#cpu_usage

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How to Fix High Disk Usage by Modern Setup Host on Windows 10

Is Modern Setup Host consuming high CPU usage on Windows 10? Know how to fix high disk usage by Modern Setup Host issue in no time.

Is Modern Setup Host consuming high CPU usage on Windows 10? Know how to fix high disk usage by Modern Setup Host issue in no time          

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Get cpu usage in iOS

To obtain the cpu usage in Objective-C you must call a C function.

Fortunately, Objective-C gets full support for C and C++ so you can write a C function named cpu_usage and use it writing cpu_usage().

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; basic_info = (task_basic_info_t)tinfo; 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; } } kr = vm_deallocate(mach_task_self(), (vm_offset_t)thread_list, thread_count * sizeof(thread_t)); assert(kr == KERN_SUCCESS); return tot_cpu; }

The cpu_usage function returns the cpu usage like a float number.

Well, if you want to schedule the cpu_usage C function to monitoring the cpu, you can use a NSTimer that calls a Objective-C method that calls the C function.

Basically, create a Objective-C method like below

-(void)cpu_usage //it is a Objective-C method { float averageCpuUsage = cpu_usage(); //it calls the cpu_usage() C function NSLog(@"CPU usage is %f", averageCpuUsage); }

and use a NSTimer (named cpuMonitor, it's a private variable define in the interface class) to schedule it

cpuMonitor = [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(cpu_usage) userInfo:nil repeats:YES]; //it calls the cpu_usage Objective-C method

That's all.