Intel Celeron N2820: ACPI CPUfreq vs. P-State Scaling
Written by Michael Larabel in Intel on 3 June 2014 at 03:00 AM EDT. 5 Comments
To complement the recent ACPI CPUfreq vs. Intel P-State Scaling With Linux 3.15 testing that was done using an Intel Core i7 Ivy Bridge Extreme Edition system, here's some similar tests done using a low-power Intel Celeron N2820 "Bay Trail" SoC within the Intel NUC.

For reference purposes from the Intel N2820 NUC when using the Linux 3.15 kernel loaded on Ubuntu 14.04 LTS 64-bit, I compared the performance of the ACPI CPUfreq and Intel P-State CPU frequency scaling drivers. With the P-State driver I tested only with the performance governor as the powersave governor locked up the system. With ACPI CPUfreq I tested the Celeron N2820 with the powersave, performance, conservative, and ondemand scaling governors.


Read the earlier Phoronix article for more background information on this testing along with some power consumption comparison numbers, etc. To see the results, all of the system information and benchmark results in full via the Phoronix Test Suite are hosted on OpenBenchmarking.org via 1405297-KH-INTELNUC248.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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