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Message-ID: <46F7D9C8.7020101@candelatech.com> Date: Mon, 24 Sep 2007 08:37:44 -0700 From: Ben Greear <greearb@...delatech.com> To: Steve Wise <swise@...ngridcomputing.com> CC: hadi@...erus.ca, Evgeniy Polyakov <johnpol@....mipt.ru>, netdev@...r.kernel.org, Robert Olsson <Robert.Olsson@...a.slu.se> Subject: Re: pktgen question Steve Wise wrote: > > Ben Greear wrote: >> Steve Wise wrote: >>> I think pktgen should be cloning the skbs using skb_clone(). Then >>> it will work for all devices, eh? >> That might work, but it would decrease performance slightly (or, >> increase CPU load at least). > > Perf-wise, you could clone the skbs up front, then deliver them to the > nic in a tight loop. This would mitigate the added overhead > introduced by calling skb_clone() in the loop doing transmits... That only works if you are sending a small number of skbs. You can't pre-clone several minutes worth of 10Gbe traffic with any normal amount of RAM. >> >> Maybe a new option: multi_clone >> > > If the current code is busted, I think it should be fixed. Well, it works fine when used correctly :) Ben -- Ben Greear <greearb@...delatech.com> Candela Technologies Inc http://www.candelatech.com - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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