The Linux Kernel Preparing To Take Advantage Of The Intel DSA / ENQCMD In Sapphire Rapids

[phoronix]

Phoronix: The Linux Kernel Preparing To Take Advantage Of The Intel DSA / ENQCMD In Sapphire Rapids

Expected with next year's Intel Sapphire Rapids Xeon CPUs is the Intel DSA as the Data Streaming Accelerator for high performance data movement and transformation operations. Since the end of 2019 there have been Linux patches surfacing for bringing up the DSA support and now as we roll into 2021 the Linux kernel looks to begin making use of the new capabilities...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-Make-Use-Of-ENQCMD

[chuckula]

This is an important change to make the on package HBM more of a help than a hindrance. It has great bandwidth but the latency and access patterns are different than DRAM and you need to account for that.