profiling on linux jonathan lambrechts

installer libprofiler.so

apt install libgoogle-perftools-dev

installer un meilleurs pprof (grace a golang)

apt install golang

GOPATH=$HOME/go go get github.com/google/pprof

Be careful, an error may occur undefined os.UserConfigDir. In this case, you will have to update the go version or use an older version of pprof. see this ink. It seems that sudo apt install golang-go works :-)

Profile the ./myexe

LD_PRELOAD=/usr/lib/libprofiler.so CPUPROFILE=prof ./myexe

Careful, the access path to libprofilermay change !
For example:
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libprofiler.so CPUPROFILE=prof ./my_exe

show online the results

~/go/bin/pprof -http localhost:8000 prof

The package graphViz is needed.

sudo apt install graphviz

use this line create a pdf :

~/go/bin/pprof -pdf prof > my_pdf_prof.pdf

and open it :

evince my_pdf_prof.pdf

Remark :

Be careful of your versions: current pprof (august 2020) is not compatible with go version < 1.13. You should update go or use older version of pprof. (