From mboxrd@z Thu Jan 1 00:00:00 1970 From: peterc@gelato.unsw.edu.au Date: Wed, 17 Oct 2007 04:36:27 +0000 Subject: Re: [PATCH 9/9] ia64: VIRT_CPU_ACCOUNTING (accurate cpu time accounting) Message-Id: <87d4vexsqc.wl%peter@chubb.wattle.id.au> List-Id: References: <4714BF9C.6090308@jp.fujitsu.com> In-Reply-To: <4714BF9C.6090308@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> "Peter" = Peter Chubb writes: >>>>> "Hidetoshi" = Hidetoshi Seto writes: >>> [9/9] ia64_acct_get_vtime.patch Peter> trying to do this stuff. Things to watch are: -- With Montvale Peter> and later, the processor clock speed can be varied via ACPI. Peter> Does ITC rate change? I've checked ... according to the latest IA-64 System Architecture, ITC runs at constant rate even if the instruction execution rate changes. So you're safe. -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia