Messages in this thread |  | | From | Robert Olsson <> | Date | Thu, 14 Sep 2000 17:50:51 +0200 (CEST) |
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Yes !
The FF experiments with 2.1.X indicated improvement factor about 2-3 times with skb recycling. With combination of FF and skb recycling we could reach fast Ethernet wire speed forwarding on 400 Mhz CPU. About ~147 KPPS. As jamal reported the improvement is much less today but the forwarding performance is impressive even without FF and skb recycling. Slab seems to do a good job and especially when the debug is disabled. :-)
--ro
Andi Kleen writes: > On Thu, Sep 14, 2000 at 11:59:32PM +1100, Andrew Morton wrote: > > That's 20 usec per interrupt, of which 1 usec could be saved by skb > > pooling. > > FF usually runs with interrupt mitigation at higher rates (8-16 or even > more packets / interrupt). I agree though that it probably does not > make too much difference. alloc_skb could probably be made cheaper > for the FF case by being more clever in the slab constructor (I think > there was some bitrot during 2.3 on the cache line usage -- 2.2 pretty > much only needed 2 cache lines in the header for a FF packet) > > > -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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