From: Gerfried Maier <moali@sbox.tugraz.at>
To: linux-acpi@vger.kernel.org
Subject: CPU - Power state (Cx) usage count not working
Date: Mon, 23 Jan 2006 09:19:49 +0100 [thread overview]
Message-ID: <43D491A5.6010000@sbox.tugraz.at> (raw)
Hi everybody!
According to the ACPI4Linux doc
cat /proc/acpi/processor/CPU0/power
should look like
active state: C2
default state: C1
bus master activity: 00004f00
states:
C1: promotion[C2] demotion[--] latency[000]
usage[00033670]
*C2: promotion[C3] demotion[C1] latency[084]
usage[00357060]
C3: promotion[--] demotion[C2] latency[120]
usage[00000000]
Unfortunaltely on my system (P4m 1800Mhz; 2.4.31 or .32) the usage count
shows always 00000000. Unloading several modules (eg usb-ohci) has no
effect.
IIrc the count and the statistics were working in earlier times (arond
2.4.25+) All of them vanilla with the preemptive patch from
http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/v2.4/
Is there anything I can do to figure out more on the reason?
Of course I would like to know whether this is only a symptom for a
minor proble or wheher the whole power-state thing is not working,
resulting in shorter battery life.
Thanks for your help!
G. Maier
next reply other threads:[~2006-01-23 8:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-23 8:19 Gerfried Maier [this message]
2006-01-23 10:40 ` CPU - Power state (Cx) usage count not working Niko Ehrenfeuchter
2006-01-23 11:39 ` Gerfried Maier
2006-01-23 12:33 ` Niko Ehrenfeuchter
2006-02-01 14:44 ` Gerfried Maier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=43D491A5.6010000@sbox.tugraz.at \
--to=moali@sbox.tugraz.at \
--cc=linux-acpi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox