FR: View combined results of multiple recordings.

[GitMensch]

Is your feature request related to a problem? Please describe. System wide profiling on an active machine gives lots of data, which is commonly not useful and may result in lost chunks and big files. Limiting this to a specific users helps, but on production machine the system user of an interesting program is not unlikely to be "all the same" for a lot of processes. To work around the recording issue, it is most easy to run multiple processes, each with perf record, which results in multiple smaller files. ... But how to view them combined afterwards?

File->Open only allows to open a single file and - I guess - just cat ing multiple files together won't work for neither perf.data.* nor *.perfparser.

Describe the solution you'd like Option to open multiple recordings at once (all in the same session, similar as it i done in a system/user wide recording) via File->Open, and possibly a File->Add option to post-add more recordings after the initial file(s) are opened.

Describe alternatives you've considered Uer-wide recording, but that will commonly record too much; wrapping multiple runs in a single shell script with async starts, but that needs to be written and may not be applicable, either.