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=<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, resulting 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 Corporation 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 notify the sender immediately by reply e-mail and then delete this message.help
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