Message Edited by email@example.com on 07-12-2005 04:30 PM
Message Edited by jdgallag on 07-12-2005 05:47 PM
Message Edited by jdgallag on 07-12-2005 05:50 PM
Message Edited by jdgallag on 07-12-2005 05:51 PM
Hi,VTune is a sampling-based tool and Lockmeter is a instrumentation-based tool. Does this make different when measuring the spin locks in Linux kernel?
Of course it makes a difference. In general, Sampling profiling is much less intrusive, and more accurate, while instrumentation based profiling introduces an overhead, but can provide more context, e.g., spin count.
Regarding timing information, I would trustsampling than any other instrumentation based tool.