Em Wed, Apr 04, 2018 at 09:05:16AM +0200, Jiri Olsa escreveu: > On Tue, Apr 03, 2018 at 09:18:33PM +0300, Alexey Budankov wrote: > > > > Currently print count interval for performance counters values is > > limited by 10ms so reading the values at frequencies higher than 100Hz > > is restricted by the tool. > > > > This change makes perf stat -I possible on frequencies up to 1KHz and, > > to some extent, makes perf stat -I to be on-par with perf record > > sampling profiling. > > > > When running perf stat -I for monitoring e.g. PCIe uncore counters and > > at the same time profiling some I/O workload by perf record e.g. for > > cpu-cycles and context switches, it is then possible to observe > > consolidated CPU/OS/IO(Uncore) performance picture for that workload. > > > > Tool overhead warning printed when specifying -v option can be missed > > due to screen scrolling in case you have output to the console > > so message is moved into help available by running perf stat -h. > > > > Signed-off-by: Alexey Budankov <alexey.budan...@linux.intel.com> > > --- > > > > Changes in v2: > > - updated minimum value to 1ms at perf-stat.txt manual > > Acked-by: Jiri Olsa <jo...@kernel.org>
Thanks, applied to perf/core. - Arnaldo
