On Fri, Feb 05, 2021 at 10:52:37AM +0000, Song Bao Hua (Barry Song) wrote:
I assume there is no need to keep the same size with 5.11-rc, so could change the struct to:
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 */ __u8 expansion[84]; /* For future use */ };
This won't increase size on 64bit system, but it increases 4bytes on 32bits system comparing to 5.11-rc. How do you think about it?
Yes, that sounds good. Please send me a two patch series with the first one changing the alignment, and the second adding the delay. I'll send the first one off to Linus ASAP then.