Messages in this thread | | | From | Alistair John Strachan <> | Subject | Re: md mirror / ext3 / dual core performance strange phenomenon? | Date | Mon, 14 Aug 2006 15:48:50 +0100 |
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On Monday 14 August 2006 14:26, Erik Slagter wrote: > On ma, 2006-08-14 at 23:22 +1000, Keith Owens wrote: > > >BUT... starting from -j4 (and upwards) the compile time suddenly goes to > > >3.5 minutes! > > > > Nothing to do with the disks, it is a design flaw in the kernel build > > system. If you want a useful parallel make using -j<n>, set <n> to 3, > > 4 or 5 higher than the real number of parallel jobs that you want. The > > exact value to add depends on which kernel tree you are building. See > > http://marc.theaimsgroup.com/?l=linux-kernel&m=115553906404695&w=2 > > Okay, so it basically means I shouldn't worry here. > > Sorry for bothering, I couldn't come up with a proper search term...
I find that for mainline, using an odd number of jobs works better. I can get my X2 3800+ to full saturation with -j5.
-- Cheers, Alistair.
Final year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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