Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: mario%research7.computer-science.manchester.ac.uk@nss.cs.ucl.ac.uk (Mario Wolczko)
Newsgroups: comp.sys.sun
Subject: cc -O4 on X11R3 server
Keywords: Windows
Message-ID: <16240.8904051547@r7.cs.man.ac.uk>
Date: 26 Apr 89 04:58:38 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
Original-Date: Wed,5 Apr 16:39:19 1989
X-Sun-Spots-Digest: Volume 7, Issue 251, message 12 of 14

>  I am also going to try recompiling the X server with cc -O4 (instead of
>  the default -O2).  

I have already done this on both Sun3 and Sun4, and the server is somewhat
smaller and a fair bit faster.  It's been in use for a few weeks among a
dozen or so users, and no unusual behaviour has been reported.  (Oh yes, I
applied the purdue 2.0 patches first).

Be warned though: compiling the bitblt modules mfbbitblt and cfbbitblt
requires over 30Mb of stack space!  You need to do a "limit stack 35m"
before it will work.  Also, if you don't have 32Mb of real memory, your
machine will probably thrash.  I tried this on an otherwise idle 8Mb 3/60,
and iropt only got 60mins CPU in a 12 hour period.  This prevented me from
applying -O4 to these modules on a Sun3, as we don't have one that big
running SunOS4.0.

Mario Wolczko

Dept. of Computer Science    Internet:   mario@ux.cs.man.ac.uk
The University               USENET: mcvax!ukc!man.cs.ux!mario
Manchester M13 9PL           JANET:      mario@uk.ac.man.cs.ux
U.K.                         Tel: +44-61-275 6146  (FAX: 6280)