app/django/core/handlers/profiler-hotshot.py
author Lennard de Rijk <ljvderijk@gmail.com>
Thu, 05 Mar 2009 17:44:48 +0000
changeset 1676 a3c33bef2ea8
parent 54 03e267d67478
permissions -rw-r--r--
Organization Proposals list now correctly sorts. Changed the index.yaml to reflect this. (Removed old entry). Also added a TODO to change this list once http://code.google.com/p/googleappengine/issues/detail?id=1100 is fixed. This means we can't properly sort when using the IN operator on another property then we are sorting on. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed

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)