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authorLinus Torvalds <torvalds@linux-foundation.org>2021-05-04 20:52:09 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-04 20:52:09 +0300
commit954b7207059cc4004f2e18f49c335304b1c6d64a (patch)
tree8dc4347cead2d2eb247e198c9c50823ba7c4ea01 /tools
parent51e6f07cb12e50bfc71181bd08bad5f0a9b5e9e2 (diff)
parenta7f3d3d3600c8ed119eb0d2483de0062ce2e3707 (diff)
downloadlinux-954b7207059cc4004f2e18f49c335304b1c6d64a.tar.xz
Merge tag 'dma-mapping-5.13' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig: - add a new dma_alloc_noncontiguous API (me, Ricardo Ribalda) - fix a copyright notice (Hao Fang) - add an unlikely annotation to dma_mapping_error (Heiner Kallweit) - remove a pointless empty line (Wang Qing) - add support for multi-pages map/unmap bencharking (Xiang Chen) * tag 'dma-mapping-5.13' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: add unlikely hint to error path in dma_mapping_error dma-mapping: benchmark: Add support for multi-pages map/unmap dma-mapping: benchmark: use the correct HiSilicon copyright dma-mapping: remove a pointless empty line in dma_alloc_coherent media: uvcvideo: Use dma_alloc_noncontiguous API dma-iommu: implement ->alloc_noncontiguous dma-iommu: refactor iommu_dma_alloc_remap dma-mapping: add a dma_alloc_noncontiguous API dma-mapping: refactor dma_{alloc,free}_pages dma-mapping: add a dma_mmap_pages helper
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/dma/dma_map_benchmark.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c
index fb23ce9617ea..485dff51bad2 100644
--- a/tools/testing/selftests/dma/dma_map_benchmark.c
+++ b/tools/testing/selftests/dma/dma_map_benchmark.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Copyright (C) 2020 Hisilicon Limited.
+ * Copyright (C) 2020 HiSilicon Limited.
*/
#include <fcntl.h>
@@ -40,7 +40,8 @@ struct map_benchmark {
__u32 dma_bits; /* DMA addressing capability */
__u32 dma_dir; /* DMA data direction */
__u32 dma_trans_ns; /* time for DMA transmission in ns */
- __u8 expansion[80]; /* For future use */
+ __u32 granule; /* how many PAGE_SIZE will do map/unmap once a time */
+ __u8 expansion[76]; /* For future use */
};
int main(int argc, char **argv)
@@ -51,11 +52,13 @@ int main(int argc, char **argv)
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:")) != -1) {
+ while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:")) != -1) {
switch (opt) {
case 't':
threads = atoi(optarg);
@@ -75,6 +78,9 @@ int main(int argc, char **argv)
case 'x':
xdelay = atoi(optarg);
break;
+ case 'g':
+ granule = atoi(optarg);
+ break;
default:
return -1;
}
@@ -110,6 +116,11 @@ int main(int argc, char **argv)
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");
@@ -123,14 +134,15 @@ int main(int argc, char **argv)
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\n",
- threads, seconds, node, dir[directions]);
+ 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",