On Sun, Nov 04, 2018 at 04:50:39PM -0800, David Miller wrote: > From: Jiri Olsa <jo...@redhat.com> > Date: Sun, 4 Nov 2018 21:18:21 +0100 > > > do you have some code I could check on? > > All I have is this patch which parallelizes the mmap readers in perf > top.
I put something together.. still testing, but it's already showing 0 lost events when for 'overwrite = 0' case even for high load.. the old code shows ~1500 for same workload I'm printing lost event counts in stdio output header: # perf top -d 1 --stdio PerfTop: 5734 irqs/sec kernel:57.3% exact: 100.0% lost: 0 [4000Hz cycles:ppp], (all, 8 CPUs) will probably add it to tui as well, seems useful I pushed it in perf/fixes branch in: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git it's stil work in prograss.. not too manye complete changelogs ;-) jirka