Demetri,
I think you may be the only person (besides myself) that has tried to
use "foreach". The problem isn't the "foreach" command though, it is
that "run 10" shuts down processes when it finishes and re-running from
the same "f" script doesn't work. I have two suggestions:
1) create a .prof profile to do this. See the example .prof files in
filebench/config, with filemacro.prof being the best example to look at.
Observe how it runs oltp.f four times with different I/O sizes and
caching parameters. A similar .prof file would work fine for you, where
each run would set iosize to either 8k, 16k or 64k.
2) alternatively, you need to explicitly do what "run" does, separated
into before and after bits, as well as inside the foreach command:
create files
foreach $iosize in 8k, 16k, 64k
{
create processes
stats clear
sleep 120
stats snap
stats dump
}
shutdown processes
quit
This "should" work, though I have never actually tried it.
If you try it, let me know if it works!
Drew
On 12/02/08 08:34, Demetri S. Mouratis wrote:
> Gang,
>
> I'm having trouble getting the 'foreach' syntax to loop through different I/O
> sizes. Here is a sample of code I'm trying to get working:
>
> #!/opt/filebench/bin/go_filebench -f
> #
> define file name=data, path=/filebench/local, size=128m, prealloc, reuse
> define process name=randWriteProcess,instances=1
> {
> thread name=randWriteThread1, memsize=8m, instances=1
> {
> flowop write name=randWriter1, filename=data, iosize=$iosize, random
> }
> }
>
> foreach $iosize in 8k, 16k, 64k
> {
> run 10
> }
>
> But it hangs on the second iteration:
>
> $ ./foreach.f
> FileBench Version 1.3.4
> 27404: 0.030: Iterating $iosize=8192
> 27404: 0.030: Creating/pre-allocating files and filesets
> 27404: 0.042: File data: mbytes=128
> 27404: 0.042: Re-using file data.
> 27404: 0.043: Creating file data...
> 27404: 0.063: Preallocated 1 of 1 of file data in 1 seconds
> 27404: 0.063: waiting for fileset pre-allocation to finish
> 27404: 0.064: Starting 1 randWriteProcess instances
> 27405: 1.069: Starting 1 randWriteThread1 threads
> 27404: 4.078: Running...
> 27404: 14.178: Run took 10 seconds...
> 27404: 14.180: Per-Operation Breakdown
> randWriter1 854ops/s 6.6mb/s 1.0ms/op 112us/op-cpu
>
> 27404: 14.180:
> IO Summary: 8627 ops 854.3 ops/s, (0/854 r/w) 6.6mb/s, 336us
> cpu/op, 1.0ms latency
> 27404: 14.180: Shutting down processes
> 27404: 17.208: Iterating $iosize=16384
> 27404: 17.209: Creating/pre-allocating files and filesets
> 27404: 17.209: File data: mbytes=128
> 27404: 17.209: Re-using file data.
> 27404: 17.209: Creating file data...
> 27404: 19.619: Preallocated 1 of 1 of file data in 3 seconds
> 27404: 19.619: waiting for fileset pre-allocation to finish
>
> [hangs forever, calling nanosleep once a second]
>
> There are no foreach examples in filebench/workloads, so I'm wondering if
> other people are having success with this.
>
> ...Demetri
>
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