On Wed, Mar 20, 2002 at 04:32:15PM +1100, Zenaan Harkness wrote: > On Tue, Mar 19, 2002 at 11:15:12PM -0500, Paul Davis wrote: > > >I am getting the same with stock 2.4.18, DELL Inspiron laptop (Maestro > > >3i), my test is: > > > > > >copy a cd image file from one partition to another, while trying to play > > >an mp3 using mpg123. > > > > > >The mp3 skips all over the place. > > > > since you almost certainly have IDE drivers, have you configured them > > correctly using hdparm? these are source of considerable scheduling > > latency, in ways that AFAIK are not improved by any of the "latency > > reducing" patches available. don't ask me how to configure them - i > > only use SCSI drives - but a quick google search should reveal > > relevant advice. > > thanks > > hdparm improves the situation, but I still get some (minimal) skips now: > > zen8100a:~# hdparm /dev/hda > > /dev/hda: > multcount = 16 (on) > I/O support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 1 (on) > keepsettings = 0 (off) > nowerr = 0 (off) > readonly = 0 (off) > readahead = 8 (on) > geometry = 7296/255/63, sectors = 117210240, start = 0 > busstate = 1 (on) > > > My current 'test': > - playing an mp3 > - running make clean && make bzImage > - copying a cd image between two partitions > - loading up the odd application (eg. mozilla) > > With hdparm settings I've tried: > - 2.4.18 + preempt + lockbreak > - 2.4.18 + lowlatency > - 2.4.19-pre3-ac3 + preempt > > These seem to all give the same minimal skips with above activities. > > No skips with only the kernel compile (not doing the large copy).
CORRECTION: Just retested with full hdparm (added -u setting) settings on 2.4.19-pre3-ac+preempt, and no skipping with above activities. This seems pretty good. I could generate skips when switching from X to text console. Could not generate skip when cycling virtual desktops within X (at high key repeat rate). Again this seems pretty good. thanks zen _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
