48093287c8
Decide alignment unit for memcpy perf test based on predefined macros. Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
359 lines
13 KiB
C
359 lines
13 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <rte_common.h>
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#include <rte_cycles.h>
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#include <rte_random.h>
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#include <rte_malloc.h>
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#include <rte_memcpy.h>
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#include "test.h"
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/*
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* Set this to the maximum buffer size you want to test. If it is 0, then the
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* values in the buf_sizes[] array below will be used.
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*/
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#define TEST_VALUE_RANGE 0
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/* List of buffer sizes to test */
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#if TEST_VALUE_RANGE == 0
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static size_t buf_sizes[] = {
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1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15, 16, 17, 31, 32, 33, 63, 64, 65, 127, 128,
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129, 191, 192, 193, 255, 256, 257, 319, 320, 321, 383, 384, 385, 447, 448,
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449, 511, 512, 513, 767, 768, 769, 1023, 1024, 1025, 1518, 1522, 1536, 1600,
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2048, 2560, 3072, 3584, 4096, 4608, 5120, 5632, 6144, 6656, 7168, 7680, 8192
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};
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/* MUST be as large as largest packet size above */
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#define SMALL_BUFFER_SIZE 8192
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#else /* TEST_VALUE_RANGE != 0 */
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static size_t buf_sizes[TEST_VALUE_RANGE];
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#define SMALL_BUFFER_SIZE TEST_VALUE_RANGE
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#endif /* TEST_VALUE_RANGE == 0 */
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/*
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* Arrays of this size are used for measuring uncached memory accesses by
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* picking a random location within the buffer. Make this smaller if there are
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* memory allocation errors.
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*/
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#define LARGE_BUFFER_SIZE (100 * 1024 * 1024)
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/* How many times to run timing loop for performance tests */
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#define TEST_ITERATIONS 1000000
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#define TEST_BATCH_SIZE 100
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/* Data is aligned on this many bytes (power of 2) */
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#ifdef RTE_MACHINE_CPUFLAG_AVX512F
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#define ALIGNMENT_UNIT 64
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#elif RTE_MACHINE_CPUFLAG_AVX2
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#define ALIGNMENT_UNIT 32
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#else /* RTE_MACHINE_CPUFLAG */
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#define ALIGNMENT_UNIT 16
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#endif /* RTE_MACHINE_CPUFLAG */
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/*
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* Pointers used in performance tests. The two large buffers are for uncached
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* access where random addresses within the buffer are used for each
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* memcpy. The two small buffers are for cached access.
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*/
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static uint8_t *large_buf_read, *large_buf_write;
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static uint8_t *small_buf_read, *small_buf_write;
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/* Initialise data buffers. */
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static int
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init_buffers(void)
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{
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unsigned i;
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large_buf_read = rte_malloc("memcpy", LARGE_BUFFER_SIZE + ALIGNMENT_UNIT, ALIGNMENT_UNIT);
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if (large_buf_read == NULL)
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goto error_large_buf_read;
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large_buf_write = rte_malloc("memcpy", LARGE_BUFFER_SIZE + ALIGNMENT_UNIT, ALIGNMENT_UNIT);
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if (large_buf_write == NULL)
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goto error_large_buf_write;
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small_buf_read = rte_malloc("memcpy", SMALL_BUFFER_SIZE + ALIGNMENT_UNIT, ALIGNMENT_UNIT);
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if (small_buf_read == NULL)
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goto error_small_buf_read;
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small_buf_write = rte_malloc("memcpy", SMALL_BUFFER_SIZE + ALIGNMENT_UNIT, ALIGNMENT_UNIT);
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if (small_buf_write == NULL)
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goto error_small_buf_write;
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for (i = 0; i < LARGE_BUFFER_SIZE; i++)
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large_buf_read[i] = rte_rand();
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for (i = 0; i < SMALL_BUFFER_SIZE; i++)
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small_buf_read[i] = rte_rand();
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return 0;
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error_small_buf_write:
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rte_free(small_buf_read);
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error_small_buf_read:
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rte_free(large_buf_write);
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error_large_buf_write:
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rte_free(large_buf_read);
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error_large_buf_read:
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printf("ERROR: not enough memory\n");
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return -1;
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}
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/* Cleanup data buffers */
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static void
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free_buffers(void)
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{
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rte_free(large_buf_read);
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rte_free(large_buf_write);
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rte_free(small_buf_read);
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rte_free(small_buf_write);
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}
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/*
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* Get a random offset into large array, with enough space needed to perform
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* max copy size. Offset is aligned, uoffset is used for unalignment setting.
