How to profile WebRTC performance? Get the function run time and generate call graph

[陳宣甫]

Dear all,

Call graph can be dynamic or static.

How to get functions run time and generate call graph from WebRTC Native C++ example peerconnection?

I use tceetree to get the static call graph from WebRTC project.

filename:webrtc_src_with_filename.svg

I try callgrind part of Valgrind to get the dynamic call graph.

When running peerconnection_client get Fatal error.

the peerconnection example drop and not show webcam screen.

command: $ valgrind --tool=callgrind ./peerconnection_client

error:

# Fatal error in: ../../system_wrappers/source/denormal_disabler.cc, line 82
# last system error: 1
# Check failed: !DenormalsEnabled(ReadStatusWord())

Could someone help me please?

Best regard and thanks.

[V I]

It looks like a crash. Why don't you use gdb on the core dump to see the call stack? ulimit -c unlimited / [maybe disable apport] / run peerconnection_client / gdb peerconnection_client core.12345 / bt full

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[陳宣甫]

Thank for reply.

Is it  the commnad like the following ?

$ gdb valgrind --tool=callgrind ./peerconnection_client 

use gdb command to debug?

like next, backtrace(bt), next(n) to know to crash reason?

Best regard and thanks.

witaly...@gmail.com 在 2022年9月14日 星期三上午11:19:48 [UTC+8] 的信中寫道：