gperftools.md

Set up gperftools

Installation

OS X

Make sure you have Xcode command line tools (e.g. clang++), brew and go.

# optional
brew install llvm

# pprof is its dependency
brew install gperftools
go get github.com/google/pprof

Linux

# compile gperftools from source code
git clone https://github.com/gperftools/gperftools.git
cd gperftools
./autogen.sh
./configure
make && make check
make install

# install pprof
go get github.com/google/pprof

Time

# compile 
clang++ -std=c++17 -Og -g3 -Wl,-no_pie -lprofiler puzzle.cpp -o puzzle # OS X
g++ -std=c++17 -Og -g3 -lprofiler puzzle.cpp -o puzzle # linux

# run
env CPUPROFILE=puzzle.prof ./puzzle -qo list < huge2.txt > output.txt

# report
pprof --list=main puzzle.prof

Memory

# compile
clang++ -std=c++17 -Og -g3 -Wl,-no_pie -ltcmalloc puzzle.cpp -o puzzle # OS X
g++ -std=c++17 -Og -g3 -ltcmalloc puzzle.cpp -o puzzle # linux

# run
env HEAPPROFILE=puzzle.prof ./puzzle -qo list < huge2.txt > output.txt

# report (specify the largest heap prof file)
pprof --list=main puzzle.prof.0003.heap

Tips

• You may need check the GOPATH and find the pprof installed by go get. Use pprof installed by go.
• If you do not have root access, you need specify prefix and library path for profiler and tcmalloc.

Contributors

• LukeXuan
• Airtnp
• JasonQSY