On Thu, Jul 10, 2014 at 07:03:50PM +0100, Steven Rostedt wrote: > On Thu, 10 Jul 2014 17:20:14 +0100 > "Javi Merino" <[email protected]> wrote: > > > > > > > > How many CPUs are you saving load_cpu on? A trace event can't be bigger > > > than a page. And the data is actually a little less than that with the > > > required headers. > > > > The biggest system I've tested it on is an 8 cpu system (with > > NR_CPUS==8). So yes, small and we haven't seen any issues. > > > > Are you saying that we are siphoning too much data through ftrace? He > > find it really valuable to collect information during run and process > > it afterwards but I can see how this may not be feasible for systems > > with thousands of cpus. > > Only too much for a single event. Perhaps have the tracepoint post per > CPU? Then you wouldn't need that array.
Sounds good, I'll do that. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
