[LAD] Re: Status of Pipewire - Ryzen 5
On Fri, Feb 10, 2023 at 06:32:36PM +, Will Godfrey wrote: > On Thu, 9 Feb 2023 20:18:59 + > John Rigg wrote: > >Have you turned off hyperthreading on the Ryzen system (usually called SMT in > >BIOS settings on AMD)? I keep SMT turned off on my Ryzen systems to avoid > >possible scheduling problems. So far no problems with 6.x kernels with > >dynamic > >preempt enabled. > > > OK. That works thanks. Strange it wasn't needed for kernel 5.10. The scheduler was modified to allow dynamic preemption (preemption can be turned on and off with kernel command line), starting with 5.12 kernel. John ___ Linux-audio-dev mailing list -- linux-audio-dev@lists.linuxaudio.org To unsubscribe send an email to linux-audio-dev-le...@lists.linuxaudio.org
[LAD] Re: Status of Pipewire - Ryzen 5
On Thu, 9 Feb 2023 20:18:59 +
John Rigg wrote:
>On Thu, Feb 09, 2023 at 02:33:18PM +, Will Godfrey wrote:
>>
>> Something that may (or may not be related)
>> There seems to be something odd with Linux image 6.1 preempt
>>
>> On a Ryzen 5, Rosegarden keeps randomly losing the transport timer
>> sometimes freezing for nearly a second (then blasts poor yoshimi with bunches
>> of notes on all 16 channels). This doesn't happen with the 'normal' 6.1
>> kernel,
>> nor does it happen with 5.10 preempt.
>>
>> However the exact same setup on an older Intel Pentium has no problems at
>> all.
>
>Have you turned off hyperthreading on the Ryzen system (usually called SMT in
>BIOS settings on AMD)? I keep SMT turned off on my Ryzen systems to avoid
>possible scheduling problems. So far no problems with 6.x kernels with dynamic
>preempt enabled.
>
>John
OK. That works thanks. Strange it wasn't needed for kernel 5.10.
--
Will J Godfrey {apparently now an 'elderly'}
https://willgodfrey.bandcamp.com/
http://yoshimi.github.io
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
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[LAD] Re: Status of Pipewire - Ryzen 5
On Thu, Feb 09, 2023 at 02:33:18PM +, Will Godfrey wrote: > > Something that may (or may not be related) > There seems to be something odd with Linux image 6.1 preempt > > On a Ryzen 5, Rosegarden keeps randomly losing the transport timer > sometimes freezing for nearly a second (then blasts poor yoshimi with bunches > of notes on all 16 channels). This doesn't happen with the 'normal' 6.1 > kernel, > nor does it happen with 5.10 preempt. > > However the exact same setup on an older Intel Pentium has no problems at all. Have you turned off hyperthreading on the Ryzen system (usually called SMT in BIOS settings on AMD)? I keep SMT turned off on my Ryzen systems to avoid possible scheduling problems. So far no problems with 6.x kernels with dynamic preempt enabled. John ___ Linux-audio-dev mailing list -- linux-audio-dev@lists.linuxaudio.org To unsubscribe send an email to linux-audio-dev-le...@lists.linuxaudio.org
