# ru\_utime and ru\_stime

**URL:** <https://mediasoup.discourse.group/t/ru-utime-and-ru-stime/6039>\
**Category:** Deployment & Scalability\
**Created:** [May 11, 2024, 5:32am UTC](https://mediasoup.discourse.group/t/ru-utime-and-ru-stime/6039 "2024-05-11T05:32:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![S03XY](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/s03xy/32/2495_2.png) [@S03XY](https://mediasoup.discourse.group/u/S03XY)\
**Post date:** [May 11, 2024, 5:32am UTC](https://mediasoup.discourse.group/t/ru-utime-and-ru-stime/6039/1 "2024-05-11T05:32:20Z")

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I want to know whether `ru_utime` and `ru_stime` in the `getWorkerUsage` function are measured in what unit. From my Google search, it says they are measured in microseconds, whereas in some of the mediasoup examples, they have taken it as milliseconds. Which unit is correct?

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**Author:** ![BronzedBroth](https://avatars.discourse-cdn.com/v4/letter/b/ad7895/32.png) [@BronzedBroth](https://mediasoup.discourse.group/u/BronzedBroth)\
**Post date:** [May 11, 2024, 8:51pm UTC](https://mediasoup.discourse.group/t/ru-utime-and-ru-stime/6039/2 "2024-05-11T20:51:15Z")

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Any unit can be correct if provided data is accurate.

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**Author:** ![S03XY](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/s03xy/32/2495_2.png) [@S03XY](https://mediasoup.discourse.group/u/S03XY)\
**Post date:** [May 13, 2024, 9:28am UTC](https://mediasoup.discourse.group/t/ru-utime-and-ru-stime/6039/3 "2024-05-13T09:28:31Z")

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How would I calculate the percentage usage if I am not using the correct unit? And yeah, I know there are other Node.js libraries to calculate the CPU % usage, but I want to learn the native way.

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**Author:** ![havfo](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/havfo/32/268_2.png) [@havfo](https://mediasoup.discourse.group/u/havfo)\
**Post date:** [May 13, 2024, 11:17am UTC](https://mediasoup.discourse.group/t/ru-utime-and-ru-stime/6039/4 "2024-05-13T11:17:22Z")

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> **[mediasoup :: API](https://mediasoup.org/documentation/v3/mediasoup/api/#WorkerResourceUsage)**
>
> Cutting Edge WebRTC Video Conferencing

> Both `ru_utime` and `ru_stime` values are given in milliseconds.