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Re: [Xen-devel] CPU frequency throttling based on the temperature
- To: Fredy P. <fredy.pulido@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <JBeulich@xxxxxxxx>
- Date: Thu, 25 Jul 2019 12:54:46 +0000
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 25 Jul 2019 12:55:33 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [Xen-devel] CPU frequency throttling based on the temperature
On 25.07.2019 14:44, Fredy P. wrote:
> On Wed, 2019-07-24 at 17:41 +0200, Roger Pau Monné wrote:
>>>> What hardware interface does thermald (or the driver in Linux if
>>>> there's one) use to get the temperature data?
>
> In our initial POC using Xen 4.8.x we where using Linux coretemp driver
> reading by example /class/sys/hwmon/hwmon0/temp3_input but it got
> deprecated at commit 72e038450d3d5de1a39f0cfa2d2b0f9b3d43c6c6
Hmm, I wouldn't call this deprecation, but a regression. I would
say we want to re-expose this leaf to Dom0, the more that the
commit also only mentions unprivileged domains. Andrew?
Jan
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