Date: Thu, 18 Nov 2004 18:23:48 -0800 (PST) From: Arne "Wörner" <arne_woerner@yahoo.com> To: freebsd-performance@freebsd.org Subject: Re: I've ran out of ideas Message-ID: <20041119022348.91477.qmail@web41208.mail.yahoo.com>
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Ooopps... My last email has somehow the wrong content... Sorry. --- Aaron Glenn <aaron.glenn@gmail.com> wrote: > On Thu, 18 Nov 2004 10:31:55 -0800 (PST), Arne Wörner > <arne_woerner@yahoo.com> wrote: > > Hmm... So the hard disc driver delivers data quite quickly... > > > > Maybe you could try a read from /dev/zero via ftp (by logging in as a user > > via ftp)? Then we would see, how fast your network driver + card is (e. g. > > if you use "wget" there is a speed meter on the right)... > > ftp> get /dev/zero [...] > 73784040 bytes received in 00:11 (5.86 MB/s) > Hmm... Since /dev/zero delivers on my box about 100-300MByte/sec (100Mbyte/sec for 512byte block size), it looks like your network driver hinders the throughputting proceedings (I assume, that your other network devices can handle 90Mbit/sec; no ethernet collisions, no concurrency, ...). Are you sure, that Linux performs better in the same setting? Furthermore I saw on my box, that indeed a block size of 2KByte slows "dd..." down to 10MByte/sec (which is just 25% of the "maximum"). Maybe the handshaking of TCP causes some slow down? Did you try "ping -c 10 -s 60000 <other host>" where <other host> denotes another host? Now I do not have any further ideas, but I am interested in the ping-results... -Arne __________________________________ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com
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