Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!cs.utexas.edu!rice!sun-spots-request
From: larch!anh@relay.eu.net (Andrew Harker)
Newsgroups: comp.sys.sun
Subject: Reading Sun 3 timer register within Kernel device driver
Keywords: Miscellaneous
Message-ID: <3295@brazos.Rice.edu>
Date: 17 Nov 89 14:36:09 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 8
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 8, Issue 207, message 12 of 16

I have a problem relating to SUN OS3.5 kernel device drivers. I want to
measure the performance of the driver by calling a routine at certain
points in the driver which records a timer value in a buffer somewhere.
Outside the kernel, the obvious answer is to use gettimeofday(), but this
is no good inside the device driver.

Is there a way of accessing the SUN's timer register from within the
kernel? Is there an easier way?