Re: No 6.5.10-4 realtime kernel?
Le mardi 14 novembre 2023, 16:15:53 CET Scott Denlinger a écrit : > Thanks for the LWN reference. I think I missed that article. I plan to > install the newest kernel in Trixie, then run the rtcqs script ( > https://codeberg.org/rtcqs/rtcqs) to see how it looks for audio processing. > Based on that, I may still try to install a fully preemptible kernel from > source. > > Scott Denlinger On my PC, rtcqs shows me that the kernel is not Tickless (CONFIG_NO_HZ). Tickless Kernel === [ WARNING ] Tickless timer support is not not set. Try enabling tickless timer support (CONFIG_NO_HZ_IDLE, or CONFIG_NO_HZ in older kernels)
Re: No 6.5.10-4 realtime kernel?
Thanks for the LWN reference. I think I missed that article. I plan to install the newest kernel in Trixie, then run the rtcqs script ( https://codeberg.org/rtcqs/rtcqs) to see how it looks for audio processing. Based on that, I may still try to install a fully preemptible kernel from source. Scott Denlinger On Tue, Nov 14, 2023 at 7:00 AM Tixy wrote: > On Mon, 2023-11-13 at 20:45 +0100, Gilles Mocellin wrote: > > > On Sun, Nov 12, 2023 at 10:04 AM Scott Denlinger > > > > > > wrote: > > > > Does anyone know why there are no stock realtime kernels in > trixie/sid? I > > > > currently have 'linux-image-6.5.0-1-rt-amd64-unsigned' installed, > but I > > > > don't see any newer RT kernels available. > > > > > > > > Scott Denlinger > > > > Hello, I also was looking for it, but I've seen that the standard kernel > seems > > to have some preemptive patch (dynamic ?) : > > > > So I think the kernel packagers think it's sufficient ? > > Quoting a recent article from LWN [1] > >PREEMPT_DYNAMIC, was added to the 5.12 kernel by Michal Hocko in >2021. It allows the preemption choice to be deferred until boot >time, where any of the modes except PREEMPT_RT can be selected by >the preempt= command-line parameter. PREEMPT_DYNAMIC allows >distributors to ship a single kernel while letting users pick the >preemption mode that works best for their workload. > > So if you specificity need a real-time kernel this won't give it to > you. > > [1] https://lwn.net/Articles/944686/ > > -- > Tixy > >
Re: No 6.5.10-4 realtime kernel?
On Mon, 2023-11-13 at 20:45 +0100, Gilles Mocellin wrote: > > On Sun, Nov 12, 2023 at 10:04 AM Scott Denlinger > > > > wrote: > > > Does anyone know why there are no stock realtime kernels in trixie/sid? I > > > currently have 'linux-image-6.5.0-1-rt-amd64-unsigned' installed, but I > > > don't see any newer RT kernels available. > > > > > > Scott Denlinger > > Hello, I also was looking for it, but I've seen that the standard kernel > seems > to have some preemptive patch (dynamic ?) : > > So I think the kernel packagers think it's sufficient ? Quoting a recent article from LWN [1] PREEMPT_DYNAMIC, was added to the 5.12 kernel by Michal Hocko in 2021. It allows the preemption choice to be deferred until boot time, where any of the modes except PREEMPT_RT can be selected by the preempt= command-line parameter. PREEMPT_DYNAMIC allows distributors to ship a single kernel while letting users pick the preemption mode that works best for their workload. So if you specificity need a real-time kernel this won't give it to you. [1] https://lwn.net/Articles/944686/ -- Tixy
Re: No 6.5.10-4 realtime kernel?
Thank you, Gilles. I'll install it and see if it works for me. I'm curious what the rtcqs script will tell me about it after I install it. Scott Denlinger On Mon, Nov 13, 2023, 9:31 PM Gilles Mocellin < gilles.mocel...@nuagelibre.org> wrote: > Le dimanche 12 novembre 2023, 16:08:06 CET Scott Denlinger a écrit : > > Sorry, in Debian world I'm looking for 'linux-image-6.5.0-4-rt-[. . .]' > but > > it would be 6.5.10. > > > > Scott Denlinger > > > > On Sun, Nov 12, 2023 at 10:04 AM Scott Denlinger > > > > wrote: > > > Does anyone know why there are no stock realtime kernels in > trixie/sid? I > > > currently have 'linux-image-6.5.0-1-rt-amd64-unsigned' installed, but I > > > don't see any newer RT kernels available. > > > > > > Scott Denlinger > > Hello, I also was looking for it, but I've seen that the standard kernel > seems > to have some preemptive patch (dynamic ?) : > > So I think the kernel packagers think it's sufficient ? > > ❯ uname -a > Linux guitare 6.5.0-4-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.5.10-1 > (2023-11-03) x86_64 GNU/Linux > > > > >
Re: No 6.5.10-4 realtime kernel?
Le dimanche 12 novembre 2023, 16:08:06 CET Scott Denlinger a écrit : > Sorry, in Debian world I'm looking for 'linux-image-6.5.0-4-rt-[. . .]' but > it would be 6.5.10. > > Scott Denlinger > > On Sun, Nov 12, 2023 at 10:04â¯AM Scott Denlinger > > wrote: > > Does anyone know why there are no stock realtime kernels in trixie/sid? I > > currently have 'linux-image-6.5.0-1-rt-amd64-unsigned' installed, but I > > don't see any newer RT kernels available. > > > > Scott Denlinger Hello, I also was looking for it, but I've seen that the standard kernel seems to have some preemptive patch (dynamic ?) : So I think the kernel packagers think it's sufficient ? ❯ uname -a Linux guitare 6.5.0-4-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.5.10-1 (2023-11-03) x86_64 GNU/Linux
Re: No 6.5.10-4 realtime kernel?
Sorry, in Debian world I'm looking for 'linux-image-6.5.0-4-rt-[. . .]' but it would be 6.5.10. Scott Denlinger On Sun, Nov 12, 2023 at 10:04 AM Scott Denlinger wrote: > Does anyone know why there are no stock realtime kernels in trixie/sid? I > currently have 'linux-image-6.5.0-1-rt-amd64-unsigned' installed, but I > don't see any newer RT kernels available. > > Scott Denlinger >
No 6.5.10-4 realtime kernel?
Does anyone know why there are no stock realtime kernels in trixie/sid? I currently have 'linux-image-6.5.0-1-rt-amd64-unsigned' installed, but I don't see any newer RT kernels available. Scott Denlinger
