loop_fio_read_4k_uncompressed_direct: (g=0): rw=read, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=1 fio-3.15 Starting 1 process loop_fio_read_4k_uncompressed_direct: (groupid=0, jobs=1): err= 0: pid=3307: Thu Aug 29 22:32:23 2019 read: IOPS=91.4k, BW=357MiB/s (374MB/s)(622MiB/1743msec) clat (usec): min=8, max=127, avg=10.20, stdev= 2.32 lat (usec): min=8, max=127, avg=10.29, stdev= 2.34 clat percentiles (nsec): | 1.00th=[ 8512], 5.00th=[ 9024], 10.00th=[ 9024], 20.00th=[ 9152], | 30.00th=[ 9152], 40.00th=[ 9152], 50.00th=[ 9152], 60.00th=[ 9280], | 70.00th=[ 9280], 80.00th=[10304], 90.00th=[14272], 95.00th=[15296], | 99.00th=[16192], 99.50th=[18304], 99.90th=[24448], 99.95th=[24704], | 99.99th=[40192] bw ( KiB/s): min=328376, max=400408, per=98.63%, avg=360418.67, stdev=36667.62, samples=3 iops : min=82094, max=100102, avg=90104.67, stdev=9166.91, samples=3 lat (usec) : 10=79.72%, 20=19.94%, 50=0.33%, 100=0.01%, 250=0.01% cpu : usr=12.97%, sys=39.95%, ctx=318460, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=159232,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=1 Run status group 0 (all jobs): READ: bw=357MiB/s (374MB/s), 357MiB/s-357MiB/s (374MB/s-374MB/s), io=622MiB (652MB), run=1743-1743msec Disk stats (read/write): loop0: ios=146764/0, merge=0/0, ticks=1052/0, in_queue=0, util=94.42%