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authorOndřej Surý <ondrej@sury.org>2011-11-02 22:44:12 +0100
committerOndřej Surý <ondrej@sury.org>2011-11-02 22:44:12 +0100
commitc8d5977bb546dae9ed59d81556639c49badd8121 (patch)
tree4c86750db26c1c3502b60f2cd78ca9611cfa01d6 /src/common/latency.h
downloadknot-upstream/0.8.0_pre1.tar.gz
Imported Upstream version 0.8.0~pre1upstream/0.8.0_pre1
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+/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file latency.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Utilities for latency profiling.
+ *
+ * Selected calls latency profiler is enabled with PROF_LATENCY define.
+ * You can roughly profile own code with perf_begin() and perf_end() macros.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_LATENCY_H_
+#define _KNOTD_COMMON_LATENCY_H_
+
+/* Optional. */
+#ifdef PROF_LATENCY
+
+/* Do not include from latency.c */
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <pthread.h>
+
+/* Profiler tools */
+
+/*! \brief Time profile begin macro. */
+#define perf_begin() \
+do { \
+ struct timeval __begin; \
+ gettimeofday(&__begin, 0)
+
+/*! \brief Time profile end macro
+ * \param d Will contain the number of microseconds passed from perf_begin().
+ */
+#define perf_end(d) \
+ struct timeval __end; \
+ gettimeofday(&__end, 0); \
+ unsigned long __us = (__end.tv_sec - __begin.tv_sec) * 1000L * 1000L; \
+ __us += (__end.tv_usec - __begin.tv_usec); \
+ (d) = __us; \
+} while(0)
+
+/* Prototypes. */
+
+/*! \brief Profiled recvfrom(). */
+ssize_t pf_recvfrom(int socket, void *buf, size_t len, int flags,
+ struct sockaddr *from, socklen_t *fromlen,
+ const char* caller, const char* file, int line);
+
+/*! \brief Profiled sendto(). */
+ssize_t pf_sendto(int socket, const void *buf, size_t len, int flags,
+ const struct sockaddr *to, socklen_t tolen,
+ const char* caller, const char* file, int line);
+
+/*! \brief Profiled pthread_mutex_lock(). */
+int pf_pthread_mutex_lock(pthread_mutex_t *mutex,
+ const char* caller, const char* file, int line);
+
+/*! \brief Profiled pthread_mutex_unlock(). */
+int pf_pthread_mutex_unlock(pthread_mutex_t *mutex,
+ const char* caller, const char* file, int line);
+
+/*
+ * Sockets.
+ */
+
+/*! \brief Rerouted recvfrom(). */
+#define recvfrom(s, buf, len, flags, from, fromlen) \
+ pf_recvfrom((s), (buf), (len), (flags), (from), (fromlen), \
+ __FUNCTION__, __FILE__, __LINE__)
+
+/*! \brief Rerouted sendto(). */
+#define sendto(s, buf, len, flags, to, tolen) \
+ pf_sendto((s), (buf), (len), (flags), (to), (tolen), \
+ __FUNCTION__, __FILE__, __LINE__)
+
+/*
+ * Pthreads.
+ */
+
+/*! \brief Rerouted pthread_mutex_lock(). */
+#define pthread_mutex_lock(m) \
+ pf_pthread_mutex_lock(m, __FUNCTION__, __FILE__, __LINE__)
+
+/*! \brief Rerouted pthread_mutex_unlock(). */
+#define pthread_mutex_unlock(m) \
+ pf_pthread_mutex_unlock(m, __FUNCTION__, __FILE__, __LINE__)
+
+#else // PROF_LATENCY
+
+/* Profiler tools */
+#define perf_begin()
+#define perf_end(d)
+
+#endif // PROF_LATENCY
+#endif // _KNOTD_COMMON_LATENCY_H_
+
+/*! @} */