tools/perf/pmu-events/arch/x86/arrowlake/frontend.json

Source file repositories/reference/linux-study-clean/tools/perf/pmu-events/arch/x86/arrowlake/frontend.json

File Facts

System
Linux kernel
Corpus path
tools/perf/pmu-events/arch/x86/arrowlake/frontend.json
Extension
.json
Size
40888 bytes
Lines
836
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.

Dependency Surface

Detected Declarations

Annotated Snippet

[
    {
        "BriefDescription": "Counts the total number of BACLEARS due to all branch types including conditional and unconditional jumps, returns, and indirect branches.",
        "Counter": "0,1,2,3,4,5,6,7",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.ANY",
        "PublicDescription": "Counts the total number of BACLEARS, which occur when the Branch Target Buffer (BTB) prediction or lack thereof, was corrected by a later branch predictor in the frontend.  Includes BACLEARS due to all branch types including conditional and unconditional jumps, returns, and indirect branches.",
        "SampleAfterValue": "200003",
        "UMask": "0x1",
        "Unit": "cpu_atom"
    },
    {
        "BriefDescription": "Clears due to Unknown Branches.",
        "Counter": "0,1,2,3,4,5,6,7,8,9",
        "EventCode": "0x60",
        "EventName": "BACLEARS.ANY",
        "PublicDescription": "Number of times the front-end is resteered when it finds a branch instruction in a fetch line. This is called Unknown Branch which occurs for the first time a branch instruction is fetched or when the branch is not tracked by the BPU (Branch Prediction Unit) anymore.",
        "SampleAfterValue": "100003",
        "UMask": "0x1",
        "Unit": "cpu_core"
    },
    {
        "BriefDescription": "Counts the total number of BACLEARS due to all branch types including conditional and unconditional jumps, returns, and indirect branches.",
        "Counter": "0,1,2,3,4,5,6,7",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.ANY",
        "PublicDescription": "Counts the total number of BACLEARS, which occur when the Branch Target Buffer (BTB) prediction or lack thereof, was corrected by a later branch predictor in the frontend.  Includes BACLEARS due to all branch types including conditional and unconditional jumps, returns, and indirect branches.",
        "SampleAfterValue": "200003",
        "UMask": "0x1",
        "Unit": "cpu_lowpower"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to a conditional jump.",
        "Counter": "0,1,2,3,4,5,6,7",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.COND",
        "SampleAfterValue": "200003",
        "UMask": "0x10",
        "Unit": "cpu_atom"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to an indirect branch.",
        "Counter": "0,1,2,3,4,5,6,7",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.INDIRECT",
        "SampleAfterValue": "200003",
        "UMask": "0x2",
        "Unit": "cpu_atom"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to a return branch.",
        "Counter": "0,1,2,3,4,5,6,7",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.RETURN",
        "SampleAfterValue": "200003",
        "UMask": "0x8",
        "Unit": "cpu_atom"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to a direct, unconditional jump.",
        "Counter": "0,1,2,3,4,5,6,7",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.UNCOND",
        "SampleAfterValue": "200003",
        "UMask": "0x4",
        "Unit": "cpu_atom"
    },
    {
        "BriefDescription": "Stalls caused by changing prefix length of the instruction.",
        "Counter": "0,1,2,3,4,5,6,7,8,9",

Annotation

Implementation Notes