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*/
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static inline size_t
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get_rand_offset(size_t uoffset)
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{
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return (((rte_rand() % (LARGE_BUFFER_SIZE - SMALL_BUFFER_SIZE)) &
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~(ALIGNMENT_UNIT - 1)) + uoffset);
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}
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/* Fill in source and destination addresses. */
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static inline void
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fill_addr_arrays(size_t *dst_addr, int is_dst_cached, size_t dst_uoffset,
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size_t *src_addr, int is_src_cached, size_t src_uoffset)
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{
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unsigned int i;
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for (i = 0; i < TEST_BATCH_SIZE; i++) {
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dst_addr[i] = (is_dst_cached) ? dst_uoffset : get_rand_offset(dst_uoffset);
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src_addr[i] = (is_src_cached) ? src_uoffset : get_rand_offset(src_uoffset);
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}
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}
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/*
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* WORKAROUND: For some reason the first test doing an uncached write
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* takes a very long time (~25 times longer than is expected). So we do
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* it once without timing.
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*/
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static void
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do_uncached_write(uint8_t *dst, int is_dst_cached,
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const uint8_t *src, int is_src_cached, size_t size)
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{
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unsigned i, j;
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size_t dst_addrs[TEST_BATCH_SIZE], src_addrs[TEST_BATCH_SIZE];
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for (i = 0; i < (TEST_ITERATIONS / TEST_BATCH_SIZE); i++) {
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fill_addr_arrays(dst_addrs, is_dst_cached, 0,
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src_addrs, is_src_cached, 0);
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for (j = 0; j < TEST_BATCH_SIZE; j++) {
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rte_memcpy(dst+dst_addrs[j], src+src_addrs[j], size);
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}
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}
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}
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/*
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* Run a single memcpy performance test. This is a macro to ensure that if
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* the "size" parameter is a constant it won't be converted to a variable.
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*/
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#define SINGLE_PERF_TEST(dst, is_dst_cached, dst_uoffset, \
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src, is_src_cached, src_uoffset, size) \
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do { \
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unsigned int iter, t; \
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size_t dst_addrs[TEST_BATCH_SIZE], src_addrs[TEST_BATCH_SIZE]; \
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uint64_t start_time, total_time = 0; \
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uint64_t total_time2 = 0; \
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for (iter = 0; iter < (TEST_ITERATIONS / TEST_BATCH_SIZE); iter++) { \
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fill_addr_arrays(dst_addrs, is_dst_cached, dst_uoffset, \
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src_addrs, is_src_cached, src_uoffset); \
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start_time = rte_rdtsc(); \
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for (t = 0; t < TEST_BATCH_SIZE; t++) \
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rte_memcpy(dst+dst_addrs[t], src+src_addrs[t], size); \
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total_time += rte_rdtsc() - start_time; \
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} \
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for (iter = 0; iter < (TEST_ITERATIONS / TEST_BATCH_SIZE); iter++) { \
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fill_addr_arrays(dst_addrs, is_dst_cached, dst_uoffset, \
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src_addrs, is_src_cached, src_uoffset); \
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start_time = rte_rdtsc(); \
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for (t = 0; t < TEST_BATCH_SIZE; t++) \
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memcpy(dst+dst_addrs[t], src+src_addrs[t], size); \
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total_time2 += rte_rdtsc() - start_time; \
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} \
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printf("%8.0f -", (double)total_time /TEST_ITERATIONS); \
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printf("%5.0f", (double)total_time2 / TEST_ITERATIONS); \
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} while (0)
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/* Run aligned memcpy tests for each cached/uncached permutation */
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#define ALL_PERF_TESTS_FOR_SIZE(n) \
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do { \
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if (__builtin_constant_p(n)) \
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printf("\nC%6u", (unsigned)n); \
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else \
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printf("\n%7u", (unsigned)n); \
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SINGLE_PERF_TEST(small_buf_write, 1, 0, small_buf_read, 1, 0, n); \
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SINGLE_PERF_TEST(large_buf_write, 0, 0, small_buf_read, 1, 0, n); \
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SINGLE_PERF_TEST(small_buf_write, 1, 0, large_buf_read, 0, 0, n); \
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SINGLE_PERF_TEST(large_buf_write, 0, 0, large_buf_read, 0, 0, n); \
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} while (0)
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/* Run unaligned memcpy tests for each cached/uncached permutation */
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#define ALL_PERF_TESTS_FOR_SIZE_UNALIGNED(n) \
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do { \
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if (__builtin_constant_p(n)) \
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printf("\nC%6u", (unsigned)n); \
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else \
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printf("\n%7u", (unsigned)n); \
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SINGLE_PERF_TEST(small_buf_write, 1, 1, small_buf_read, 1, 5, n); \
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SINGLE_PERF_TEST(large_buf_write, 0, 1, small_buf_read, 1, 5, n); \
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SINGLE_PERF_TEST(small_buf_write, 1, 1, large_buf_read, 0, 5, n); \
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SINGLE_PERF_TEST(large_buf_write, 0, 1, large_buf_read, 0, 5, n); \
