app/django/core/handlers/profiler-hotshot.py
author Todd Larsen <tlarsen@google.com>
Fri, 18 Jul 2008 18:22:23 +0000
changeset 54 03e267d67478
permissions -rw-r--r--
Major reorganization of the soc svn repo, to merge into a single App Engine image (to make development easier, now that only a single app will run all Google Open Source programs).
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
54
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     1
import hotshot, time, os
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     2
from django.core.handlers.modpython import ModPythonHandler
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     3
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     4
PROFILE_DATA_DIR = "/var/log/cmsprofile"
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     5
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     6
def handler(req):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     7
    '''
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     8
    Handler that uses hotshot to store profile data.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
     9
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    10
    Stores profile data in PROFILE_DATA_DIR.  Since hotshot has no way (that I
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    11
    know of) to append profile data to a single file, each request gets its own
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    12
    profile.  The file names are in the format <url>.<n>.prof where <url> is
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    13
    the request path with "/" replaced by ".", and <n> is a timestamp with
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    14
    microseconds to prevent overwriting files.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    15
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    16
    Use the gather_profile_stats.py script to gather these individual request
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    17
    profiles into aggregated profiles by request path.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    18
    '''
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    19
    profname = "%s.%.3f.prof" % (req.uri.strip("/").replace('/', '.'), time.time())
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    20
    profname = os.path.join(PROFILE_DATA_DIR, profname)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    21
    prof = hotshot.Profile(profname)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
    22
    return prof.runcall(ModPythonHandler(), req)