Date: Thu, 7 Mar 2002 10:10:42 -0500 (EST) From: Kenneth Culver <culverk@alpha.yumyumyum.org> To: Russo Roberto <atm_roberto@yahoo.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: (FreeBSD TCP) vs (Linux TCP) Message-ID: <20020307101006.P17488-100000@alpha.yumyumyum.org> In-Reply-To: <20020307104947.11294.qmail@web13006.mail.yahoo.com>
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Use a newer version of FreeBSD, like 4.5. It has a lot of fixes and enhancements that might change the tests you're doing. Ken On Thu, 7 Mar 2002, Russo Roberto wrote: > Hi, > > I am working to evaluate performance of > throughput between two PC connected between > a Fore-ATM card adapter to a network: > the netwotk is composed of a PVC of 4Mbps between > three routers and I am just looking to use > differente queuing discipline like FIFO-PQ-WFQ. > > I have configured the two PC with the same Operating > Systems: a Linux (Red-Hat) and a FreeBSD v4.3 (Kame > Patch) and I am using NETPERF to make throughput > test. > > Making the first tests I note a difference beetwen > using the two FreeBSD or the two LINUX: > > [1] > for example when using FreeBSD-FIFO and make > a default TCP_STREAM Netperf with the deafult > values of SendSocketSize and ReceiverSocketSize > (16.000) the value of througput is lower (<2Mbps) > than the 3.5Mpbs that I have configured in the PVC; > > however making the same test with the values of > SendSocketSize and ReceiverSocketSize of 128000 > the test is good and I have the value of 3.45Mbps > > using Linux-FIFO and make a default TCP_STREAM > with the deafult values of SendSocketSize > and ReceiverSocketSize (16.000) the value of > througput is of 3.5Mpbs. > > [2] > using other queuing discipline I have always > to change in FreeBSD the values of > SendSocketSize and ReceiverSocketSize to have > values that seems the real condition of the > network; using Linux the values is always correct > without changing the values of the Sockets. > > > - anybody can help me to resolve this problem ? > Is the TCP/IP stacks of the two systems very > differents ? What is different ? > Why the Linux seems have the best performances ? > > - Where I can find some documents that describe > the TCP stacks of the two systems ? > > really Thanks...!!!!! > > Roberto > > > > > > __________________________________________________ > Do You Yahoo!? > Try FREE Yahoo! Mail - the world's greatest free email! > http://mail.yahoo.com/ > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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