iOS 性能监控（一）—— CPU功耗监控

//! 遍历当前任务内存活的所有线程

    for (int i = 0; i < threadCount; i++) {




        thread_info_data_t threadInfo; // 32位data

        thread_basic_info_t threadBaseInfo;




        mach_msg_type_number_t threadInfoCount = THREAD_INFO_MAX;




        if (thread_info((thread_act_t)threads[i], THREAD_BASIC_INFO, (thread_info_t)threadInfo, &threadInfoCount) == KERN_SUCCESS) {

            threadBaseInfo = (thread_basic_info_t)threadInfo; // 获取线程的信息

            if (!(threadBaseInfo->flags & TH_FLAGS_IDLE)) {

                integer_t cpuUsage = threadBaseInfo->cpu_usage / 10; // CPU最大usage为1000，因此除10即可获得CPU当前的利用率。

                if (cpuUsage > CPUMONITORRATE) { // 超过设定的阈值时，记录堆栈

                    //cup 消耗大于设置值时打印和记录堆栈

                    NSString *reStr = qiStackOfThread(threads[i]);

                    QiCallStackModel *model = [[QiCallStackModel alloc] init];

                    model.stackStr = reStr;

                    //记录数据库中

                    [[[QiLagDB shareInstance] increaseWithStackModel:model] subscribeNext:^(id x) {}];

                    NSLog(@"CPU useage overload thread stack：\n%@",reStr);

                }

            }

        }

    }