app/django/core/handlers/profiler-hotshot.py
author Todd Larsen <tlarsen@google.com>
Sat, 18 Oct 2008 05:11:37 +0000
changeset 377 d94ec6f104cc
parent 54 03e267d67478
permissions -rw-r--r--
Refactor various site views into more generic locations, in preparation for using access permissions to decide the fuctionality in the view, instead of having lots of cut-and-paste copies of the same view functions. site/home.py into more generic home.py site/settings.py into more generic settings.py site/docs/list.py into more generic docs/list.py site/docs/edit.py into more generic docs/edit.py Patch by: Todd Larsen Review 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)