Re: 2.6.21-rc3-mm1 RSDL results

[Matt Mackall]

On Sat, Mar 10, 2007 at 10:02:37AM +1100, Con Kolivas wrote:
> On Saturday 10 March 2007 09:29, Matt Mackall wrote:
> > On Sat, Mar 10, 2007 at 09:18:05AM +1100, Con Kolivas wrote:
> > > On Saturday 10 March 2007 08:57, Con Kolivas wrote:
> > > > On Saturday 10 March 2007 08:39, Matt Mackall wrote:
> > > > > So what's different between makes in parallel and make -j 5? Make's
> > > > > job server uses pipe I/O to control how many jobs are running.
> > > >
> > > > Hmm it must be those deep pipes again then. I removed any quirks
> > > > testing for those from mainline as I suspected it would be ok. Guess
> > > > I"m wrong.
> > >
> > > I shouldn't blame this straight up though if NO_HZ makes it better.
> > > Something else is going wrong... wtf though?
> >
> > Just so we're clear, dynticks has only 'fixed' the single non-parallel
> > make load so far.
> 
> Ok, back to the pipe idea. Without needing a kernel recompile, can you try 
> running the make -j5 as a SCHED_BATCH task?

Seems the same.

Oddly, nice make -j 5 is better than batch (but not quite up to stock).

-- 
Mathematics is the supreme nostalgia of our time.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/