Re: [linux-audio-dev] NPTL/2.6 (was snd-hdsp oddities)
--- Fernando Pablo Lopez-Lezcano <[EMAIL PROTECTED]> wrote: > On Mon, 2004-07-05 at 09:24, Michael Ost wrote: > > On Thu, 2004-07-01 at 19:16, Paul Davis wrote: > > > When the dust settles from the kernel and NPTL, 2.6 will be > more > > > viable. Right now, even though it works for some people, its > not a > > > generally viable platform for realtime audio. > > > > What sort of issues are you seeing with NPTL and the 2.6 kernel? > Are > > there stability problems? Functionality problems? I thought I had > heard > > the NPTL/2.6 was working fine. > > What I'm seeing is, sometimes, xrun storms (this is using 2.6.7 + > some > extra patches, lsm for realtime as non-root, recent alsa, qjackctl > for > starting and running jack). One of them I think I have tracked to > an app > running into denormal problems on a PIV. I still don't know for > sure > which part of the system is contributing to the problem (jack / > nptl / > alsa). On the same hardware with an older glibc and 2.4.x with low > latency patches I don't see the same problems (but the whole distro > is > different, FC1 vs FC2). > > Some users have had good experiences with 2.6.x by turning off nptl > with > the LD_ASSUME_KERNEL trick, but they get lousy performance (ie: > lots of > xruns) with nptl on. > > -- Fernando > > >
Re: [linux-audio-dev] NPTL/2.6 (was snd-hdsp oddities)
On Mon, 2004-07-05 at 09:24, Michael Ost wrote: > On Thu, 2004-07-01 at 19:16, Paul Davis wrote: > > When the dust settles from the kernel and NPTL, 2.6 will be more > > viable. Right now, even though it works for some people, its not a > > generally viable platform for realtime audio. > > What sort of issues are you seeing with NPTL and the 2.6 kernel? Are > there stability problems? Functionality problems? I thought I had heard > the NPTL/2.6 was working fine. What I'm seeing is, sometimes, xrun storms (this is using 2.6.7 + some extra patches, lsm for realtime as non-root, recent alsa, qjackctl for starting and running jack). One of them I think I have tracked to an app running into denormal problems on a PIV. I still don't know for sure which part of the system is contributing to the problem (jack / nptl / alsa). On the same hardware with an older glibc and 2.4.x with low latency patches I don't see the same problems (but the whole distro is different, FC1 vs FC2). Some users have had good experiences with 2.6.x by turning off nptl with the LD_ASSUME_KERNEL trick, but they get lousy performance (ie: lots of xruns) with nptl on. -- Fernando
Re: [linux-audio-dev] NPTL/2.6 (was snd-hdsp oddities)
On Thu, 2004-07-01 at 19:16, Paul Davis wrote: > When the dust settles from the kernel and NPTL, 2.6 will be more > viable. Right now, even though it works for some people, its not a > generally viable platform for realtime audio. What sort of issues are you seeing with NPTL and the 2.6 kernel? Are there stability problems? Functionality problems? I thought I had heard the NPTL/2.6 was working fine. Cheers... mo
