Messages in this thread | | | From | Luca Zini <> | Subject | Re: scheduler vs hardware? (was Re: another i7 (linux) bug?) | Date | Fri, 22 Jan 2010 21:15:00 +0100 |
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vanilla 33-rc5 runs ok: with nice set to -20 real 0m8.649s user 0m8.600s sys 0m0.030s
with nice set to 19: real 0m8.658s user 0m8.600s sys 0m0.040s
thank you! Luca
On Friday 22 January 2010 08:19:18 am Mike Galbraith wrote: > > if I run a cpu intensive process with the lowest priority (19 > > from man nice) I obtain much better performance that with the > > highest priority available (-20 from man nice). > > > > For example the same file is processed by lame in 8.7 seconds > > at the lowest priority, and in 12 seconds at the highest > > priority. Before posting a bug I wold like to understand if > > this is a problem related to the i7 mobile (my processor is a > > i7 Q720). > > > > As far as I tested on the same laptop series (dell studio 15), > > with the same kernel this problem does not exists. > > So you only see this on the i7. That's odd. Can you try 33-rc5? > > Posting a reliable reproducer would be nice. It'd also be nice to see > what all is running when you see this, and where. > > -Mike >
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