NetBSD Problem Report #55264

From  Thu May 14 16:39:09 2020
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Date: Thu, 14 May 2020 16:39:08 +0000 (UTC)
Subject: No CPU frequency scaling tools in the base NetBSD install
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>Number:         55264
>Category:       misc
>Synopsis:       No CPU frequency scaling tools in the base NetBSD install
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 14 16:40:00 +0000 2020
>Last-Modified:  Sun May 31 19:10:01 +0000 2020
>Originator:     Sad Clouds
>Release:        9.0
Modern CPUs support frequency scaling, however NetBSD does not seem to have any tools to configure it in the base system. There is sysutils/estd package but I really think something as useful as this, should be part of the base NetBSD system.


From: Jukka Ruohonen <>
Subject: Re: misc/55264
Date: Sun, 31 May 2020 22:04:53 +0300

 This work stalled at some point.  While sysutils/estd works fine for most
 use cases, it is unclear whether the functionality should be implemented in
 the kernel, i.e.  by extending cpufreq(9). Some benchmarks are needed.

 It should be also discussed what the use cases and the desirable behavior
 are for huge systems with tens of CPUs; e.g. should it be possible to
 control the frequencies via cpuctl(8)? For instance, in some cases, it might
 be useful to set heavy-hitting CPUs to the maximum frequency while lowering
 the frequencies in other CPUs.

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