| Server IP : 3.111.61.48 / Your IP : 216.73.216.67 Web Server : Apache System : Linux ip-10-0-5-176 6.8.0-1057-aws #60~22.04.1-Ubuntu SMP Wed May 27 08:16:59 UTC 2026 x86_64 User : ubuntu ( 1000) PHP Version : 8.2.31 Disable Function : exec,passthru,shell_exec,system MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/src/linux-headers-5.19.0-1025-aws/include/linux/ |
Upload File : |
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2022 HiSilicon Limited.
*/
#ifndef _KERNEL_DMA_BENCHMARK_H
#define _KERNEL_DMA_BENCHMARK_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 */
};
#endif /* _KERNEL_DMA_BENCHMARK_H */