Date: Fri, 10 Jul 2009 08:45:33 +0300 From: Andriy Gapon <avg@freebsd.org> To: David Schultz <das@freebsd.org>, freebsd-current@freebsd.org Subject: Re: dtrace users opinion solicited (timestamps) Message-ID: <4A56D57D.1090508@freebsd.org> In-Reply-To: <20090709193932.GA54408@zim.MIT.EDU> References: <4A562960.3010801@freebsd.org> <20090709193932.GA54408@zim.MIT.EDU>
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on 09/07/2009 22:39 David Schultz said the following: > Doesn't Solaris DTRT and compensate for TSC frequency changes? > Why can't we do the same thing? That very well may be. I haven't thoroughly checked but I think that even we are doing the right thing when we use TSC as a timecounter. But at this moment I am looking for a quick/simple and "sufficiently good" fix for the bigger problems with DTrace timestamping (kern/127441). Another side of the "simplicity" is that the timestamp function for DTrace needs to be fast and should not itself be probed. -- Andriy Gapon
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