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Update the PREEMPT config bit for PREEMPT_DYNAMIC

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Most distros have switched to that by now.
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Robbert van der Helm
2023-02-20 11:31:00 +01:00
parent cfca235e66
commit 3ef515fdc8
1 changed files with 8 additions and 1 deletions
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README.md
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@@ -693,9 +693,16 @@ negative side effects:
- First of all, you'll want to make sure that you can run programs with realtime - First of all, you'll want to make sure that you can run programs with realtime
scheduling. Note that on Arch and Manjaro this does not necessarily require a scheduling. Note that on Arch and Manjaro this does not necessarily require a
realtime kernel as they include the `PREEMPT` patch set in their regular realtime kernel as they include the `PREEMPT` patch set in their regular
kernels. You can verify that this is working correctly by running `chrt -f 10 whoami`, which should print your username, and running `uname -a` should print kernels. You can verify that this is working correctly by running `chrt -f 10 whoami`,
which should print your username, and running `uname -a` should print
something that contains `PREEMPT` in the output. something that contains `PREEMPT` in the output.
If the `uname -a` output contains `PREEMPT_DYNAMIC`, then run either
`zgrep PREEMPT /proc/config.gz` or `grep PREEMPT "/boot/config-$(uname -r)"`
depending on your distro. If `CONFIG_PREEMPT` is not set, then either add the
`preempt=full` kernel parameter or better yet, switch to a kernel that's
optimized for low latencies.
- You can also try enabling the `threadirqs` kernel parameter and using which - You can also try enabling the `threadirqs` kernel parameter and using which
can in some situations help with xruns. After enabling this, you can use can in some situations help with xruns. After enabling this, you can use
[rtirq](https://github.com/rncbc/rtirq#rtirq) to increase the priority of [rtirq](https://github.com/rncbc/rtirq#rtirq) to increase the priority of