-robot: build success github build: passed
ci/iol-spell-check-testing warning Testing issues
ci/checkpatch success coding style OK

Commit Message

Dmitry Kozlyuk Sept. 14, 2021, 10:34 a.m. UTC
Memory allocator performance is crucial to applications that deal
with large amount of memory or allocate frequently. DPDK allocator
performance is affected by EAL options, API used and, at least,
allocation size. New autotest is intended to be run with different
EAL options. It measures performance with a range of sizes
for dirrerent APIs: rte_malloc, rte_zmalloc, and rte_memzone_reserve.

Work distribution between allocation and deallocation depends on EAL
options. The test prints both times and total time to ease comparison.

Memory can be filled with zeroes at different points of allocation path,
but it always takes considerable fraction of overall timing. This is why
the test measures filling speed and prints how long clearing would take
for each size as a hint.

Signed-off-by: Dmitry Kozlyuk <dkozlyuk@nvidia.com>
Reviewed-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 app/test/meson.build        |   2 +
 app/test/test_malloc_perf.c | 157 ++++++++++++++++++++++++++++++++++++
 2 files changed, 159 insertions(+)
 create mode 100644 app/test/test_malloc_perf.c
diff mbox series

Patch

diff --git a/app/test/meson.build b/app/test/meson.build
index a7611686ad..a48dc79463 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -84,6 +84,7 @@  test_sources = files(
         'test_lpm6_perf.c',
         'test_lpm_perf.c',
         'test_malloc.c',
+        'test_malloc_perf.c',
         'test_mbuf.c',
         'test_member.c',
         'test_member_perf.c',
@@ -281,6 +282,7 @@  fast_tests = [
 
