app/django/core/handlers/profiler-hotshot.py
author Augie Fackler <durin42@gmail.com>
Tue, 07 Jul 2009 20:17:23 -0500
changeset 2587 ec7818110fd2
parent 54 03e267d67478
permissions -rw-r--r--
Start using buildout to bring in external dependencies. This makes running tests easier in situations where dependencies are not always available, such as buildbot. Thanks to Matthew Wilkes <matthew@matthewwilkes.co.uk> for help and moral support.

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)