linux-kernel - Re: [PATCH v2 1/4] drm/etnaviv: add simple moving average (SMA)

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Message-ID: <CAH9NwWf11tcQctdQhk5AoKT-Nz-ujMRaQJjfVydNDnT==+S+_w@mail.gmail.com>
Date:   Sat, 2 Jul 2022 13:41:54 +0200
From:   Christian Gmeiner <christian.gmeiner@...il.com>
To:     Lucas Stach <l.stach@...gutronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        "moderated list:DRM DRIVERS FOR VIVANTE GPU IP" 
        <etnaviv@...ts.freedesktop.org>,
        "open list:DRM DRIVERS FOR VIVANTE GPU IP" 
        <dri-devel@...ts.freedesktop.org>, Daniel Vetter <daniel@...ll.ch>,
        Russell King <linux+etnaviv@...linux.org.uk>
Subject: Re: [PATCH v2 1/4] drm/etnaviv: add simple moving average (SMA)

Hi Lucas

>
> Am Dienstag, dem 21.06.2022 um 09:20 +0200 schrieb Christian Gmeiner:
> > This adds a SMA algorithm inspired by Exponentially weighted moving
> > average (EWMA) algorithm found in the kernel.
> >
> Still not sure about this one. I _feel_ that a simple moving average
> over a period of one second does not do a good job of reflecting the
> real GPU load for a bursty workload, where EWMA might be better suited.
> But then I also don't have a real informed opinion to offer on this.
>

I will play with EWMA and see what happens.

-- 
greets
--
Christian Gmeiner, MSc

https://christian-gmeiner.info/privacypolicy