https://wccftech.com/intel-arc-alchemist-gpus-improved-power-management-linux/

Intel, AMD, and NVIDIA have been hard at work to make sure any new technology released now and in the future will be fully compatible with the upcoming Linux 5.19 kernel. Intel's open-source team has recently added a new update to the kernel for DG2/Arc Alchemist dGPU support and is looking to be in better standards than previously from Team Blue. The update created includes the addition of current IDs and support for compute tasks, allowing the latest kernel to offer enhanced power management handling for the Arc Alchemist family of graphics.

Integrating into the Linux PCIe subsystem seems abnormal. Intel promotes the Arc Alchemist dGPU with a decent L1 exit latency, equalling less than a microsecond, and can handle exit latencies far beyond the threshold given. The initial batch of the iGPU family from Intel can become enabled as "unlimited," allowing the PCIe Active State Power Management, or ASPM, L1 power savings to find use in many configurations. In turn, users would be able to expect fewer than 1us power exits when continuing PCIe processes.