tools/perf/pmu-events/arch/x86/graniterapids/uncore-interconnect.json

Source file repositories/reference/linux-study-clean/tools/perf/pmu-events/arch/x86/graniterapids/uncore-interconnect.json

File Facts

System: Linux kernel
Corpus path: tools/perf/pmu-events/arch/x86/graniterapids/uncore-interconnect.json
Extension: .json
Size: 65011 bytes
Lines: 1980
Domain: Support Tooling And Documentation
Bucket: tools
Inferred role: Support Tooling And Documentation: configuration, schema, or hardware description
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Touches IRQ or DMA behavior; this matters for the representative real-device path.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

[
    {
        "BriefDescription": "Clockticks of the mesh to memory (B2CMI)",
        "Counter": "0,1,2,3",
        "EventCode": "0x01",
        "EventName": "UNC_B2CMI_CLOCKTICKS",
        "PerPkg": "1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Counts the number of time D2C was not honoured by egress due to directory state constraints",
        "Counter": "0,1,2,3",
        "EventCode": "0x17",
        "EventName": "UNC_B2CMI_DIRECT2CORE_NOT_TAKEN_DIRSTATE",
        "PerPkg": "1",
        "UMask": "0x1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Counts the number of times B2CMI egress did D2C (direct to core)",
        "Counter": "0,1,2,3",
        "EventCode": "0x16",
        "EventName": "UNC_B2CMI_DIRECT2CORE_TAKEN",
        "PerPkg": "1",
        "UMask": "0x1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Counts the number of times D2C wasn't honoured even though the incoming request had d2c set for non cisgress txn",
        "Counter": "0,1,2,3",
        "EventCode": "0x18",
        "EventName": "UNC_B2CMI_DIRECT2CORE_TXN_OVERRIDE",
        "PerPkg": "1",
        "UMask": "0x1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Counts the number of d2k wasn't done due to credit constraints",
        "Counter": "0,1,2,3",
        "EventCode": "0x1B",
        "EventName": "UNC_B2CMI_DIRECT2UPI_NOT_TAKEN_CREDITS",
        "PerPkg": "1",
        "UMask": "0x1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Direct to UPI Transactions - Ignored due to lack of credits : All : Counts the number of d2k wasn't done due to credit constraints",
        "Counter": "0,1,2,3",
        "EventCode": "0x1B",
        "EventName": "UNC_B2CMI_DIRECT2UPI_NOT_TAKEN_CREDITS.EGRESS",
        "PerPkg": "1",
        "UMask": "0x1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Counts the number of time D2K was not honoured by egress due to directory state constraints",
        "Counter": "0,1,2,3",
        "EventCode": "0x1A",
        "EventName": "UNC_B2CMI_DIRECT2UPI_NOT_TAKEN_DIRSTATE",
        "PerPkg": "1",
        "UMask": "0x1",
        "Unit": "B2CMI"
    },
    {
        "BriefDescription": "Cycles when Direct2UPI was Disabled : Egress Ignored D2U : Counts the number of time D2K was not honoured by egress due to directory state constraints",
        "Counter": "0,1,2,3",
        "EventCode": "0x1A",
        "EventName": "UNC_B2CMI_DIRECT2UPI_NOT_TAKEN_DIRSTATE.EGRESS",
        "PerPkg": "1",
        "UMask": "0x1",

Annotation

Atlas domain: Support Tooling And Documentation / tools.
Implementation status: atlas-only.
IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.