[llvm-dev] test-release.sh run memory usage

Neil Nelson via llvm-dev llvm-dev at lists.llvm.org
Thu Aug 22 19:43:17 PDT 2019

The attached chart shows second by second memory usage of a 4 processor 
run of test-release.sh in a VM. A run of approximately 20 hours. The 
chart is megabytes vertical and seconds horizontal.

What may or may not interesting are the two relatively (relative to the 
rest of the run) large memory usage spikes. The first toward the middle 
and the second toward the end.

At the first spike there are 155 LLVM related threads.

tmp-Fuzz 97
llvm-symbolizer 46

36 threads are using from 300-400 megabytes.

The spike appears to be positively correlated though not likely linear 
with the number of processors with a 7 processor run using close to 25 
gigabytes at the spike.

Regards, Neil Nelson

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