Date: Tue, 19 Feb 2013 09:00:49 +0000 From: Steve O'Hara-Smith <steve@sohara.org> To: Brett Wynkoop <wynkoop@wynn.com> Cc: freebsd-arm@freebsd.org Subject: Re: Network Notes Message-ID: <20130219090049.40cb855b2b7c855971f04a4a@sohara.org> In-Reply-To: <20130219034649.5fb69bce@ivory.wynn.com> References: <20130219034649.5fb69bce@ivory.wynn.com>
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On Tue, 19 Feb 2013 03:46:49 -0500 Brett Wynkoop <wynkoop@wynn.com> wrote: > Greeting- > > Just discovered a difference in network performance between the Pi and > the Bone. > > wynkoop@beaglebone:~ % ping prd7 > PING prd7.wynn.com (199.89.147.7): 56 data bytes > 64 bytes from 199.89.147.7: icmp_seq=0 ttl=64 time=2.170 ms > 64 bytes from 199.89.147.7: icmp_seq=1 ttl=64 time=1.131 ms > 64 bytes from 199.89.147.7: icmp_seq=2 ttl=64 time=0.977 ms > 64 bytes from 199.89.147.7: icmp_seq=3 ttl=64 time=1.052 ms > 64 bytes from 199.89.147.7: icmp_seq=4 ttl=64 time=1.217 ms > ^C > --- prd7.wynn.com ping statistics --- > 5 packets transmitted, 5 packets received, 0.0% packet loss > round-trip min/avg/max/stddev = 0.977/1.309/2.170/0.438 ms > wynkoop@beaglebone:~ % > root@fbsd-pi:~ # ping prd7 > PING prd7.wynn.com (199.89.147.7): 56 data bytes > 64 bytes from 199.89.147.7: icmp_seq=0 ttl=64 time=8.560 ms > 64 bytes from 199.89.147.7: icmp_seq=1 ttl=64 time=10.222 ms This is an artefact of the FreeBSD drivers for the pi - Linux on the pi gets sub millisecond ping times on my network while FreeBSD gets the same 10ms you've been seeing. I've been assuming that it has to do with not using DMA yet. -- Steve O'Hara-Smith <steve@sohara.org>
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