Support for dma_map_sg, add option '-m' to distinguish mode.
i) Users can set option '-m' to select mode:
DMA_MAP_SINGLE_MODE=0, DMA_MAP_SG_MODE:=1
(The mode is also show in the test result).
ii) Users can set option '-g' to set sg_nents
(total count of entries in scatterlist)
the maximum number is 1024. Each of sg buf size is PAGE_SIZE.
e.g
[root@localhost]# ./dma_map_benchmark -m 1 -g 8 -t 8 -s 30 -d 2
dma mapping mode: DMA_MAP_SG_MODE
dma mapping benchmark: threads:8 seconds:30 node:-1
dir:FROM_DEVICE granule/sg_nents: 8
average map latency(us):1.4 standard deviation:0.3
average unmap latency(us):1.3 standard deviation:0.3
[root@localhost]# ./dma_map_benchmark -m 0 -g 8 -t 8 -s 30 -d 2
dma mapping mode: DMA_MAP_SINGLE_MODE
dma mapping benchmark: threads:8 seconds:30 node:-1
dir:FROM_DEVICE granule/sg_nents: 8
average map latency(us):1.0 standard deviation:0.3
average unmap latency(us):1.3 standard deviation:0.5
Signed-off-by: Qinxin Xia <xiaqinxin@huawei.com>
---
tools/testing/selftests/dma/dma_map_benchmark.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c
index b12f1f9babf8..036ddb5ac862 100644
--- a/tools/testing/selftests/dma/dma_map_benchmark.c
+++ b/tools/testing/selftests/dma/dma_map_benchmark.c
@@ -27,6 +27,7 @@ int main(int argc, char **argv)
int fd, opt;
/* default single thread, run 20 seconds on NUMA_NO_NODE */
int threads = 1, seconds = 20, node = -1;
+ int map_mode = DMA_MAP_SINGLE_MODE;
/* default dma mask 32bit, bidirectional DMA */
int bits = 32, xdelay = 0, dir = DMA_MAP_BIDIRECTIONAL;
/* default granule 1 PAGESIZE */
@@ -34,7 +35,7 @@ int main(int argc, char **argv)
int cmd = DMA_MAP_BENCHMARK;
- while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:")) != -1) {
+ while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:m:")) != -1) {
switch (opt) {
case 't':
threads = atoi(optarg);
@@ -57,11 +58,20 @@ int main(int argc, char **argv)
case 'g':
granule = atoi(optarg);
break;
+ case 'm':
+ map_mode = atoi(optarg);
+ break;
default:
return -1;
}
}
+ if (map_mode >= DMA_MAP_MODE_MAX) {
+ fprintf(stderr, "invalid map mode, DMA_MAP_SINGLE_MODE:%d, DMA_MAP_SG_MODE:%d\n",
+ DMA_MAP_SINGLE_MODE, DMA_MAP_SG_MODE);
+ exit(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);
@@ -111,13 +121,15 @@ int main(int argc, char **argv)
map.dma_dir = dir;
map.dma_trans_ns = xdelay;
map.granule = granule;
+ map.map_mode = map_mode;
if (ioctl(fd, cmd, &map)) {
perror("ioctl");
exit(1);
}
- printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule: %d\n",
+ printf("dma mapping mode: %d\n", map_mode);
+ printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule/sg_nents: %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);
--
2.33.0On Tue, May 6, 2025 at 3:01 PM Qinxin Xia <xiaqinxin@huawei.com> wrote:
>
> Support for dma_map_sg, add option '-m' to distinguish mode.
>
> i) Users can set option '-m' to select mode:
> DMA_MAP_SINGLE_MODE=0, DMA_MAP_SG_MODE:=1
> (The mode is also show in the test result).
> ii) Users can set option '-g' to set sg_nents
> (total count of entries in scatterlist)
> the maximum number is 1024. Each of sg buf size is PAGE_SIZE.
> e.g
> [root@localhost]# ./dma_map_benchmark -m 1 -g 8 -t 8 -s 30 -d 2
> dma mapping mode: DMA_MAP_SG_MODE
> dma mapping benchmark: threads:8 seconds:30 node:-1
> dir:FROM_DEVICE granule/sg_nents: 8
> average map latency(us):1.4 standard deviation:0.3
> average unmap latency(us):1.3 standard deviation:0.3
> [root@localhost]# ./dma_map_benchmark -m 0 -g 8 -t 8 -s 30 -d 2
> dma mapping mode: DMA_MAP_SINGLE_MODE
> dma mapping benchmark: threads:8 seconds:30 node:-1
> dir:FROM_DEVICE granule/sg_nents: 8
> average map latency(us):1.0 standard deviation:0.3
> average unmap latency(us):1.3 standard deviation:0.5
>
> Signed-off-by: Qinxin Xia <xiaqinxin@huawei.com>
Either merge this into the previous patch or use the correct prefix in the
subject to differentiate patch 3 from patch 4. For example: selftests/dma
> ---
> tools/testing/selftests/dma/dma_map_benchmark.c | 16 ++++++++++++++--
> 1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c
> index b12f1f9babf8..036ddb5ac862 100644
> --- a/tools/testing/selftests/dma/dma_map_benchmark.c
> +++ b/tools/testing/selftests/dma/dma_map_benchmark.c
> @@ -27,6 +27,7 @@ int main(int argc, char **argv)
> int fd, opt;
> /* default single thread, run 20 seconds on NUMA_NO_NODE */
> int threads = 1, seconds = 20, node = -1;
> + int map_mode = DMA_MAP_SINGLE_MODE;
> /* default dma mask 32bit, bidirectional DMA */
> int bits = 32, xdelay = 0, dir = DMA_MAP_BIDIRECTIONAL;
> /* default granule 1 PAGESIZE */
> @@ -34,7 +35,7 @@ int main(int argc, char **argv)
>
> int cmd = DMA_MAP_BENCHMARK;
>
> - while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:")) != -1) {
> + while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:m:")) != -1) {
> switch (opt) {
> case 't':
> threads = atoi(optarg);
> @@ -57,11 +58,20 @@ int main(int argc, char **argv)
> case 'g':
> granule = atoi(optarg);
> break;
> + case 'm':
> + map_mode = atoi(optarg);
> + break;
> default:
> return -1;
> }
> }
>
> + if (map_mode >= DMA_MAP_MODE_MAX) {
> + fprintf(stderr, "invalid map mode, DMA_MAP_SINGLE_MODE:%d, DMA_MAP_SG_MODE:%d\n",
> + DMA_MAP_SINGLE_MODE, DMA_MAP_SG_MODE);
> + exit(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);
> @@ -111,13 +121,15 @@ int main(int argc, char **argv)
> map.dma_dir = dir;
> map.dma_trans_ns = xdelay;
> map.granule = granule;
> + map.map_mode = map_mode;
>
> if (ioctl(fd, cmd, &map)) {
> perror("ioctl");
> exit(1);
> }
>
> - printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule: %d\n",
> + printf("dma mapping mode: %d\n", map_mode);
> + printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule/sg_nents: %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);
> --
> 2.33.0
>
Thanks
Barry
在 2025/5/7 10:44, Barry Song 写道:
> On Tue, May 6, 2025 at 3:01 PM Qinxin Xia <xiaqinxin@huawei.com> wrote:
>> Support for dma_map_sg, add option '-m' to distinguish mode.
