Messages in this thread | | | Subject | Re: [ANNOUCE] interrupt latency measurement tool | Date | Tue, 21 Mar 2000 16:26:45 +1100 (EST) | From | (Graham Stoney) |
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Hi Jun,
Jun Sun writes: > Your feedbacks and contributions are always welcome.
Thanks for providing these results, they're very interesting.
A couple of questions though. Firstly, the very high latency due to printk on the PowerPC system makes me wonder whether the kernels you're using include the fix to n_tty.c described in: http://lists.linuxppc.org/listarcs/linuxppc-embedded/199912/msg00006.html
I'd also be interested to hear how the results change when Ingo Molnar's lowlatency patch is applied, at: http://people.redhat.com/mingo/lowlatency-patches/
And of course, it would be very interesting to see how much the results change when running RTLinux on the PowerPC, if you have a benchmark which would run in both environments.
Regards, Graham -- Graham Stoney Principal Hardware/Software Engineer Canon Information Systems Research Australia Ph: +61 2 9805 2909 Fax: +61 2 9805 2929
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