Date: Mon, 27 Apr 1998 11:43:01 -0500 From: Jonathan Lemon <jlemon@americantv.com> To: dr@chaski.com Cc: questions@FreeBSD.ORG Subject: Re: Tracing TCP/IP application response time Message-ID: <19980427114301.62886@right.PCS> In-Reply-To: <354494EF.86F83E92@chaski.com>; from Dan Ratcliff on Apr 04, 1998 at 09:23:43AM -0500 References: <354494EF.86F83E92@chaski.com>
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On Apr 04, 1998 at 09:23:43AM -0500, Dan Ratcliff wrote: > Hi, > > I want to trace the response time of a TCP/IP application. > My measurements must be of a resolution that is less > than a second--milliseconds would be nice. > > Is there any utility to do this? Can anyone recommend a > no-cost sniffer application? tcpdump. This utility will dump the network traffic for your application, and timestamp each packet to the accuracy of the kernel's clock. `man tcpdump' should get you started. You will also need to build a kernel with bpf support; eg: put the following lines in your kernel configuration: pseudo-device bpfilter 4 -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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