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Date: Fri, 30 Jan 2015 09:20:11 +0900
From: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To: Minchan Kim <minchan@...nel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Linux-MM <linux-mm@...ck.org>, Nitin Gupta <ngupta@...are.org>,
Jerome Marchand <jmarchan@...hat.com>,
Ganesh Mahendran <opensource.ganesh@...il.com>
Subject: Re: [PATCH v1 2/2] zram: remove init_lock in zram_make_request
On (01/29/15 15:35), Minchan Kim wrote:
>
> I tested it with multiple dd processes.
>
Hello,
fio test (http://manpages.ubuntu.com/manpages/natty/man1/fio.1.html) configs are attached,
so we can run fio on different h/w (works against zram with fs mounted at /mnt/)
for i in ./test-fio-*; do fio ./$i; rm bg*; done
in short
randread
BASE READ: io=1600.0MB, aggrb=3747.8MB/s, minb=959250KB/s, maxb=982.82MB/s, mint=407msec, maxt=427msec
SRCU READ: io=1600.0MB, aggrb=3782.6MB/s, minb=968321KB/s, maxb=977.11MB/s, mint=409msec, maxt=423msec
random read/write
BASE READ: io=820304KB, aggrb=1296.3MB/s, minb=331838KB/s, maxb=333456KB/s, mint=615msec, maxt=618msec
SRCU READ: io=820304KB, aggrb=1261.6MB/s, minb=322954KB/s, maxb=335639KB/s, mint=611msec, maxt=635msec
BASE WRITE: io=818096KB, aggrb=1292.8MB/s, minb=330944KB/s, maxb=332559KB/s, mint=615msec, maxt=618msec
SRCU WRITE: io=818096KB, aggrb=1258.2MB/s, minb=322085KB/s, maxb=334736KB/s, mint=611msec, maxt=635msec
random write
BASE WRITE: io=1600.0MB, aggrb=692184KB/s, minb=173046KB/s, maxb=174669KB/s, mint=2345msec, maxt=2367msec
SRCU WRITE: io=1600.0MB, aggrb=672577KB/s, minb=168144KB/s, maxb=174149KB/s, mint=2352msec, maxt=2436msec
detailed per-process metrics:
************* BASE *************
$ for i in ./test-fio-*; do fio ./$i; rm bg*; done
bgreader: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
fio-2.2.5
Starting 4 processes
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: (groupid=0, jobs=1): err= 0: pid=10792: Thu Jan 29 19:43:30 2015
read : io=409600KB, bw=959251KB/s, iops=239812, runt= 427msec
slat (usec): min=2, max=28, avg= 2.43, stdev= 0.62
clat (usec): min=1, max=151, avg=122.97, stdev= 4.99
lat (usec): min=4, max=174, avg=125.52, stdev= 5.08
clat percentiles (usec):
| 1.00th=[ 106], 5.00th=[ 116], 10.00th=[ 121], 20.00th=[ 122],
| 30.00th=[ 122], 40.00th=[ 123], 50.00th=[ 123], 60.00th=[ 124],
| 70.00th=[ 124], 80.00th=[ 124], 90.00th=[ 125], 95.00th=[ 127],
| 99.00th=[ 143], 99.50th=[ 143], 99.90th=[ 145], 99.95th=[ 145],
| 99.99th=[ 147]
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.97%
cpu : usr=39.11%, sys=55.04%, ctx=82, majf=0, minf=38
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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
bgreader: (groupid=0, jobs=1): err= 0: pid=10793: Thu Jan 29 19:43:30 2015
read : io=409600KB, bw=982254KB/s, iops=245563, runt= 417msec
slat (usec): min=2, max=60, avg= 2.42, stdev= 0.56
clat (usec): min=1, max=187, avg=123.17, stdev= 4.02
lat (usec): min=3, max=189, avg=125.71, stdev= 4.09
clat percentiles (usec):
| 1.00th=[ 105], 5.00th=[ 121], 10.00th=[ 121], 20.00th=[ 122],
| 30.00th=[ 122], 40.00th=[ 123], 50.00th=[ 123], 60.00th=[ 124],
| 70.00th=[ 124], 80.00th=[ 125], 90.00th=[ 126], 95.00th=[ 127],
| 99.00th=[ 133], 99.50th=[ 135], 99.90th=[ 141], 99.95th=[ 175],
| 99.99th=[ 187]
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.97%
cpu : usr=40.53%, sys=55.88%, ctx=43, majf=0, minf=39
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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
bgreader: (groupid=0, jobs=1): err= 0: pid=10794: Thu Jan 29 19:43:30 2015
read : io=409600KB, bw=982.82MB/s, iops=251597, runt= 407msec
slat (usec): min=2, max=50, avg= 2.43, stdev= 0.58
clat (usec): min=2, max=174, avg=123.07, stdev= 3.97
