From: Helge Deller <deller@gmx.de>
To: Joel Soete <soete.joel@tiscali.be>
Cc: parisc-linux@parisc-linux.org
Subject: Re: [parisc-linux] sched_clock implementation
Date: Sun, 21 Sep 2003 13:20:36 +0200 [thread overview]
Message-ID: <200309211320.36485.deller@gmx.de> (raw)
In-Reply-To: <20030921000447.GC31268@dsl2.external.hp.com>
On Sunday 21 September 2003 02:04, Grant Grundler wrote:
> On Sat, Sep 20, 2003 at 06:02:10PM +0000, Joel Soete wrote:
> > a quick look into paxx.pdf which about CR16 speak of "peak instruction
> > rate" but do not define anywhere?
> > I presume that is the cpu clock but would like somebody confirm.
>
> Read about "Interval Timer" (cr16) in the PA 2.0 Arch book.
> PDC provides the exact rate that CR16 is changing.
> Looks like PDC_TOD_ITIMER is the call but I'm not sure offhand.
> In any case, I've only seen it used as CPU cycle counter.
> (ie 1:1 with CPU clock).
Hi Joel,
I think we have the rate in the variable "boot_cpu_data.cpu_hz" (see
arch/parisc/kernel/processor.c) already.
Helge
next prev parent reply other threads:[~2003-09-21 11:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-18 20:35 [parisc-linux] sched_clock implementation Matthew Wilcox
2003-09-19 15:32 ` Joel Soete
2003-09-19 16:00 ` Carlos O'Donell
2003-09-19 16:11 ` Joel Soete
2003-09-20 18:02 ` Joel Soete
2003-09-21 0:04 ` Grant Grundler
2003-09-21 11:20 ` Helge Deller [this message]
2003-09-21 14:24 ` Carlos O'Donell
2003-10-05 15:43 ` Joel Soete
2003-10-06 14:20 ` Carlos O'Donell
[not found] ` <3F5CB6FB0000DCF3@ocpmta1.freegates.net>
2003-10-06 17:31 ` Carlos O'Donell
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