Page Comparison

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Note: Please note that this is draft, we may want to split drivers in a different way e.g. core PMU and uncore PMU as two separate drivers (not three like its stated below). See below draft of ideas and possible solutions to DT architecture. Further chapters should describe architecture we want o actually implement.

• [ON HOLD] Split current wperf-driver into three separate independent drivers (core, DSU and DMC driver).

• Introduce “driver type” for WindowsPerf drivers in DT.

  • “core PMU” driver type to support vanilla Arm PMUs.

  • “uncore PMU” driver(s):

    • Introduce “DSU” driver type to support uncore PMU counting.

    • Introduce “DMC” driver type to support Dynamic Memory Controllers.

• [ON HOLD] Introduce driver “template” for each type.

  • Note: We may want to have one template for “PMU like devices”

• [ON HOLD] Move current wperf-driver core PMU and uncore PMU implementations under new driver types.

• Add DT driver enumeration to user space.

  • Adapt wperf and drivers to communicate with N drivers installed.

  • Adapt wperf-devgen to support new driver types enumeration and installation / removal.

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All below architectural changes are a roadmap (no order in which they should be added).

DMC driver prototype

• https://gitlab.com/Linaro/WindowsPerf/windowsperf/-/tree/feature-WPERF-729?ref_type=heads

  • based on work for

    Jira Legacy
    server System Jira serverId 59107c6f-1e52-32bc-b58f-400d54bba998 key WPERF-729

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Kernel - user-space Interface

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• Implementation details:

  • https://gitlab.com/Linaro/WindowsPerf/windowsperf/-/merge_requests/548 and

  • Jira Legacy
    server System JIRAJira serverId 59107c6f-1e52-32bc-b58f-400d54bba998 key WPERF-728

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