lat (usec): min=5, max=197, avg=125.62, stdev= 4.02
clat percentiles (usec):
| 1.00th=[ 106], 5.00th=[ 120], 10.00th=[ 121], 20.00th=[ 122],
| 30.00th=[ 122], 40.00th=[ 123], 50.00th=[ 123], 60.00th=[ 123],
| 70.00th=[ 124], 80.00th=[ 125], 90.00th=[ 126], 95.00th=[ 129],
| 99.00th=[ 135], 99.50th=[ 137], 99.90th=[ 145], 99.95th=[ 153],
| 99.99th=[ 169]
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.98%
cpu : usr=41.03%, sys=57.74%, ctx=42, majf=0, minf=37
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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
bgreader: (groupid=0, jobs=1): err= 0: pid=10795: Thu Jan 29 19:43:30 2015
read : io=409600KB, bw=980.41MB/s, iops=250980, runt= 408msec
slat (usec): min=2, max=357, avg= 2.45, stdev= 1.32
clat (usec): min=1, max=498, avg=124.23, stdev=12.09
lat (usec): min=4, max=501, avg=126.80, stdev=12.33
clat percentiles (usec):
| 1.00th=[ 108], 5.00th=[ 121], 10.00th=[ 122], 20.00th=[ 122],
| 30.00th=[ 123], 40.00th=[ 123], 50.00th=[ 124], 60.00th=[ 124],
| 70.00th=[ 124], 80.00th=[ 125], 90.00th=[ 126], 95.00th=[ 127],
| 99.00th=[ 139], 99.50th=[ 141], 99.90th=[ 274], 99.95th=[ 350],
| 99.99th=[ 498]
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.61%, 500=0.37%
cpu : usr=41.18%, sys=58.09%, ctx=86, majf=0, minf=38
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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=1600.0MB, aggrb=3747.8MB/s, minb=959250KB/s, maxb=982.82MB/s, mint=407msec, maxt=427msec
Disk stats (read/write):
zram0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
bgupdater: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
fio-2.2.5
Starting 4 processes
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: (groupid=0, jobs=1): err= 0: pid=10803: Thu Jan 29 19:43:33 2015
read : io=205076KB, bw=332916KB/s, iops=83228, runt= 616msec
slat (usec): min=2, max=38, avg= 2.53, stdev= 0.71
clat (usec): min=18, max=912, avg=187.23, stdev=18.71
lat (usec): min=22, max=915, avg=189.88, stdev=18.74
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 191],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 203], 95.00th=[ 209],
| 99.00th=[ 223], 99.50th=[ 233], 99.90th=[ 258], 99.95th=[ 290],
| 99.99th=[ 908]
bw (KB /s): min=332504, max=332504, per=25.05%, avg=332504.00, stdev= 0.00
write: io=204524KB, bw=332019KB/s, iops=83004, runt= 616msec
slat (usec): min=4, max=731, avg= 6.21, stdev= 3.42
clat (usec): min=1, max=910, avg=187.36, stdev=17.80
lat (usec): min=8, max=918, avg=193.71, stdev=18.16
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 185], 50.00th=[ 187], 60.00th=[ 191],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 203], 95.00th=[ 209],
| 99.00th=[ 223], 99.50th=[ 231], 99.90th=[ 258], 99.95th=[ 282],
| 99.99th=[ 908]
bw (KB /s): min=332544, max=332544, per=25.12%, avg=332544.00, stdev= 0.00
lat (usec) : 2=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=99.80%
lat (usec) : 500=0.15%, 1000=0.03%
cpu : usr=30.36%, sys=68.99%, ctx=185, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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
bgupdater: (groupid=0, jobs=1): err= 0: pid=10804: Thu Jan 29 19:43:33 2015
read : io=205076KB, bw=331838KB/s, iops=82959, runt= 618msec
slat (usec): min=2, max=99, avg= 2.54, stdev= 0.88
clat (usec): min=13, max=4676, avg=187.64, stdev=78.01
lat (usec): min=16, max=4678, avg=190.29, stdev=78.01
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 189],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 221], 99.50th=[ 239], 99.90th=[ 342], 99.95th=[ 462],
| 99.99th=[ 4704]
bw (KB /s): min=330248, max=330248, per=24.88%, avg=330248.00, stdev= 0.00
write: io=204524KB, bw=330945KB/s, iops=82736, runt= 618msec
slat (usec): min=4, max=4458, avg= 6.24, stdev=19.77
