On Wed, Oct 21, 2015 at 07:34:28PM +0800, Wangnan (F) wrote: > >If you want to actually disable the event: pmu->stop() will make it > >stop, and you can restart using pmu->start().xiezuo > > I also prefer totally disabling event because our goal is to reduce > sampling overhead as mush as possible. However, events in perf is > CPU bounded, one event in perf cmdline becomes multiple 'perf_event' > in kernel in multi-core system. Disabling/enabling events on all CPUs > by a BPF program a hard task due to racing, NMI, ...
But eBPF perf events must already be local afaik. Look at the constraints perf_event_read_local() places on the events. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
