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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /tools/testing/selftests/dma | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/dma')
-rw-r--r-- | tools/testing/selftests/dma/Makefile | 7 | ||||
-rw-r--r-- | tools/testing/selftests/dma/config | 1 | ||||
-rw-r--r-- | tools/testing/selftests/dma/dma_map_benchmark.c | 129 |
3 files changed, 137 insertions, 0 deletions
diff --git a/tools/testing/selftests/dma/Makefile b/tools/testing/selftests/dma/Makefile new file mode 100644 index 000000000..cd8c5ece1 --- /dev/null +++ b/tools/testing/selftests/dma/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +CFLAGS += -I../../../../usr/include/ +CFLAGS += -I../../../../include/ + +TEST_GEN_PROGS := dma_map_benchmark + +include ../lib.mk diff --git a/tools/testing/selftests/dma/config b/tools/testing/selftests/dma/config new file mode 100644 index 000000000..6102ee3c4 --- /dev/null +++ b/tools/testing/selftests/dma/config @@ -0,0 +1 @@ +CONFIG_DMA_MAP_BENCHMARK=y diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c new file mode 100644 index 000000000..5c997f17f --- /dev/null +++ b/tools/testing/selftests/dma/dma_map_benchmark.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 HiSilicon Limited. + */ + +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <linux/types.h> +#include <linux/map_benchmark.h> + +#define NSEC_PER_MSEC 1000000L + +static char *directions[] = { + "BIDIRECTIONAL", + "TO_DEVICE", + "FROM_DEVICE", +}; + +int main(int argc, char **argv) +{ + struct map_benchmark map; + int fd, opt; + /* default single thread, run 20 seconds on NUMA_NO_NODE */ + int threads = 1, seconds = 20, node = -1; + /* default dma mask 32bit, bidirectional DMA */ + int bits = 32, xdelay = 0, dir = DMA_MAP_BIDIRECTIONAL; + /* default granule 1 PAGESIZE */ + int granule = 1; + + int cmd = DMA_MAP_BENCHMARK; + char *p; + + while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:")) != -1) { + switch (opt) { + case 't': + threads = atoi(optarg); + break; + case 's': + seconds = atoi(optarg); + break; + case 'n': + node = atoi(optarg); + break; + case 'b': + bits = atoi(optarg); + break; + case 'd': + dir = atoi(optarg); + break; + case 'x': + xdelay = atoi(optarg); + break; + case 'g': + granule = atoi(optarg); + break; + default: + return -1; + } + } + + if (threads <= 0 || threads > DMA_MAP_MAX_THREADS) { + fprintf(stderr, "invalid number of threads, must be in 1-%d\n", + DMA_MAP_MAX_THREADS); + exit(1); + } + + if (seconds <= 0 || seconds > DMA_MAP_MAX_SECONDS) { + fprintf(stderr, "invalid number of seconds, must be in 1-%d\n", + DMA_MAP_MAX_SECONDS); + exit(1); + } + + if (xdelay < 0 || xdelay > DMA_MAP_MAX_TRANS_DELAY) { + fprintf(stderr, "invalid transmit delay, must be in 0-%ld\n", + DMA_MAP_MAX_TRANS_DELAY); + exit(1); + } + + /* suppose the mininum DMA zone is 1MB in the world */ + if (bits < 20 || bits > 64) { + fprintf(stderr, "invalid dma mask bit, must be in 20-64\n"); + exit(1); + } + + if (dir != DMA_MAP_BIDIRECTIONAL && dir != DMA_MAP_TO_DEVICE && + dir != DMA_MAP_FROM_DEVICE) { + fprintf(stderr, "invalid dma direction\n"); + exit(1); + } + + if (granule < 1 || granule > 1024) { + fprintf(stderr, "invalid granule size\n"); + exit(1); + } + + fd = open("/sys/kernel/debug/dma_map_benchmark", O_RDWR); + if (fd == -1) { + perror("open"); + exit(1); + } + + memset(&map, 0, sizeof(map)); + map.seconds = seconds; + map.threads = threads; + map.node = node; + map.dma_bits = bits; + map.dma_dir = dir; + map.dma_trans_ns = xdelay; + map.granule = granule; + + if (ioctl(fd, cmd, &map)) { + perror("ioctl"); + exit(1); + } + + printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule: %d\n", + threads, seconds, node, dir[directions], granule); + printf("average map latency(us):%.1f standard deviation:%.1f\n", + map.avg_map_100ns/10.0, map.map_stddev/10.0); + printf("average unmap latency(us):%.1f standard deviation:%.1f\n", + map.avg_unmap_100ns/10.0, map.unmap_stddev/10.0); + + return 0; +} |