clat (usec): min=2, max=4673, avg=187.90, stdev=80.44
lat (usec): min=6, max=4680, avg=194.28, stdev=82.87
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 189],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 219], 99.50th=[ 233], 99.90th=[ 342], 99.95th=[ 462],
| 99.99th=[ 4640]
bw (KB /s): min=330328, max=330328, per=24.95%, avg=330328.00, stdev= 0.00
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.67%, 500=0.28%
lat (msec) : 10=0.03%
cpu : usr=30.10%, sys=68.45%, ctx=67, majf=0, minf=10
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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
bgupdater: (groupid=0, jobs=1): err= 0: pid=10805: Thu Jan 29 19:43:33 2015
read : io=205076KB, bw=332916KB/s, iops=83228, runt= 616msec
slat (usec): min=2, max=4810, avg= 2.63, stdev=21.50
clat (usec): min=14, max=5018, avg=187.75, stdev=99.05
lat (usec): min=16, max=5020, avg=190.49, stdev=101.38
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 183], 50.00th=[ 185], 60.00th=[ 189],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 219], 99.50th=[ 229], 99.90th=[ 262], 99.95th=[ 956],
| 99.99th=[ 5024]
bw (KB /s): min=331056, max=331056, per=24.94%, avg=331056.00, stdev= 0.00
write: io=204524KB, bw=332019KB/s, iops=83004, runt= 616msec
slat (usec): min=4, max=49, avg= 6.11, stdev= 1.01
clat (usec): min=2, max=5018, avg=186.97, stdev=70.14
lat (usec): min=6, max=5024, avg=193.22, stdev=70.15
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 179], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 189],
| 70.00th=[ 193], 80.00th=[ 195], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 217], 99.50th=[ 227], 99.90th=[ 255], 99.95th=[ 948],
| 99.99th=[ 5024]
bw (KB /s): min=331320, max=331320, per=25.03%, avg=331320.00, stdev= 0.00
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.83%, 500=0.09%, 1000=0.03%
lat (msec) : 10=0.03%
cpu : usr=30.52%, sys=68.34%, ctx=70, majf=0, minf=8
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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
bgupdater: (groupid=0, jobs=1): err= 0: pid=10806: Thu Jan 29 19:43:33 2015
read : io=205076KB, bw=333457KB/s, iops=83364, runt= 615msec
slat (usec): min=2, max=40, avg= 2.53, stdev= 0.69
clat (usec): min=18, max=287, avg=186.73, stdev=12.94
lat (usec): min=21, max=289, avg=189.38, stdev=12.98
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 189],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 203], 95.00th=[ 207],
| 99.00th=[ 221], 99.50th=[ 229], 99.90th=[ 258], 99.95th=[ 270],
| 99.99th=[ 286]
bw (KB /s): min=332680, max=332680, per=25.06%, avg=332680.00, stdev= 0.00
write: io=204524KB, bw=332559KB/s, iops=83139, runt= 615msec
slat (usec): min=4, max=28, avg= 6.17, stdev= 1.02
clat (usec): min=2, max=285, avg=186.95, stdev=12.80
lat (usec): min=8, max=294, avg=193.26, stdev=12.89
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 185], 50.00th=[ 187], 60.00th=[ 191],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 203], 95.00th=[ 209],
| 99.00th=[ 221], 99.50th=[ 227], 99.90th=[ 251], 99.95th=[ 262],
| 99.99th=[ 274]
bw (KB /s): min=332672, max=332672, per=25.13%, avg=332672.00, stdev= 0.00
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=99.85%
lat (usec) : 500=0.14%
cpu : usr=30.73%, sys=69.11%, ctx=63, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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=820304KB, aggrb=1296.3MB/s, minb=331838KB/s, maxb=333456KB/s, mint=615msec, maxt=618msec
WRITE: io=818096KB, aggrb=1292.8MB/s, minb=330944KB/s, maxb=332559KB/s, mint=615msec, maxt=618msec
Disk stats (read/write):
zram0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
bgwriter: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
fio-2.2.5
Starting 4 processes
