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Message-ID: <20090722102520.27a024ed@nehalam> Date: Wed, 22 Jul 2009 10:25:20 -0700 From: Stephen Hemminger <shemminger@...tta.com> To: Ben Hutchings <bhutchings@...arflare.com> Cc: Jesper Dangaard Brouer <hawk@...u.dk>, jon_zhou@...lent.com, netdev@...r.kernel.org Subject: Re: the maximal speed of pktgen with 1Gbps NIC On Wed, 22 Jul 2009 17:12:32 +0200 Ben Hutchings <bhutchings@...arflare.com> wrote: > On Wed, 2009-07-22 at 14:56 +0200, Jesper Dangaard Brouer wrote: > > On Wed, 22 Jul 2009, jon_zhou@...lent.com wrote: > > > > > anyone knows the maximal speed of pktgen with 1Gbps NIC? > > > > You are limited by the number of packets per second (pps) your machine can > > generate. This limitation is given by the CPU speed and the NIC used. > > > > The maximum pps I have seen with pktgen at 1Gbit/s is 1200 kpps. > > > > 1Gbit/s wire speed pps with 64 bytes packets is approx 1953 kpps. > > (1000*10^6/(64*8) = 1953125) > [...] > > You need to take the inter-packet gap into consideration too. > > Ben. Speed Packets/sec TCP MByte/sec 10 M 14880.95 1,170,351 100 M 148809.52 11,703,511 1 G 1488095.24 123,755,256 10 G 14880952.38 1,237,552,556 40 G 59523809.52 4,950,210,224 100 G 148809523.81 12,375,525,559 * TCP assumes timestamp option and jumbo frames if possible. http://www.erg.abdn.ac.uk/users/gorry/course/lan-pages/enet-calc.html -- -- 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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