The following simple setup
---
[global]
ioengine=psync
direct=1
sync=1
[randrwrite]
filename=/tmp/test.dat
lockfile=exclusive
filesize=1m
;
thread=1
numjobs=4
runtime=10
time_based=1
;
rw=randwrite
bs=4k
---
runs fine with jobs being processes, and fails as follows with thread=1.
randrwrite: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=psync, iodepth=1
...
fio-2.1.6.1-23-g9f97
Starting 4 threads
fio: pid=10455, err=9/file:engines/sync.c:67, func=xfer, error=Bad
file descriptor]
fio: pid=10453, err=9/file:engines/sync.c:67, func=xfer, error=Bad
file descriptor
fio: pid=10454, err=9/file:engines/sync.c:67, func=xfer, error=Bad
file descriptor
Jobs: 1 (f=1): [wXXX] [100.0% done] [0KB/2372KB/0KB /s] [0/593/0 iops]
[eta 00m:00s]
randrwrite: (groupid=0, jobs=1): err= 0: pid=10452: Mon Mar 31 18:05:26 2014
write: io=14900KB, bw=1489.9KB/s, iops=372, runt= 10001msec
clat (usec): min=419, max=260739, avg=1546.00, stdev=4329.54
lat (usec): min=424, max=260744, avg=1551.95, stdev=4329.58
clat percentiles (usec):
| 1.00th=[ 588], 5.00th=[ 732], 10.00th=[ 780], 20.00th=[ 828],
| 30.00th=[ 876], 40.00th=[ 956], 50.00th=[ 1080], 60.00th=[ 1432],
| 70.00th=[ 2064], 80.00th=[ 2256], 90.00th=[ 2480], 95.00th=[ 2736],
| 99.00th=[ 3344], 99.50th=[ 3632], 99.90th=[ 4512], 99.95th=[23680],
| 99.99th=[261120]
bw (KB /s): min= 5, max= 1099, per=22.09%, avg=519.90, stdev=359.34
lat (usec) : 500=0.19%, 750=6.42%, 1000=37.61%
lat (msec) : 2=23.68%, 4=31.81%, 10=0.24%, 50=0.03%, 500=0.03%
cpu : usr=0.76%, sys=8.08%, ctx=8191, majf=0, minf=5
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=3725/d=0, short=r=0/w=0/d=0
latency : target=0, window=0, percentile=100.00%, depth=1
randrwrite: (groupid=0, jobs=1): err= 9 (file:engines/sync.c:67,
func=xfer, error=Bad file descriptor): pid=10453: Mon Mar 31 18:05:26
2014
write: io=3072.0KB, bw=581465B/s, iops=142, runt= 5410msec
clat (usec): min=587, max=33827, avg=1817.50, stdev=2464.14
lat (usec): min=593, max=33837, avg=1823.85, stdev=2464.47
clat percentiles (usec):
| 1.00th=[ 804], 5.00th=[ 876], 10.00th=[ 932], 20.00th=[ 988],
| 30.00th=[ 1048], 40.00th=[ 1096], 50.00th=[ 1208], 60.00th=[ 2024],
| 70.00th=[ 2224], 80.00th=[ 2352], 90.00th=[ 2576], 95.00th=[ 2896],
| 99.00th=[ 4080], 99.50th=[32640], 99.90th=[34048], 99.95th=[34048],
| 99.99th=[34048]
bw (KB /s): min= 165, max= 1266, per=25.28%, avg=595.00, stdev=450.04
lat (usec) : 750=0.39%, 1000=22.76%
lat (msec) : 2=36.67%, 4=38.88%, 10=0.52%, 20=0.13%, 50=0.52%
cpu : usr=0.15%, sys=5.69%, ctx=2288, majf=0, minf=0
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=0.1%, 4=99.9%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=769/d=0, short=r=0/w=0/d=0
latency : target=0, window=0, percentile=100.00%, depth=1
randrwrite: (groupid=0, jobs=1): err= 9 (file:engines/sync.c:67,
func=xfer, error=Bad file descriptor): pid=10454: Mon Mar 31 18:05:26
2014
write: io=2528.0KB, bw=478497B/s, iops=117, runt= 5410msec
clat (usec): min=299, max=33920, avg=2106.79, stdev=3775.38
lat (usec): min=303, max=33930, avg=2113.60, stdev=3775.68
clat percentiles (usec):
| 1.00th=[ 564], 5.00th=[ 820], 10.00th=[ 932], 20.00th=[ 996],
| 30.00th=[ 1064], 40.00th=[ 1160], 50.00th=[ 1256], 60.00th=[ 1976],
| 70.00th=[ 2224], 80.00th=[ 2384], 90.00th=[ 2672], 95.00th=[ 3056],
| 99.00th=[33024], 99.50th=[33024], 99.90th=[34048], 99.95th=[34048],
| 99.99th=[34048]
bw (KB /s): min= 46, max= 728, per=18.61%, avg=438.17, stdev=265.37
lat (usec) : 500=0.16%, 750=3.63%, 1000=16.59%
lat (msec) : 2=39.81%, 4=37.28%, 10=0.63%, 20=0.32%, 50=1.42%
cpu : usr=0.30%, sys=5.03%, ctx=2048, majf=0, minf=2
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=0.2%, 4=99.8%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=633/d=0, short=r=0/w=0/d=0
latency : target=0, window=0, percentile=100.00%, depth=1
randrwrite: (groupid=0, jobs=1): err= 9 (file:engines/sync.c:67,
func=xfer, error=Bad file descriptor): pid=10455: Mon Mar 31 18:05:26
2014
write: io=3052.0KB, bw=583286B/s, iops=142, runt= 5358msec
clat (usec): min=541, max=24712, avg=1707.90, stdev=1533.18
lat (usec): min=547, max=24743, avg=1714.89, stdev=1533.64
clat percentiles (usec):
| 1.00th=[ 796], 5.00th=[ 876], 10.00th=[ 908], 20.00th=[ 980],
| 30.00th=[ 1048], 40.00th=[ 1128], 50.00th=[ 1240], 60.00th=[ 1736],
| 70.00th=[ 2224], 80.00th=[ 2384], 90.00th=[ 2640], 95.00th=[ 2896],
| 99.00th=[ 3280], 99.50th=[ 4640], 99.90th=[24704], 99.95th=[24704],
| 99.99th=[24704]
bw (KB /s): min= 204, max= 1009, per=20.39%, avg=480.00, stdev=283.93
lat (usec) : 750=0.65%, 1000=22.12%
lat (msec) : 2=38.35%, 4=38.09%, 10=0.26%, 50=0.39%
cpu : usr=0.37%, sys=5.45%, ctx=2261, majf=0, minf=5
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=0.1%, 4=99.9%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=764/d=0, short=r=0/w=0/d=0
latency : target=0, window=0, percentile=100.00%, depth=1
Run status group 0 (all jobs):
WRITE: io=23552KB, aggrb=2354KB/s, minb=467KB/s, maxb=1489KB/s,
mint=5358msec, maxt=10001msec
Disk stats (read/write):
sda: ios=0/13818, merge=0/2227, ticks=0/7428, in_queue=7260, util=72.37%
Is file sharing with non-trivial lockfile= setting is expected to work
with threads=1, or is it an unanticipated use case?
