projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| b5976c2e AB |
1 | #!/usr/bin/env python |
| 2 | # -*- coding: utf-8 -*- | |
| 3 | # | |
| 4 | # Analyse lock events and compute statistics | |
| 5 | # | |
| 6 | # Author: Alex Bennée <[email protected]> | |
| 7 | # | |
| 8 | ||
| f03868bd | 9 | from __future__ import print_function |
| b5976c2e AB |
10 | import os |
| 11 | import simpletrace | |
| 12 | import argparse | |
| 13 | import numpy as np | |
| 14 | ||
| 15 | class MutexAnalyser(simpletrace.Analyzer): | |
| 16 | "A simpletrace Analyser for checking locks." | |
| 17 | ||
| 18 | def __init__(self): | |
| 19 | self.locks = 0 | |
| 20 | self.locked = 0 | |
| 21 | self.unlocks = 0 | |
| 22 | self.mutex_records = {} | |
| 23 | ||
| 24 | def _get_mutex(self, mutex): | |
| 25 | if not mutex in self.mutex_records: | |
| 26 | self.mutex_records[mutex] = {"locks": 0, | |
| 27 | "lock_time": 0, | |
| 28 | "acquire_times": [], | |
| 29 | "locked": 0, | |
| 30 | "locked_time": 0, | |
| 31 | "held_times": [], | |
| 32 | "unlocked": 0} | |
| 33 | ||
| 34 | return self.mutex_records[mutex] | |
| 35 | ||
| 36 | def qemu_mutex_lock(self, timestamp, mutex, filename, line): | |
| 37 | self.locks += 1 | |
| 38 | rec = self._get_mutex(mutex) | |
| 39 | rec["locks"] += 1 | |
| 40 | rec["lock_time"] = timestamp[0] | |
| 41 | rec["lock_loc"] = (filename, line) | |
| 42 | ||
| 43 | def qemu_mutex_locked(self, timestamp, mutex, filename, line): | |
| 44 | self.locked += 1 | |
| 45 | rec = self._get_mutex(mutex) | |
| 46 | rec["locked"] += 1 | |
| 47 | rec["locked_time"] = timestamp[0] | |
| 48 | acquire_time = rec["locked_time"] - rec["lock_time"] | |
| 49 | rec["locked_loc"] = (filename, line) | |
| 50 | rec["acquire_times"].append(acquire_time) | |
| 51 | ||
| 52 | def qemu_mutex_unlock(self, timestamp, mutex, filename, line): | |
| 53 | self.unlocks += 1 | |
| 54 | rec = self._get_mutex(mutex) | |
| 55 | rec["unlocked"] += 1 | |
| 56 | held_time = timestamp[0] - rec["locked_time"] | |
| 57 | rec["held_times"].append(held_time) | |
| 58 | rec["unlock_loc"] = (filename, line) | |
| 59 | ||
| 60 | ||
| 61 | def get_args(): | |
| 62 | "Grab options" | |
| 63 | parser = argparse.ArgumentParser() | |
| 64 | parser.add_argument("--output", "-o", type=str, help="Render plot to file") | |
| 65 | parser.add_argument("events", type=str, help='trace file read from') | |
| 66 | parser.add_argument("tracefile", type=str, help='trace file read from') | |
| 67 | return parser.parse_args() | |
| 68 | ||
| 69 | if __name__ == '__main__': | |
| 70 | args = get_args() | |
| 71 | ||
| 72 | # Gather data from the trace | |
| 73 | analyser = MutexAnalyser() | |
| 74 | simpletrace.process(args.events, args.tracefile, analyser) | |
| 75 | ||
| 76 | print ("Total locks: %d, locked: %d, unlocked: %d" % | |
| 77 | (analyser.locks, analyser.locked, analyser.unlocks)) | |
| 78 | ||
| 79 | # Now dump the individual lock stats | |
| 80 | for key, val in sorted(analyser.mutex_records.iteritems(), | |
| 5cdda8ce | 81 | key=lambda k_v: k_v[1]["locks"]): |
| b5976c2e AB |
82 | print ("Lock: %#x locks: %d, locked: %d, unlocked: %d" % |
| 83 | (key, val["locks"], val["locked"], val["unlocked"])) | |
| 84 | ||
| 85 | acquire_times = np.array(val["acquire_times"]) | |
| 86 | if len(acquire_times) > 0: | |
| 87 | print (" Acquire Time: min:%d median:%d avg:%.2f max:%d" % | |
| 88 | (acquire_times.min(), np.median(acquire_times), | |
| 89 | acquire_times.mean(), acquire_times.max())) | |
| 90 | ||
| 91 | held_times = np.array(val["held_times"]) | |
| 92 | if len(held_times) > 0: | |
| 93 | print (" Held Time: min:%d median:%d avg:%.2f max:%d" % | |
| 94 | (held_times.min(), np.median(held_times), | |
| 95 | held_times.mean(), held_times.max())) | |
| 96 | ||
| 97 | # Check if any locks still held | |
| 98 | if val["locks"] > val["locked"]: | |
| 99 | print (" LOCK HELD (%s:%s)" % (val["locked_loc"])) | |
| 100 | print (" BLOCKED (%s:%s)" % (val["lock_loc"])) |