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Date: Thu, 16 Dec 2010 15:13:41 +0100 From: Eric Dumazet <eric.dumazet@...il.com> To: Jesper Dangaard Brouer <hawk@...x.dk> Cc: Arnaldo Carvalho de Melo <acme@...radead.org>, Steven Rostedt <srostedt@...hat.com>, Alexander Duyck <alexander.h.duyck@...el.com>, Stephen Hemminger <shemminger@...tta.com>, netfilter-devel <netfilter-devel@...r.kernel.org>, netdev <netdev@...r.kernel.org>, Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com> Subject: Re: Possible regression: Packet drops during iptables calls Le jeudi 16 décembre 2010 à 15:04 +0100, Jesper Dangaard Brouer a écrit : > Now I just need to calculate, how large a NIC buffer I need to buffer > 3.125 ms at 1Gbit/s. > > 3.125 ms * 1Gbit/s = 390625 bytes > > Can this be correct? > > How much buffer does each queue have in the 82576 NIC? > (Hope Alexander Duyck can answer this one?) > Worst case is if you receive very small frames, because 3.125 ms is about 5000 frames at 1Gbit/s -- 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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