Re: [patch 05/24] perfmon: X86 generic code (x86)
From: Andi Kleen
Date: Thu Nov 27 2008 - 08:39:20 EST
> What about a thread doing this and another one in the middle of read the buffer?
I assume that uses locks. Locking between threads is easy.
>
> Or what about a thread trying to reset the buffer while you're processing an PMU
> interrupt on another CPU. I know each buffer is per-CPU, but that does not
> prevent two threads for trying to operate on it at the same time from
> different CPUs.
That happens per CPU.
-Andi
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