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mirror_qemu/tests/bench/xbzrle-bench.c

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/*
* Xor Based Zero Run Length Encoding unit tests.
*
* Copyright 2013 Red Hat, Inc. and/or its affiliates
*
* Authors:
* Orit Wasserman <owasserm@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "../migration/xbzrle.h"
#if defined(CONFIG_AVX512BW_OPT)
#define XBZRLE_PAGE_SIZE 4096
static bool is_cpu_support_avx512bw;
#include "qemu/cpuid.h"
static void __attribute__((constructor)) init_cpu_flag(void)
{
unsigned max = __get_cpuid_max(0, NULL);
int a, b, c, d;
is_cpu_support_avx512bw = false;
if (max >= 1) {
__cpuid(1, a, b, c, d);
/* We must check that AVX is not just available, but usable. */
if ((c & bit_OSXSAVE) && (c & bit_AVX) && max >= 7) {
int bv;
__asm("xgetbv" : "=a"(bv), "=d"(d) : "c"(0));
__cpuid_count(7, 0, a, b, c, d);
/* 0xe6:
* XCR0[7:5] = 111b (OPMASK state, upper 256-bit of ZMM0-ZMM15
* and ZMM16-ZMM31 state are enabled by OS)
* XCR0[2:1] = 11b (XMM state and YMM state are enabled by OS)
*/
if ((bv & 0xe6) == 0xe6 && (b & bit_AVX512BW)) {
is_cpu_support_avx512bw = true;
}
}
}
return ;
}
struct ResTime {
float t_raw;
float t_512;
};
/* Function prototypes
int xbzrle_encode_buffer_avx512(uint8_t *old_buf, uint8_t *new_buf, int slen,
uint8_t *dst, int dlen);
*/
static void encode_decode_zero(struct ResTime *res)
{
uint8_t *buffer = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *buffer512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed512 = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0;
int dlen = 0, dlen512 = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_PAGE_SIZE - 1006);
for (i = diff_len; i > 0; i--) {
buffer[1000 + i] = i;
buffer512[1000 + i] = i;
}
buffer[1000 + diff_len + 3] = 103;
buffer[1000 + diff_len + 5] = 105;
buffer512[1000 + diff_len + 3] = 103;
buffer512[1000 + diff_len + 5] = 105;
/* encode zero page */
time_t t_start, t_end, t_start512, t_end512;
t_start = clock();
dlen = xbzrle_encode_buffer(buffer, buffer, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
t_end = clock();
float time_val = difftime(t_end, t_start);
g_assert(dlen == 0);
t_start512 = clock();
dlen512 = xbzrle_encode_buffer_avx512(buffer512, buffer512, XBZRLE_PAGE_SIZE,
compressed512, XBZRLE_PAGE_SIZE);
t_end512 = clock();
float time_val512 = difftime(t_end512, t_start512);
g_assert(dlen512 == 0);
res->t_raw = time_val;
res->t_512 = time_val512;
g_free(buffer);
g_free(compressed);
g_free(buffer512);
g_free(compressed512);
}
static void test_encode_decode_zero_avx512(void)
{
int i;
float time_raw = 0.0, time_512 = 0.0;
struct ResTime res;
for (i = 0; i < 10000; i++) {
encode_decode_zero(&res);
time_raw += res.t_raw;
time_512 += res.t_512;
}
printf("Zero test:\n");
printf("Raw xbzrle_encode time is %f ms\n", time_raw);
printf("512 xbzrle_encode time is %f ms\n", time_512);
}
static void encode_decode_unchanged(struct ResTime *res)
{
uint8_t *compressed = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test512 = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0;
int dlen = 0, dlen512 = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_PAGE_SIZE - 1006);
for (i = diff_len; i > 0; i--) {
test[1000 + i] = i + 4;
test512[1000 + i] = i + 4;
}
test[1000 + diff_len + 3] = 107;
test[1000 + diff_len + 5] = 109;
test512[1000 + diff_len + 3] = 107;
test512[1000 + diff_len + 5] = 109;
/* test unchanged buffer */
time_t t_start, t_end, t_start512, t_end512;
t_start = clock();
dlen = xbzrle_encode_buffer(test, test, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
t_end = clock();
float time_val = difftime(t_end, t_start);
g_assert(dlen == 0);
t_start512 = clock();
dlen512 = xbzrle_encode_buffer_avx512(test512, test512, XBZRLE_PAGE_SIZE,
compressed512, XBZRLE_PAGE_SIZE);
t_end512 = clock();
float time_val512 = difftime(t_end512, t_start512);
g_assert(dlen512 == 0);
res->t_raw = time_val;
res->t_512 = time_val512;
g_free(test);
g_free(compressed);
g_free(test512);
g_free(compressed512);
}
static void test_encode_decode_unchanged_avx512(void)
{
int i;
float time_raw = 0.0, time_512 = 0.0;