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
Jobs: 4 (f=4)
bgwriter: (groupid=0, jobs=1): err= 0: pid=10814: Thu Jan 29 19:43:35 2015
write: io=409600KB, bw=174150KB/s, iops=43537, runt= 2352msec
slat (usec): min=11, max=3866, avg=20.72, stdev=14.58
clat (usec): min=2, max=5074, avg=712.72, stdev=92.15
lat (usec): min=20, max=5094, avg=733.63, stdev=93.77
clat percentiles (usec):
| 1.00th=[ 612], 5.00th=[ 676], 10.00th=[ 684], 20.00th=[ 700],
| 30.00th=[ 700], 40.00th=[ 708], 50.00th=[ 708], 60.00th=[ 716],
| 70.00th=[ 716], 80.00th=[ 724], 90.00th=[ 732], 95.00th=[ 740],
| 99.00th=[ 820], 99.50th=[ 1004], 99.90th=[ 1640], 99.95th=[ 2128],
| 99.99th=[ 5088]
bw (KB /s): min=170904, max=174808, per=24.97%, avg=172816.00, stdev=1847.92
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.24%
lat (usec) : 750=96.28%, 1000=2.94%
lat (msec) : 2=0.46%, 4=0.03%, 10=0.03%
cpu : usr=10.67%, sys=88.52%, ctx=267, majf=0, minf=8
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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
bgwriter: (groupid=0, jobs=1): err= 0: pid=10815: Thu Jan 29 19:43:35 2015
write: io=409600KB, bw=173046KB/s, iops=43261, runt= 2367msec
slat (usec): min=12, max=1459, avg=20.87, stdev=10.16
clat (usec): min=2, max=2804, avg=717.25, stdev=69.33
lat (usec): min=22, max=2825, avg=738.31, stdev=70.84
clat percentiles (usec):
| 1.00th=[ 628], 5.00th=[ 676], 10.00th=[ 692], 20.00th=[ 700],
| 30.00th=[ 708], 40.00th=[ 708], 50.00th=[ 716], 60.00th=[ 716],
| 70.00th=[ 724], 80.00th=[ 732], 90.00th=[ 740], 95.00th=[ 748],
| 99.00th=[ 812], 99.50th=[ 1080], 99.90th=[ 1800], 99.95th=[ 1992],
| 99.99th=[ 2640]
bw (KB /s): min=171160, max=172768, per=24.82%, avg=171786.00, stdev=761.48
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.11%
lat (usec) : 750=95.99%, 1000=3.25%
lat (msec) : 2=0.60%, 4=0.04%
cpu : usr=10.65%, sys=88.64%, ctx=502, majf=0, minf=9
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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
bgwriter: (groupid=0, jobs=1): err= 0: pid=10816: Thu Jan 29 19:43:35 2015
write: io=409600KB, bw=174224KB/s, iops=43555, runt= 2351msec
slat (usec): min=12, max=280, avg=20.67, stdev= 2.58
clat (usec): min=2, max=1116, avg=712.42, stdev=31.10
lat (usec): min=20, max=1145, avg=733.30, stdev=31.89
clat percentiles (usec):
| 1.00th=[ 628], 5.00th=[ 676], 10.00th=[ 684], 20.00th=[ 700],
| 30.00th=[ 708], 40.00th=[ 708], 50.00th=[ 716], 60.00th=[ 716],
| 70.00th=[ 724], 80.00th=[ 724], 90.00th=[ 740], 95.00th=[ 748],
| 99.00th=[ 772], 99.50th=[ 788], 99.90th=[ 1020], 99.95th=[ 1048],
| 99.99th=[ 1080]
bw (KB /s): min=171632, max=174888, per=25.00%, avg=173026.00, stdev=1359.10
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.11%
lat (usec) : 750=94.50%, 1000=5.19%
lat (msec) : 2=0.19%
cpu : usr=10.85%, sys=88.77%, ctx=472, majf=0, minf=8
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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
bgwriter: (groupid=0, jobs=1): err= 0: pid=10817: Thu Jan 29 19:43:35 2015
write: io=409600KB, bw=174670KB/s, iops=43667, runt= 2345msec
slat (usec): min=11, max=6296, avg=20.66, stdev=24.99
clat (usec): min=2, max=5509, avg=708.98, stdev=90.54
lat (usec): min=22, max=7099, avg=729.83, stdev=94.22
clat percentiles (usec):
| 1.00th=[ 604], 5.00th=[ 676], 10.00th=[ 684], 20.00th=[ 700],
| 30.00th=[ 700], 40.00th=[ 708], 50.00th=[ 708], 60.00th=[ 716],
| 70.00th=[ 716], 80.00th=[ 724], 90.00th=[ 732], 95.00th=[ 740],
| 99.00th=[ 756], 99.50th=[ 772], 99.90th=[ 940], 99.95th=[ 1912],
| 99.99th=[ 5536]
bw (KB /s): min=170792, max=176064, per=25.05%, avg=173360.00, stdev=2157.10
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.32%
lat (usec) : 750=97.68%, 1000=1.92%
lat (msec) : 2=0.03%, 10=0.03%
