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From: peterc@gelato.unsw.edu.au
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH 9/9] ia64: VIRT_CPU_ACCOUNTING (accurate cpu time accounting)
Date: Wed, 17 Oct 2007 04:36:27 +0000	[thread overview]
Message-ID: <87d4vexsqc.wl%peter@chubb.wattle.id.au> (raw)
In-Reply-To: <4714BF9C.6090308@jp.fujitsu.com>

>>>>> "Peter" = Peter Chubb <peterc@gelato.unsw.edu.au> writes:

>>>>> "Hidetoshi" = Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> 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



  parent reply	other threads:[~2007-10-17  4:36 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-16 13:41 [PATCH 9/9] ia64: VIRT_CPU_ACCOUNTING (accurate cpu time accounting) Hidetoshi Seto
2007-10-17  3:35 ` Peter Chubb
2007-10-17  4:36 ` peterc [this message]
2007-10-17  8:16 ` Hidetoshi Seto

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