On 10/11/22 18:17, Valentin Schneider wrote:

Thinking out loud, it makes way more sense to record a cpumask in the
tracepoint, but perhaps we could have a postprocessing step to transform
those into N events each targeting a single CPU?

My approach on the tracers/rtla is to make the simple things in kernel, and beautify
things in user-space.

You could keep the tracepoint as a mask, and then make it pretty, like cpus=3-5,8
in user-space. For example with a trace-cmd/perf loadable plugin, libtracefs helper.

For rtla I was thinking to make a new tool to parse them. and make it pretty there.

-- Daniel