Date: Tue, 16 Oct 2001 09:27:07 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Luigi Rizzo <rizzo@aciri.org> Cc: arch@freebsd.org Subject: RE: where to put support for timestamping kernel events ? Message-ID: <XFMail.011016092707.jhb@FreeBSD.org> In-Reply-To: <20011014201400.A49458@iguana.aciri.org>
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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 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. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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