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, jirka
