Messages in this thread |  | | Date | Thu, 04 Oct 2001 14:25:23 -0700 (PDT) | Subject | Re: Context switch times | From | "David S. Miller" <> |
| |
From: arjan@fenrus.demon.nl Date: Thu, 04 Oct 2001 22:14:13 +0100
> Comments? 2.4.x supports SSE on pentium III/athlons, so the SSE registers need to be saved/restored on a taskswitch as well.... that's not exactly free.
lat_ctx doesn't execute any FPU ops. So at worst this happens once on GLIBC program startup, but then never again.
This assumes I understand how lazy i387 restores work in the kernel :-)
Franks a lot, David S. Miller davem@redhat.com - 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/
|  |