linux-kernel - Re: [gpio] f69e00bd21: unixbench.score -24.2% regression

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Message-ID: <CACRpkdYmtgO_E-KKE8zjA04POawJ=4RN3xFUPY__7GF+gSNbNQ@mail.gmail.com>
Date:   Tue, 16 Jul 2019 23:42:15 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     kernel test robot <rong.a.chen@...el.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     David Woods <dwoods@...lanox.com>,
        Shravan Kumar Ramani <sramani@...lanox.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKP <lkp@...org>
Subject: Re: [gpio] f69e00bd21: unixbench.score -24.2% regression

On Wed, Jul 10, 2019 at 2:15 PM kernel test robot <rong.a.chen@...el.com> wrote:

> FYI, we noticed a -24.2% regression of unixbench.score due to commit:
> commit: f69e00bd21aa6a1961c521b6eb199137fcb8a76a ("gpio: mmio: Support two direction registers")
> https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master

That's pretty bogus since the test doesn't even seem to be using GPIO.
Further AFAIK Intel chips don't even use that driver.

Can you provide some rootcausing?

If you are using GPIOs from userspace in the test somehow I am
sure both me and Bartosz would be interested to hear how.

Yours,
Linus Walleij