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

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

File Facts

System
Linux kernel
Corpus path
tools/perf/pmu-events/arch/x86/snowridgex/frontend.json
Extension
.json
Size
4171 bytes
Lines
79
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",
        "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"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to a conditional jump.",
        "Counter": "0,1,2,3",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.COND",
        "SampleAfterValue": "200003",
        "UMask": "0x10"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to an indirect branch.",
        "Counter": "0,1,2,3",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.INDIRECT",
        "SampleAfterValue": "200003",
        "UMask": "0x2"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to a return branch.",
        "Counter": "0,1,2,3",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.RETURN",
        "SampleAfterValue": "200003",
        "UMask": "0x8"
    },
    {
        "BriefDescription": "Counts the number of BACLEARS due to a direct, unconditional jump.",
        "Counter": "0,1,2,3",
        "EventCode": "0xe6",
        "EventName": "BACLEARS.UNCOND",
        "SampleAfterValue": "200003",
        "UMask": "0x4"
    },
    {
        "BriefDescription": "Counts the number of times a decode restriction reduces the decode throughput due to wrong instruction length prediction.",
        "Counter": "0,1,2,3",
        "EventCode": "0xe9",
        "EventName": "DECODE_RESTRICTION.PREDECODE_WRONG",
        "SampleAfterValue": "200003",
        "UMask": "0x1"
    },
    {
        "BriefDescription": "Counts the number of requests to the instruction cache for one or more bytes of a cache line.",
        "Counter": "0,1,2,3",
        "EventCode": "0x80",
        "EventName": "ICACHE.ACCESSES",
        "PublicDescription": "Counts the total number of requests to the instruction cache.  The event only counts new cache line accesses, so that multiple back to back fetches to the exact same cache line or byte chunk count as one.  Specifically, the event counts when accesses from sequential code crosses the cache line boundary, or when a branch target is moved to a new line or to a non-sequential byte chunk of the same line.",
        "SampleAfterValue": "200003",
        "UMask": "0x3"
    },
    {
        "BriefDescription": "Counts the number of instruction cache hits.",
        "Counter": "0,1,2,3",
        "EventCode": "0x80",
        "EventName": "ICACHE.HIT",
        "PublicDescription": "Counts the number of requests that hit in the instruction cache.  The event only counts new cache line accesses, so that multiple back to back fetches to the exact same cache line and byte chunk count as one.  Specifically, the event counts when accesses from sequential code crosses the cache line boundary, or when a branch target is moved to a new line or to a non-sequential byte chunk of the same line.",
        "SampleAfterValue": "200003",
        "UMask": "0x1"
    },
    {
        "BriefDescription": "Counts the number of instruction cache misses.",

Annotation

Implementation Notes