app/django/core/handlers/profiler-hotshot.py
author Madhusudan C.S. <madhusudancs@gmail.com>
Fri, 05 Jun 2009 21:27:03 +0200
changeset 2397 d943fa182fae
parent 54 03e267d67478
permissions -rw-r--r--
Moved the GHOP module into the modules package. This also includes moving the templates and content into their respective place inside the Soc folder. This is to avoid adding every folder to the app.yaml file. Patch by: Madhusudan C.S. and Lennard de Rijk Reviewed by: Lennard de Rijk

import hotshot, time, os
from django.core.handlers.modpython import ModPythonHandler

PROFILE_DATA_DIR = "/var/log/cmsprofile"

def handler(req):
    '''
    Handler that uses hotshot to store profile data.

    Stores profile data in PROFILE_DATA_DIR.  Since hotshot has no way (that I
    know of) to append profile data to a single file, each request gets its own
    profile.  The file names are in the format <url>.<n>.prof where <url> is
    the request path with "/" replaced by ".", and <n> is a timestamp with
    microseconds to prevent overwriting files.

    Use the gather_profile_stats.py script to gather these individual request
    profiles into aggregated profiles by request path.
    '''
    profname = "%s.%.3f.prof" % (req.uri.strip("/").replace('/', '.'), time.time())
    profname = os.path.join(PROFILE_DATA_DIR, profname)
    prof = hotshot.Profile(profname)
    return prof.runcall(ModPythonHandler(), req)