linux-kernel - Re: [PATCH 2/3] soc: sifive: Add SiFive private L2 cache PMU driver

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Message-ID: <20230616-revision-speed-a83dc926b334@wendy>
Date:   Fri, 16 Jun 2023 11:12:57 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Eric Lin <eric.lin@...ive.com>
CC:     <conor@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <palmer@...belt.com>,
        <paul.walmsley@...ive.com>, <aou@...s.berkeley.edu>,
        <maz@...nel.org>, <chenhuacai@...nel.org>,
        <baolu.lu@...ux.intel.com>, <will@...nel.org>,
        <kan.liang@...ux.intel.com>, <nnac123@...ux.ibm.com>,
        <pierre.gondois@....com>, <huangguangbin2@...wei.com>,
        <jgross@...e.com>, <chao.gao@...el.com>, <maobibo@...ngson.cn>,
        <linux-riscv@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <dslin1010@...il.com>,
        Greentime Hu <greentime.hu@...ive.com>,
        Zong Li <zong.li@...ive.com>, Nick Hu <nick.hu@...ive.com>
Subject: Re: [PATCH 2/3] soc: sifive: Add SiFive private L2 cache PMU driver

On Fri, Jun 16, 2023 at 02:32:09PM +0800, Eric Lin wrote:
> From: Greentime Hu <greentime.hu@...ive.com>
> 
> This adds SiFive private L2 cache PMU driver. User
> can use perf tool to profile by event name and event id.
> 
> Example:
> $ perf stat -C 0 -e /sifive_pl2_pmu/inner_acquire_block_btot/
>                 -e /sifive_pl2_pmu/inner_acquire_block_ntob/
>                 -e /sifive_pl2_pmu/inner_acquire_block_ntot/ ls
> 
>  Performance counter stats for 'CPU(s) 0':
> 
>                300      sifive_pl2_pmu/inner_acquire_block_btot/
>              17801      sifive_pl2_pmu/inner_acquire_block_ntob/
>               5253      sifive_pl2_pmu/inner_acquire_block_ntot/
> 
>        0.088917326 seconds time elapsed
> 
> $ perf stat -C 0 -e /sifive_pl2_pmu/event=0x10001/
>                 -e /sifive_pl2_pmu/event=0x4001/
>                 -e /sifive_pl2_pmu/event=0x8001/ ls
> 
>  Performance counter stats for 'CPU(s) 0':
> 
>                251      sifive_pl2_pmu/event=0x10001/
>               2620      sifive_pl2_pmu/event=0x4001/
>                644      sifive_pl2_pmu/event=0x8001/
> 
>        0.092827110 seconds time elapsed
> 
> Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
> Signed-off-by: Eric Lin <eric.lin@...ive.com>
> Reviewed-by: Zong Li <zong.li@...ive.com>
> Reviewed-by: Nick Hu <nick.hu@...ive.com>
> ---
>  drivers/soc/sifive/Kconfig            |   9 +
>  drivers/soc/sifive/Makefile           |   1 +
>  drivers/soc/sifive/sifive_pl2.h       |  20 +
>  drivers/soc/sifive/sifive_pl2_cache.c |  16 +
>  drivers/soc/sifive/sifive_pl2_pmu.c   | 669 ++++++++++++++++++++++++++

Perf drivers should be in drivers/perf, no?

Cheers,
Conor.

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