cpu : usr=10.79%, sys=88.53%, ctx=252, majf=0, minf=6
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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=1600.0MB, aggrb=692184KB/s, minb=173046KB/s, maxb=174669KB/s, mint=2345msec, maxt=2367msec
Disk stats (read/write):
zram0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
==========================================================================================================
************* SRCU *************
$ for i in ./test-fio-*; do fio ./$i; rm bg*; done
bgreader: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
fio-2.2.5
Starting 4 processes
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: Laying out IO file(s) (1 file(s) / 400MB)
bgreader: (groupid=0, jobs=1): err= 0: pid=11578: Thu Jan 29 19:45:01 2015
read : io=409600KB, bw=986988KB/s, iops=246746, runt= 415msec
slat (usec): min=2, max=708, avg= 2.48, stdev= 2.29
clat (usec): min=2, max=839, avg=124.69, stdev=16.01
lat (usec): min=4, max=842, avg=127.29, stdev=16.29
clat percentiles (usec):
| 1.00th=[ 121], 5.00th=[ 122], 10.00th=[ 122], 20.00th=[ 122],
| 30.00th=[ 123], 40.00th=[ 123], 50.00th=[ 123], 60.00th=[ 123],
| 70.00th=[ 124], 80.00th=[ 124], 90.00th=[ 125], 95.00th=[ 131],
| 99.00th=[ 139], 99.50th=[ 223], 99.90th=[ 243], 99.95th=[ 282],
| 99.99th=[ 836]
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.90%, 500=0.05%, 1000=0.03%
cpu : usr=40.48%, sys=57.11%, ctx=46, majf=0, minf=39
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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
bgreader: (groupid=0, jobs=1): err= 0: pid=11579: Thu Jan 29 19:45:01 2015
read : io=409600KB, bw=968322KB/s, iops=242080, runt= 423msec
slat (usec): min=2, max=88, avg= 2.45, stdev= 0.67
clat (usec): min=1, max=213, avg=123.41, stdev= 4.23
lat (usec): min=3, max=216, avg=125.97, stdev= 4.30
clat percentiles (usec):
| 1.00th=[ 108], 5.00th=[ 121], 10.00th=[ 122], 20.00th=[ 122],
| 30.00th=[ 123], 40.00th=[ 123], 50.00th=[ 123], 60.00th=[ 124],
| 70.00th=[ 124], 80.00th=[ 124], 90.00th=[ 125], 95.00th=[ 126],
| 99.00th=[ 139], 99.50th=[ 139], 99.90th=[ 145], 99.95th=[ 195],
| 99.99th=[ 213]
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.97%
cpu : usr=39.24%, sys=55.79%, ctx=85, majf=0, minf=39
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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
bgreader: (groupid=0, jobs=1): err= 0: pid=11580: Thu Jan 29 19:45:01 2015
read : io=409600KB, bw=984615KB/s, iops=246153, runt= 416msec
slat (usec): min=2, max=51, avg= 2.42, stdev= 0.63
clat (usec): min=2, max=171, avg=123.01, stdev= 3.46
lat (usec): min=4, max=174, avg=125.55, stdev= 3.50
clat percentiles (usec):
| 1.00th=[ 120], 5.00th=[ 121], 10.00th=[ 121], 20.00th=[ 122],
| 30.00th=[ 122], 40.00th=[ 122], 50.00th=[ 122], 60.00th=[ 123],
| 70.00th=[ 123], 80.00th=[ 123], 90.00th=[ 124], 95.00th=[ 126],
| 99.00th=[ 141], 99.50th=[ 143], 99.90th=[ 145], 99.95th=[ 155],
| 99.99th=[ 171]
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.97%
cpu : usr=40.38%, sys=56.25%, ctx=82, majf=0, minf=37
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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
bgreader: (groupid=0, jobs=1): err= 0: pid=11581: Thu Jan 29 19:45:01 2015
read : io=409600KB, bw=977.11MB/s, iops=250366, runt= 409msec
slat (usec): min=2, max=236, avg= 2.46, stdev= 0.98
clat (usec): min=1, max=370, avg=124.55, stdev=11.16
lat (usec): min=4, max=372, avg=127.12, stdev=11.37
clat percentiles (usec):
| 1.00th=[ 107], 5.00th=[ 121], 10.00th=[ 122], 20.00th=[ 122],
| 30.00th=[ 123], 40.00th=[ 123], 50.00th=[ 124], 60.00th=[ 124],
| 70.00th=[ 124], 80.00th=[ 125], 90.00th=[ 125], 95.00th=[ 126],
| 99.00th=[ 175], 99.50th=[ 223], 99.90th=[ 225], 99.95th=[ 278],
| 99.99th=[ 370]
