linux-kernel - Re: [PATCH v5 00/25] Add perf support to the rockchip-dfi driver

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Message-ID: <CAEwRq=rUUatDp0JePkDPRkx81c9=sO6ZoW+V=g2S7B8_s-R3uA@mail.gmail.com>
Date:   Wed, 14 Jun 2023 14:19:06 +0000
From:   Vincent Legoll <vincent.legoll@...il.com>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
Cc:     Sascha Hauer <s.hauer@...gutronix.de>,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Heiko Stuebner <heiko@...ech.de>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>, kernel@...gutronix.de,
        Michael Riesch <michael.riesch@...fvision.net>,
        Robin Murphy <robin.murphy@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 00/25] Add perf support to the rockchip-dfi driver

Hello Sascha, Sebastian,

On Wed, Jun 14, 2023 at 1:40 PM Sebastian Reichel
<sebastian.reichel@...labora.com> wrote:
> On Wed, May 24, 2023 at 10:31:28AM +0200, Sascha Hauer wrote:
> > This is v5 of the series adding perf support to the rockchip DFI driver.
> > [...]
> > The RK3588 device tree changes for the DFI were not part of v4. As
> > Vincent Legoll showed interest in testing this series the necessary
> > device tree changes are now part of this series.
>
> I tested the series on RK3588 EVB1. The read/write byts looks
> sensible. Sometimes cycles reads unrealistic values, though:
> [...]
> Otherwise the series is
>
> Tested-by: Sebastian Reichel <sebastian.reichel@...labora.com>
>
> -- Sebastian

I also tested this new version of the series on a Pine64 QuartzPro64 dev board.

I applied the series on top of my local branch, which is based on Collabora's
rockchip-3588 plus some QP64 DTS patches, and your V5 patch series.

Looks like this is still working properly:

-bash-5.1# uname -a
Linux qp64 6.4.0-rc1-00140-g658dd2200e2a #24 SMP PREEMPT Wed Jun 14
15:50:34 CEST 2023 aarch64 GNU/Linux

-bash-5.1# zgrep -i _dfi /proc/config.gz
CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI=y

-bash-5.1# perf list | grep rockchip_ddr
  rockchip_ddr/bytes/                                [Kernel PMU event]
  rockchip_ddr/cycles/                               [Kernel PMU event]
  rockchip_ddr/read-bytes/                           [Kernel PMU event]
  rockchip_ddr/read-bytes0/                          [Kernel PMU event]
  rockchip_ddr/read-bytes1/                          [Kernel PMU event]
  rockchip_ddr/read-bytes2/                          [Kernel PMU event]
  rockchip_ddr/read-bytes3/                          [Kernel PMU event]
  rockchip_ddr/write-bytes/                          [Kernel PMU event]
  rockchip_ddr/write-bytes0/                         [Kernel PMU event]
  rockchip_ddr/write-bytes1/                         [Kernel PMU event]
  rockchip_ddr/write-bytes2/                         [Kernel PMU event]
  rockchip_ddr/write-bytes3/                         [Kernel PMU event]

# With no memory load
-bash-5.1# perf stat -a -e
rockchip_ddr/cycles/,rockchip_ddr/read-bytes/,rockchip_ddr/write-bytes/,rockchip_ddr/bytes/
sleep 1

 Performance counter stats for 'system wide':

        1058691047      rockchip_ddr/cycles/
              9.35 MB   rockchip_ddr/read-bytes/
              0.57 MB   rockchip_ddr/write-bytes/
              9.90 MB   rockchip_ddr/bytes/

       1.002616498 seconds time elapsed

# With a hog
-bash-5.1# memtester 4G > /dev/null 2>&1 &
-bash-5.1# perf stat -a -e
rockchip_ddr/cycles/,rockchip_ddr/read-bytes/,rockchip_ddr/write-bytes/,rockchip_ddr/bytes/
sleep 10

 Performance counter stats for 'system wide':

       10561540038      rockchip_ddr/cycles/
          60212.59 MB   rockchip_ddr/read-bytes/
          31313.03 MB   rockchip_ddr/write-bytes/
          91525.60 MB   rockchip_ddr/bytes/

      10.001651886 seconds time elapsed

You can add my T-B, for the whole series:

Tested-by: Vincent Legoll <vincent.legoll@...il.com>

Or is there something else you want me to test ?

Thanks for your work
Regards

--
Vincent Legoll