sun bug 1008635: hardware? software? fixed?

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Article #12783

#12783

From: forsyth
Date: Thu, 11 May 1989 09:44

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The Sun Technical Bulletin (Dec. 1988) includes the following report:

	Reference Number: 1008635
	Release: 3.2, 3.4, 3.5
	Synopsis: possible cache problem on 3/280

	Description:
	        Possible cache problems on 3/200 machines seem to cause
	        abnormal behaviour when the system is required to `page'
	        heavily.  The presence of an `ie1' card also seems to
	        contribute significantly to the occurance [sic] of failure.

Has the trouble been traced?  Was it hardware or software?  Has it been
fixed?  What was the ``abnormal behaviour''?  One application that pages
energetically sees a block of 16 bytes on a 0 mod 16 boundary cleared to
zero.  It is unpredictable by time, and location in the data space.  The
machine has an ie1 (all our 3/280s have an ie1).   16 bytes on a 16 byte
boundary sounds remarkably like a cache line to me.  Could the trouble be
a missing vac_*flush?  The program does not fail on a 3/50.

Technical Details

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: forsyth@minster.york.ac.uk
Newsgroups: comp.sys.sun
Subject: sun bug 1008635:  hardware? software?  fixed?
Keywords: SunOS
Message-ID: <swordfish.610223134@minster.york.ac.uk>
Date: 11 May 89 09:44:26 GMT
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Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
Original-Date: 3 May 1989 18:25:32 GMT
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