linux-kernel - Re: [PATCH v2 1/3] perf vendor events: Add cache refill and DCZVA events

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Date:   Thu, 21 Jan 2021 19:39:20 +0800
From:   Shaokun Zhang <zhangshaokun@...ilicon.com>
To:     Shunsuke Nakamura <nakamura.shun@...fujitsu.com>,
        <john.garry@...wei.com>
CC:     <mathieu.poirier@...aro.org>, <linux-kernel@...r.kernel.org>,
        <leo.yan@...aro.org>, <will@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/3] perf vendor events: Add cache refill and DCZVA
 events

Hi,

在 2021/1/21 18:54, Shunsuke Nakamura 写道:
> Adds L1 data cache refill prefetch, L2 data cache refill prefetch, 
> and DCZVA instruction events.

A silly question, Does Arm define these events? I checked Arm ARM
document(DDI0487Fc) that these event numbers are reserved. Or maybe
I miss something.

Thanks,
Shaokun

> 
> Signed-off-by: Shunsuke Nakamura <nakamura.shun@...fujitsu.com>
> ---
>  .../perf/pmu-events/arch/arm64/armv8-recommended.json  | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/tools/perf/pmu-events/arch/arm64/armv8-recommended.json b/tools/perf/pmu-events/arch/arm64/armv8-recommended.json
> index d0a1986..ee0e67d 100644
> --- a/tools/perf/pmu-events/arch/arm64/armv8-recommended.json
> +++ b/tools/perf/pmu-events/arch/arm64/armv8-recommended.json
> @@ -54,6 +54,12 @@
>          "BriefDescription": "L1D cache invalidate"
>      },
>      {
> +        "PublicDescription": "This event counts L1D_CACHE_REFILL caused by software or hardware prefetch.",
> +        "EventCode": "0x49",
> +        "EventName": "L1D_CACHE_REFILL_PRF",
> +        "BriefDescription": "This event counts L1D_CACHE_REFILL caused by software or hardware prefetch."
> +    },
> +    {
>          "PublicDescription": "Attributable Level 1 data TLB refill, read",
>          "EventCode": "0x4C",
>          "EventName": "L1D_TLB_REFILL_RD",
> @@ -120,6 +126,12 @@
>          "BriefDescription": "L2D cache invalidate"
>      },
>      {
> +        "PublicDescription": "This event counts L2D_CACHE_REFILL caused by software or hardware prefetch.",
> +        "EventCode": "0x59",
> +        "EventName": "L2D_CACHE_REFILL_PRF",
> +        "BriefDescription": "This event counts L2D_CACHE_REFILL caused by software or hardware prefetch."
> +    },
> +    {
>          "PublicDescription": "Attributable Level 2 data or unified TLB refill, read",
>          "EventCode": "0x5c",
>          "EventName": "L2D_TLB_REFILL_RD",
> @@ -408,6 +420,12 @@
>          "BriefDescription": "Release consistency operation speculatively executed, Store-Release"
>     },
>     {
> +         "PublicDescription": "This event counts architecturally executed zero blocking operations due to the 'DC ZVA' instruction.",
> +         "EventCode": "0x9f",
> +         "EventName": "DCZVA_SPEC",
> +         "BriefDescription": "This event counts architecturally executed zero blocking operations due to the 'DC ZVA' instruction."
> +   },
> +   {
>          "PublicDescription": "Attributable Level 3 data or unified cache access, read",
>          "EventCode": "0xa0",
>          "EventName": "L3D_CACHE_RD",
>