Date: Tue, 9 Sep 2008 17:55:56 +0400 From: Stanislav Sedov <stas@FreeBSD.org> To: "Jacques Fourie" <jacques.fourie@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: Routing benchmarks Message-ID: <20080909175556.07bac5f0.stas@FreeBSD.org> In-Reply-To: <be2f52430809090633o7b80f23y2749a055f61d5cb0@mail.gmail.com> References: <be2f52430809090633o7b80f23y2749a055f61d5cb0@mail.gmail.com>
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--Signature=_Tue__9_Sep_2008_17_55_56_+0400_Hd1Nlq5DAZQvs1od Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, 9 Sep 2008 15:33:30 +0200 "Jacques Fourie" <jacques.fourie@gmail.com> mentioned: > Hi, >=20 > I've performed some benchmark tests on my Gumstix Connex 400 (Intel > Xscale PXA 255 CPU clocked at 400MHz) with a netDuo expansion board. > This board has two smc network interfaces. I configure the gumstix as > a router and measure network throughput with netperf running on > seperate boxes on either side of the gumstix. My initial tests showed > a TCP throughput of 2Mbit/s. After adapting the smc driver to use DMA > this figure went up to 7Mbit/s. Although this is a significant > improvement, it still seems to be a bit slow. Does anyone have any > tips on how I can go about to try and figure out where the bottleneck > lies? Initial profiling showed that a significant amount of time was > spent doing memory to memory copies of data, but after the DMA change > profiling does not show any obvious culprits. >=20 Have you tried checking the speed of the interface itself? Without routing involved? May it be the interfaces itself being so slow? --=20 Stanislav Sedov ST4096-RIPE --Signature=_Tue__9_Sep_2008_17_55_56_+0400_Hd1Nlq5DAZQvs1od Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkjGgHIACgkQK/VZk+smlYFaCwCeOOMspWnQD9cgfw4mbnPmcIkW OtAAn0Wtq3vmd7DMHrh4sgSz6A1yU30y =1OcM -----END PGP SIGNATURE----- --Signature=_Tue__9_Sep_2008_17_55_56_+0400_Hd1Nlq5DAZQvs1od--
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