Date: Tue, 4 Jun 2002 14:53:48 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_mutex.c Message-ID: <200206042153.g54LrmT07436@freefall.freebsd.org>
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jhb 2002/06/04 14:53:48 PDT
Modified files:
sys/kern kern_mutex.c
Log:
Optimize the adaptive mutex spin a bit. Use a simple while loop with
simple reads (and on IA32, a "pause" instruction for each interation of the
loop) to spin until either the mutex owner field changes, or the lock owner
stops executing.
Suggested by: tanimura
Tested on: i386
Revision Changes Path
1.100 +4 -1 src/sys/kern/kern_mutex.c
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