On 2020/7/6 16:58, lampahome wrote: > Chao Yu <[email protected]> 於 2020年7月6日 週一 下午4:51寫道： >> >> On 2020/7/6 16:11, lampahome wrote: >>> Brief procedures: >>> parted /dev/sdd1 as 160GB disk >>> mkfs -t f2fs /dev/sdd1 >>> mount /dev/sdd1 /mnt/f2fsdir >>> >>> I use shell script to create 20 fio concurrently and wait for finish. >>> fio command: >>> fio -bs=4k -iodepth=4 -rw=write -ioengine=libaio -name=my -direct=0 >> >> Why not using direct=1 combining with libaio? otherwise data was only >> written to cache. >> > So directIO help performance?
I guess libaio + directio shows real device performance, rather than memory performance when using libaio + bufferedio if your memory is large enough... > >> Below info shows GC or CP didn't affect the test result. > Why? So the GC and CP works normally? > Could you tell me in detail? thanks The GC and CP value is very small, I don't think that could affect performance. > . > _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