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.92%, 500=0.06%
cpu : usr=41.56%, sys=57.95%, ctx=48, majf=0, minf=38
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=102400/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=1600.0MB, aggrb=3782.6MB/s, minb=968321KB/s, maxb=977.11MB/s, mint=409msec, maxt=423msec
Disk stats (read/write):
zram0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
bgupdater: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
fio-2.2.5
Starting 4 processes
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: Laying out IO file(s) (1 file(s) / 400MB)
bgupdater: (groupid=0, jobs=1): err= 0: pid=11592: Thu Jan 29 19:45:04 2015
read : io=205076KB, bw=334545KB/s, iops=83636, runt= 613msec
slat (usec): min=2, max=73, avg= 2.56, stdev= 0.73
clat (usec): min=19, max=310, avg=186.14, stdev=13.49
lat (usec): min=22, max=312, avg=188.81, stdev=13.55
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 179], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 189],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 229], 99.50th=[ 251], 99.90th=[ 266], 99.95th=[ 274],
| 99.99th=[ 298]
bw (KB /s): min=333496, max=333496, per=25.82%, avg=333496.00, stdev= 0.00
write: io=204524KB, bw=333644KB/s, iops=83411, runt= 613msec
slat (usec): min=4, max=30, avg= 6.10, stdev= 1.01
clat (usec): min=2, max=307, avg=186.32, stdev=13.35
lat (usec): min=8, max=313, avg=192.56, stdev=13.47
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 177],
| 30.00th=[ 181], 40.00th=[ 183], 50.00th=[ 187], 60.00th=[ 189],
| 70.00th=[ 193], 80.00th=[ 197], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 227], 99.50th=[ 249], 99.90th=[ 266], 99.95th=[ 274],
| 99.99th=[ 298]
bw (KB /s): min=333368, max=333368, per=25.88%, avg=333368.00, stdev= 0.00
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.47%, 500=0.51%
cpu : usr=30.51%, sys=69.00%, ctx=68, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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
bgupdater: (groupid=0, jobs=1): err= 0: pid=11593: Thu Jan 29 19:45:04 2015
read : io=205076KB, bw=334545KB/s, iops=83636, runt= 613msec
slat (usec): min=2, max=40, avg= 2.53, stdev= 0.65
clat (usec): min=53, max=3694, avg=186.31, stdev=65.12
lat (usec): min=55, max=3697, avg=188.96, stdev=65.13
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 181], 50.00th=[ 185], 60.00th=[ 187],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 201], 95.00th=[ 207],
| 99.00th=[ 231], 99.50th=[ 249], 99.90th=[ 266], 99.95th=[ 342],
| 99.99th=[ 3696]
bw (KB /s): min=335528, max=335528, per=25.97%, avg=335528.00, stdev= 0.00
write: io=204524KB, bw=333644KB/s, iops=83411, runt= 613msec
slat (usec): min=4, max=160, avg= 6.08, stdev= 1.22
clat (usec): min=2, max=3693, avg=186.31, stdev=59.38
lat (usec): min=44, max=3699, avg=192.54, stdev=59.41
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 183], 50.00th=[ 185], 60.00th=[ 189],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 201], 95.00th=[ 205],
| 99.00th=[ 225], 99.50th=[ 247], 99.90th=[ 262], 99.95th=[ 346],
| 99.99th=[ 3696]
bw (KB /s): min=335376, max=335376, per=26.03%, avg=335376.00, stdev= 0.00
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=99.55%, 500=0.41%
lat (msec) : 4=0.03%
cpu : usr=30.34%, sys=68.68%, ctx=64, majf=0, minf=9
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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
bgupdater: (groupid=0, jobs=1): err= 0: pid=11594: Thu Jan 29 19:45:04 2015
read : io=205076KB, bw=322954KB/s, iops=80738, runt= 635msec
slat (usec): min=2, max=9087, avg= 2.75, stdev=41.31
clat (usec): min=13, max=9287, avg=193.88, stdev=237.09
lat (usec): min=15, max=9293, avg=196.75, stdev=240.69
clat percentiles (usec):
