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=5498 read : io=4,096MiB, bw=238MiB/s, iops=6,098, runt= 17213msec clat (usec): min=11, max=154, avg=35.25, stdev=16.22 bw (KiB/s) : min= 0, max=250976, per=97.18%, avg=236810.97, stdev=41582.60 write: io=4,096MiB, bw=18,077KiB/s, iops=452, runt=232012msec clat (usec): min=15, max=799K, avg=1970.62, stdev=11980.23 bw (KiB/s) : min= 0, max=65306, per=102.39%, avg=18508.87, stdev=16088.18 cpu : usr=17.45%, sys=2.35%, ctx=19688, majf=0, minf=2099256 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=104970/104970, short=0/0 lat (usec): 20=17.14%, 50=46.42%, 100=27.98%, 250=0.31%, 500=0.07% lat (usec): 750=0.14%, 1000=0.11% lat (msec): 2=1.71%, 4=3.98%, 10=0.72%, 20=0.38%, 50=0.39% lat (msec): 100=0.46%, 250=0.18%, 500=0.01%, 1000=0.01% stresser: (groupid=1, jobs=1): err= 0: pid=5705 read : io=3,072MiB, bw=8,961KiB/s, iops=224, runt=351031msec clat (usec): min=4, max=6,680, avg=45.09, stdev=59.21 bw (KiB/s) : min= 5, max=519808, per=35.33%, avg=12572.72, stdev=44332.12 write: io=1,024MiB, bw=2,987KiB/s, iops=74, runt=351016msec clat (usec): min=6, max=3,750K, avg=13262.57, stdev=142636.46 bw (KiB/s) : min= 0, max=177696, per=34.52%, avg=4094.83, stdev=14801.17 cpu : usr=0.80%, sys=0.99%, ctx=5654, majf=0, minf=850146 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=78673/26172, short=0/0 lat (usec): 10=2.81%, 20=9.93%, 50=43.56%, 100=40.26%, 250=3.03% lat (usec): 500=0.05%, 750=0.01% lat (msec): 2=0.02%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec): 100=0.01%, 250=0.02%, 500=0.02%, 750=0.06%, 1000=0.05% lat (msec): 2000=0.11%, >=2000=0.03% stresser: (groupid=1, jobs=1): err= 0: pid=5706 read : io=3,072MiB, bw=8,895KiB/s, iops=222, runt=353625msec clat (usec): min=3, max=22,930, avg=45.91, stdev=100.19 bw (KiB/s) : min= 10, max=477248, per=33.32%, avg=11857.58, stdev=37898.08 write: io=1,024MiB, bw=2,965KiB/s, iops=73, runt=353596msec clat (usec): min=6, max=4,555K, avg=13387.25, stdev=143106.83 bw (KiB/s) : min= 0, max=153536, per=32.65%, avg=3872.47, stdev=12247.61 cpu : usr=0.82%, sys=0.94%, ctx=6032, majf=0, minf=847195 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=78562/26122, short=0/0 lat (usec): 4=0.01%, 10=2.87%, 20=10.01%, 50=43.21%, 100=40.12% lat (usec): 250=3.30%, 500=0.09%, 750=0.01%, 1000=0.01% lat (msec): 2=0.03%, 4=0.02%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec): 100=0.01%, 250=0.04%, 500=0.05%, 750=0.04%, 1000=0.04% lat (msec): 2000=0.12%, >=2000=0.03% stresser: (groupid=1, jobs=1): err= 0: pid=5707 read : io=3,072MiB, bw=8,948KiB/s, iops=223, runt=351557msec clat (usec): min=3, max=6,586, avg=44.13, stdev=34.09 bw (KiB/s) : min= 5, max=523104, per=35.65%, avg=12685.28, stdev=46771.75 write: io=1,024MiB, bw=2,979KiB/s, iops=74, runt=351892msec clat (usec): min=6, max=5,809K, avg=13272.49, stdev=145246.25 bw (KiB/s) : min= 0, max=174464, per=34.06%, avg=4039.34, stdev=15059.07 cpu : usr=0.82%, sys=0.90%, ctx=5995, majf=0, minf=851154 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=78599/26225, short=0/0 lat (usec): 4=0.01%, 10=2.79%, 20=10.04%, 50=43.52%, 100=40.50% lat (usec): 250=2.80%, 500=0.04%, 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=0.06%, 1000=0.04% lat (msec): 2000=0.12%, >=2000=0.03% stresser: (groupid=1, jobs=1): err= 0: pid=5708 read : io=3,072MiB, bw=8,981KiB/s, iops=224, runt=350253msec clat (usec): min=3, max=8,843, avg=44.64, stdev=54.50 bw (KiB/s) : min= 9, max=504096, per=34.64%, avg=12324.68, stdev=43891.60 write: io=1,024MiB, bw=2,994KiB/s, iops=74, runt=350215msec clat (usec): min=6, max=4,149K, avg=13201.41, stdev=138550.36 bw (KiB/s) : min= 0, max=173824, per=33.15%, avg=3932.02, stdev=14433.73 cpu : usr=0.83%, sys=1.05%, ctx=6840, majf=0, minf=848188 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=78675/26244, short=0/0 lat (usec): 4=0.01%, 10=2.93%, 20=10.08%, 50=43.36%, 100=40.08% lat (usec): 250=3.18%, 500=0.04%, 750=0.01% lat (msec): 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01% lat (msec): 250=0.02%, 500=0.03%, 750=0.06%, 1000=0.05%, 2000=0.12% lat (msec): >=2000=0.02% Run status group 0 (all jobs): READ: io=4,096MiB, aggrb=238MiB/s, minb=238MiB/s, maxb=238MiB/s, mint=17213msec, maxt=17213msec WRITE: io=4,096MiB, aggrb=18,077KiB/s, minb=18,077KiB/s, maxb=18,077KiB/s, mint=232012msec, maxt=232012msec Run status group 1 (all jobs): READ: io=12,288MiB, aggrb=35,582KiB/s, minb=8,895KiB/s, maxb=8,981KiB/s, mint=350253msec, maxt=353625msec WRITE: io=4,096MiB, aggrb=11,861KiB/s, minb=2,965KiB/s, maxb=2,994KiB/s, mint=350215msec, maxt=353596msec Disk stats (read/write): sda: ios=18427/78549, merge=14369/1876672, ticks=265432/74681491, in_queue=74946911, util=96.98% 55.32user 44.42system 13:16.03elapsed 12%CPU (0avgtext+0avgdata 0maxresident)k 8390656inputs+24143976outputs (35major+5500886minor)pagefaults 0swaps