Date: Tue, 16 Oct 2001 10:05:20 -0700 From: Luigi Rizzo <rizzo@aciri.org> To: John Baldwin <jhb@FreeBSD.org> Cc: Luigi Rizzo <rizzo@aciri.org>, arch@FreeBSD.org Subject: Re: where to put support for timestamping kernel events ? Message-ID: <20011016100520.E63982@iguana.aciri.org> In-Reply-To: <XFMail.011016092707.jhb@FreeBSD.org> References: <20011014201400.A49458@iguana.aciri.org> <XFMail.011016092707.jhb@FreeBSD.org>
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On Tue, Oct 16, 2001 at 09:27:07AM -0700, John Baldwin wrote: > > On 15-Oct-01 Luigi Rizzo wrote: > > [Apparently this kind of question is better asked on -arch, > > so sorry for the repost, here it goes again... and in the meantime > > i have had some time to elaborate on names and locations.] > > Note that KTR has somewhat similar support for this, though it currently what is KTR ? any pointers ? (sorry but i am not familiar with -current, where this seems to be...) > doesn't use the TSC. It could be changed to use cpu_cyclecount() (which is a > MI interface which uses the TSC when it can) perhaps which might help. > Unfortunately, the KTR buffr isn't exported via sysctl(8) at the moment. well, the sysctl export is really trivial to do. cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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