Visualize .orbit output data in case of CLI version

[alexkalmuk]

I'd like to know if there is a way to somehow get human readable data from .orbit (in my case it's hello_2023_03_09_14_00_13.orbit) output file. I'm using WITH_GUI=OFF version.

[florian-kuebler]

That should be pretty straightforward to archive. I do see two possible ways:

1. While the capture file has some custom structure (see FORMAT.md), the interesting content is the capture section, which contains protobufs. So they can be read and converted to a textproto.
2. We should have the capability to read orbit captures in python/jupyter notebooks. See https://github.com/google/orbit/tree/main/contrib/jupyter.

[alexkalmuk]

Thanks, I'll give a try to point 2 (python) first.

[alexkalmuk]

This python stuff works, and it's possible to print out all the captured events. But now it seems that OrbitClientGgp doesn't work properly or I'm doing something wrongly. I have a very simple program with 3 functions inside, which I'm profiling for 10 sec with GUI version (./bin/Orbit) and it shows me my 3 functions in the output with almost perfect estimation of time consumed per function. If I try CLI version:

./bin/OrbitClientGgp --file_directory hello_out --pid 80020

It finds debug info successfully, profiles for 10 seconds, saves the trace and exits. When I'm loading this trace into Orbit GUI - it's shows nothing. When I'm analizing it with python scripts - no events mentioning any functions.

I plan to debug it somehow and would appreciate any ideas about what could be the reason.

[alexkalmuk]

I plan to debug it somehow and would appreciate any ideas about what could be the reason.

Fixed by #4818

[florian-kuebler]

Thanks for the fix. Hope that it works now on your side!

[alexkalmuk]

Yes, it seems to be working. At least now I'm able to "Load capture" with a .orbit file generated by OrbitClientGgp, and it looks exactly like the capture produced by the gui version.