From: Alex Kost <alezost@gmail.com>
To: matias_jose_seco@autoproduzioni.net
Cc: guix-devel@gnu.org
Subject: Re: Of sounds and locales
Date: Sun, 25 Oct 2015 22:07:36 +0300 [thread overview]
Message-ID: <871tcig41z.fsf@gmail.com> (raw)
In-Reply-To: <d65c68e101107a33138ffabec426d7e1@autoproduzioni.net> (matias jose seco's message of "Sat, 24 Oct 2015 15:28:52 +0000")
matias_jose_seco@autoproduzioni.net (2015-10-24 18:28 +0300) wrote:
> As always destiny seems to challenge our will to reach the peak!
>
>> Another option to reduce the whistle is to run "powertop --auto-tune"
>> after boot. Here's a service definition I put into my OS config to
>> do this:
>>
>> --8<---------------cut here---------------start------------->8---
>> (define (powertop-auto-tune-service)
>> (let ((powertop #~(string-append #$powertop "/sbin/powertop")))
>> (with-monad %store-monad
>> (return
>> (service
>> (documentation "Run powertop --auto-tune.")
>> (provision '(powertop-auto-tune))
>> (requirement '(user-processes))
>> (start #~(lambda _
>> (zero? (system* #$powertop "--auto-tune")))))))))
>> --8<---------------cut here---------------end--------------->8---
>>
>> And then include (powertop-auto-tune-service) in the 'services' field.
>> Note, you'll need to import some extra modules at the top of the file:
>>
>> --8<---------------cut here---------------start------------->8---
>> (use-modules (gnu)
>> (gnu services)
>> (guix gexp)
>> (guix store)
>> (guix monads))
>> --8<---------------cut here---------------end--------------->8---
>>
>> [...]
>>
>> My workaround was to add another service that disables the
>> second CPU core when it gets too hot. Here's the service definition I
>> used:
>>
>> --8<---------------cut here---------------start------------->8---
>> (define (temperature-regulation-service)
>> (with-monad %store-monad
>> (return
>> (service
>> (documentation "Regulate temperature on an overclocked Libreboot
>> X60.")
>> (provision '(temperature-regulation))
>> (requirement '(user-processes))
>> (start #~(lambda _
>> (let ((pid (primitive-fork)))
>> (if (positive? pid)
>> pid
>> (let ()
>> (define (current-temp)
>> (call-with-input-file
>> "/sys/class/thermal/thermal_zone0/temp"
>> read))
>> (define (set-cpu1-online! online?)
>> (call-with-output-file
>> "/sys/devices/system/cpu/cpu1/online"
>> (lambda (port)
>> (write (if online? 1 0) port))))
>> (let loop ()
>> (let ((temp (current-temp)))
>> (cond ((< temp 88000) (set-cpu1-online!
>> #t))
>> ((> temp 92000) (set-cpu1-online!
>> #f))))
>> (sleep 2)
>> (loop)))))))
>> (stop #~(make-kill-destructor))
>> (respawn? #t)))))
>> --8<---------------cut here---------------end--------------->8---
>>
>> and as above, you'll need to add (temperature-regulation-service) to
>> the
>> services field, and of course run "guix system reconfigure <OS-CONFIG>"
>> and reboot.
>>
>
> Should i add (define (temperature-regulation-service)...
> and (define (powertop-auto-tune-service)...
> inside (operating-system) definition ?
Nope, these are top-level definition, so it should be done like this:
(define ...)
(operating-system ...)
By the way, recently the service API was changed, so those service
definitions will not work anymore.
--
Alex
next prev parent reply other threads:[~2015-10-25 19:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-15 20:08 Of sounds and locales matias_jose_seco
2015-07-16 10:59 ` Alex Kost
2015-07-16 23:16 ` Ludovic Courtès
2015-07-27 18:21 ` matias_jose_seco
2015-07-27 21:30 ` Mark H Weaver
2015-07-27 21:39 ` Mark H Weaver
2015-10-24 15:28 ` matias_jose_seco
2015-10-25 19:07 ` Alex Kost [this message]
2015-11-01 22:26 ` matias_jose_seco
2015-11-02 9:01 ` Ludovic Courtès
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