loop_fio_read_4k_compressed_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_compressed_direct: (groupid=0, jobs=1): err= 0: pid=3170: Thu Aug 29 22:29:34 2019 read: IOPS=28.0k, BW=110MiB/s (115MB/s)(622MiB/5680msec) clat (usec): min=8, max=564, avg=34.78, stdev=74.98 lat (usec): min=8, max=564, avg=34.89, stdev=75.00 clat percentiles (usec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 10], 20.00th=[ 10], | 30.00th=[ 10], 40.00th=[ 10], 50.00th=[ 10], 60.00th=[ 13], | 70.00th=[ 14], 80.00th=[ 16], 90.00th=[ 18], 95.00th=[ 260], | 99.00th=[ 293], 99.50th=[ 343], 99.90th=[ 404], 99.95th=[ 412], | 99.99th=[ 457] bw ( KiB/s): min=43424, max=201032, per=100.00%, avg=115161.45, stdev=60769.32, samples=11 iops : min=10856, max=50258, avg=28790.36, stdev=15192.33, samples=11 lat (usec) : 10=55.13%, 20=35.40%, 50=0.28%, 100=0.01%, 250=0.46% lat (usec) : 500=8.71%, 750=0.01% cpu : usr=6.15%, sys=13.35%, ctx=318457, majf=0, minf=14 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=110MiB/s (115MB/s), 110MiB/s-110MiB/s (115MB/s-115MB/s), io=622MiB (652MB), run=5680-5680msec Disk stats (read/write): loop1: ios=158769/0, merge=0/0, ticks=4868/0, in_queue=0, util=98.34%