Em Mon, Dec 14, 2015 at 05:41:30PM +0100, Peter Zijlstra escreveu: > On Mon, Dec 14, 2015 at 01:26:55PM -0300, Arnaldo Carvalho de Melo wrote: > > Em Mon, Dec 14, 2015 at 07:55:32AM -0700, David Ahern escreveu: > > > On 12/14/15 2:38 AM, Ingo Molnar wrote: > > > > > > > >>And in an unrelated note, I absolutely detest --buildid being the > > > >>default, it makes perf-record blow chunks. > > > Multiple things here, .debug/ should be size limited, and buildid > > processing doesn't need necessarily to store things in that cache, I bet > > what PeterZ is complaining about is the reprocessing of events at the > > end of the session, to find out about the PERF_RECORD_MMAP* events to > > then read the build-ids and insert then into the perf.data file header. > > > > Yeah, its the reprocessing that is taking forever.. On my moderately > sized system with 40 CPUs, the reprocessing is taking about as long as > the actual workload, which is tedious.
Right, I thought about using some dummy event for tracking mmaps, which I think is a technique used by the Intel PT code (well, there it uses it for sched_switches) will check... > Once I figured out what was happening Jiri was quick to point out I > should be using -B. Right, we have to have sane behaviour by default, damn long/high freq workloads, duh ;-) - Arnaldo -- 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/
