loop_fio_randread_4k_uncompressed_direct: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=1 fio-3.15 Starting 1 process loop_fio_randread_4k_uncompressed_direct: (groupid=0, jobs=1): err= 0: pid=1669: Fri Aug 30 10:28:12 2019 read: IOPS=82.2k, BW=321MiB/s (337MB/s)(622MiB/1937msec) clat (usec): min=8, max=105, avg=11.22, stdev= 2.95 lat (usec): min=8, max=105, avg=11.32, stdev= 2.98 clat percentiles (nsec): | 1.00th=[ 8640], 5.00th=[ 9280], 10.00th=[ 9280], 20.00th=[ 9408], | 30.00th=[ 9408], 40.00th=[ 9408], 50.00th=[ 9536], 60.00th=[ 9792], | 70.00th=[11712], 80.00th=[13888], 90.00th=[15424], 95.00th=[16064], | 99.00th=[20352], 99.50th=[22400], 99.90th=[32128], 99.95th=[33024], | 99.99th=[43776] bw ( KiB/s): min=286816, max=334880, per=96.71%, avg=318010.67, stdev=27045.30, samples=3 iops : min=71704, max=83720, avg=79502.67, stdev=6761.33, samples=3 lat (usec) : 10=62.53%, 20=36.21%, 50=1.25%, 100=0.01%, 250=0.01% cpu : usr=15.13%, sys=38.64%, ctx=318453, majf=0, minf=12 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=321MiB/s (337MB/s), 321MiB/s-321MiB/s (337MB/s-337MB/s), io=622MiB (652MB), run=1937-1937msec Disk stats (read/write): loop0: ios=154447/0, merge=0/0, ticks=1192/0, in_queue=0, util=95.18%