Code profiling and load testing Pressflow on CentOS 5

Owned by Former user (Deleted)

Last updated: May 25, 2011 by AnonymousVersion comment

1 min read

Profiling setup

Install xdebug (see Stack installation on CentOS 5)
- Configure with the option:
```
xdebug.profiler_enable_trigger = 1
```
- Do not enable any other profiling option.
Install cg2dot.py (via xdebugtoolkit)
Install graphviz
Install ghostscript

Running load tests

Clear out CacheGrind results from /tmp.
Make a single request:
```
ab  -n 1 -c 1 [url]&XDEBUG_PROFILE=1
```
CacheGrind output will be on /tmp.

Processing results

Initial setup (do this once):

svn co http://xdebugtoolkit.googlecode.com/svn/tags/0.1.5/xdebugtoolkit/ ~/xdebugtoolkit
echo "export PATH=~/xdebugtoolkit:$PATH" >> ~/.bashrc

Convert the cachegrind output to a .dot file:
```
cg2dot.py cachegrind.out.XYZ > cg.dot
```
Convert the .dot file into PDF-compatible PostScript:
```
dot cg.dot -Tsvg -ocg.svg
```
The SVG will be named cg.svg.