Does your machine have multiple CPUs?<br><br>Regards,<br>Neha<br><br><div class="gmail_quote">On Mon, May 20, 2013 at 4:05 AM, Rahul Bedarkar <span dir="ltr"><<a href="mailto:rpal143@gmail.com" target="_blank">rpal143@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div><br></div><div>I am trying to write small program to get CPU usage for a particular process. My logic is to read user, nice, system, idle values from /proc/stat. Then read user and system time from /proc/<pid>/stat. Then wait for some time and again read same values. After that I am doing following calculations </div>
<div>CPU% = (no_of_processor * (process_cpu_usage2-process_cpu_usage1) * 100 ) / (total_cpu_usage2-total_cpu_usage1)</div><div><br></div><div>When I compare my output with top, it looks like correct, but sometimes it is more than 100. Is my logic correct here ? Please correct me if I am worng.</div>
<div><br></div><div>Regards,</div><div>Rahul </div></div>
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