Messages in this thread | | | Date | Fri, 23 Jul 2010 10:13:03 -0400 | From | Vivek Goyal <> | Subject | Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group_idle tunable |
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On Fri, Jul 23, 2010 at 04:03:43PM +0200, Heinz Diehl wrote: > On 23.07.2010, Vivek Goyal wrote: > > > This is V4 of the patchset which implements a new tunable group_idle and also > > implements IOPS mode for group fairness. Following are changes since V3. > [....] > > Just for information: this patchset, applied to 2.6.35-rc6, gives about > 20-25% increase in speed/throughput on my desktop system > (Phenom 2.5GHz Quadcore, 3 disks) with the tunables set according > to what you've used/reported here (the setup with slice_idle set to 0), > and it's measurable with fs_mark, too. > > After 2 hours of hard testing, the machine remains stable and responsive.
Thanks for some testing Heinz. I am assuming you are not using cgroups and blkio controller.
In that case, you are seeing improvements probably due to first patch where we don't idle on service tree if slice_idle=0. Hence we cut down on overall idling and can see throughput incrase.
What kind of configuration these 3 disks are on your system? Some Hardare RAID or software RAID ?
Thanks Vivek
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