iPhone-iOS-从应用程序获取CPU使用率

有谁知道如何获取应用程序的CPU使用率？ 绝对有可能，因为应用商店中有一些可以显示它的应用程序(活动监视器触摸)。

3个解决方案

74 votes

更新。 这段代码为我工作：

更新2。thread_list泄漏，因此添加了vm_deallocate

#import

#import

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 < (int)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->user_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

kr = vm_deallocate(mach_task_self(), (vm_offset_t)thread_list, thread_count * sizeof(thread_t));

assert(kr == KERN_SUCCESS);

return tot_cpu;

}

ivanzoid answered 2020-07-09T18:06:54Z

8 votes

对于Swift 3：

fileprivate func cpuUsage() -> Double {

var kr: kern_return_t

var task_info_count: mach_msg_type_number_t

task_info_count = mach_msg_type_number_t(TASK_INFO_MAX)

var tinfo = [integer_t](repeating: 0, count: Int(task_info_count))

kr = task_info(mach_task_self_, task_flavor_t(TASK_BASIC_INFO), &tinfo, &task_info_count)

if kr != KERN_SUCCESS {

return -1

}

var thread_list: thread_act_array_t? = UnsafeMutablePointer(mutating: [thread_act_t]())

var thread_count: mach_msg_type_number_t = 0

defer {

if let thread_list = thread_list {

vm_deallocate(mach_task_self_, vm_address_t(UnsafePointer(thread_list).pointee), vm_size_t(thread_count))

}

}

kr = task_threads(mach_task_self_, &thread_list, &thread_count)

if kr != KERN_SUCCESS {

return -1

}

var tot_cpu: Double = 0

if let thread_list = thread_list {

for j in 0 ..< Int(thread_count) {

var thread_info_count = mach_msg_type_number_t(THREAD_INFO_MAX)

var thinfo = [integer_t](repeating: 0, count: Int(thread_info_count))

kr = thread_info(thread_list[j], thread_flavor_t(THREAD_BASIC_INFO),

&thinfo, &thread_info_count)

if kr != KERN_SUCCESS {

return -1

}

let threadBasicInfo = convertThreadInfoToThreadBasicInfo(thinfo)

if threadBasicInfo.flags != TH_FLAGS_IDLE {

tot_cpu += (Double(threadBasicInfo.cpu_usage) / Double(TH_USAGE_SCALE)) * 100.0

}

} // for each thread

}

return tot_cpu

}

fileprivate func convertThreadInfoToThreadBasicInfo(_ threadInfo: [integer_t]) -> thread_basic_info {

var result = thread_basic_info()

result.user_time = time_value_t(seconds: threadInfo[0], microseconds: threadInfo[1])

result.system_time = time_value_t(seconds: threadInfo[2], microseconds: threadInfo[3])

result.cpu_usage = threadInfo[4]

result.policy = threadInfo[5]

result.run_state = threadInfo[6]

result.flags = threadInfo[7]

result.suspend_count = threadInfo[8]

result.sleep_time = threadInfo[9]

return result

}

Lionking answered 2020-07-09T18:07:14Z

0 votes

试试这个：

- (NSString *)cpuUsage

{

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 @"NA";

}

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 @"NA";

}

if (thread_count > 0)

stat_thread += thread_count;

long tot_idle = 0;

long tot_user = 0;

long tot_kernel = 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 nil;

}

basic_info_th = (thread_basic_info_t)thinfo;

if (basic_info_th->flags & TH_FLAGS_IDLE)

{

//This is idle

tot_idle = tot_idle + basic_info_th->user_time.microseconds + basic_info_th->system_time.microseconds;

} else {

//This is user

tot_user = tot_user + basic_info_th->user_time.microseconds;

//This is kernel

tot_kernel = tot_kernel + basic_info_th->system_time.microseconds;

}

} // for each thread

kr = vm_deallocate(mach_task_self(), (vm_offset_t)thread_list, thread_count * sizeof(thread_t));

assert(kr == KERN_SUCCESS);

long tot_cpu = tot_idle + tot_user + tot_kernel

return [NSString stringWithFormat:@"Idle: %.2f, User: %.2f, Kernel: %.2f", tot_idle/tot_cpu, tot_user/tot_cpu, tot_kernel/tot_cpu];

}

但是，该方法会根据每个过程的起点来计算百分比。 如果您正在寻找更传统的方式来计算这些数字，请参见Petesh的答案。

Coder256 answered 2020-07-09T18:07:39Z