On Thu, Apr 09, 2015 at 12:37:44PM -0400, Kan Liang wrote: > The only way you can get a lot of collision is when you count the same > thing multiple times. But it is not a useful configuration.
Not entirely true; I _think_ you can be unfortunate if you measure with a userspace only PEBS event along with either a kernel or unrestricted PEBS event. Imagine the event triggering and setting the overflow flag right before entering the kernel. Then all kernel side events will end up with multiple bits set. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
