Added: freeswitch/trunk/src/include/switch_profile.h (0 => 16963)
--- freeswitch/trunk/src/include/switch_profile.h (rev 0)
+++ freeswitch/trunk/src/include/switch_profile.h 2010-03-10 20:44:36 UTC (rev 16963)
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2009, Sangoma Technologies
+ * Moises Silva <moy@sangoma.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*! \brief opaque profile timer structure */
+struct profile_timer;
+typedef struct profile_timer switch_profile_timer_t;
+
+/*!
+ * \brief create a new profile timer
+ * \return profile timer structure previously created with new_profile_timer, NULL on error
+ */
+SWITCH_DECLARE(switch_profile_timer_t *) switch_new_profile_timer(void);
+
+/*!
+ * \brief provides the percentage of idle system time
+ * \param p profile timer structure previously created with new_profile_timer
+ * \param pointer to store the percentage of idle time
+ * \return -1 on error 0 for success
+ */
+SWITCH_DECLARE(int) switch_get_system_idle_time(switch_profile_timer_t *p, double *idle_percentage);
+
+
+/*!
+ * \brief Deletes profile timer
+ */
+SWITCH_DECLARE(void) switch_delete_profile_timer(switch_profile_timer_t **p);
+
Added: freeswitch/trunk/src/switch_profile.c (0 => 16963)
--- freeswitch/trunk/src/switch_profile.c (rev 0)
+++ freeswitch/trunk/src/switch_profile.c 2010-03-10 20:44:36 UTC (rev 16963)
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2009, Sangoma Technologies
+ * Moises Silva <moy@sangoma.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "switch.h"
+#include "switch_profile.h"
+
+#ifdef __linux__
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <errno.h>
+#else
+#define _WIN32_WINNT 0x0501 // To make GetSystemTimes visible in windows.h
+#include <windows.h>
+#endif
+
+struct profile_timer
+{
+ /* bool, just used to retrieve the values for the first time and not calculate the percentage of idle time */
+ int valid_last_times;
+
+ /* last calculated percentage of idle time */
+ double last_percentage_of_idle_time;
+
+#ifdef __linux__
+ /* all of these are the Linux jiffies last retrieved count */
+ unsigned long long last_user_time;
+ unsigned long long last_system_time;
+ unsigned long long last_idle_time;
+
+ unsigned long long last_nice_time;
+ unsigned long long last_irq_time;
+ unsigned long long last_soft_irq_time;
+ unsigned long long last_io_wait_time;
+ unsigned long long last_steal_time;
+
+ /* /proc/stat file descriptor used to retrieve the counters */
+ int procfd;
+ int initd;
+#else
+ __int64 i64LastUserTime;
+ __int64 i64LastKernelTime;
+ __int64 i64LastIdleTime;
+#endif
+};
+
+#ifdef __linux__
+static int read_cpu_stats(switch_profile_timer_t *p,
+ unsigned long long *user,
+ unsigned long long *nice,
+ unsigned long long *system,
+ unsigned long long *idle,
+ unsigned long long *iowait,
+ unsigned long long *irq,
+ unsigned long long *softirq,
+ unsigned long long *steal)
+{
+// the output of proc should not change that often from one kernel to other
+// see fs/proc/proc_misc.c or fs/proc/stat.c in the Linux kernel for more details
+// also man 5 proc is useful
+#define CPU_ELEMENTS 8 // change this if you change the format string
+#define CPU_INFO_FORMAT "cpu %llu %llu %llu %llu %llu %llu %llu %llu"
+ static const char procfile[] = "/proc/stat";
+ int rc = 0;
+ int myerrno = 0;
+ int elements = 0;
+ const char *cpustr = NULL;
+ char statbuff[1024];
+
+ if (!p->initd) {
+ p->procfd = open(procfile, O_RDONLY, 0);
+ if(p->procfd == -1) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Failed to open CPU statistics file %s: %s\n", procfile, strerror(myerrno));
+ return -1;
+ }
+ p->initd = 1;
+ } else {
+ lseek(p->procfd, 0L, SEEK_SET);
+ }
+
+ rc = read(p->procfd, statbuff, sizeof(statbuff) - 1);
+ if (rc <= 0) {
+ myerrno = errno;
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Failed to read CPU statistics file %s: %s\n", procfile, strerror(myerrno));
+ return -1;
+ }
+
+ cpustr = strstr(statbuff, "cpu ");
+ if (!cpustr) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "wrong format for Linux proc cpu statistics: missing cpu string\n");
