stresser: (g=0): rw=write, bs=16K-64K/16K-64K, ioengine=mmap, iodepth=1 stresser: (g=1): rw=randrw, bs=16K-64K/16K-64K, ioengine=mmap, iodepth=4 ... stresser: (g=1): rw=randrw, bs=16K-64K/16K-64K, ioengine=mmap, iodepth=4 Starting 5 processes stresser: Laying out IO file(s) (1 file(s) / 4096MiB) stresser: (groupid=0, jobs=1): err= 0: pid=25580 read : io=4,096MiB, bw=241MiB/s, iops=6,155, runt= 17031msec clat (usec): min=10, max=225, avg=33.51, stdev=15.60 bw (KiB/s) : min= 0, max=253696, per=97.16%, avg=239297.83, stdev=42008.44 write: io=4,096MiB, bw=21,709KiB/s, iops=542, runt=193203msec clat (usec): min=14, max=429K, avg=1602.45, stdev=9119.75 bw (KiB/s) : min= 0, max=85024, per=100.88%, avg=21899.38, stdev=14850.99 cpu : usr=18.55%, sys=3.01%, ctx=18099, majf=1, minf=2104197 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 r/w: total=104829/104829, short=0/0 lat (usec): 20=17.34%, 50=47.44%, 100=26.77%, 250=0.58%, 500=0.20% lat (usec): 750=0.19%, 1000=0.26% lat (msec): 2=1.96%, 4=2.64%, 10=0.81%, 20=0.89%, 50=0.56% lat (msec): 100=0.25%, 250=0.09%, 500=0.01% stresser: (groupid=1, jobs=1): err= 0: pid=25791 read : io=3,072MiB, bw=16,848KiB/s, iops=420, runt=186702msec clat (usec): min=4, max=3,591, avg=36.12, stdev=27.38 bw (KiB/s) : min= 21, max=675712, per=40.76%, avg=27152.98, stdev=96285.49 write: io=1,024MiB, bw=5,552KiB/s, iops=138, runt=188858msec clat (usec): min=6, max=8,313K, avg=7097.11, stdev=113041.72 bw (KiB/s) : min= 0, max=232672, per=40.06%, avg=8896.91, stdev=32155.91 cpu : usr=1.60%, sys=0.78%, ctx=5672, majf=0, minf=841599 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 r/w: total=78546/26172, short=0/0 lat (usec): 10=2.46%, 20=19.76%, 50=46.43%, 100=30.64%, 250=0.47% lat (usec): 500=0.01%, 750=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec): 100=0.01%, 250=0.03%, 500=0.04%, 750=0.02%, 1000=0.02% lat (msec): 2000=0.05%, >=2000=0.02% stresser: (groupid=1, jobs=1): err= 0: pid=25792 read : io=3,072MiB, bw=16,655KiB/s, iops=416, runt=188872msec clat (usec): min=4, max=4,985, avg=37.19, stdev=35.76 bw (KiB/s) : min= 15, max=640608, per=37.10%, avg=24717.07, stdev=86934.55 write: io=1,024MiB, bw=5,552KiB/s, iops=139, runt=188858msec clat (usec): min=6, max=4,899K, avg=7058.54, stdev=101497.45 bw (KiB/s) : min= 0, max=217440, per=37.08%, avg=8233.97, stdev=29082.58 cpu : usr=1.60%, sys=0.84%, ctx=5638, majf=0, minf=841236 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 r/w: total=78680/26303, short=0/0 lat (usec): 10=2.32%, 20=18.63%, 50=46.15%, 100=31.85%, 250=0.82% lat (usec): 500=0.02%, 1000=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec): 100=0.01%, 250=0.02%, 500=0.03%, 750=0.02%, 1000=0.03% lat (msec): 2000=0.06%, >=2000=0.01% stresser: (groupid=1, jobs=1): err= 0: pid=25793 read : io=3,072MiB, bw=16,720KiB/s, iops=417, runt=188137msec clat (usec): min=3, max=8,159, avg=37.81, stdev=53.46 bw (KiB/s) : min= 16, max=647424, per=36.73%, avg=24471.45, stdev=84209.75 write: io=1,024MiB, bw=5,573KiB/s, iops=138, runt=188130msec clat (usec): min=6, max=8,565K, avg=7084.62, stdev=106103.12 bw (KiB/s) : min= 0, max=226656, per=36.57%, avg=8121.86, stdev=28348.32 cpu : usr=1.62%, sys=0.81%, ctx=5692, majf=0, minf=842880 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 r/w: total=78474/26097, short=0/0 lat (usec): 4=0.01%, 10=2.34%, 20=19.20%, 50=46.37%, 100=31.17% lat (usec): 250=0.56%, 500=0.03%, 750=0.01%, 1000=0.01% lat (msec): 2=0.07%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.02% lat (msec): 100=0.01%, 250=0.03%, 500=0.04%, 750=0.03%, 1000=0.02% lat (msec): 2000=0.06%, >=2000=0.01% stresser: (groupid=1, jobs=1): err= 0: pid=25794 read : io=3,072MiB, bw=16,849KiB/s, iops=420, runt=186699msec clat (usec): min=4, max=12,490, avg=37.88, stdev=53.85 bw (KiB/s) : min= 23, max=619936, per=38.23%, avg=25471.58, stdev=84514.78 write: io=1,024MiB, bw=5,587KiB/s, iops=139, runt=187656msec clat (usec): min=6, max=4,525K, avg=7019.88, stdev=96387.92 bw (KiB/s) : min= 0, max=207552, per=37.63%, avg=8357.62, stdev=27913.14 cpu : usr=1.62%, sys=0.88%, ctx=6044, majf=0, minf=843757 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 r/w: total=78547/26269, short=0/0 lat (usec): 10=2.37%, 20=18.65%, 50=45.38%, 100=32.00%, 250=1.31% lat (usec): 500=0.06%, 750=0.01%, 1000=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec): 100=0.01%, 250=0.02%, 500=0.04%, 750=0.03%, 1000=0.03% lat (msec): 2000=0.06%, >=2000=0.01% Run status group 0 (all jobs): READ: io=4,096MiB, aggrb=241MiB/s, minb=241MiB/s, maxb=241MiB/s, mint=17031msec, maxt=17031msec WRITE: io=4,096MiB, aggrb=21,709KiB/s, minb=21,709KiB/s, maxb=21,709KiB/s, mint=193203msec, maxt=193203msec Run status group 1 (all jobs): READ: io=12,288MiB, aggrb=66,621KiB/s, minb=16,655KiB/s, maxb=16,849KiB/s, mint=186699msec, maxt=188872msec WRITE: io=4,096MiB, aggrb=22,208KiB/s, minb=5,552KiB/s, maxb=5,587KiB/s, mint=187656msec, maxt=188858msec Disk stats (read/write): sda: ios=17441/63846, merge=0/1781684, ticks=349246/89549273, in_queue=89898896, util=96.42% 56.07user 39.35system 11:33.29elapsed 13%CPU (0avgtext+0avgdata 0maxresident)k 8390832inputs+23281904outputs (8major+5478232minor)pagefaults 0swaps