 perf_test_names = [
         'ring_perf_autotest',
+        'malloc_perf_autotest',
         'mempool_perf_autotest',
         'memcpy_perf_autotest',
         'hash_perf_autotest',
diff --git a/app/test/test_malloc_perf.c b/app/test/test_malloc_perf.c
new file mode 100644
index 0000000000..4435894095
--- /dev/null
+++ b/app/test/test_malloc_perf.c
@@ -0,0 +1,157 @@ 
+#include <inttypes.h>
+#include <string.h>
+#include <rte_cycles.h>
+#include <rte_errno.h>
+#include <rte_malloc.h>
+#include <rte_memzone.h>
+
+#include "test.h"
+
+typedef void * (alloc_t)(const char *name, size_t size, unsigned int align);
+typedef void (free_t)(void *addr);
+
+static const uint64_t KB = 1 << 10;
+static const uint64_t GB = 1 << 30;
+
+static double
+tsc_to_us(uint64_t tsc, size_t runs)
+{
+	return (double)tsc / rte_get_tsc_hz() * US_PER_S / runs;
+}
+
+static int
+test_memset_perf(double *us_per_gb)
+{
+	static const size_t RUNS = 20;
+
+	void *ptr;
+	size_t i;
+	uint64_t tsc;
+
+	puts("Performance: memset");
+
+	ptr = rte_malloc(NULL, GB, 0);
+	if (ptr == NULL) {
+		printf("rte_malloc(size=%"PRIx64") failed\n", GB);
+		return -1;
+	}
+
+	tsc = rte_rdtsc_precise();
+	for (i = 0; i < RUNS; i++)
+		memset(ptr, 0, GB);
+	tsc = rte_rdtsc_precise() - tsc;
+
+	*us_per_gb = tsc_to_us(tsc, RUNS);
+	printf("Result: %f.3 GiB/s <=> %.2f us/MiB\n",
+			US_PER_S / *us_per_gb, *us_per_gb / KB);
+
+	rte_free(ptr);
+	putchar('\n');
+	return 0;
+}
+
+static int
+test_alloc_perf(const char *name, alloc_t *alloc_fn, free_t free_fn,
+		size_t max_runs, double memset_gb_us)
+{
+	static const size_t SIZES[] = {
+			1 << 6, 1 << 7, 1 << 10, 1 << 12, 1 << 16, 1 << 20,
+			1 << 21, 1 << 22, 1 << 24, 1 << 30 };
+
+	size_t i, j;
+	void **ptrs;
+
+	printf("Performance: %s\n", name);
+
+	ptrs = calloc(max_runs, sizeof(ptrs[0]));
+	if (ptrs == NULL) {
+		puts("Cannot allocate memory for pointers");
+		return -1;
+	}
+
+	printf("%12s%8s%12s%12s%12s%12s\n",
+			"Size (B)", "Runs", "Alloc (us)", "Free (us)",
+			"Total (us)", "memset (us)");
+	for (i = 0; i < RTE_DIM(SIZES); i++) {
+		size_t size = SIZES[i];
+		size_t runs_done;
+		uint64_t tsc_start, tsc_alloc, tsc_free;
+		double alloc_time, free_time, memset_time;
+
+		tsc_start = rte_rdtsc_precise();
+		for (j = 0; j < max_runs; j++) {
+			ptrs[j] = alloc_fn(NULL, size, 0);
+			if (ptrs[j] == NULL)
+				break;
+		}
+		tsc_alloc = rte_rdtsc_precise() - tsc_start;
+
+		if (j == 0) {
+			printf("%12zu Interrupted: out of memory.\n", size);
+			break;
+		}
+		runs_done = j;
+
+		tsc_start = rte_rdtsc_precise();
+		for (j = 0; j < runs_done && ptrs[j] != NULL; j++)
+			free_fn(ptrs[j]);
+		tsc_free = rte_rdtsc_precise() - tsc_start;
+
+		alloc_time = tsc_to_us(tsc_alloc, runs_done);
+		free_time = tsc_to_us(tsc_free, runs_done);
+		memset_time = memset_gb_us * size / GB;
+		printf("%12zu%8zu%12.2f%12.2f%12.2f%12.2f\n",
+				size, runs_done, alloc_time, free_time,
+				alloc_time + free_time, memset_time);
+
+		memset(ptrs, 0, max_runs * sizeof(ptrs[0]));
+	}
+
+	free(ptrs);
+	putchar('\n');
+	return 0;
+}
+
+static void *
+memzone_alloc(const char *name __rte_unused, size_t size, unsigned int align)
+{
+	const struct rte_memzone *mz;
+	char gen_name[RTE_MEMZONE_NAMESIZE];
+
+	snprintf(gen_name, sizeof(gen_name), "test-mz-%"PRIx64, rte_rdtsc());
+	mz = rte_memzone_reserve_aligned(gen_name, size, SOCKET_ID_ANY,
+			RTE_MEMZONE_1GB | RTE_MEMZONE_SIZE_HINT_ONLY, align);
+	return (void *)(uintptr_t)mz;
+}
+
+static void
+memzone_free(void *addr)
+{
+	rte_memzone_free((struct rte_memzone *)addr);
+}
+
+static int
+test_malloc_perf(void)
+{
+	static const size_t MAX_RUNS = 10000;
+
+	double memset_gb_us;
+
+	if (test_memset_perf(&memset_gb_us) < 0)
+		return -1;
+
+	if (test_alloc_perf("rte_malloc", rte_malloc, rte_free,
+			MAX_RUNS, memset_gb_us) < 0)
+		return -1;
+	if (test_alloc_perf("rte_zmalloc", rte_zmalloc, rte_free,
+			MAX_RUNS, memset_gb_us) < 0)
+		return -1;
+
+	if (test_alloc_perf("rte_memzone_reserve", memzone_alloc, memzone_free,
+			RTE_MAX_MEMZONE - 1, memset_gb_us) < 0)
+		return -1;
+
+	return 0;
+}
+
+REGISTER_TEST_COMMAND(malloc_perf_autotest, test_malloc_perf);