>>
>> i) Users can set option '-m' to select mode:
>> DMA_MAP_SINGLE_MODE=0, DMA_MAP_SG_MODE:=1
>> (The mode is also show in the test result).
>> ii) Users can set option '-g' to set sg_nents
>> (total count of entries in scatterlist)
>> the maximum number is 1024. Each of sg buf size is PAGE_SIZE.
>> e.g
>> [root@localhost]# ./dma_map_benchmark -m 1 -g 8 -t 8 -s 30 -d 2
>> dma mapping mode: DMA_MAP_SG_MODE
>> dma mapping benchmark: threads:8 seconds:30 node:-1
>> dir:FROM_DEVICE granule/sg_nents: 8
>> average map latency(us):1.4 standard deviation:0.3
>> average unmap latency(us):1.3 standard deviation:0.3
>> [root@localhost]# ./dma_map_benchmark -m 0 -g 8 -t 8 -s 30 -d 2
>> dma mapping mode: DMA_MAP_SINGLE_MODE
>> dma mapping benchmark: threads:8 seconds:30 node:-1
>> dir:FROM_DEVICE granule/sg_nents: 8
>> average map latency(us):1.0 standard deviation:0.3
>> average unmap latency(us):1.3 standard deviation:0.5
>>
>> Signed-off-by: Qinxin Xia <xiaqinxin@huawei.com>
> Either merge this into the previous patch or use the correct prefix in the
> subject to differentiate patch 3 from patch 4. For example: selftests/dma
Okay, I'll fix this in the next version.
Thanks!
>> ---
>> tools/testing/selftests/dma/dma_map_benchmark.c | 16 ++++++++++++++--
>> 1 file changed, 14 insertions(+), 2 deletions(-)
>>
>> diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c
>> index b12f1f9babf8..036ddb5ac862 100644
>> --- a/tools/testing/selftests/dma/dma_map_benchmark.c
>> +++ b/tools/testing/selftests/dma/dma_map_benchmark.c
>> @@ -27,6 +27,7 @@ int main(int argc, char **argv)
>> int fd, opt;
>> /* default single thread, run 20 seconds on NUMA_NO_NODE */
>> int threads = 1, seconds = 20, node = -1;
>> + int map_mode = DMA_MAP_SINGLE_MODE;
>> /* default dma mask 32bit, bidirectional DMA */
>> int bits = 32, xdelay = 0, dir = DMA_MAP_BIDIRECTIONAL;
>> /* default granule 1 PAGESIZE */
>> @@ -34,7 +35,7 @@ int main(int argc, char **argv)
>>
>> int cmd = DMA_MAP_BENCHMARK;
>>
>> - while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:")) != -1) {
>> + while ((opt = getopt(argc, argv, "t:s:n:b:d:x:g:m:")) != -1) {
>> switch (opt) {
>> case 't':
>> threads = atoi(optarg);
>> @@ -57,11 +58,20 @@ int main(int argc, char **argv)
>> case 'g':
>> granule = atoi(optarg);
>> break;
>> + case 'm':
>> + map_mode = atoi(optarg);
>> + break;
>> default:
>> return -1;
>> }
>> }
>>
>> + if (map_mode >= DMA_MAP_MODE_MAX) {
>> + fprintf(stderr, "invalid map mode, DMA_MAP_SINGLE_MODE:%d, DMA_MAP_SG_MODE:%d\n",
>> + DMA_MAP_SINGLE_MODE, DMA_MAP_SG_MODE);
>> + exit(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);
>> @@ -111,13 +121,15 @@ int main(int argc, char **argv)
>> map.dma_dir = dir;
>> map.dma_trans_ns = xdelay;
>> map.granule = granule;
>> + map.map_mode = map_mode;
>>
>> if (ioctl(fd, cmd, &map)) {
>> perror("ioctl");
>> exit(1);
>> }
>>
>> - printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule: %d\n",
>> + printf("dma mapping mode: %d\n", map_mode);
>> + printf("dma mapping benchmark: threads:%d seconds:%d node:%d dir:%s granule/sg_nents: %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);
>> --
>> 2.33.0
>>
> Thanks
> Barry
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