struct ResTime res;
for (i = 0; i < 10000; i++) {
encode_decode_unchanged(&res);
time_raw += res.t_raw;
time_512 += res.t_512;
}
printf("Unchanged test:\n");
printf("Raw xbzrle_encode time is %f ms\n", time_raw);
printf("512 xbzrle_encode time is %f ms\n", time_512);
}
static void encode_decode_1_byte(struct ResTime *res)
{
uint8_t *buffer = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc(XBZRLE_PAGE_SIZE);
uint8_t *buffer512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed512 = g_malloc(XBZRLE_PAGE_SIZE);
int dlen = 0, rc = 0, dlen512 = 0, rc512 = 0;
uint8_t buf[2];
uint8_t buf512[2];
test[XBZRLE_PAGE_SIZE - 1] = 1;
test512[XBZRLE_PAGE_SIZE - 1] = 1;
time_t t_start, t_end, t_start512, t_end512;
t_start = clock();
dlen = xbzrle_encode_buffer(buffer, test, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
t_end = clock();
float time_val = difftime(t_end, t_start);
g_assert(dlen == (uleb128_encode_small(&buf[0], 4095) + 2));
rc = xbzrle_decode_buffer(compressed, dlen, buffer, XBZRLE_PAGE_SIZE);
g_assert(rc == XBZRLE_PAGE_SIZE);
g_assert(memcmp(test, buffer, XBZRLE_PAGE_SIZE) == 0);
t_start512 = clock();
dlen512 = xbzrle_encode_buffer_avx512(buffer512, test512, XBZRLE_PAGE_SIZE,
compressed512, XBZRLE_PAGE_SIZE);
t_end512 = clock();
float time_val512 = difftime(t_end512, t_start512);
g_assert(dlen512 == (uleb128_encode_small(&buf512[0], 4095) + 2));
rc512 = xbzrle_decode_buffer(compressed512, dlen512, buffer512,
XBZRLE_PAGE_SIZE);
g_assert(rc512 == XBZRLE_PAGE_SIZE);
g_assert(memcmp(test512, buffer512, XBZRLE_PAGE_SIZE) == 0);
res->t_raw = time_val;
res->t_512 = time_val512;
g_free(buffer);
g_free(compressed);
g_free(test);
g_free(buffer512);
g_free(compressed512);
g_free(test512);
}
static void test_encode_decode_1_byte_avx512(void)
{
int i;
float time_raw = 0.0, time_512 = 0.0;
struct ResTime res;
for (i = 0; i < 10000; i++) {
encode_decode_1_byte(&res);
time_raw += res.t_raw;
time_512 += res.t_512;
}
printf("1 byte test:\n");
printf("Raw xbzrle_encode time is %f ms\n", time_raw);
printf("512 xbzrle_encode time is %f ms\n", time_512);
}
static void encode_decode_overflow(struct ResTime *res)
{
uint8_t *compressed = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *buffer = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *buffer512 = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0, rc = 0, rc512 = 0;
for (i = 0; i < XBZRLE_PAGE_SIZE / 2 - 1; i++) {
test[i * 2] = 1;
test512[i * 2] = 1;
}
/* encode overflow */
time_t t_start, t_end, t_start512, t_end512;
t_start = clock();
rc = xbzrle_encode_buffer(buffer, test, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
t_end = clock();
float time_val = difftime(t_end, t_start);
g_assert(rc == -1);
t_start512 = clock();
rc512 = xbzrle_encode_buffer_avx512(buffer512, test512, XBZRLE_PAGE_SIZE,
compressed512, XBZRLE_PAGE_SIZE);
t_end512 = clock();
float time_val512 = difftime(t_end512, t_start512);
g_assert(rc512 == -1);
res->t_raw = time_val;
res->t_512 = time_val512;
g_free(buffer);
g_free(compressed);
g_free(test);
g_free(buffer512);
g_free(compressed512);
g_free(test512);
}
static void test_encode_decode_overflow_avx512(void)
{
int i;
float time_raw = 0.0, time_512 = 0.0;
struct ResTime res;
for (i = 0; i < 10000; i++) {
encode_decode_overflow(&res);
time_raw += res.t_raw;
time_512 += res.t_512;
}
printf("Overflow test:\n");
printf("Raw xbzrle_encode time is %f ms\n", time_raw);
printf("512 xbzrle_encode time is %f ms\n", time_512);
}
static void encode_decode_range_avx512(struct ResTime *res)
{
uint8_t *buffer = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *buffer512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed512 = g_malloc(XBZRLE_PAGE_SIZE);
uint8_t *test512 = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0, rc = 0, rc512 = 0;
int dlen = 0, dlen512 = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_PAGE_SIZE - 1006);
for (i = diff_len; i > 0; i--) {
buffer[1000 + i] = i;
test[1000 + i] = i + 4;
buffer512[1000 + i] = i;
test512[1000 + i] = i + 4;
}
buffer[1000 + diff_len + 3] = 103;
test[1000 + diff_len + 3] = 107;
buffer[1000 + diff_len + 5] = 105;
