Date: Thu, 14 Feb 2008 20:54:09 +0800 From: =?gb2312?B?wfXV5g==?= <glayfoofighter@hotmail.com> To: <freebsd-questions@freebsd.org> Subject: SACK retransmit single packet although ack announces multiple gaps Message-ID: <BAY139-W381A12469D9E56CD6E0EFBD9250@phx.gbl>
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HI; thanks in advance! I am doing my test with SACK on FreeBSD 7. When the sender receives ACKs with sack information, even if there are multiple gaps in the sack information, after 3 duplicate ACKs, the sender only retransmit 1 packet during that RTT. there are something may need to be set properly : net.inet.sack.maxholes(default value :128) net.inet.sack.globalholes(0) net.inet.sack.globalmaxholes(65536) but i found no instructions on how to set them, so i just keep their default values. is the performance related to these parameters, how can i set them... ? if not, who knows what would be the problem... thanks! yhen _________________________________________________________________ 天凉了，添衣了，心动了，“七件”了 http://get.live.cn
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