+ return -1;
+ }
+
+ elements = sscanf(cpustr, CPU_INFO_FORMAT, user, nice, system, idle, iowait, irq, softirq, steal);
+ if (elements != CPU_ELEMENTS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "wrong format for Linux proc cpu statistics: expected %d elements, but just found %d\n", CPU_ELEMENTS, elements);
+ return -1;
+ }
+ return 0;
+}
+#endif
+
+#ifdef __linux__
+SWITCH_DECLARE(int) switch_get_system_idle_time(switch_profile_timer_t *p, double *idle_percentage)
+{
+ unsigned long long user, nice, system, idle, iowait, irq, softirq, steal;
+ unsigned long long usertime, kerneltime, idletime, totaltime, halftime;
+
+ if (read_cpu_stats(p, &user, &nice, &system, &idle, &iowait, &irq, &softirq, &steal)) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Failed to retrieve Linux CPU statistics\n");
+ return -1;
+ }
+
+ if (!p->valid_last_times) {
+ // we dont strictly need to save all of them but I feel code is more clear if we do
+ p->valid_last_times = 1;
+ p->last_user_time = user;
+ p->last_nice_time = nice;
+ p->last_system_time = system;
+ p->last_irq_time = irq;
+ p->last_soft_irq_time = softirq;
+ p->last_io_wait_time = iowait;
+ p->last_steal_time = steal;
+ p->last_idle_time = idle;
+ p->last_percentage_of_idle_time = 100.0;
+ *idle_percentage = p->last_percentage_of_idle_time;
+ return 0;
+ }
+
+ usertime = (user - p->last_user_time) + (nice - p->last_nice_time);
+ kerneltime = (system - p->last_system_time) + (irq - p->last_irq_time) + (softirq - p->last_soft_irq_time);
+ kerneltime += (iowait - p->last_io_wait_time);
+ kerneltime += (steal - p->last_steal_time);
+ idletime = (idle - p->last_idle_time);
+
+ totaltime = usertime + kerneltime + idletime;
+
+ if (totaltime <= 0) {
+ // this may happen if not enough time has elapsed and the jiffies counters are the same than the last time we checked
+ // jiffies depend on timer interrupts which depend on the number of HZ compile time setting of the kernel
+ // typical configs set HZ to 100 (that means, 100 jiffies updates per second, that is one each 10ms)
+ // avoid an arithmetic exception and return the same values
+ *idle_percentage = p->last_percentage_of_idle_time;
+ return 0;
+ }
+
+ halftime = totaltime / 2UL;
+
+ p->last_percentage_of_idle_time = ((100 * idletime + halftime) / totaltime);
+ *idle_percentage = p->last_percentage_of_idle_time;
+
+ p->last_user_time = user;
+ p->last_nice_time = nice;
+ p->last_system_time = system;
+ p->last_irq_time = irq;
+ p->last_soft_irq_time = softirq;
+ p->last_io_wait_time = iowait;
+ p->last_steal_time = steal;
+ p->last_idle_time = idle;
+
+ return 0;
+}
+
+#else
+
+SWITCH_DECLARE(int) switch_get_system_idle_time(switch_profile_timer_t *p, double *idle_percentage)
+{
+ FILETIME idleTime;
+ FILETIME kernelTime;
+ FILETIME userTime;
+
+ if (!::GetSystemTimes(&idleTime, &kernelTime, &userTime)) {
+ return false;
+ }
+
+ __int64 i64UserTime = (__int64)userTime.dwLowDateTime | ((__int64)userTime.dwHighDateTime << 32);
+
+ __int64 i64KernelTime = (__int64)kernelTime.dwLowDateTime | ((__int64)kernelTime.dwHighDateTime << 32);
+
+ __int64 i64IdleTime = (__int64)idleTime.dwLowDateTime | ((__int64)idleTime.dwHighDateTime << 32);
+
+ if (p->valid_last_times) {
+ __int64 i64User = i64UserTime - p->i64LastUserTime;
+ __int64 i64Kernel = i64KernelTime - p->i64LastKernelTime;
+ __int64 i64Idle = i64IdleTime - p->i64LastIdleTime;
+ __int64 i64System = i64User + i64Kernel;
+ *idle_percentage = 100.0 * i64Idle / i64System;
+ } else {
+ *idle_percentage = 100.0;
+ p->valid_last_times = 1;
+ }
+
+ /* Remember current value for the next call */
+ p->i64LastUserTime = i64UserTime;
+ p->i64LastKernelTime = i64KernelTime;
+ p->i64LastIdleTime = i64IdleTime;
+
+ /* Success */
+ return 0;
+}
+
+#endif
+
+SWITCH_DECLARE(switch_profile_timer_t *)switch_new_profile_timer(void)
+{
+ return calloc(1, sizeof(switch_profile_timer_t));
+}
+
+SWITCH_DECLARE(void) switch_delete_profile_timer(switch_profile_timer_t **p)
+{
+ if (!p) return;
+
+#ifdef __linux__
+ close((*p)->procfd);
+#endif
+ free(*p);
+ *p = NULL;
+}
+
+