On Mon, Feb 10, 2014 at 3:15 PM, Jens Axboe <axboe@xxxxxxxxx> wrote:
>> To be honest I'm not sure how to apply a patch. Thus far I have only
>> used release versions of fio. Do I need to get fio from git, apply
>> the patch, and then compile?
>
>
> The easiest would be:
>
> $ git clone git://git.kernel.dk/fio
>
> Then save the patch from mail in a file, eg /tmp/patch. Then do:
>
> $ cd fio
> $ patch -p1 --dry-run < /tmp/patch
>
> If the patch command spews any errors, the most likely explanation is that
> your mailer mangled it somehow. You can try and add -l and see if that makes
> patch happier, it'll ignore white space then.
>
> Assuming that worked, just do:
>
> $ ./configure
> $ make
>
> and re-run with ./fio and your job file.
>
> --
> Jens Axboe
Jens, thanks a lot for your help. Here is the output from fio from
git + your patch. Looks correct except that write io should be 1024
MB instead of 1000 MB?
job: (g=0): rw=write, bs=1M-1M/1M-1M/1M-1M, ioengine=sync, iodepth=1
fio-2.1.4-48-gea66
Starting 1 process
job: Laying out IO file(s) (50 file(s) / 1024MB)
Jobs: 1 (f=10)
job: (groupid=0, jobs=1): err= 0: pid=7286: Mon Feb 10 15:56:16 2014
write: io=1000.0MB, bw=546425KB/s, iops=533, runt= 1874msec
clat (usec): min=331, max=18665, avg=1845.86, stdev=3825.28
lat (usec): min=342, max=18676, avg=1861.42, stdev=3825.89
clat percentiles (usec):
| 1.00th=[ 338], 5.00th=[ 346], 10.00th=[ 354], 20.00th=[ 378],
| 30.00th=[ 430], 40.00th=[ 438], 50.00th=[ 466], 60.00th=[ 628],
| 70.00th=[ 652], 80.00th=[ 668], 90.00th=[ 9152], 95.00th=[13120],
| 99.00th=[14784], 99.50th=[15424], 99.90th=[18304], 99.95th=[18560],
| 99.99th=[18560]
bw (KB /s): min=374784, max=999424, per=100.00%, avg=585045.33,
stdev=358875.60
lat (usec) : 500=52.90%, 750=35.60%
lat (msec) : 10=2.70%, 20=8.80%
cpu : usr=4.38%, sys=24.07%, ctx=250, majf=0, minf=33
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=1000/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=1000.0MB, aggrb=546424KB/s, minb=546424KB/s,
maxb=546424KB/s, mint=1874msec, maxt=1874msec
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