Callgrind with a simple patch, add option --collect-openclose.

--collect-openclose is to counting Ir between first time opening testcase and last time closing output file.

It is used in online judge system, we use callgrind to measuring algorithm performance (use cpu instruction).

--collect-openclose option can avoid to counting too much cost at VM initialization(ex. jvm), because it has nothing to do with algorithm performance.

git clone https://github.com/u1240976/callgrind_coc
cd callgrind_coc
git submodule init
git submodule update

• preparation

  We need autotools, GNU make, and gcc to build valgrind.

  example in centos7:

  yum install autoconf
  yum install automake
  yum install gcc-c++
  

building step is same as valgrind.

refer to build valgrind tool:

./autogen.sh
./configure --prefix=`pwd`/inst
make
make install

The executable is inst/bin/valgrind.

see cg_patch_test/testing.sh.

build test code: make

run test code: ./testing.sh

• --collect-openclose=<yes|no>
  • open functionality of this patch.
• [TODO] --collect-openfile=<filename>
• [TODO] --collect-closefile=<filename>

To Be Completed

• patched source: callgrind/: main.c, clo.c, global.h
• test code: cg_patch_test/