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Kernel: Noise, Hardware, and Storage

Submitted by Roy Schestowitz on Monday 5th of July 2021 02:35:43 PM Filed under
Linux
  • New Linux 5.14 Tracer To Help With Measuring Operating System Noise - Phoronix

    The tracing subsystem within the Linux kernel is seeing some exciting improvements with Linux 5.14 to help with low-latency analysis and also measuring operating system noise.

    Linux 5.14 brings a new "osnoise" tracer for measuring noise attributed to the operating system and hardware when it comes to isolated applications. The OSNoise tracer keeps track of noise by monitoring entry points for NMIs / IRQs / SoftIRQs / threads in determining if the noise is coming from the OS or rather than hardware. There are also tracepoints setup for helping to further debug sources of noise.

  • Linux 5.14's Perf Tooling Makes Preparations For Intel Alder Lake - Phoronix

    The Linux kernel's tooling around the perf subsystem is the latest area seeing a lot of work for Intel's upcoming Alder Lake processors with a mix of high performance and low power processor cores.

    The perf tooling updates for this new kernel cycle bring various hybrid processor handling improvements in working towards Intel's Alder Lake processors. This includes new perf.data file header additions around hybrid topology as well as supporting PMU prefixes for hybrid CPUs, among other changes for Alder Lake and future Intel hybrid processors.

  • Linux 5.14 Works Around Compatibility With Some Digital Camera exFAT File-Systems - Phoronix

    Merged back in Linux 5.4 in late 2019 was the exFAT file-system driver that has proven to be quite mature at this stage with the work led by Samsung under the blessing of Microsoft. There hasn't been much in the way of exFAT file-system driver changes in recent kernel releases given its maturity. Even with Linux 5.14 there are just two exFAT patches but end up being notable at least for some users due to fixing file-system compatibility with some digital cameras.

    Linux 5.14's exFAT brings improved compatibility with the exFAT file-systems from some digital cameras. In particular, when mounting an exFAT file-system from select digital cameras under Linux, in some cases not all of the files would show up under Linux.

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