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Linux 6.3 printk Changes Prepare For Threaded/Atomic Consoles

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  • Linux 6.3 printk Changes Prepare For Threaded/Atomic Consoles

    Phoronix: Linux 6.3 printk Changes Prepare For Threaded/Atomic Consoles

    Sent out today for the Linux 6.3 kernel merge window are the updates to the printk code. Notable this time around are preparations to printk in working toward threaded/atomic consoles support. That threaded/atomic consoles support is all the more important as it's the last piece of the puzzle before the remainder of the real-time (PREEMPT_RT) patches can be upstreamed into the Linux kernel...

    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite

  • #2
    Printing strings on the console is absolutely hot tech in 2023 !

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    • #3
      In anticipation of PREEMPT_RT finally being there, let's start thinking about the next step.

      The next step will be to convince distributions (especially Debian due to its influence) to enable it in their standard kernels. It enables audio latency low enough for videoconference and for pro audio work, which makes Linux that much more useful.

      The overhead in throughput-oriented workloads is negligible, and those building servers are the ones that in theory know what they're doing and can manually install a kernel that's optimized for their workloads.

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      • #4
        Originally posted by ayumu View Post
        The next step will be to convince distributions (especially Debian due to its influence) to enable it in their standard kernels. It enables audio latency low enough for videoconference and for pro audio work, which makes Linux that much more useful.
        Are you kidding? I've used the RT patchset for years and the performance penalty is far from being negligible. Distributions will provide an RT flavour of their kernel.
        ## VGA ##
        AMD: X1950XTX, HD3870, HD5870
        Intel: GMA45, HD3000 (Core i5 2500K)

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        • #5
          It's a amazing how many years we had the linux-rt patch series maintained outside the main tree. Hats off to everyone that worked to persistently to get all the components merged.

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          • #6
            Originally posted by ayumu View Post
            In anticipation of PREEMPT_RT finally being there, let's start thinking about the next step.

            The next step will be to convince distributions (especially Debian due to its influence) to enable it in their standard kernels. It enables audio latency low enough for videoconference and for pro audio work, which makes Linux that much more useful.
            Distributions don't need convincing. Red Hat, SUSE and recently Canonical have RT variants of the kernel for their customers. The reason that no general purpose distribution is going to enable RT in their default kernel is the wrong tradeoff between latency and throughput. Parts of the original patch set that is generally useful has been merged upstream already is enabled by default.

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            • #7
              Originally posted by bobbie424242 View Post
              Printing strings on the console is absolutely hot tech in 2023 !
              and so much faster if you do not do it in a multi server micro kernel ;-)

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              • #8
                Originally posted by bobbie424242 View Post
                Printing strings on the console is absolutely hot tech in 2023 !
                Unironically, yes.

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                • #9
                  Look at how many times we've been told RT is coming! How about we don't hear about it again until it has really happened. It's always missing just a little bit more and never gets mainlined.

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                  • #10
                    Originally posted by sinepgib View Post

                    Unironically, yes.
                    Maybe vconsole scrolling will make a comeback by 2030 then!
                    Other than that, OOM killers is the next frontier in hot Linux tech as people fill their RAM will random Electron and Flatpak apps to enjoy watching the kernel kill processes sanely.
                    Last edited by bobbie424242; 21 February 2023, 06:00 PM.

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