| 1.00th=[ 143], 5.00th=[ 163], 10.00th=[ 169], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 181], 50.00th=[ 185], 60.00th=[ 189],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 201], 95.00th=[ 209],
| 99.00th=[ 255], 99.50th=[ 350], 99.90th=[ 3536], 99.95th=[ 8256],
| 99.99th=[ 9280]
bw (KB /s): min=324248, max=324248, per=25.10%, avg=324248.00, stdev= 0.00
write: io=204524KB, bw=322085KB/s, iops=80521, runt= 635msec
slat (usec): min=3, max=3360, avg= 6.20, stdev=15.91
clat (usec): min=1, max=9286, avg=192.34, stdev=210.71
lat (usec): min=6, max=9293, avg=198.68, stdev=211.36
clat percentiles (usec):
| 1.00th=[ 145], 5.00th=[ 163], 10.00th=[ 169], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 183], 50.00th=[ 185], 60.00th=[ 189],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 203], 95.00th=[ 209],
| 99.00th=[ 253], 99.50th=[ 346], 99.90th=[ 1032], 99.95th=[ 8256],
| 99.99th=[ 9280]
bw (KB /s): min=324656, max=324656, per=25.20%, avg=324656.00, stdev= 0.00
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=98.84%, 500=0.93%, 750=0.05%
lat (msec) : 2=0.03%, 4=0.06%, 10=0.06%
cpu : usr=29.29%, sys=66.14%, ctx=91, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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
bgupdater: (groupid=0, jobs=1): err= 0: pid=11595: Thu Jan 29 19:45:04 2015
read : io=205076KB, bw=335640KB/s, iops=83909, runt= 611msec
slat (usec): min=2, max=58, avg= 2.56, stdev= 0.82
clat (usec): min=17, max=470, avg=185.51, stdev=15.09
lat (usec): min=20, max=472, avg=188.18, stdev=15.16
clat percentiles (usec):
| 1.00th=[ 157], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 181], 50.00th=[ 185], 60.00th=[ 187],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 201], 95.00th=[ 209],
| 99.00th=[ 233], 99.50th=[ 251], 99.90th=[ 270], 99.95th=[ 330],
| 99.99th=[ 462]
bw (KB /s): min=334544, max=334544, per=25.90%, avg=334544.00, stdev= 0.00
write: io=204524KB, bw=334736KB/s, iops=83684, runt= 611msec
slat (usec): min=4, max=90, avg= 6.07, stdev= 1.19
clat (usec): min=2, max=468, avg=185.70, stdev=14.68
lat (usec): min=8, max=474, avg=191.91, stdev=14.84
clat percentiles (usec):
| 1.00th=[ 159], 5.00th=[ 167], 10.00th=[ 171], 20.00th=[ 175],
| 30.00th=[ 179], 40.00th=[ 183], 50.00th=[ 185], 60.00th=[ 189],
| 70.00th=[ 191], 80.00th=[ 195], 90.00th=[ 203], 95.00th=[ 209],
| 99.00th=[ 231], 99.50th=[ 249], 99.90th=[ 266], 99.95th=[ 274],
| 99.99th=[ 462]
bw (KB /s): min=334440, max=334440, per=25.96%, avg=334440.00, stdev= 0.00
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=99.48%
lat (usec) : 500=0.51%
cpu : usr=30.44%, sys=68.58%, ctx=188, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=51269/w=51131/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=820304KB, aggrb=1261.6MB/s, minb=322954KB/s, maxb=335639KB/s, mint=611msec, maxt=635msec
WRITE: io=818096KB, aggrb=1258.2MB/s, minb=322085KB/s, maxb=334736KB/s, mint=611msec, maxt=635msec
Disk stats (read/write):
zram0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
bgwriter: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
fio-2.2.5
Starting 4 processes
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
bgwriter: Laying out IO file(s) (1 file(s) / 400MB)
Jobs: 4 (f=4)
bgwriter: (groupid=0, jobs=1): err= 0: pid=11605: Thu Jan 29 19:45:06 2015
write: io=409600KB, bw=168144KB/s, iops=42036, runt= 2436msec
slat (usec): min=10, max=5615, avg=21.50, stdev=37.53
clat (usec): min=2, max=9808, avg=738.51, stdev=364.25
lat (usec): min=40, max=9827, avg=760.22, stdev=371.10
clat percentiles (usec):
| 1.00th=[ 612], 5.00th=[ 668], 10.00th=[ 684], 20.00th=[ 692],
| 30.00th=[ 700], 40.00th=[ 700], 50.00th=[ 708], 60.00th=[ 708],
| 70.00th=[ 716], 80.00th=[ 724], 90.00th=[ 732], 95.00th=[ 756],
| 99.00th=[ 1576], 99.50th=[ 3056], 99.90th=[ 6816], 99.95th=[ 9408],
