Messages in this thread |  | | Date | Fri, 5 Oct 2001 19:57:49 -0700 (PDT) | From | Davide Libenzi <> | Subject | Re: Context switch times |
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On Fri, 5 Oct 2001, Albert D. Cahalan wrote:
> If cache problems are bad enough, maybe this pays for itself: > > /* old */ > current = stack_ptr & ~0x1fff; > > /* new */ > hash = (stack_ptr>>8)^(stack_ptr>>12)^(stack_ptr>>16)^(stack_ptr>>20); > current = (stack_ptr & ~0x1fff) | (hash & 0x1e0);
I suggested something like this ( randomly "moved" struct task_struct * ) a couple of years ago. Never tried to measure the impact of the system though.
- Davide
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