103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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* Copyright (C) 2008 Tobias Brunner
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* Copyright (C) 2008 Martin Willi
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef THREADING_LOCK_PROFILER_H_
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#define THREADING_LOCK_PROFILER_H_
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#ifdef LOCK_PROFILER
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#include <time.h>
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/**
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* Do not report mutexes with an overall waiting time smaller than this (in us)
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*/
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#define PROFILE_WAIT_TRESHOLD 10000
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/**
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* Do not report mutexes with an overall lock count smaller than this
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*/
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#define PROFILE_LOCK_TRESHOLD 1000
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#include <utils/backtrace.h>
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typedef struct lock_profile_t lock_profile_t;
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struct lock_profile_t {
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/**
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* how long threads have waited for the lock in this mutex so far
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*/
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timeval_t waited;
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/**
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* How many times the lock has been invoked
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*/
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u_int locked;
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/**
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* backtrace where mutex has been created
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*/
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backtrace_t *backtrace;
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};
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/**
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* Print and cleanup mutex profiler
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*/
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static inline void profiler_cleanup(lock_profile_t *profile)
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{
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if (profile->waited.tv_sec > 0 ||
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profile->waited.tv_usec > PROFILE_WAIT_TRESHOLD ||
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profile->locked > PROFILE_LOCK_TRESHOLD)
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{
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fprintf(stderr, "%d.%03ds / %d times in lock created at:",
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profile->waited.tv_sec, profile->waited.tv_usec, profile->locked);
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profile->backtrace->log(profile->backtrace, stderr, TRUE);
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}
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profile->backtrace->destroy(profile->backtrace);
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}
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/**
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* Initialize mutex profiler
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*/
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static inline void profiler_init(lock_profile_t *profile)
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{
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profile->backtrace = backtrace_create(2);
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timerclear(&profile->waited);
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profile->locked = 0;
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}
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#define profiler_start(profile) { \
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struct timeval _start, _end, _diff; \
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(profile)->locked++; \
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time_monotonic(&_start);
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#define profiler_end(profile) \
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time_monotonic(&_end); \
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timersub(&_end, &_start, &_diff); \
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timeradd(&(profile)->waited, &_diff, &(profile)->waited); }
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#else /* !LOCK_PROFILER */
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#define lock_profile_t struct {}
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#define profiler_cleanup(...) {}
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#define profiler_init(...) {}
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#define profiler_start(...) {}
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#define profiler_end(...) {}
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#endif /* LOCK_PROFILER */
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#endif /* THREADING_LOCK_PROFILER_H_ */
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