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MonitorIOS.m
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MonitorIOS.m
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//
// MonitorIOS.m
// AFNetworking iOS Example
//
// Created by Tian on 13/02/12.
// Copyright (c) 2012 Gowalla. All rights reserved.
//
#import "MonitorIOS.h"
#import <sys/sysctl.h>
#import <mach/mach.h>
float cpu_usage()
{
kern_return_t kr;
task_info_data_t tinfo;
mach_msg_type_number_t task_info_count;
task_info_count = TASK_INFO_MAX;
kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)tinfo, &task_info_count);
if (kr != KERN_SUCCESS) {
return -1;
}
task_basic_info_t basic_info;
thread_array_t thread_list;
mach_msg_type_number_t thread_count;
thread_info_data_t thinfo;
mach_msg_type_number_t thread_info_count;
thread_basic_info_t basic_info_th;
uint32_t stat_thread = 0; // Mach threads
basic_info = (task_basic_info_t)tinfo;
// get threads in the task
kr = task_threads(mach_task_self(), &thread_list, &thread_count);
if (kr != KERN_SUCCESS) {
return -1;
}
if (thread_count > 0)
stat_thread += thread_count;
long tot_sec = 0;
long tot_usec = 0;
float tot_cpu = 0;
int j;
for (j = 0; j < thread_count; j++)
{
thread_info_count = THREAD_INFO_MAX;
kr = thread_info(thread_list[j], THREAD_BASIC_INFO,
(thread_info_t)thinfo, &thread_info_count);
if (kr != KERN_SUCCESS) {
return -1;
}
basic_info_th = (thread_basic_info_t)thinfo;
if (!(basic_info_th->flags & TH_FLAGS_IDLE)) {
tot_sec = tot_sec + basic_info_th->user_time.seconds + basic_info_th->system_time.seconds;
tot_usec = tot_usec + basic_info_th->system_time.microseconds + basic_info_th->system_time.microseconds;
tot_cpu = tot_cpu + basic_info_th->cpu_usage / (float)TH_USAGE_SCALE * 100.0;
}
} // for each thread
return tot_cpu;
}
@implementation MonitorIOS
-(void)systemStats {
struct tcpstat tcpstat;
size_t len = sizeof tcpstat;
size_t rtSent = 0;
size_t rtRecev = 0;
if (sysctlbyname("net.inet.tcp.stats", &tcpstat, &len, 0, 0) < 0) {
perror("sysctlbyname");
} else {
rtSent = tcpstat.tcps_sndbyte - oldSentBytes;
rtRecev = tcpstat.tcps_rcvbyte - oldRecvBytes;
NSLog(@"System monitoring");
printf("CPU Usage: %f \n", cpu_usage());
printf("Tx: %lu bytes\n", rtSent);
printf("Rx: %lu bytes\n", rtRecev);
printf("----------------------\n");
oldSentBytes = tcpstat.tcps_sndbyte;
oldRecvBytes = tcpstat.tcps_rcvbyte;
}
}
@end