From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: khali@linux-fr.org, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 00/15] PowerMac i2c API conversions & windfarm updates
Date: Thu, 26 Apr 2012 07:14:25 +1000 [thread overview]
Message-ID: <1335388465.21961.35.camel@pasglop> (raw)
In-Reply-To: <m2sjfs85pv.fsf@igel.home>
On Wed, 2012-04-25 at 12:29 +0200, Andreas Schwab wrote:
> Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
>
> > Also, does the new driver properly react to load ?
>
> The old driver keeps the cpu fans running at 300 rpm (lowest speed?)
> for much longer when the cpus are put busy. Only when the cpus are back
> idle it speeds them up to 1200 rpm or more for some time depending on
> how long the cpus were busy. The new driver is faster at speeding up
> the fans to around 800 rpm when cpus get busy, and keeps them running
> longer at that speed, but doesn't appear to select much higher speeds.
>
> The old driver appears to be better suited to desktops, whereas the new
> driver is probably better for servers.
That's odd... as I said, the algorithm is supposed to be the same...
> But the most annoying sound appears to be coming from the slots fan.
Constant or changing ? The slots fan is set to a fixed speed, which I
thought was constant (well, I "tickle" it a bit but roughly it's
constant). Or is that not the case for you ?
Darwin has an algorithm for it based on getting some data from the video
driver in the AGP slot, but I don't have that.
Cheers,
Ben.
next prev parent reply other threads:[~2012-04-25 21:14 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1334823416-9138-1-git-send-email-benh__1987.51832726902$1334826600$gmane$org@kernel.crashing.org>
2012-04-25 8:00 ` [PATCH 00/15] PowerMac i2c API conversions & windfarm updates Andreas Schwab
2012-04-25 8:38 ` Benjamin Herrenschmidt
2012-04-25 10:29 ` Andreas Schwab
2012-04-25 21:14 ` Benjamin Herrenschmidt [this message]
2012-04-25 21:54 ` Andreas Schwab
2012-04-25 21:58 ` Benjamin Herrenschmidt
2012-04-26 9:13 ` Andreas Schwab
2012-04-26 9:19 ` Benjamin Herrenschmidt
2012-04-26 11:41 ` Andreas Schwab
2012-04-26 22:06 ` Benjamin Herrenschmidt
2012-04-27 7:59 ` Andreas Schwab
2012-04-26 11:43 ` Andreas Schwab
2012-04-26 11:46 ` Andreas Schwab
2012-04-19 8:16 Benjamin Herrenschmidt
2012-04-19 9:37 ` Jean Delvare
2012-04-19 9:36 ` Christian Kujau
2012-04-19 20:59 ` Benjamin Herrenschmidt
[not found] ` <20120419113723.03a24d46__2279.25503063506$1334829915$gmane$org@endymion.delvare>
2012-04-19 10:11 ` Andreas Schwab
2012-04-19 11:02 ` Jean Delvare
[not found] ` <m27gxc2fqq.fsf__16075.0973890119$1334830355$gmane$org@igel.home>
2012-04-19 10:14 ` Andreas Schwab
[not found] ` <m239802flw.fsf__48316.0902433612$1334830569$gmane$org@igel.home>
2012-04-19 10:19 ` Andreas Schwab
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