From: Grant Grundler <grundler@parisc-linux.org>
To: Joel Soete <soete.joel@tiscali.be>
Cc: Carlos O'Donell <carlos@baldric.uwo.ca>,
Matthew Wilcox <willy@debian.org>,
parisc-linux@parisc-linux.org
Subject: Re: [parisc-linux] sched_clock implementation
Date: Sat, 20 Sep 2003 18:04:47 -0600 [thread overview]
Message-ID: <20030921000447.GC31268@dsl2.external.hp.com> (raw)
In-Reply-To: <3F6C9622.60402@tiscali.be>
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).
hth,
grant
next prev parent reply other threads:[~2003-09-21 0:04 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 [this message]
2003-09-21 11:20 ` Helge Deller
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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