1import time 2 3from django.template.loader import render_to_string 4from django.templatetags.static import static 5from django.utils.translation import gettext_lazy as _ 6 7from debug_toolbar.panels import Panel 8 9try: 10 import resource # Not available on Win32 systems 11except ImportError: 12 resource = None 13 14 15class TimerPanel(Panel): 16 """ 17 Panel that displays the time a response took in milliseconds. 18 """ 19 20 def nav_subtitle(self): 21 stats = self.get_stats() 22 if hasattr(self, "_start_rusage"): 23 utime = self._end_rusage.ru_utime - self._start_rusage.ru_utime 24 stime = self._end_rusage.ru_stime - self._start_rusage.ru_stime 25 return _("CPU: %(cum)0.2fms (%(total)0.2fms)") % { 26 "cum": (utime + stime) * 1000.0, 27 "total": stats["total_time"], 28 } 29 elif "total_time" in stats: 30 return _("Total: %0.2fms") % stats["total_time"] 31 else: 32 return "" 33 34 has_content = resource is not None 35 36 title = _("Time") 37 38 template = "debug_toolbar/panels/timer.html" 39 40 @property 41 def content(self): 42 stats = self.get_stats() 43 rows = ( 44 (_("User CPU time"), _("%(utime)0.3f msec") % stats), 45 (_("System CPU time"), _("%(stime)0.3f msec") % stats), 46 (_("Total CPU time"), _("%(total)0.3f msec") % stats), 47 (_("Elapsed time"), _("%(total_time)0.3f msec") % stats), 48 ( 49 _("Context switches"), 50 _("%(vcsw)d voluntary, %(ivcsw)d involuntary") % stats, 51 ), 52 ) 53 return render_to_string(self.template, {"rows": rows}) 54 55 @property 56 def scripts(self): 57 scripts = super().scripts 58 scripts.append(static("debug_toolbar/js/timer.js")) 59 return scripts 60 61 def process_request(self, request): 62 self._start_time = time.time() 63 if self.has_content: 64 self._start_rusage = resource.getrusage(resource.RUSAGE_SELF) 65 return super().process_request(request) 66 67 def generate_stats(self, request, response): 68 stats = {} 69 if hasattr(self, "_start_time"): 70 stats["total_time"] = (time.time() - self._start_time) * 1000 71 if hasattr(self, "_start_rusage"): 72 self._end_rusage = resource.getrusage(resource.RUSAGE_SELF) 73 stats["utime"] = 1000 * self._elapsed_ru("ru_utime") 74 stats["stime"] = 1000 * self._elapsed_ru("ru_stime") 75 stats["total"] = stats["utime"] + stats["stime"] 76 stats["vcsw"] = self._elapsed_ru("ru_nvcsw") 77 stats["ivcsw"] = self._elapsed_ru("ru_nivcsw") 78 stats["minflt"] = self._elapsed_ru("ru_minflt") 79 stats["majflt"] = self._elapsed_ru("ru_majflt") 80 # these are documented as not meaningful under Linux. If you're 81 # running BSD feel free to enable them, and add any others that I 82 # hadn't gotten to before I noticed that I was getting nothing but 83 # zeroes and that the docs agreed. :-( 84 # 85 # stats['blkin'] = self._elapsed_ru('ru_inblock') 86 # stats['blkout'] = self._elapsed_ru('ru_oublock') 87 # stats['swap'] = self._elapsed_ru('ru_nswap') 88 # stats['rss'] = self._end_rusage.ru_maxrss 89 # stats['srss'] = self._end_rusage.ru_ixrss 90 # stats['urss'] = self._end_rusage.ru_idrss 91 # stats['usrss'] = self._end_rusage.ru_isrss 92 93 self.record_stats(stats) 94 95 def generate_server_timing(self, request, response): 96 stats = self.get_stats() 97 98 self.record_server_timing("utime", "User CPU time", stats.get("utime", 0)) 99 self.record_server_timing("stime", "System CPU time", stats.get("stime", 0)) 100 self.record_server_timing("total", "Total CPU time", stats.get("total", 0)) 101 self.record_server_timing( 102 "total_time", "Elapsed time", stats.get("total_time", 0) 103 ) 104 105 def _elapsed_ru(self, name): 106 return getattr(self._end_rusage, name) - getattr(self._start_rusage, name) 107