Messages in this thread | | | Date | Sat, 31 May 2003 01:58:29 -0700 (PDT) | Subject | Re: Algoritmic Complexity Attacks and 2.4.20 the dcache code | From | "David S. Miller" <> |
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From: Willy Tarreau <willy@w.ods.org> Date: Sat, 31 May 2003 10:56:12 +0200
Considering that the Alpha and the UltraSparc can issue up to 4 instruction per cycle,
Ultrasparc only has 2 integer units. So it really can only do 2 integer operations per cycle. GCC is giving it an optimal schedule for -mtune=ultrasparc, I know because I wrote that instruction scheduler :-)
You can get 4 issue if you're doing floating point stuff.
I believe the current generation Alpha has 3 integer units. GCC should be doing a good job there too. - 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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