linux-kernel - Re: [PATCH] drm/msm: Avoid rounding down to zero jiffies

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Message-Id: <168004255459.1060915.15692339879242886666.b4-ty@linaro.org>
Date:   Wed, 29 Mar 2023 01:38:01 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     dri-devel@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>
Cc:     freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        Rob Clark <robdclark@...omium.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm: Avoid rounding down to zero jiffies


On Fri, 24 Mar 2023 15:00:13 -0700, Rob Clark wrote:
> If userspace asked for a timeout greater than zero, but less than a
> jiffy, they clearly weren't planning on spinning.  So it is better
> to round up to one.
> 
> This fixes an issue with supertuxkart that was (for some reason)
> spinning on a gl sync with 1ms timeout.  CPU time for a demo lap
> drops from:
> 
> [...]

Applied, thanks!

[1/1] drm/msm: Avoid rounding down to zero jiffies
      https://gitlab.freedesktop.org/lumag/msm/-/commit/a5c5593477b0

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>