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- from __future__ import absolute_import, unicode_literals
-
- import time
-
- from django.template.loader import render_to_string
- from django.utils.translation import ugettext_lazy as _
-
- from debug_toolbar.panels import Panel
-
- try:
- import resource # Not available on Win32 systems
- except ImportError:
- resource = None
-
-
- class TimerPanel(Panel):
- """
- Panel that displays the time a response took in milliseconds.
- """
-
- def nav_subtitle(self):
- stats = self.get_stats()
- if hasattr(self, '_start_rusage'):
- utime = self._end_rusage.ru_utime - self._start_rusage.ru_utime
- stime = self._end_rusage.ru_stime - self._start_rusage.ru_stime
- return _("CPU: %(cum)0.2fms (%(total)0.2fms)") % {
- 'cum': (utime + stime) * 1000.0,
- 'total': stats['total_time']
- }
- elif 'total_time' in stats:
- return _("Total: %0.2fms") % stats['total_time']
- else:
- return ''
-
- has_content = resource is not None
-
- title = _("Time")
-
- template = 'debug_toolbar/panels/timer.html'
-
- @property
- def content(self):
- stats = self.get_stats()
- rows = (
- (_("User CPU time"), _("%(utime)0.3f msec") % stats),
- (_("System CPU time"), _("%(stime)0.3f msec") % stats),
- (_("Total CPU time"), _("%(total)0.3f msec") % stats),
- (_("Elapsed time"), _("%(total_time)0.3f msec") % stats),
- (_("Context switches"), _("%(vcsw)d voluntary, %(ivcsw)d involuntary") % stats),
- )
- return render_to_string(self.template, {'rows': rows})
-
- def process_request(self, request):
- self._start_time = time.time()
- if self.has_content:
- self._start_rusage = resource.getrusage(resource.RUSAGE_SELF)
-
- def generate_stats(self, request, response):
- stats = {}
- if hasattr(self, '_start_time'):
- stats['total_time'] = (time.time() - self._start_time) * 1000
- if hasattr(self, '_start_rusage'):
- self._end_rusage = resource.getrusage(resource.RUSAGE_SELF)
- stats['utime'] = 1000 * self._elapsed_ru('ru_utime')
- stats['stime'] = 1000 * self._elapsed_ru('ru_stime')
- stats['total'] = stats['utime'] + stats['stime']
- stats['vcsw'] = self._elapsed_ru('ru_nvcsw')
- stats['ivcsw'] = self._elapsed_ru('ru_nivcsw')
- stats['minflt'] = self._elapsed_ru('ru_minflt')
- stats['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. :-(
- #
- # stats['blkin'] = self._elapsed_ru('ru_inblock')
- # stats['blkout'] = self._elapsed_ru('ru_oublock')
- # stats['swap'] = self._elapsed_ru('ru_nswap')
- # stats['rss'] = self._end_rusage.ru_maxrss
- # stats['srss'] = self._end_rusage.ru_ixrss
- # stats['urss'] = self._end_rusage.ru_idrss
- # stats['usrss'] = self._end_rusage.ru_isrss
-
- self.record_stats(stats)
-
- def generate_server_timing(self, request, response):
- stats = self.get_stats()
-
- self.record_server_timing('utime', 'User CPU time', stats.get('utime', 0))
- self.record_server_timing('stime', 'System CPU time', stats.get('stime', 0))
- self.record_server_timing('total', 'Total CPU time', stats.get('total', 0))
- self.record_server_timing('total_time', 'Elapsed time', stats.get('total_time', 0))
-
- def _elapsed_ru(self, name):
- return getattr(self._end_rusage, name) - getattr(self._start_rusage, name)
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