Hi everyone,
I am having a problem using iolog files to generate I/O. The attached
test_fio file and spc_bsu0_str3 iolog files should run together to
generate 6 reads and 10 writes on /mnt/xphost/asu1. Fio runs via
fio test_fio
and generates the following output that looks good
stream0: (groupid=0, jobs=1): err= 0: pid=19187
read : io=24,576B, bw=18,745B/s, iops=4, runt= 1311msec
clat (usec): min=35, max=564, avg=125.17, stdev=214.99
bw (KB/s) : min= 12, max= 31, per=119.44%, avg=21.50, stdev=13.44
write: io=40,960B, bw=31,243B/s, iops=7, runt= 1311msec
clat (usec): min=25, max=72, avg=49.00, stdev=12.35
bw (KB/s) : min= 25, max= 25, per=83.33%, avg=25.00, stdev= 0.00
cpu : usr=0.00%, sys=0.31%, ctx=27, majf=0, minf=22
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=6/10, short=0/0
lat (usec): 50=62.50%, 100=31.25%, 750=6.25%
Run status group 0 (all jobs):
READ: io=24KB, aggrb=18KB/s, minb=18KB/s, maxb=18KB/s, mint=1311msec,
maxt=1311msec
WRITE: io=40KB, aggrb=30KB/s, minb=31KB/s, maxb=31KB/s, mint=1311msec,
maxt=1311msec
Also, if I use inotifywatch shows the correct number of access and
modify (read and write) on /mnt/xphost/asu1. However, iotop shows that
only 8KB of reads and 8KB of writes have been performed by the IO
generating process...! I have run soe other tests and fio shows much
better performance than expected because it is only generating a small
fraction of the requested IO. I have been tinkering with the fio code,
so I'm worried I broke something and would like to know what. Can anyone
help?
Kind regards, Mike
[global]
#ioengine=libaio
ioengine=sync
rw=randrw
#directory=/home/mosu001
read_iolog=spc_bsu0_str3
#refill_buffers=1
#direct=1
[stream0]
fio version 2 iolog
/mnt/xphost/asu1 add
/mnt/xphost/asu2 add
/mnt/xphost/asu3 add
/mnt/xphost/asu1 open
/mnt/xphost/asu2 open
/mnt/xphost/asu3 open
Until wait 118 0
/mnt/xphost/asu1 read 187572 4096
Until wait 123 0
/mnt/xphost/asu1 write 187348 4096
Until wait 255 0
/mnt/xphost/asu1 write 187282 4096
Until wait 290 0
/mnt/xphost/asu1 read 187091 4096
Until wait 310 0
/mnt/xphost/asu1 read 187564 4096
Until wait 335 0
/mnt/xphost/asu1 write 187565 4096
Until wait 350 0
/mnt/xphost/asu1 write 187345 4096
Until wait 566 0
/mnt/xphost/asu1 write 187219 4096
Until wait 571 0
/mnt/xphost/asu1 write 187475 4096
Until wait 621 0
/mnt/xphost/asu1 read 187539 4096
Until wait 960 0
/mnt/xphost/asu1 read 187492 4096
Until wait 1218 0
/mnt/xphost/asu1 write 187164 4096
Until wait 1251 0
/mnt/xphost/asu1 read 187539 4096
Until wait 1284 0
/mnt/xphost/asu1 write 187500 4096
Until wait 1374 0
/mnt/xphost/asu1 write 187217 4096
Until wait 1422 0
/mnt/xphost/asu1 write 186252 4096
/mnt/xphost/asu1 close
/mnt/xphost/asu2 close
/mnt/xphost/asu3 close
