[Devel] Re: Performance numbers with IO throttling patches (Was: Re: IO scheduler based IO controller V10)

2009-10-17 Thread Andrea Righi
On Mon, Oct 12, 2009 at 05:11:20PM -0400, Vivek Goyal wrote: [snip] I modified my report scripts to also output aggreagate iops numbers and remove max-bandwidth and min-bandwidth numbers. So for same tests and same results I am now reporting iops numbers also. ( I have not re-run the tests.)

[Devel] Re: Performance numbers with IO throttling patches (Was: Re: IO scheduler based IO controller V10)

2009-10-12 Thread Vivek Goyal
On Sun, Oct 11, 2009 at 12:27:30AM +0200, Andrea Righi wrote: [..] Multiple Random Reader vs Sequential Reader === Generally random readers bring the throughput down of others in the system. Ran a test to see the impact of increasing number of

[Devel] Re: Performance numbers with IO throttling patches (Was: Re: IO scheduler based IO controller V10)

2009-10-11 Thread Vivek Goyal
On Sun, Oct 11, 2009 at 12:27:30AM +0200, Andrea Righi wrote: [..] - Andrea, can you please also run similar tests to see if you see same results or not. This is to rule out any testing methodology errors or scripting bugs. :-). I also have collected the snapshot of some cgroup

[Devel] Re: Performance numbers with IO throttling patches (Was: Re: IO scheduler based IO controller V10)

2009-10-10 Thread Andrea Righi
On Sat, Oct 10, 2009 at 03:53:16PM -0400, Vivek Goyal wrote: On Thu, Sep 24, 2009 at 02:33:15PM -0700, Andrew Morton wrote: [..] Environment == A 7200 RPM SATA drive with queue depth of 31. Ext3 filesystem. That's a bit of a toy. Do we have testing results for more