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⇱ Intel PEPC 1.6 Released For Tuning Efficiency Latency Control "ELC" With Xeon 6 CPUs - Phoronix


👁 Phoronix

Intel PEPC 1.6 Released For Tuning Efficiency Latency Control "ELC" With Xeon 6 CPUs

Written by Michael Larabel in Intel on 7 September 2025 at 05:44 AM EDT. Add A Comment
Intel's open-source PEPC tool has been updated as the utility for managing and optimized Intel CPU power management features on Linux.

PEPC is short for the Power, Energy, and Performance Configurator and this week's PEPC v1.6 release brings support for Efficiency Latency Control handling found with current generation Xeon 6 Granite Rapids and Sierra Forest server processors.

👁 Intel Xeon 6 server


Efficiency Latency Control is the uncore feature that allows configuring the server for a trade-off between power efficiency / performance / latency. Running in the ELC mode can enhance the performance-per-Watt of the server processors and the option is typically managed from the system BIOS. There are some sysfs control knobs for ELC tuning with the Intel ELC Linux code while now the PEPC configurator offers up some nice integration for server administrators to tune the ELC thresholds.

👁 pepc uncore command


As part of the ELC integration and other changes in PEPC 1.6, there is now a pepc uncore command to make some of the dealings with this power management configurator more convenient.

Downloads and more details on the Intel PEPC 1.6 configurator for power management tuning on Linux systems via GitHub.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.