Re: [patch] [sched] avoid %fs/%gs reloading on x86.

From: Ingo Molnar (mingo@elte.hu)
Date: Sun Jan 27 2002 - 14:29:10 EST


On Sun, 27 Jan 2002, Ingo Molnar wrote:

> [...] On P6 class CPUs it takes 36 cycles to reload %fs and %gs, [...]

correction: 14 cycles.

> when applied to 2.5.3-pre5, the patch achieves a 2.5% improvement in
> 2-task lat_ctx context-switch performance.

(the 2.5% improvement is correct.)

        Ingo

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