Date: Fri, 31 May 2002 22:02:21 +0000 From: "Glenn Gombert" <freebsd@fastmail.fm> To: "Bosko Milekic" <bmilekic@unixdaemons.com> Cc: "David W. Chapman Jr." <dwcjr@inethouston.net>, "Nicolas Souchu" <nsouch@free.fr>, "Current" <freebsd-current@FreeBSD.ORG> Subject: Re: -current as guest of VMWare2 Message-ID: <20020531220221.DA6366D9BB@www.fastmail.fm>
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Here is the patch from a previous posting that fixes the problem of
running FreeBSD -Current as a Guest OS under VMWare Workstation 3.0:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Someone mentioned on a list somewhere that vmware takes forever to
emulate the cmpxchg instruction, and that using the I386_CPU version
of atomic_cmpset_int() helps a lot. I noticed a major vmware slowdown
with -current sometime in September, so I tried avoiding the
cmpxchg's and things got much faster. Below is the patch I use
(using this outside vmware on SMP hardware is a bad idea :-).
Ian
Index: atomic.h
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/i386/include/atomic.h,v
retrieving revision 1.21
diff -u -r1.21 atomic.h
--- atomic.h 2001/10/08 20:58:24 1.21
+++ atomic.h 2001/10/09 18:35:25
@@ -111,7 +111,7 @@
* Returns 0 on failure, non-zero on success
*/
-#if defined(I386_CPU)
+#if defined(I386_CPU) || 1
static __inline int
atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
{
Glenn G.
--
Glenn Gombert
freebsd@fastmail.fm
"Never trust any operating system you don't have the source code for"
--
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