On 4/23/05, Ivor Hewitt <[EMAIL PROTECTED]> wrote: > The gcc compiler hasn't got any scheduling logic for the c3 since via > hasn't released that information or contributed to the gcc > development..... and since the c3 design is based off the old cyrix > dies I suspect that the 586 optimisations might be a reasonable match. > > -Os is all very well but that just tries to pack everything into the > smallest space and so disables all word alignment and doesn't try to > optimise the code for speed. -O2 seems like a reasonable compromise > for the c3. It doesn't unroll loops but does do some optimisations. > > Personally I always found "586 and -O2" gave decent performance... > with the added benefit I can use the same binaries on P3, C3 and C3-2 > which helps testing and debugging (for me). > > If I have time I might run some benchmarks with different options. > > > On 4/22/05, Devan Lippman <[EMAIL PROTECTED]> wrote: > > I'd have to agree with Ivor's flag settings, I've found on my TC that > > i586 works better than C3 > > > > On 4/22/05, Ivor Hewitt <[EMAIL PROTECTED]> wrote: > > > On 4/22/05, Neale Swinnerton <[EMAIL PROTECTED]> wrote: > > > > Hi, > > > > > > > > I've got a Epia ME6000 working well as a Myth frontend. I've got the > > > > XvMC playback so that watching Live TV or recordings is great (I've got > > > > a backend with 2 x Hauppauge DVB-T cards). > > > > > > > 1. I'd have thought an m6000 would struggle. Out of interest what cpu > > > load are you seeing in mplayer? > > > 2. Why are you transcoding dvb-t recordings anyway? do you really need > > > to save disk space that badly. Wouldn't you rather watch the original > > > quality? > > > > > > > -march=c3 -Os -fomit-frame-pointer > > > > > > > What about just -march=i586 -O2 > > > _______________________________________________ > > > mythtv-users mailing list > > > [email protected] > > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > > > > > > > > > -- > > Thanks, > > Devan Lippman <[EMAIL PROTECTED]> > > > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users >
I did a comparison of compiler optimization settings for the ME6000 and M10000. The results are mixed. You can find the articles on www.magicitx.com under the VIA Epia menu -> Optimization if you're interested. -- Tim www.magicitx.com _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
