INTEL RAPL DRIVER

Leave a Comment Please sign in to add a comment. User level tools must convert the counts by multiplying them by 0. Thanks to PeterZ for suggesting this approach. It is a kernel module of Linux. Any insights into why I see these strange numbers for Skylake-X would be greatly appreciated. It however displays as if the limits where 17 and 21 W, whereas the same tool doesn’t show consumed power over 10W shows 9 in fact.

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Set power limit to Intel rapl – Unix & Linux Stack Exchange

I couldn’t find any official documentation on this topic maybe I wasn’t looking in the right place. They raol core, dram and uncore. If you want to instrument code the imtel common solution is PAPI. Recent enough Intel processor use the Intel rapl driver for energy management.

Here is some info about the two systems I am reading the measurements on. The method used avoids kernel floating-point and minimizes the loss of precision bits.

Mon, 7 Oct I see you are using kernel v 4. For instance, on a 2-socket system, 2 CPUs one on each socket will be shown. The server skus add a 3rd counter. I have been able to resolve the issue with low energy readings on Skylake-X. There is no rqpl level filtering either.

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Hotplug CPU is also supported. Thank you for the answers.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Read raw Machine Specific Registers. Turns out there was some issue with the BIOS settings. Sign up using Email and Password.

Email Required, but never shown. It does not rely on powercap interface because it has its own. To convert the raw count in Watt: Could it be that I rapll to update the kernel to a newer version to give me correct values for Skylake-X?

The counters all count in the same unit.

By using our site, you acknowledge that imtel have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The second patch adds a hrtimer to poll the counters given that they do no interrupt on overflow. I tried manually turning on an off different settings HT, Speed Step, Speed Shift, Turbo to see whether it has an effect on the readings.

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It supports different ways to collect power consumption, and also RAPL:. But in some cases, you have power plugged in I use a 90W power supply instead of the original 45Wand you have additional cooling capabilities that makes some room for the temperature.

RAPL on Skylake-X

That is while running 8 threads compared to 4 on skylake-S. The improvement in term of frequency is generally around Alexey, I was trying to get the measurements for core power – PP0 preferably or at least package power. Post as a guest Name. Hi Marko, I see you are using kernel v 4. It however displays as if the limits where 17 and 21 W, whereas the same tool doesn’t show consumed power over 10W shows 9 in fact.

Do you kown how to resolve it? In my opinion, the best choice is to use powercap interface.

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