From owner-freebsd-arch Tue Oct 16 10: 8:33 2001 Delivered-To: freebsd-arch@freebsd.org Received: from iguana.aciri.org (iguana.aciri.org [192.150.187.36]) by hub.freebsd.org (Postfix) with ESMTP id 36D9537B40A; Tue, 16 Oct 2001 10:08:31 -0700 (PDT) Received: (from rizzo@localhost) by iguana.aciri.org (8.11.3/8.11.1) id f9GH5KO64574; Tue, 16 Oct 2001 10:05:20 -0700 (PDT) (envelope-from rizzo) Date: Tue, 16 Oct 2001 10:05:20 -0700 From: Luigi Rizzo To: John Baldwin Cc: Luigi Rizzo , arch@FreeBSD.org Subject: Re: where to put support for timestamping kernel events ? Message-ID: <20011016100520.E63982@iguana.aciri.org> References: <20011014201400.A49458@iguana.aciri.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.23i Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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