Re: Confusion about metricConvert() value for kernel.all.cpu.user

[Rohan Arora <rarora2012@xxxxxxxxx>]

If I simply do a metricConvert() for kernel.all.cpu.user and then divide the value by 10, I end up with values that are ~30% higher than what top shows me, or it shows 0% when top does not. However, I do get values that are quite close by doing the following:

    float(user) / (user + nice + sys + idle + intr + steal + guest + vuser + total + soft + hard) * 100

Do you know why there might such a difference in the values using the method that you described and top? Also, is the method I mentioned above a valid way to measure the user cpu usage?

Thanks,

Rohan

On Fri, Aug 7, 2015 at 9:06 AM Frank Ch. Eigler <fche@xxxxxxxxxx> wrote:

rarora2012 wrote:

> [...]Â From the above portion of an e-mail, I was under the
> impression that the rate-converted value would come out as a decimal
> directly corresponding to the percentage from a reply from a former
> thread.Â

Rate conversion will take it from a sequence of counter values
(milliseconds) to a rate (milliseconds per second). 1000 of those
would mean 100%, so you need to divide by 10.

- FChE