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b4296d7f88
Currently the crypto benchmarks are processing data in varying chunk sizes, over a fixed time period. This turns out to be a terrible idea because with small chunk sizes the overhead of checking the elapsed time on each loop iteration masks the true performance. Benchmarking over a fixed data size avoids the loop running any system calls which can interfere with the performance measurements. Before this change Enc chunk 512 bytes 2283.47 MB/sec Dec chunk 512 bytes 2236.23 MB/sec OK Enc chunk 4096 bytes 2744.97 MB/sec Dec chunk 4096 bytes 2614.71 MB/sec OK Enc chunk 16384 bytes 2777.53 MB/sec Dec chunk 16384 bytes 2678.44 MB/sec OK Enc chunk 65536 bytes 2809.34 MB/sec Dec chunk 65536 bytes 2699.47 MB/sec OK After this change Enc chunk 512 bytes 2058.22 MB/sec Dec chunk 512 bytes 2030.11 MB/sec OK Enc chunk 4096 bytes 2699.27 MB/sec Dec chunk 4096 bytes 2573.78 MB/sec OK Enc chunk 16384 bytes 2748.52 MB/sec Dec chunk 16384 bytes 2653.76 MB/sec OK Enc chunk 65536 bytes 2814.08 MB/sec Dec chunk 65536 bytes 2712.74 MB/sec OK The actual crypto performance hasn't changed, which shows how significant the mis-measurement has been for small data sizes. Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
205 lines
6.0 KiB
C
205 lines
6.0 KiB
C
/*
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* QEMU Crypto cipher speed benchmark
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*
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* Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
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*
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* Authors:
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* Longpeng(Mike) <longpeng2@huawei.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* (at your option) any later version. See the COPYING file in the
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* top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "crypto/init.h"
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#include "crypto/cipher.h"
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static void test_cipher_speed(size_t chunk_size,
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QCryptoCipherMode mode,
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QCryptoCipherAlgorithm alg)
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{
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QCryptoCipher *cipher;
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Error *err = NULL;
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uint8_t *key = NULL, *iv = NULL;
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uint8_t *plaintext = NULL, *ciphertext = NULL;
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size_t nkey;
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size_t niv;
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const size_t total = 2 * GiB;
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size_t remain;
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if (!qcrypto_cipher_supports(alg, mode)) {
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return;
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}
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nkey = qcrypto_cipher_get_key_len(alg);
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niv = qcrypto_cipher_get_iv_len(alg, mode);
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if (mode == QCRYPTO_CIPHER_MODE_XTS) {
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nkey *= 2;
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}
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key = g_new0(uint8_t, nkey);
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memset(key, g_test_rand_int(), nkey);
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iv = g_new0(uint8_t, niv);
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memset(iv, g_test_rand_int(), niv);
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ciphertext = g_new0(uint8_t, chunk_size);
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plaintext = g_new0(uint8_t, chunk_size);
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memset(plaintext, g_test_rand_int(), chunk_size);
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cipher = qcrypto_cipher_new(alg, mode,
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key, nkey, &err);
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g_assert(cipher != NULL);
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if (mode != QCRYPTO_CIPHER_MODE_ECB)
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g_assert(qcrypto_cipher_setiv(cipher,
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iv, niv,
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&err) == 0);
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g_test_timer_start();
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remain = total;
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while (remain) {
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g_assert(qcrypto_cipher_encrypt(cipher,
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plaintext,
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ciphertext,
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chunk_size,
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&err) == 0);
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remain -= chunk_size;
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}
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g_test_timer_elapsed();
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g_print("Enc chunk %zu bytes ", chunk_size);
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g_print("%.2f MB/sec ", (double)total / MiB / g_test_timer_last());
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g_test_timer_start();
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remain = total;
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while (remain) {
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g_assert(qcrypto_cipher_decrypt(cipher,
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plaintext,
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ciphertext,
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chunk_size,
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&err) == 0);
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remain -= chunk_size;
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}
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g_test_timer_elapsed();
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g_print("Dec chunk %zu bytes ", chunk_size);
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g_print("%.2f MB/sec ", (double)total / MiB / g_test_timer_last());
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qcrypto_cipher_free(cipher);
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g_free(plaintext);
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g_free(ciphertext);
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g_free(iv);
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g_free(key);
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}
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static void test_cipher_speed_ecb_aes_128(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_ECB,
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QCRYPTO_CIPHER_ALG_AES_128);
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}
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static void test_cipher_speed_ecb_aes_256(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_ECB,
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QCRYPTO_CIPHER_ALG_AES_256);
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}
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static void test_cipher_speed_cbc_aes_128(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_CBC,
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QCRYPTO_CIPHER_ALG_AES_128);
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}
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static void test_cipher_speed_cbc_aes_256(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_CBC,
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QCRYPTO_CIPHER_ALG_AES_256);
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}
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static void test_cipher_speed_ctr_aes_128(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_CTR,
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QCRYPTO_CIPHER_ALG_AES_128);
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}
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static void test_cipher_speed_ctr_aes_256(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_CTR,
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QCRYPTO_CIPHER_ALG_AES_256);
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}
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static void test_cipher_speed_xts_aes_128(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_XTS,
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QCRYPTO_CIPHER_ALG_AES_128);
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}
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static void test_cipher_speed_xts_aes_256(const void *opaque)
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{
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size_t chunk_size = (size_t)opaque;
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test_cipher_speed(chunk_size,
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QCRYPTO_CIPHER_MODE_XTS,
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QCRYPTO_CIPHER_ALG_AES_256);
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}
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int main(int argc, char **argv)
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{
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char *alg = NULL;
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char *size = NULL;
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g_test_init(&argc, &argv, NULL);
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g_assert(qcrypto_init(NULL) == 0);
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#define ADD_TEST(mode, cipher, keysize, chunk) \
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if ((!alg || g_str_equal(alg, #mode)) && \
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(!size || g_str_equal(size, #chunk))) \
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g_test_add_data_func( \
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"/crypto/cipher/" #mode "-" #cipher "-" #keysize "/chunk-" #chunk, \
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(void *)chunk, \
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test_cipher_speed_ ## mode ## _ ## cipher ## _ ## keysize)
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if (argc >= 2) {
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alg = argv[1];
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}
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if (argc >= 3) {
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size = argv[2];
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}
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#define ADD_TESTS(chunk) \
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do { \
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ADD_TEST(ecb, aes, 128, chunk); \
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ADD_TEST(ecb, aes, 256, chunk); \
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ADD_TEST(cbc, aes, 128, chunk); \
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ADD_TEST(cbc, aes, 256, chunk); \
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ADD_TEST(ctr, aes, 128, chunk); \
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ADD_TEST(ctr, aes, 256, chunk); \
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ADD_TEST(xts, aes, 128, chunk); \
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ADD_TEST(xts, aes, 256, chunk); \
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} while (0)
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ADD_TESTS(512);
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ADD_TESTS(4096);
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ADD_TESTS(16384);
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ADD_TESTS(65536);
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return g_test_run();
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}
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