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C Process Cpu Usage


more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed VmRss is the amount of memory that have been mapped into the process' address space, or its resident set size. It calls wait3/wait4 system call (if available) and otherwise it calls times system call. Adam Smith November 28, 2011 at 6:27 pm Hi Ben, THANKS for the code! Source

Some machines don't have perf counters installed correctly so this is great! Leave a comment. Why leave magical runes exposed? percent = -1.0; } else{ percent = (timeSample.tms_stime - lastSysCPU) + (timeSample.tms_utime - lastUserCPU); percent /= (now - lastCPU); percent /= numProcessors; percent *= 100; } lastCPU = now; lastSysCPU = http://stackoverflow.com/questions/1420426/how-to-calculate-the-cpu-usage-of-a-process-by-pid-in-linux-from-c

Calculate Cpu Usage From /proc/pid/stat

It is important to note that we do NOT take into account the idle time. Find the difference and divide by hundred. Field Content pid process id tcomm filename of the executable state state (R is running, S is sleeping, D is sleeping in an uninterruptible wait, Z is zombie, T is traced

Just skip this value. Browse other questions tagged c linux cpu-usage or ask your own question. Why catch block of base class is catching the exception when I am throwing object of derived class? Getrusage So which one corresponds to which value ?? –codingfreak Sep 14 '09 at 9:32 @codingfreak:CPU time is difficult to calculate.

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Post a reply 14 posts Return to C/C++ Jump to: Select a forum ------------------ Community General discussion Other Glibtop Virtual Memory Currently Used by my Process You can get statistics about your current process using the task_info function. I am trying to get the CPU usage of more than one process at the same time. http://stackoverflow.com/questions/8501706/how-to-get-the-cpu-usage-in-c From this you can calculate the average CPU usage since boot.

Unix & Linux Stack Exchange works best with JavaScript enabled Philosophical Geek Code and musings by Ben Watson Menu Skip to content Home About Me Writing High-Performance .NET Code Software DiskSlicer At the time you check, the CPU will be 100% in use, running your code itself. RAM Currently Used by my Process See the "Virtual Memory Currently Used by my Process" above. Is it a security vulnerability if the addresses of university students are exposed?


Post navigation ← An easy stack layout panel for WinForms How to learn WPF (or anything else) → 39 thoughts on “Determine CPU usage of current process (C++ and C#)” Deekshit http://stackoverflow.com/questions/63166/how-to-determine-cpu-and-memory-consumption-from-inside-a-process Read ctime and utime for a PID at a point in time and read the same values again after 1 sec. Calculate Cpu Usage From /proc/pid/stat Download C++ and C# projects Check out my latest book, the essential, in-depth guide to performance for all .NET developers: Writing High-Performance.NET Code by Ben Watson. Getloadavg physMemUsed *= memInfo.mem_unit; Physical Memory currently used by current process: Change getValue() in "Virtual Memory currently used by current process" as follows: int getValue(){ //Note: this value is in KB!

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed this contact form asked 4 years ago viewed 6631 times active 2 years ago Visit Chat Linked 6 Returning CPU usage in WMI using C# 1 How to find the cpu usage of a This put percents as the same way as top, scalling it to one CPU. or is there a leak? -Deekshit Ben Post authorFebruary 5, 2009 at 12:21 pm Deekshit, the demo program deliberately uses a lot of the processor in order to demo the functionality C++ Get Cpu Usage

share|improve this answer edited Dec 27 '12 at 3:33 answered Dec 26 '12 at 19:39 John Siu 2,66011014 I'm trying to get the total usage from all processes; preferably This is my own personal work only. Why do CDs and DVDs fill up from the centre outwards? http://1pxcare.com/cpu-usage/get-process-cpu-usage-vb6.html share|improve this answer answered Jul 16 '15 at 21:14 Mark Lakata 10.6k35473 add a comment| up vote 2 down vote QNX Since this is like a "wikipage of code" I want

This site is not affiliated with Linus Torvalds or The Open Group in any way. i want a c sorce code to run cpu usage on code blocks. A quick look as the source to 'ps' reveals the mess.

If not, replace PATH_MAX with a number for maximum file path name lenngth, like 999#define _GNU_SOURCE Posts: 191Joined: Fri Apr 12, 2013 9:27 amLocation: Essex, UK by Megaguigui » Fri Jan

Do calculate that, you need to read this file twice, 1 second apart.Then you can do a diff of the fourth value of the line. Then when some process is active working with 2 threads, cpu usage can be more than 100%. So, your program ran exactly? Include this guy #include and call this method int nb = sysconf(_SC_NPROCESSORS_ONLN); –David Guyon Jun 3 '14 at 8:01 add a comment| up vote 4 down vote I wrote two

Are there any rules of thumb for the most comfortable seats on a long distance bus? Not the answer you're looking for? since even applications like top should calculate the CPU usage to show in their output –codingfreak Sep 14 '09 at 10:14 | show 1 more comment up vote 6 down vote Check This Out Is there a reason why similar or the same musical instruments would develop?