test[1000 + diff_len + 5] = 109;
buffer512[1000 + diff_len + 3] = 103;
test512[1000 + diff_len + 3] = 107;
buffer512[1000 + diff_len + 5] = 105;
test512[1000 + diff_len + 5] = 109;
/* test encode/decode */
time_t t_start, t_end, t_start512, t_end512;
t_start = clock();
dlen = xbzrle_encode_buffer(test, buffer, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
t_end = clock();
float time_val = difftime(t_end, t_start);
rc = xbzrle_decode_buffer(compressed, dlen, test, XBZRLE_PAGE_SIZE);
g_assert(rc < XBZRLE_PAGE_SIZE);
g_assert(memcmp(test, buffer, XBZRLE_PAGE_SIZE) == 0);
t_start512 = clock();
dlen512 = xbzrle_encode_buffer_avx512(test512, buffer512, XBZRLE_PAGE_SIZE,
compressed512, XBZRLE_PAGE_SIZE);
t_end512 = clock();
float time_val512 = difftime(t_end512, t_start512);
rc512 = xbzrle_decode_buffer(compressed512, dlen512, test512, XBZRLE_PAGE_SIZE);
g_assert(rc512 < XBZRLE_PAGE_SIZE);
g_assert(memcmp(test512, buffer512, XBZRLE_PAGE_SIZE) == 0);
res->t_raw = time_val;
res->t_512 = time_val512;
g_free(buffer);
g_free(compressed);
g_free(test);
g_free(buffer512);
g_free(compressed512);
g_free(test512);
}
static void test_encode_decode_avx512(void)
{
int i;
float time_raw = 0.0, time_512 = 0.0;
struct ResTime res;
for (i = 0; i < 10000; i++) {
encode_decode_range_avx512(&res);
time_raw += res.t_raw;
time_512 += res.t_512;
}
printf("Encode decode test:\n");
printf("Raw xbzrle_encode time is %f ms\n", time_raw);
printf("512 xbzrle_encode time is %f ms\n", time_512);
}
static void encode_decode_random(struct ResTime *res)
{
uint8_t *buffer = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *buffer512 = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed512 = g_malloc(XBZRLE_PAGE_SIZE);
uint8_t *test512 = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0, rc = 0, rc512 = 0;
int dlen = 0, dlen512 = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_PAGE_SIZE - 1);
/* store the index of diff */
int dirty_index[diff_len];
for (int j = 0; j < diff_len; j++) {
dirty_index[j] = g_test_rand_int_range(0, XBZRLE_PAGE_SIZE - 1);
}
for (i = diff_len - 1; i >= 0; i--) {
buffer[dirty_index[i]] = i;
test[dirty_index[i]] = i + 4;
buffer512[dirty_index[i]] = i;
test512[dirty_index[i]] = i + 4;
}
time_t t_start, t_end, t_start512, t_end512;
t_start = clock();
dlen = xbzrle_encode_buffer(test, buffer, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
t_end = clock();
float time_val = difftime(t_end, t_start);
rc = xbzrle_decode_buffer(compressed, dlen, test, XBZRLE_PAGE_SIZE);
g_assert(rc < XBZRLE_PAGE_SIZE);
t_start512 = clock();
dlen512 = xbzrle_encode_buffer_avx512(test512, buffer512, XBZRLE_PAGE_SIZE,
compressed512, XBZRLE_PAGE_SIZE);
t_end512 = clock();
float time_val512 = difftime(t_end512, t_start512);
rc512 = xbzrle_decode_buffer(compressed512, dlen512, test512, XBZRLE_PAGE_SIZE);
g_assert(rc512 < XBZRLE_PAGE_SIZE);
res->t_raw = time_val;
res->t_512 = time_val512;
g_free(buffer);
g_free(compressed);
g_free(test);
g_free(buffer512);
g_free(compressed512);
g_free(test512);
}
static void test_encode_decode_random_avx512(void)
{
int i;
float time_raw = 0.0, time_512 = 0.0;
struct ResTime res;
for (i = 0; i < 10000; i++) {
encode_decode_random(&res);
time_raw += res.t_raw;
time_512 += res.t_512;
}
printf("Random test:\n");
printf("Raw xbzrle_encode time is %f ms\n", time_raw);
printf("512 xbzrle_encode time is %f ms\n", time_512);
}
#endif
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
g_test_rand_int();
#if defined(CONFIG_AVX512BW_OPT)
if (likely(is_cpu_support_avx512bw)) {
g_test_add_func("/xbzrle/encode_decode_zero", test_encode_decode_zero_avx512);
g_test_add_func("/xbzrle/encode_decode_unchanged",
test_encode_decode_unchanged_avx512);
g_test_add_func("/xbzrle/encode_decode_1_byte", test_encode_decode_1_byte_avx512);
g_test_add_func("/xbzrle/encode_decode_overflow",
test_encode_decode_overflow_avx512);
g_test_add_func("/xbzrle/encode_decode", test_encode_decode_avx512);
g_test_add_func("/xbzrle/encode_decode_random", test_encode_decode_random_avx512);
}
#endif
return g_test_run();
}
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