On Saturday 10 March 2007 12:42, Matt Mackall wrote: > On Sat, Mar 10, 2007 at 12:28:38PM +1100, Con Kolivas wrote: > > On Saturday 10 March 2007 11:49, Matt Mackall wrote: > > > On Sat, Mar 10, 2007 at 11:34:26AM +1100, Con Kolivas wrote: > > > > Ok, so some of the basics then. Can you please give me the output of > > > > 'top -b' running for a few seconds during the whole affair? > > > > > > Here you go: > > > > > > http://selenic.com/baseline > > > http://selenic.com/underload > > > > > > This is with 2.6.20+rsdl+tickfix at HZ=250. > > > > > > Something I haven't mentioned about my setup is that I'm using ccache. > > > And it turns out disabling ccache makes a large difference. Going to > > > switch back to a NO_HZ kernel and see what that looks like. > > > > Your X is reniced to -10 so.... try again with X nice 0 please. > > Doh, can't believe I didn't notice that. That's apparently a default > in Debian/unstable (not sure where to tweak it).
See other email from Kyle on how to dpkg reconfigure. I submitted a bug report to debian years ago about this and I presume it was fixed but you've probably slowly dist upgraded from an older version and it stayed in your config? > Reniced: > > without ccache with ccache > make -j 5 > beryl good ok > galeon ok/good ok > mp3 good good > terminal good ok > mouse good ok Progress at last! And without any patches! Well those look very reasonable to me. Especially since -j5 is a worst case scenario. > We're still left with a big unexplained ccache differential, But would you say it's still _adequate_ with ccache considering you only have 1/6th cpu left for X? With and without ccache it's quite a different workload so they will behave differently. > and a big > NO_HZ vs HZ=250 differential. That part I don't know about. You've only tested the difference with X running nice -10. I need to look further at the mechanism for -nice tasks. It should be possible to run smoothly even with a -niced X (although that was never my intent) so perhaps that's not working properly. I'll look into that. Thanks! -- -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/
