Read
benchmark: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=32 ... fio-2.8 Starting 8 processes benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: (groupid=0, jobs=8): err= 0: pid=15535: Sat Dec 14 00:12:44 2019 read : io=7105.6MB, bw=121265KB/s, iops=30316, runt= 60001msec clat (usec): min=0, max=1003.9K, avg=260.89, stdev=940.50 lat (usec): min=1, max=1003.9K, avg=261.29, stdev=940.50 clat percentiles (usec): | 1.00th=[ 1], 5.00th=[ 2], 10.00th=[ 161], 20.00th=[ 189], | 30.00th=[ 203], 40.00th=[ 215], 50.00th=[ 227], 60.00th=[ 245], | 70.00th=[ 278], 80.00th=[ 326], 90.00th=[ 406], 95.00th=[ 482], | 99.00th=[ 708], 99.50th=[ 828], 99.90th=[ 2288], 99.95th=[ 2704], | 99.99th=[14400] bw (KB /s): min= 3942, max=21760, per=12.53%, avg=15190.66, stdev=1907.96 lat (usec) : 2=3.64%, 4=3.76%, 10=0.34%, 20=0.12%, 50=0.01% lat (usec) : 100=0.05%, 250=53.79%, 500=34.02%, 750=3.49%, 1000=0.50% lat (msec) : 2=0.12%, 4=0.14%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec) : 100=0.01%, 250=0.01%, 2000=0.01% cpu : usr=1.05%, sys=7.07%, ctx=1681777, majf=2, minf=98 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 : total=r=1819009/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=32 Run status group 0 (all jobs): READ: io=7105.6MB, aggrb=121265KB/s, minb=121265KB/s, maxb=121265KB/s, mint=60001msec, maxt=60001msec Disk stats (read/write): sda: ios=1671621/10, merge=144/5, ticks=385432/0, in_queue=385092, util=98.64%
Write
benchmark: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=32 ... fio-2.8 Starting 8 processes benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: (groupid=0, jobs=8): err= 0: pid=15561: Sat Dec 14 00:14:47 2019 write: io=34626MB, bw=590888KB/s, iops=147722, runt= 60007msec clat (usec): min=1, max=110371, avg=38.56, stdev=740.93 lat (usec): min=1, max=110371, avg=41.20, stdev=786.70 clat percentiles (usec): | 1.00th=[ 1], 5.00th=[ 1], 10.00th=[ 2], 20.00th=[ 2], | 30.00th=[ 2], 40.00th=[ 2], 50.00th=[ 2], 60.00th=[ 2], | 70.00th=[ 2], 80.00th=[ 2], 90.00th=[ 2], 95.00th=[ 3], | 99.00th=[ 4], 99.50th=[ 155], 99.90th=[12608], 99.95th=[17280], | 99.99th=[28032] bw (KB /s): min= 1, max=93867, per=12.62%, avg=74551.39, stdev=7277.00 lat (usec) : 2=7.80%, 4=91.03%, 10=0.34%, 20=0.07%, 50=0.08% lat (usec) : 100=0.12%, 250=0.08%, 500=0.03%, 750=0.03%, 1000=0.03% lat (msec) : 2=0.04%, 4=0.05%, 10=0.14%, 20=0.11%, 50=0.03% lat (msec) : 100=0.01%, 250=0.01% cpu : usr=1.88%, sys=6.88%, ctx=91744, majf=0, minf=76 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 : total=r=0/w=8864358/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=32 Run status group 0 (all jobs): WRITE: io=34626MB, aggrb=590888KB/s, minb=590888KB/s, maxb=590888KB/s, mint=60007msec, maxt=60007msec Disk stats (read/write): sda: ios=172/2770808, merge=31/1461, ticks=4/5007316, in_queue=5002336, util=67.08%
Direct read
benchmark: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=32 ... fio-2.8 Starting 8 processes benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: (groupid=0, jobs=8): err= 0: pid=15548: Sat Dec 14 00:13:47 2019 read : io=6997.4MB, bw=119417KB/s, iops=29854, runt= 60002msec clat (usec): min=51, max=1008.4K, avg=264.70, stdev=1211.12 lat (usec): min=52, max=1008.4K, avg=265.16, stdev=1211.12 clat percentiles (usec): | 1.00th=[ 79], 5.00th=[ 139], 10.00th=[ 165], 20.00th=[ 185], | 30.00th=[ 199], 40.00th=[ 211], 50.00th=[ 223], 60.00th=[ 241], | 70.00th=[ 270], 80.00th=[ 322], 90.00th=[ 398], 95.00th=[ 478], | 99.00th=[ 716], 99.50th=[ 788], 99.90th=[ 1032], 99.95th=[ 1320], | 99.99th=[ 9536] bw (KB /s): min= 391, max=23312, per=12.54%, avg=14972.94, stdev=1899.15 lat (usec) : 100=2.50%, 250=61.34%, 500=31.96%, 750=3.47%, 1000=0.61% lat (msec) : 2=0.09%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01% lat (msec) : 100=0.01%, 250=0.01%, 2000=0.01% cpu : usr=1.09%, sys=6.67%, ctx=1822378, majf=0, minf=75 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 : total=r=1791317/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=32 Run status group 0 (all jobs): READ: io=6997.4MB, aggrb=119417KB/s, minb=119417KB/s, maxb=119417KB/s, mint=60002msec, maxt=60002msec Disk stats (read/write): sda: ios=1787341/10, merge=136/5, ticks=397456/0, in_queue=397140, util=99.63%
Direct write
benchmark: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=32 ... fio-2.8 Starting 8 processes benchmark: Laying out IO file(s) (1 file(s) / 256MB) benchmark: (groupid=0, jobs=8): err= 0: pid=15574: Sat Dec 14 00:15:48 2019 write: io=2134.7MB, bw=36430KB/s, iops=9107, runt= 60003msec clat (usec): min=64, max=143251, avg=875.05, stdev=5614.52 lat (usec): min=65, max=143252, avg=875.49, stdev=5614.53 clat percentiles (usec): | 1.00th=[ 70], 5.00th=[ 71], 10.00th=[ 73], 20.00th=[ 75], | 30.00th=[ 77], 40.00th=[ 80], 50.00th=[ 82], 60.00th=[ 86], | 70.00th=[ 91], 80.00th=[ 104], 90.00th=[ 233], 95.00th=[ 306], | 99.00th=[40192], 99.50th=[44288], 99.90th=[46848], 99.95th=[48384], | 99.99th=[61184] bw (KB /s): min= 2576, max= 6080, per=12.51%, avg=4556.05, stdev=585.26 lat (usec) : 100=78.06%, 250=13.06%, 500=6.91%, 750=0.05%, 1000=0.03% lat (msec) : 2=0.02%, 4=0.01%, 10=0.01%, 20=0.01%, 50=1.84% lat (msec) : 100=0.03%, 250=0.01% cpu : usr=0.40%, sys=2.49%, ctx=1103528, majf=0, minf=66 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 : total=r=0/w=546471/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=32 Run status group 0 (all jobs): WRITE: io=2134.7MB, aggrb=36429KB/s, minb=36429KB/s, maxb=36429KB/s, mint=60003msec, maxt=60003msec Disk stats (read/write): sda: ios=179/545918, merge=322/1528, ticks=408/47584, in_queue=47876, util=79.18%