On 01-Dec-00 John Baldwin wrote: > jhb 2000/11/30 16:11:00 PST > > Modified files: > sys/sys mutex.h > sys/kern kern_mutex.c > Log: > Split the WITNESS and MUTEX_DEBUG options apart so that WITNESS does not > depend on MUTEX_DEBUG. The MUTEX_DEBUG option turns on extra assertions > and checks to verify that mutexes themselves are implemented properly. > The WITNESS option uses extra checks and diagnostics to verify that other > code is using mutexes properly. Removing MUTEX_DEBUG and only using WITNESS provided a very noticable performance increase on the quad xeon I have here for testing for I/O bound operations. Before, trying to do a cvs update would end up with cvs having 7s of user time nad 9000s of system time, now it is back down to more sane boundaries. -- John Baldwin <[EMAIL PROTECTED]> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
