[Feature]: Add ability to disable and enable categories at runtime

[ADGLY]

Suggestion Description

Hello,

I am currently running inference on a large model using pytorch and multiple processes. I manage to gather perfetto traces however the output is very large. I am only interested in some iterations in the middle. I am currently using: #235 to reduce the size of the trace as much as possible. However, I would really like to have a more fine grained option that would allow me to decide when to start and stop the tracing (and do that multiple during a run). I went through the source code quickly and it seems that this enable/disable category feature is used for the delayed trace start.

Operating System

Ubuntu

GPU

No response

ROCm Component

No response

[jrmadsen]

I'm a bit confused by what you are asking for here. Is this request not satisfied by the OMNITRACE_ENABLE_CATEGORIES and OMNITRACE_DISABLE_CATEGORIES configuration options noted in #235?

omnitrace/source/lib/core/config.cpp

Line 677 in 0cf0172

OMNITRACE_CONFIG_SETTING(std::string, "OMNITRACE_ENABLE_CATEGORIES",

omnitrace/source/lib/core/config.cpp

Line 685 in 0cf0172

std::string, "OMNITRACE_DISABLE_CATEGORIES",

[ADGLY]

Hi, thank you for the quick reply.

Reading my comment I admit this was not very clear.

From what I understand these variables should be set at the start of omnitrace run and define the categories to trace for the whole run. Unless, I am misunderstanding something these variables cannot be changed during a "tracing run".
What I would like to do is something like this:

omnitrace-run --trace-stopped -- python my_script.py

And inside my my_script.py:

for i in range(100):
...code_that_should_not_be_traced...
if i > 10 and i < 15:
     (handle to loaded so file).start()
...traced_code...
if i > 10 and i < 15:
    (handle to loaded so file).stop()
...code_after_section_of_interest...

Thank you again for your time and help.

[sohaibnd]

Hi @ADGLY, sorry for the delay. Perhaps selective instrumentation and source instrumentation can serve your purpose?