| 99.99th=[ 9792]
bw (KB /s): min=157408, max=176360, per=24.65%, avg=165770.00, stdev=8401.50
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.20%
lat (usec) : 750=94.24%, 1000=4.14%
lat (msec) : 2=0.63%, 4=0.45%, 10=0.33%
cpu : usr=10.26%, sys=85.22%, ctx=982, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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
bgwriter: (groupid=0, jobs=1): err= 0: pid=11606: Thu Jan 29 19:45:06 2015
write: io=409600KB, bw=173928KB/s, iops=43481, runt= 2355msec
slat (usec): min=12, max=1173, avg=20.76, stdev= 7.22
clat (usec): min=2, max=2247, avg=713.64, stdev=49.05
lat (usec): min=22, max=2270, avg=734.58, stdev=50.26
clat percentiles (usec):
| 1.00th=[ 620], 5.00th=[ 668], 10.00th=[ 684], 20.00th=[ 692],
| 30.00th=[ 700], 40.00th=[ 708], 50.00th=[ 708], 60.00th=[ 716],
| 70.00th=[ 716], 80.00th=[ 724], 90.00th=[ 740], 95.00th=[ 756],
| 99.00th=[ 868], 99.50th=[ 924], 99.90th=[ 1368], 99.95th=[ 1608],
| 99.99th=[ 2192]
bw (KB /s): min=170448, max=175504, per=25.63%, avg=172406.00, stdev=2166.56
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.13%
lat (usec) : 750=92.77%, 1000=6.92%
lat (msec) : 2=0.17%, 4=0.01%
cpu : usr=10.66%, sys=88.66%, ctx=528, majf=0, minf=8
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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
bgwriter: (groupid=0, jobs=1): err= 0: pid=11607: Thu Jan 29 19:45:06 2015
write: io=409600KB, bw=172900KB/s, iops=43224, runt= 2369msec
slat (usec): min=9, max=3458, avg=20.88, stdev=19.13
clat (usec): min=2, max=4190, avg=718.03, stdev=114.69
lat (usec): min=22, max=4210, avg=739.09, stdev=116.47
clat percentiles (usec):
| 1.00th=[ 620], 5.00th=[ 668], 10.00th=[ 684], 20.00th=[ 692],
| 30.00th=[ 700], 40.00th=[ 700], 50.00th=[ 708], 60.00th=[ 708],
| 70.00th=[ 716], 80.00th=[ 724], 90.00th=[ 732], 95.00th=[ 756],
| 99.00th=[ 1064], 99.50th=[ 1080], 99.90th=[ 2024], 99.95th=[ 3952],
| 99.99th=[ 4192]
bw (KB /s): min=168600, max=173752, per=25.49%, avg=171458.00, stdev=2129.26
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.14%
lat (usec) : 750=94.29%, 1000=2.69%
lat (msec) : 2=2.74%, 4=0.09%, 10=0.03%
cpu : usr=10.55%, sys=87.38%, ctx=373, majf=0, minf=8
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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
bgwriter: (groupid=0, jobs=1): err= 0: pid=11608: Thu Jan 29 19:45:06 2015
write: io=409600KB, bw=174150KB/s, iops=43537, runt= 2352msec
slat (usec): min=9, max=5199, avg=20.79, stdev=26.32
clat (usec): min=2, max=5915, avg=712.94, stdev=149.06
lat (usec): min=20, max=5936, avg=733.91, stdev=151.50
clat percentiles (usec):
| 1.00th=[ 628], 5.00th=[ 668], 10.00th=[ 684], 20.00th=[ 692],
| 30.00th=[ 700], 40.00th=[ 708], 50.00th=[ 708], 60.00th=[ 716],
| 70.00th=[ 716], 80.00th=[ 724], 90.00th=[ 732], 95.00th=[ 740],
| 99.00th=[ 780], 99.50th=[ 836], 99.90th=[ 2512], 99.95th=[ 5536],
| 99.99th=[ 5920]
bw (KB /s): min=170872, max=174024, per=25.68%, avg=172714.00, stdev=1386.45
lat (usec) : 4=0.01%, 50=0.01%, 100=0.01%, 250=0.01%, 500=0.10%
lat (usec) : 750=97.10%, 1000=2.55%
lat (msec) : 2=0.08%, 4=0.07%, 10=0.09%
cpu : usr=10.50%, sys=88.56%, ctx=260, majf=0, minf=6
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=102400/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=1600.0MB, aggrb=672577KB/s, minb=168144KB/s, maxb=174149KB/s, mint=2352msec, maxt=2436msec
Disk stats (read/write):
zram0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
-ss
View attachment "test-fio-randread" of type "text/plain" (126 bytes)
View attachment "test-fio-randrw" of type "text/plain" (125 bytes)
View attachment "test-fio-randwrite" of type "text/plain" (128 bytes)
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