FastTech, January 29th - Recently, Francisco Jerez, an Intel open-source graphics driver engineer, submitted a set of 18 patches, which have been merged into Mesa 26.1.
These patches were initially intended to fix screen corruption issues with the Intel Alchemist discrete GPU and Meteor Lake integrated GPU under Linux, but they unexpectedly brought a performance boost of up to 260% for specific graphic loads.
Jerez reported: "After switching to partial resolves, this series of patches significantly improved the performance of workloads that frequently sample from non-WT depth surfaces. On Gfx12.5 components, the tracking test performance of NBA 2K23 increased by 260%."
The core of this performance surge lies in the reconstruction of the HiZ-CCS processing mechanism. Previously, the Mesa driver often needed to parse the entire depth buffer when handling sampling requests, while the new patches introduced the "partial resolves" technology.
This means the system now only parses specific areas required by the workload, greatly reducing memory bandwidth usage while maintaining the activity of HiZ and CCS.
This performance improvement is most noticeable in graphic workloads involving frequent sampling of MSAA surfaces. However, since only one game instance has been analyzed, it remains unclear how these patches perform in other games or graphic workloads.
However, it should be noted that these improvements are only applicable to Linux systems, and Windows users cannot currently benefit from these performance enhancements.
Original: toutiao.com/article/7600671045204361780/
Statement: This article represents the views of the author himself.