> Hey. > > Some of you may know Honza's images about CPU utilization and memory usage > when using LTO [1]. Last week I played with Chromium and Firefox and I wanted > to visualize their utilization. That's why I came up with a new script [2]. > > You can easily wrap a command and the script generates graphs for you:. > The script uses modern psutil library and plots through a great matplotlib: > $ usage-wrapper.py -v -t postgresql 'make -j16' > ... > $ eog usage.svg > > There's a gallery of the collected reports for Firefox and Chromium: > https://gist.github.com/marxin/223890df4d8d8e490b6b2918b77dacad
Thanks, it looks nice. I am not sure what the blue line means - if it is overall usage of vmstat then I guess you do not calculate COW of the stream out processes correctly and that is why you get so high peak on them. > > and yes, we have a LTO regression since GCC 9 that I'm going to take closer > to. Where do you see the regression? (just trying to make sense of the numbers). For Firefox I see you get around 16GB streaming memory peak and 32GB for ltranses which seems kind of acceptable for such a large parallelism. Do you have time report for Cromium WPA? It seems to be stuck on something for quite a while. I would say that simple time report + ideally perf profile should make it possible to track this down. Honza > > Martin > > [1] > https://4.bp.blogspot.com/-fvrkYSMBqug/XMsTqg4HEkI/AAAAAAAAGl8/8sp1GWv6Oe8tfBfL6aO8Nbq5j3hExurpwCEwYBhgL/s1600/llvm.png > [2] https://github.com/marxin/script-misc/blob/master/usage-wrapper.py
