PerfOpt patch to boost AMD iGPU performance on Linux

A patch called PerfOpt is slated for Linux kernel 7.4, letting AMD integrated GPUs bypass the IOMMU when directly accessing system memory. The change cuts system overhead and should speed up latency- and throughput-sensitive workloads. The kernel release is expected in late October or early November.

• PerfOpt patch is slated for Linux kernel 7.4
• AMD iGPUs will bypass IOMMU for direct memory access
• IOMMU enforces only IR/IW permission bits without GPA->SPA translation
• Kernel 7.4 release expected in late October or early November