On Mon, 3 Jul 2006, David Xu wrote:
I found 5% performance decrease on dual P4, maybe P4 is quite bad when doing atomic operation. ;-) Thanks,
When I've measured, generally, yes, P4 performance has been abysmal for synchronization operations, both atomic operations and CPU-local interrupt disabling, etc.
I suspect rwlocks could use a bit of optimization in the contention case. I've not dug into the code, so I'm not clear how they compare with respect to adaptive behavior.
Robert N M Watson Computer Laboratory University of Cambridge _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
