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From: Christian Gmeiner <christian.gmeiner@gmail.com>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: David Airlie <airlied@linux.ie>,
	LKML <linux-kernel@vger.kernel.org>,
	"open list:DRM DRIVERS FOR VIVANTE GPU IP"
	<dri-devel@lists.freedesktop.org>,
	"moderated list:DRM DRIVERS FOR VIVANTE GPU IP"
	<etnaviv@lists.freedesktop.org>,
	Russell King <linux+etnaviv@armlinux.org.uk>
Subject: Re: [PATCH v2 1/4] drm/etnaviv: add simple moving average (SMA)
Date: Sat, 2 Jul 2022 13:41:54 +0200	[thread overview]
Message-ID: <CAH9NwWf11tcQctdQhk5AoKT-Nz-ujMRaQJjfVydNDnT==+S+_w@mail.gmail.com> (raw)
In-Reply-To: <1a694037c631c298c6952cdf4bf54fcc6d2f08e9.camel@pengutronix.de>

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

WARNING: multiple messages have this Message-ID (diff)
From: Christian Gmeiner <christian.gmeiner@gmail.com>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	David Airlie <airlied@linux.ie>,
	"moderated list:DRM DRIVERS FOR VIVANTE GPU IP" 
	<etnaviv@lists.freedesktop.org>,
	"open list:DRM DRIVERS FOR VIVANTE GPU IP" 
	<dri-devel@lists.freedesktop.org>,
	Daniel Vetter <daniel@ffwll.ch>,
	Russell King <linux+etnaviv@armlinux.org.uk>
Subject: Re: [PATCH v2 1/4] drm/etnaviv: add simple moving average (SMA)
Date: Sat, 2 Jul 2022 13:41:54 +0200	[thread overview]
Message-ID: <CAH9NwWf11tcQctdQhk5AoKT-Nz-ujMRaQJjfVydNDnT==+S+_w@mail.gmail.com> (raw)
In-Reply-To: <1a694037c631c298c6952cdf4bf54fcc6d2f08e9.camel@pengutronix.de>

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

  reply	other threads:[~2022-07-02 11:42 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-21  7:20 [PATCH v2 0/4] Add support for GPU load values Christian Gmeiner
2022-06-21  7:20 ` Christian Gmeiner
2022-06-21  7:20 ` [PATCH v2 1/4] drm/etnaviv: add simple moving average (SMA) Christian Gmeiner
2022-06-21  7:20   ` Christian Gmeiner
2022-06-24  9:22   ` Lucas Stach
2022-06-24  9:22     ` Lucas Stach
2022-07-02 11:41     ` Christian Gmeiner [this message]
2022-07-02 11:41       ` Christian Gmeiner
2022-06-21  7:20 ` [PATCH v2 2/4] drm/etnaviv: add loadavg accounting Christian Gmeiner
2022-06-21  7:20   ` Christian Gmeiner
2022-06-24  9:38   ` Lucas Stach
2022-06-24  9:38     ` Lucas Stach
2022-07-02 11:53     ` Christian Gmeiner
2022-07-02 11:53       ` Christian Gmeiner
2022-06-21  7:20 ` [PATCH v2 3/4] drm/etnaviv: show loadavg in debugfs Christian Gmeiner
2022-06-21  7:20   ` Christian Gmeiner
2022-06-21  7:20 ` [PATCH v2 4/4] drm/etnaviv: export loadavg via perfmon Christian Gmeiner
2022-06-21  7:20   ` Christian Gmeiner
2022-06-24  9:44   ` Lucas Stach
2022-06-24  9:44     ` Lucas Stach
2022-07-02 11:57     ` Christian Gmeiner
2022-07-02 11:57       ` Christian Gmeiner

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