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=6391 read : io=4,096MiB, bw=233MiB/s, iops=5,974, runt= 17546msec clat (usec): min=11, max=5,638, avg=37.84, stdev=34.27 bw (KiB/s) : min= 0, max=250432, per=97.23%, avg=232421.33, stdev=40183.49 write: io=4,096MiB, bw=21,404KiB/s, iops=534, runt=195952msec clat (usec): min=14, max=5,188K, avg=1628.82, stdev=27199.87 bw (KiB/s) : min= 0, max=47200, per=117.19%, avg=25083.79, stdev=19188.48 cpu : usr=19.90%, sys=2.69%, ctx=18595, majf=0, minf=2099255 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=104826/104826, short=0/0 lat (usec): 20=22.15%, 50=39.30%, 100=30.13%, 250=0.12%, 500=0.04% lat (usec): 750=0.05%, 1000=0.02% lat (msec): 2=0.65%, 4=4.42%, 10=2.66%, 20=0.11%, 50=0.12% lat (msec): 100=0.13%, 250=0.03%, 500=0.05%, 750=0.01%, 1000=0.01% lat (msec): >=2000=0.01% stresser: (groupid=1, jobs=1): err= 0: pid=6713 read : io=3,072MiB, bw=16,311KiB/s, iops=407, runt=192858msec clat (usec): min=5, max=66,070, avg=68.10, stdev=889.77 bw (KiB/s) : min= 19, max=274272, per=52.44%, avg=34202.09, stdev=64536.58 write: io=1,024MiB, bw=5,437KiB/s, iops=135, runt=192838msec clat (usec): min=6, max=6,713K, avg=7160.42, stdev=136980.61 bw (KiB/s) : min= 0, max=91744, per=50.95%, avg=11075.45, stdev=21349.75 cpu : usr=1.55%, sys=1.45%, ctx=1343, majf=0, minf=841814 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=78549/26113, short=0/0 lat (usec): 10=2.77%, 20=7.53%, 50=44.77%, 100=40.54%, 250=4.15% lat (usec): 500=0.03%, 750=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.06% lat (msec): 100=0.01%, 250=0.01%, 500=0.02%, 750=0.03%, 1000=0.02% lat (msec): 2000=0.03%, >=2000=0.02% stresser: (groupid=1, jobs=1): err= 0: pid=6714 read : io=3,072MiB, bw=16,933KiB/s, iops=423, runt=185773msec clat (usec): min=3, max=60,069, avg=67.10, stdev=898.79 bw (KiB/s) : min= 36, max=283328, per=57.24%, avg=37332.09, stdev=68098.72 write: io=1,024MiB, bw=5,635KiB/s, iops=140, runt=186081msec clat (usec): min=6, max=6,202K, avg=6896.06, stdev=141743.53 bw (KiB/s) : min= 0, max=91533, per=55.62%, avg=12091.51, stdev=22191.04 cpu : usr=1.53%, sys=1.55%, ctx=1300, majf=0, minf=840857 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=78694/26154, short=0/0 lat (usec): 4=0.01%, 10=3.10%, 20=8.89%, 50=44.41%, 100=39.52% lat (usec): 250=3.85%, 500=0.03%, 750=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.06% lat (msec): 100=0.01%, 250=0.01%, 500=0.02%, 750=0.02%, 1000=0.02% lat (msec): 2000=0.02%, >=2000=0.02% stresser: (groupid=1, jobs=1): err= 0: pid=6715 read : io=3,072MiB, bw=16,934KiB/s, iops=424, runt=185752msec clat (usec): min=5, max=999K, avg=72.31, stdev=4176.15 bw (KiB/s) : min= 6, max=644544, per=68.06%, avg=44383.48, stdev=112726.75 write: io=1,024MiB, bw=5,645KiB/s, iops=141, runt=185742msec clat (usec): min=6, max=10,642K, avg=6847.59, stdev=160018.68 bw (KiB/s) : min= 0, max=214752, per=64.99%, avg=14128.01, stdev=36795.59 cpu : usr=1.46%, sys=1.43%, ctx=1428, majf=0, minf=841859 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=78887/26212, short=0/0 lat (usec): 10=3.26%, 20=13.36%, 50=41.98%, 100=39.34%, 250=1.89% lat (usec): 500=0.02%, 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=0.01%, 500=0.02%, 750=0.02%, 1000=0.02% lat (msec): 2000=0.02%, >=2000=0.02% stresser: (groupid=1, jobs=1): err= 0: pid=6716 read : io=3,072MiB, bw=16,304KiB/s, iops=408, runt=192938msec clat (usec): min=5, max=604K, avg=62.50, stdev=2442.31 bw (KiB/s) : min= 11, max=569536, per=51.08%, avg=33309.61, stdev=85745.90 write: io=1,024MiB, bw=5,435KiB/s, iops=135, runt=192930msec clat (usec): min=6, max=7,555K, avg=7169.22, stdev=142780.18 bw (KiB/s) : min= 0, max=194176, per=49.16%, avg=10688.42, stdev=28168.06 cpu : usr=1.41%, sys=1.56%, ctx=1336, majf=0, minf=841111 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=78783/26172, short=0/0 lat (usec): 10=2.96%, 20=11.46%, 50=43.03%, 100=39.97%, 250=2.37% lat (usec): 500=0.02%, 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=0.02%, 500=0.03%, 750=0.04%, 1000=0.02% lat (msec): 2000=0.02%, >=2000=0.02% Run status group 0 (all jobs): READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17546msec, maxt=17546msec WRITE: io=4,096MiB, aggrb=21,404KiB/s, minb=21,404KiB/s, maxb=21,404KiB/s, mint=195952msec, maxt=195952msec Run status group 1 (all jobs): READ: io=12,288MiB, aggrb=65,217KiB/s, minb=16,304KiB/s, maxb=16,934KiB/s, mint=185752msec, maxt=192938msec WRITE: io=4,096MiB, aggrb=21,740KiB/s, minb=5,435KiB/s, maxb=5,645KiB/s, mint=185742msec, maxt=192930msec Disk stats (read/write): sda: ios=17446/63453, merge=0/1786053, ticks=196703/70837743, in_queue=71034411, util=95.62% 55.29user 38.94system 11:01.26elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k 8388920inputs+23234728outputs (27major+5469326minor)pagefaults 0swaps