diff options
| author | Qinxin Xia <xiaqinxin@huawei.com> | 2025-10-28 20:09:00 +0800 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2025-10-29 09:41:40 +0100 |
| commit | f74ee32963f1b74865fe679e2475450434fea51c (patch) | |
| tree | 30031dc2aac1302f1610952563a862061245259f /include/uapi/linux/map_benchmark.h | |
| parent | 23ee8a2563a0f24cf4964685ced23c32be444ab8 (diff) | |
tools/dma: move dma_map_benchmark from selftests to tools/dma
dma_map_benchmark is a standalone developer tool rather than an
automated selftest. It has no pass/fail criteria, expects manual
invocation, and is built as a normal userspace binary. Move it to
tools/dma/ and add a minimal Makefile.
Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Suggested-by: Barry Song <baohua@kernel.org>
Signed-off-by: Qinxin Xia <xiaqinxin@huawei.com>
Acked-by: Barry Song <baohua@kernel.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20251028120900.2265511-3-xiaqinxin@huawei.com
Diffstat (limited to 'include/uapi/linux/map_benchmark.h')
| -rw-r--r-- | include/uapi/linux/map_benchmark.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/uapi/linux/map_benchmark.h b/include/uapi/linux/map_benchmark.h new file mode 100644 index 000000000000..c2d91088a40d --- /dev/null +++ b/include/uapi/linux/map_benchmark.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ +/* + * Copyright (C) 2022-2025 HiSilicon Limited. + */ + +#ifndef _UAPI_DMA_BENCHMARK_H +#define _UAPI_DMA_BENCHMARK_H + +#include <linux/types.h> + +#define DMA_MAP_BENCHMARK _IOWR('d', 1, struct map_benchmark) +#define DMA_MAP_MAX_THREADS 1024 +#define DMA_MAP_MAX_SECONDS 300 +#define DMA_MAP_MAX_TRANS_DELAY (10 * NSEC_PER_MSEC) + +#define DMA_MAP_BIDIRECTIONAL 0 +#define DMA_MAP_TO_DEVICE 1 +#define DMA_MAP_FROM_DEVICE 2 + +struct map_benchmark { + __u64 avg_map_100ns; /* average map latency in 100ns */ + __u64 map_stddev; /* standard deviation of map latency */ + __u64 avg_unmap_100ns; /* as above */ + __u64 unmap_stddev; + __u32 threads; /* how many threads will do map/unmap in parallel */ + __u32 seconds; /* how long the test will last */ + __s32 node; /* which numa node this benchmark will run on */ + __u32 dma_bits; /* DMA addressing capability */ + __u32 dma_dir; /* DMA data direction */ + __u32 dma_trans_ns; /* time for DMA transmission in ns */ + __u32 granule; /* how many PAGE_SIZE will do map/unmap once a time */ + __u8 expansion[76]; /* For future use */ +}; + +#endif /* _UAPI_DMA_BENCHMARK_H */ |