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Signed-off-by: Mattias Rönnblom --- v3: * Changed init function buffer parameter type, to avoid cast. * Code formatting improved. v2: * Added __rte_unused to unused volatile variable, to keep the Intel compiler happy. --- MAINTAINERS | 1 + app/test/meson.build | 1 + app/test/test_cksum_perf.c | 117 +++++++++++++++++++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 app/test/test_cksum_perf.c diff --git a/MAINTAINERS b/MAINTAINERS index c923712946..2a4c99e05a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1414,6 +1414,7 @@ Network headers M: Olivier Matz F: lib/net/ F: app/test/test_cksum.c +F: app/test/test_cksum_perf.c Packet CRC M: Jasvinder Singh diff --git a/app/test/meson.build b/app/test/meson.build index 431c5bd318..191db03d1d 100644 --- a/app/test/meson.build +++ b/app/test/meson.build @@ -18,6 +18,7 @@ test_sources = files( 'test_bpf.c', 'test_byteorder.c', 'test_cksum.c', + 'test_cksum_perf.c', 'test_cmdline.c', 'test_cmdline_cirbuf.c', 'test_cmdline_etheraddr.c', diff --git a/app/test/test_cksum_perf.c b/app/test/test_cksum_perf.c new file mode 100644 index 0000000000..1f296cae34 --- /dev/null +++ b/app/test/test_cksum_perf.c @@ -0,0 +1,117 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2022 Ericsson AB + */ + +#include + +#include +#include +#include +#include +#include + +#include "test.h" + +#define NUM_BLOCKS 10 +#define ITERATIONS 1000000 + +static const size_t data_sizes[] = { 20, 21, 100, 101, 1500, 1501 }; + +static __rte_noinline uint16_t +do_rte_raw_cksum(const void *buf, size_t len) +{ + return rte_raw_cksum(buf, len); +} + +static void +init_block(char *buf, size_t len) +{ + size_t i; + + for (i = 0; i < len; i++) + buf[i] = (char)rte_rand(); +} + +static int +test_cksum_perf_size_alignment(size_t block_size, bool aligned) +{ + char *data[NUM_BLOCKS]; + char *blocks[NUM_BLOCKS]; + unsigned int i; + uint64_t start; + uint64_t end; + /* Floating point to handle low (pseudo-)TSC frequencies */ + double block_latency; + double byte_latency; + volatile __rte_unused uint64_t sum = 0; + + for (i = 0; i < NUM_BLOCKS; i++) { + data[i] = rte_malloc(NULL, block_size + 1, 0); + + if (data[i] == NULL) { + printf("Failed to allocate memory for block\n"); + return TEST_FAILED; + } + + init_block(data[i], block_size + 1); + + blocks[i] = aligned ? data[i] : data[i] + 1; + } + + start = rte_rdtsc(); + + for (i = 0; i < ITERATIONS; i++) { + unsigned int j; + for (j = 0; j < NUM_BLOCKS; j++) + sum += do_rte_raw_cksum(blocks[j], block_size); + } + + end = rte_rdtsc(); + + block_latency = (end - start) / (double)(ITERATIONS * NUM_BLOCKS); + byte_latency = block_latency / block_size; + + printf("%-9s %10zd %19.1f %16.2f\n", aligned ? "Aligned" : "Unaligned", + block_size, block_latency, byte_latency); + + for (i = 0; i < NUM_BLOCKS; i++) + rte_free(data[i]); + + return TEST_SUCCESS; +} + +static int +test_cksum_perf_size(size_t block_size) +{ + int rc; + + rc = test_cksum_perf_size_alignment(block_size, true); + if (rc != TEST_SUCCESS) + return rc; + + rc = test_cksum_perf_size_alignment(block_size, false); + + return rc; +} + +static int +test_cksum_perf(void) +{ + uint16_t i; + + printf("### rte_raw_cksum() performance ###\n"); + printf("Alignment Block size TSC cycles/block TSC cycles/byte\n"); + + for (i = 0; i < RTE_DIM(data_sizes); i++) { + int rc; + + rc = test_cksum_perf_size(data_sizes[i]); + if (rc != TEST_SUCCESS) + return rc; + } + + return TEST_SUCCESS; +} + + +REGISTER_TEST_COMMAND(cksum_perf_autotest, test_cksum_perf); -- 2.25.1