On Saturday 10 March 2007 05:27, Matt Mackall wrote: > On Fri, Mar 09, 2007 at 07:39:05PM +1100, Con Kolivas wrote: > > On Friday 09 March 2007 19:20, Matt Mackall wrote: > > > And I've just rebooted with NO_HZ and things are greatly improved. At > > > idle, Beryl effects are silky smooth (possibly better than stock) and > > > shows less load. Under 'make', Beryl is still responsive as is Galeon. > > > No sign of lagging mouse or typing. > > > > > > Under make -j 5, things are intermittent. Galeon scrolling is > > > sometimes still responsive, but Beryl, terminals and mouse still drag > > > quite a bit. > > > > I just replied before you sent this one out I think our messages passed > > each other across the ocean somewhere. I don't quite get what combination > > of factors you're saying here caused great improvement. Was it enabling > > NO_HZ on mainline cpu scheduler or disabling NO_HZ or on RSDL? > > Turning on NO_HZ on RSDL greatly improved it. I have not tried NO_HZ > on mainline. The first test was with NO_HZ=n, the second was with > NO_HZ=y.
How odd. I would have thought that if an interaction was to occur it would have been without the new feature. Clearly what you describe without NO_HZ is not the expected behaviour with RSDL. I wonder what went wrong. Are you on 100HZ on that laptop? While I expect 100HZ should be ok, it might just not be... My laptop is about the same performance and works fine with 100HZ under load of all sorts BUT I don't have Beryl (which I would have thought swayed things in the opposite direction also). > As an aside, we should not name config options NO_* or DISABLE_* > because of the potential for double negation. Case in point, I couldn't figure out what you were saying :) -- -ck - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
