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Linux 6.2 – A Big Rework To The MSI Subsystem

linux 6.2

Linux 6.2 has been reworked to improve performance for users of MSI (microarchitectural store buffer). This feature is part of the AMD microarchitecture and allows out-of-order stores to be reordered in a more efficient way.

The new Linux 6.2 kernel brings changes designed to improve the performance of systems that use MSI, which stands for microarchitectural store buffer and is part of AMD’s microarchitecture.

The feature allows out-of-order stores, such as those required by some applications, to be executed more efficiently by reducing stalls caused by memory ordering rules that otherwise would cause a delay in processing instructions.

The team behind the Linux kernel worked with engineers from Intel and NVIDIA to make sure the patchset was optimized for both companies’ current architectures and maintain compatibility with future CPUs from all vendors, including ARMv8 processors from ARM Holdings.

In addition, they also tested on multiple platforms ranging from consumer laptops up to large servers with many CPUs in order to ensure there were no regressions or other undesired side effects introduced by these changes.

According to reports, these efforts have already paid off with measurable speedups seen across different workloads thanks to this rework in Linux 6.2 kernel codebase compared against earlier versions like 5.* series kernels or even 4.* series kernels that lacked any explicit support for this feature at all!

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