Messages in this thread | | | From | Oscar Shiang <> | Subject | Re: [patch v11 00/13] extensible prctl task isolation interface and vmstat sync | Date | Sat, 19 Feb 2022 16:02:10 +0800 |
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Hi Marcelo,
I tried to apply your patches to kernel v5.15.18-rt28 and measured the latencies through oslat [1].
It turns out that the peak latency (around 100us) can drop to about 90us. The result is impressive since I only changed the guest's kernel instead of installing the patched kernel to both host and guest.
However, I am still curious about: 1) Why did I catch a bigger maximum latency in almost each of the results of applying task isolation patches? Or does it come from other reasons? 2) Why did we only get a 10us improvement on quiescing vmstat?
[1]: The result and the test scripts I used can be found at https://gist.github.com/OscarShiang/8b530a00f472fd1c39f5979ee601516d#testing-task-isolation-via-oslat
Thanks, Oscar
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