Mathieu Poirier [off-list ref] writes:

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/@sink=20070000.etr/u --per-thread  uname

Can't we simply teach perf record to write 1 to that sysfs attribute and
avoid parsing more ascii strings in the kernel? I suspect that would also
take way less code.

Are there any other use cases for this besides specifying @sink for a
ETM?

Regards,
--
Alex