[llvm-dev] Performance metrics with LLVM

Tobias Grosser via llvm-dev llvm-dev at lists.llvm.org
Mon Jul 3 23:27:32 PDT 2017

Dear all, 

I wanted to gather LLVM statistics with lnt and found a nice flag, but
am unsure how such statistics can be made available in the LNT web

which allows me to gather all the LLVM "-stats" output. On top of this I
see that the LNT cmake test-suite also dumps code-size statistics when
running, that look as follows:

size: 10848 
size..bss: 48 
size..comment: 218 
size..ctors: 16 
size..data: 4 
size..dtors: 16 
size..dynamic: 416 
size..dynsym: 168 
size..eh_frame: 172 
size..eh_frame_hdr: 44 

I can find all these statistics in a file called:


but they do not appear in:


and in fact do not seem to be submitted to the LNT server.

Matthias added support for TEST_SUITE_COLLECT_STATS a while ago, but I
am unsure how it is expected to be used. A google search did not find
any relevant documentation. Is anybody using this feature today?


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