[LAU] 1. Linux-Rt and TSC - 2. Linux-Rt and IRQ allocation

[Clemens Ladisch]

Ralf Mardorf wrote:
> All Rt kernels for all Linux distros I use seem to have an issue
> regarding to TSC.
>
> kernel: tsc: Marking TSC unstable due to TSCs unsynchronized

This is a property of your CPU (whatever it is).

When multiple cores do not have exactly the same TSC time, it is not
possible to use this for timing in code that might be migrated to
another core.

> 2. Linux-Rt and IRQ allocation
> ==============================
>
> All kernels I used in the last years for *buntu, Debian and Arch Linux
> <= 3.8.13-rt14 (kernels > 3.8.13-rt14 don't work on my machine) give my
> graphics it's own IRQ, the Debian kernel 3.2.0-4-rt-686-pae doesn't.

What is difference in /proc/interrupts?


Regards,
Clemens