![]() On systems with underlying OS (including some Maintaining actual calendar date/time: This requires a Time Epoch: Unix port uses standard for POSIX systems epoch of Measuring time intervals, and for delays. ![]() ![]() LTopProcess.The utime module provides functions for getting the current time and date, ![]() This is us, strip off the % and return it Integer lCurrentPID = Integer.parseInt(lSplit) On the line that is our process, field 0 is a PID Make sure we can handle if we can't parse the int Don't even bother if we don't have at least the 4 NOTE: We trim because sometimes we had the first field in the split be a "". Split on 4, the CPU % is the 3rd field. While ( (lLine = bufferedReader.readLine()) != null ) While we have stuff to read and we have not found our PID, process the lines Process lTopProcess = Runtime.getRuntime().exec("top") īufferedReader bufferedReader = new BufferedReader(new InputStreamReader(lTopProcess.getInputStream())) Make a call to top so we have all the processes CPU Public static int getAppCPUUsage( Integer aAppPID) top, so there is a fair bit of parsing. This is an alternate way, but it takes the entire output of Logger.e(Constants.TAG, "Unable to get Total CPU usage") Return restrictPercentage(work * 100 / (float) total) Long total = work + Long.parseLong(sa) + Long.parseLong(sa) + Long.parseLong(sa) + Long.parseLong(sa) Long work = Long.parseLong(sa) + Long.parseLong(sa) + Long.parseLong(sa) String sa = reader.readLine().split("+", 9) this version only returns a single line for the app, so far less parsingīufferedReader reader = new BufferedReader(new FileReader("/proc/stat")) Int lM圜PUUsage = getAppCPUUsage( lMyProcessID ) Integer lMyProcessID = android.os.Process.myPid() I did this in Android, and it makes a kernel top call and gets the CPU usage for your apps PID using what top returns. Here is another way that I got my App's CPU usage. Resident and data_and_stack parameters used for getting memory usage and obtained from /proc//statm file. State, ppid, priority, nice, num_threads parameters obtained also from /proc//stat file. Utime, stime, cutime, cstime, starttime used for getting cpu usage and obtained from /proc//stat file. There is two versions simple monochrome(fast) and colored version(little bit slow, but useful especially for monitoring the statе of processes). It is a linux/unix system monitor and process manager through procfs, like " top" or " ps". Here is my simple solution written in BASH. How to get total cpu usage in Linux (c++)Ĭalculating CPU usage of a process in Linux Top and ps not showing the same cpu result Next we get the total elapsed time in seconds since the process started: seconds = uptime - (starttime / Hertz)įinally we calculate the CPU usage percentage: cpu_usage = 100 * ((total_time / Hertz) / seconds) If we do, then we add those values to total_time: total_time = total_time + cutime + cstime We also have to decide whether we want to include the time from children processes.
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