Messages in this thread | | | Date | Tue, 09 May 2006 23:39:58 -0700 (PDT) | Subject | Re: [RFC/PATCH] Make powerpc64 use __thread for per-cpu variables | From | "David S. Miller" <> |
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From: Paul Mackerras <paulus@samba.org> Date: Wed, 10 May 2006 16:29:59 +1000
> I have moved current, smp_processor_id and a couple of other things to > per-cpu variables, and that results in the kernel text being about 8k > smaller than without any of these __thread patches. Performance seems > to be very slightly better but it's hard to be sure that the change is > statistically significant, from the measurements I've done so far.
That first cache line of current_thread_info() should be so hot that it's probably just fine to use current_thread_info()->task since you're just doing a mask on a fixed register (r1) to implement that. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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