Date: Wed, 9 Feb 2011 20:53:56 -0800 From: David Somayajulu <david.somayajulu@qlogic.com> To: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Increasing TCP Window Size in FreeBSD. Message-ID: <75E1A2A7D185F841A975979B0906BBA6774DD4DE73@AVEXMB1.qlogic.org>
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I have been using iperf in server mode to do some performance analysis. I was trying to increase the Receive TCP Window Size via sysctl net.inet.tcp.recvspace=3D<value> I noticed that I could increase it atmost to 128Kbytes (131072). Any value = above 128k, results in a failure to get the requested window size, resultin= g in a failure of "iperf -s -w <windowsize>". How can I increase it beyond 128Kbytes ? Here are some relevant sysctl values I have been using: net.inet.tcp.rfc1323: 1 net.inet.tcp.recvspace: 131072 net.inet.tcp.recvbuf_max: 4096000 net.inet.tcp.recvbuf_inc: 65536 net.inet.tcp.recvbuf_auto: 1 Thanks david S. ________________________________ This message and any attached documents contain information from QLogic Cor= poration or its wholly-owned subsidiaries that may be confidential. If you = are not the intended recipient, you may not read, copy, distribute, or use = this information. If you have received this transmission in error, please n= otify the sender immediately by reply e-mail and then delete this message.
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