Hi, #any reply, please Cc: wangyugui@xxxxxxxxxxxx dbench throughput(sync, reflink=0|1) on xfs over hardware throughput(6Gb/s=750MB/s). Is this a bug of xfs sync? or some feature of performance optimization? we test mkfs.xfs -m reflink=0|1, crc=0|1, still over hardware throughput(6Gb/s=750MB/s). Disk: TOSHIBA PX05SMQ040 This is a 12Gb/s SAS SSD disk, but connect to 6Gb/s SAS HBA, so it works with 6Gb/s. dbench -s -t 60 -D /xfs 32 #Throughput 884.406 MB/sec (sync open) dbench -s -t 60 -D /xfs 1 #Throughput 149.172 MB/sec (sync open) we test the same disk with ext4 filesystem, the throughput is very close to, but less than the hardware limit. dbench -s -t 60 -D /ext4 32 #Throughput 740.95 MB/sec (sync open) dbench -s -t 60 -D /ext4 1 #Throughput 124.67 MB/sec (sync open) linux kernel: 5.4.70, 5.9.0 Best Regards Wang Yugui (wangyugui@xxxxxxxxxxxx) 2020/10/13