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} while (0)
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/* Run memcpy tests for constant length */
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#define ALL_PERF_TEST_FOR_CONSTANT \
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do { \
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TEST_CONSTANT(6U); TEST_CONSTANT(64U); TEST_CONSTANT(128U); \
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TEST_CONSTANT(192U); TEST_CONSTANT(256U); TEST_CONSTANT(512U); \
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TEST_CONSTANT(768U); TEST_CONSTANT(1024U); TEST_CONSTANT(1536U); \
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} while (0)
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/* Run all memcpy tests for aligned constant cases */
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static inline void
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perf_test_constant_aligned(void)
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{
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#define TEST_CONSTANT ALL_PERF_TESTS_FOR_SIZE
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ALL_PERF_TEST_FOR_CONSTANT;
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#undef TEST_CONSTANT
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}
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/* Run all memcpy tests for unaligned constant cases */
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static inline void
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perf_test_constant_unaligned(void)
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{
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#define TEST_CONSTANT ALL_PERF_TESTS_FOR_SIZE_UNALIGNED
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ALL_PERF_TEST_FOR_CONSTANT;
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#undef TEST_CONSTANT
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}
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/* Run all memcpy tests for aligned variable cases */
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static inline void
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perf_test_variable_aligned(void)
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{
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unsigned n = sizeof(buf_sizes) / sizeof(buf_sizes[0]);
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unsigned i;
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for (i = 0; i < n; i++) {
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ALL_PERF_TESTS_FOR_SIZE((size_t)buf_sizes[i]);
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}
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}
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/* Run all memcpy tests for unaligned variable cases */
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static inline void
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perf_test_variable_unaligned(void)
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{
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unsigned n = sizeof(buf_sizes) / sizeof(buf_sizes[0]);
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unsigned i;
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for (i = 0; i < n; i++) {
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ALL_PERF_TESTS_FOR_SIZE_UNALIGNED((size_t)buf_sizes[i]);
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}
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}
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/* Run all memcpy tests */
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static int
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perf_test(void)
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{
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int ret;
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ret = init_buffers();
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if (ret != 0)
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return ret;
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#if TEST_VALUE_RANGE != 0
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/* Set up buf_sizes array, if required */
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unsigned i;
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for (i = 0; i < TEST_VALUE_RANGE; i++)
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buf_sizes[i] = i;
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#endif
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/* See function comment */
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do_uncached_write(large_buf_write, 0, small_buf_read, 1, SMALL_BUFFER_SIZE);
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printf("\n** rte_memcpy() - memcpy perf. tests (C = compile-time constant) **\n"
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"======= ============== ============== ============== ==============\n"
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" Size Cache to cache Cache to mem Mem to cache Mem to mem\n"
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"(bytes) (ticks) (ticks) (ticks) (ticks)\n"
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"------- -------------- -------------- -------------- --------------");
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printf("\n========================== %2dB aligned ============================", ALIGNMENT_UNIT);
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/* Do aligned tests where size is a variable */
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perf_test_variable_aligned();
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printf("\n------- -------------- -------------- -------------- --------------");
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/* Do aligned tests where size is a compile-time constant */
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perf_test_constant_aligned();
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printf("\n=========================== Unaligned =============================");
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/* Do unaligned tests where size is a variable */
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perf_test_variable_unaligned();
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printf("\n------- -------------- -------------- -------------- --------------");
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/* Do unaligned tests where size is a compile-time constant */
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perf_test_constant_unaligned();
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printf("\n======= ============== ============== ============== ==============\n\n");
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free_buffers();
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return 0;
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}
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static int
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test_memcpy_perf(void)
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{
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int ret;
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ret = perf_test();
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if (ret != 0)
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return -1;
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return 0;
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}
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static struct test_command memcpy_perf_cmd = {
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.command = "memcpy_perf_autotest",
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.callback = test_memcpy_perf,
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};
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REGISTER_TEST_COMMAND(memcpy_perf_cmd);
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