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authorBarry Song <song.bao.hua@hisilicon.com>2020-11-16 19:08:48 +1300
committerChristoph Hellwig <hch@lst.de>2020-11-27 10:33:42 +0100
commit7679325702c90aecd393cd7cde685576c14489c0 (patch)
treef94582356bd5ab05baf6d1719f1a4a1a5eeafe3c /MAINTAINERS
parent65789daa8087e125927230ccb7e1eab13999b0cf (diff)
selftests/dma: add test application for DMA_MAP_BENCHMARK
This patch provides the test application for DMA_MAP_BENCHMARK. Before running the test application, we need to bind a device to dma_map_ benchmark driver. For example, unbind "xxx" from its original driver and bind to dma_map_benchmark: echo dma_map_benchmark > /sys/bus/platform/devices/xxx/driver_override echo xxx > /sys/bus/platform/drivers/xxx/unbind echo xxx > /sys/bus/platform/drivers/dma_map_benchmark/bind Another example for PCI devices: echo dma_map_benchmark > /sys/bus/pci/devices/0000:00:01.0/driver_override echo 0000:00:01.0 > /sys/bus/pci/drivers/xxx/unbind echo 0000:00:01.0 > /sys/bus/pci/drivers/dma_map_benchmark/bind The below command will run 16 threads on numa node 0 for 10 seconds on the device bound to dma_map_benchmark platform_driver or pci_driver: ./dma_map_benchmark -t 16 -s 10 -n 0 dma mapping benchmark: threads:16 seconds:10 average map latency(us):1.1 standard deviation:1.9 average unmap latency(us):0.5 standard deviation:0.8 Cc: Will Deacon <will@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'MAINTAINERS')
-rw-r--r--MAINTAINERS6
1 files changed, 6 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index a008b70f3c16..c88abd1d323b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5237,6 +5237,12 @@ F: include/linux/dma-mapping.h
F: include/linux/dma-map-ops.h
F: kernel/dma/
+DMA MAPPING BENCHMARK
+M: Barry Song <song.bao.hua@hisilicon.com>
+L: iommu@lists.linux-foundation.org
+F: kernel/dma/map_benchmark.c
+F: tools/testing/selftests/dma/
+
DMA-BUF HEAPS FRAMEWORK
M: Sumit Semwal <sumit.semwal@linaro.org>
R: Benjamin Gaignard <benjamin.gaignard@linaro.org>