On Wed, 2013-01-23 at 17:26 +0800, Michael Wang wrote: > On 01/23/2013 05:18 PM, Mike Galbraith wrote: > > On Wed, 2013-01-23 at 17:00 +0800, Michael Wang wrote: > >> On 01/23/2013 04:49 PM, Mike Galbraith wrote: > >>> On Wed, 2013-01-23 at 16:30 +0800, Michael Wang wrote: > >>>> On 01/23/2013 04:20 PM, Mike Galbraith wrote: > >>>>> On Wed, 2013-01-23 at 15:10 +0800, Michael Wang wrote: > >>>>>> On 01/23/2013 02:28 PM, Mike Galbraith wrote: > >>>>> > >>>>>>> Abbreviated test run: > >>>>>>> Tasks jobs/min jti jobs/min/task real cpu > >>>>>>> 640 158044.01 81 246.9438 24.54 577.66 Wed Jan > >>>>>>> 23 07:14:33 2013 > >>>>>>> 1280 50434.33 39 39.4018 153.80 5737.57 Wed Jan > >>>>>>> 23 07:17:07 2013 > >>>>>>> 2560 47214.07 34 18.4430 328.58 12715.56 Wed Jan > >>>>>>> 23 07:22:36 2013 > >>>>>> > >>>>>> So still not works... and not going to balance path while waking up > >>>>>> will > >>>>>> fix it, looks like that's the only choice if no error on balance path > >>>>>> could be found...benchmark wins again, I'm feeling bad... > >>>>>> > >>>>>> I will conclude the info we collected and make a v3 later. > >>>>> > >>>>> FWIW, I hacked virgin to do full balance if an idle CPU was not found, > >>>>> leaving the preference to wake cache affine intact though, turned on > >>>>> WAKE_BALANCE in all domains, and it did not collapse. In fact, the high > >>>>> load end, where the idle search will frequently be a waste of cycles, > >>>>> actually improved a bit. Things that make ya go hmmm. > >>>> > >>>> Oh, does that means the old balance path is good while the new is really > >>>> broken, I mean, compared this with the previously results, could we say > >>>> that all the collapse was just caused by the change of balance path? > >>> > >>> That's a good supposition. I'll see if it holds. > >> > >> I just notice that there is no sd support the WAKE flag at all according > >> to your debug info, isn't it? > > > > There is, I turned it on in all domains.
? Virgin doesn't have any of your patches. In virgin, I can twiddle flags effectively with a script. With your patches, I have to make that happen from the start for it to be effective, but not in virgin (well nearly virgin) 3.8-rc3. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
