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try:
import resource
except ImportError:
pass # Will fail on Win32 systems
import time
from django.template.loader import render_to_string
from django.utils.translation import ugettext_lazy as _
from debug_toolbar.panels import DebugPanel
class TimerDebugPanel(DebugPanel):
"""
Panel that displays the time a response took in milliseconds.
"""
name = 'Timer'
template = 'debug_toolbar/panels/timer.html'
try: # if resource module not available, don't show content panel
resource
except NameError:
has_content = False
has_resource = False
else:
has_content = True
has_resource = True
def process_request(self, request):
self._start_time = time.time()
if self.has_resource:
self._start_rusage = resource.getrusage(resource.RUSAGE_SELF)
def process_response(self, request, response):
total_time = (time.time() - self._start_time) * 1000
if self.has_resource:
self._end_rusage = resource.getrusage(resource.RUSAGE_SELF)
utime = 1000 * self._elapsed_ru('ru_utime')
stime = 1000 * self._elapsed_ru('ru_stime')
vcsw = self._elapsed_ru('ru_nvcsw')
ivcsw = self._elapsed_ru('ru_nivcsw')
minflt = self._elapsed_ru('ru_minflt')
majflt = self._elapsed_ru('ru_majflt')
# these are documented as not meaningful under Linux. If you're running BSD
# feel free to enable them, and add any others that I hadn't gotten to before
# I noticed that I was getting nothing but zeroes and that the docs agreed. :-(
#
# blkin = self._elapsed_ru('ru_inblock')
# blkout = self._elapsed_ru('ru_oublock')
# swap = self._elapsed_ru('ru_nswap')
# rss = self._end_rusage.ru_maxrss
# srss = self._end_rusage.ru_ixrss
# urss = self._end_rusage.ru_idrss
# usrss = self._end_rusage.ru_isrss
self.record_stats({
'total_time': total_time,
'utime': utime,
'stime': stime,
'vcsw': vcsw,
'ivcsw': ivcsw,
'minflt': minflt,
'majflt': majflt,
# 'blkin': blkin,
# 'blkout': blkout,
# 'swap': swap,
# 'rss': rss,
# 'urss': urss,
# 'srss': srss,
# 'usrss': usrss,
})
def nav_title(self):
return _('Time')
def nav_subtitle(self):
stats = self.get_stats()
# TODO l10n
if self.has_resource:
utime = self._end_rusage.ru_utime - self._start_rusage.ru_utime
stime = self._end_rusage.ru_stime - self._start_rusage.ru_stime
return 'CPU: %0.2fms (%0.2fms)' % ((utime + stime) * 1000.0, stats['total_time'])
else:
return 'TOTAL: %0.2fms' % (stats['total_time'])
def title(self):
return _('Resource Usage')
def url(self):
return ''
def _elapsed_ru(self, name):
return getattr(self._end_rusage, name) - getattr(self._start_rusage, name)
def content(self):
stats = self.get_stats()
# TODO l10n on values
rows = (
(_('User CPU time'), '%0.3f msec' % stats['utime']),
(_('System CPU time'), '%0.3f msec' % stats['stime']),
(_('Total CPU time'), '%0.3f msec' % (stats['utime'] + stats['stime'])),
(_('Elapsed time'), '%0.3f msec' % stats['total_time']),
(_('Context switches'), '%d voluntary, %d involuntary' % (stats['vcsw'], stats['ivcsw'])),
# ('Memory use', '%d max RSS, %d shared, %d unshared' % (stats['rss'], stats.['srss'],
# stats['urss'] + stats['usrss'])),
# ('Page faults', '%d no i/o, %d requiring i/o' % (stats['minflt'], stats['majflt'])),
# ('Disk operations', '%d in, %d out, %d swapout' % (stats['blkin'], stats['blkout'], stats['swap'])),
)
context = self.context.copy()
context.update({'rows': rows,})
return render_to_string(self.template, context)
|
