en Copyright 2015 Java http://172.16.0.5:8080/history/linux-6.15/tools/testing/selftests/dma/Makefile#12a29115 selftests dma: fix compile error for dma_map_benchmarkWhen building selftests/dma:$ make -C tools/testing/selftests TARGETS=dmaI hit the following compilation error:dma_map_benchmark.c:13:10: fatal error: linux/map_benchmark.h: No such file or directory #include <linux/map_benchmark.h> ^~~~~~~~~~~~~~~~~~~~~~~dma/Makefile does not include the map_benchmark.h path, so addmore including path, and fix include order in dma_map_benchmark.cFixes: 8ddde07a3d28 ("dma-mapping: benchmark: extract a common header file for map_benchmark definition")Signed-off-by: Yu Liao <liaoyu15@huawei.com>Tested-by: Shuah Khan <skhan@linuxfoundation.org>Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> List of files: /linux-6.15/tools/testing/selftests/dma/Makefile Tue, 14 Jun 2022 12:02:35 +0000 Yu Liao <liaoyu15@huawei.com> http://172.16.0.5:8080/history/linux-6.15/tools/testing/selftests/dma/Makefile#76793257 selftests/dma: add test application for DMA_MAP_BENCHMARKThis 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 andbind to dma_map_benchmark:echo dma_map_benchmark > /sys/bus/platform/devices/xxx/driver_overrideecho xxx > /sys/bus/platform/drivers/xxx/unbindecho xxx > /sys/bus/platform/drivers/dma_map_benchmark/bindAnother example for PCI devices:echo dma_map_benchmark > /sys/bus/pci/devices/0000:00:01.0/driver_overrideecho 0000:00:01.0 > /sys/bus/pci/drivers/xxx/unbindecho 0000:00:01.0 > /sys/bus/pci/drivers/dma_map_benchmark/bindThe below command will run 16 threads on numa node 0 for 10 seconds onthe device bound to dma_map_benchmark platform_driver or pci_driver:./dma_map_benchmark -t 16 -s 10 -n 0dma mapping benchmark: threads:16 seconds:10average map latency(us):1.1 standard deviation:1.9average unmap latency(us):0.5 standard deviation:0.8Cc: 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> List of files: /linux-6.15/tools/testing/selftests/dma/Makefile Mon, 16 Nov 2020 06:08:48 +0000 Barry Song <song.bao.hua@hisilicon.com>