On Thu, Aug 25, 2016 at 02:20:40PM -0600, Mathieu Poirier wrote: SNIP
> perf record -e some_event/@cfg1,@cfg2=config/ ... > > The above are all valid configuration and will see the strings 'cfg1' > and 'cfg2=config' sent to the PMU driver for parsing and interpretation > using the existing ioctl() mechanism. > > The primary customers for this feature are the CoreSight drivers where > the selection of a sink (where trace data is accumulated) needs to be > done in a previous, and separated step, from the launching of the perf > command. > > As such something that used to be a two-step process: > > # echo 1 > /sys/bus/coresight/devices/20070000.etr/enable_sink > # perf record -e cs_etm//u --per-thread uname > > is integrated in a single command: > > # perf record -e cs_etm/@20070000.etr/u --per-thread uname > > Thanks, > Mathieu > > Changes for V6: > - Using sysFS rather than an ioctl() to communicate command line > parameters to the CoreSight PMU. apart from few nits it looks good.. but can't say for patch 2/5 ;-) Acked-by: Jiri Olsa <jo...@kernel.org> thanks, jirka
