* Getting cpu frequency
@ 2006-02-11 20:47 Nico Golde
2006-02-11 21:37 ` Dave Jones
0 siblings, 1 reply; 6+ messages in thread
From: Nico Golde @ 2006-02-11 20:47 UTC (permalink / raw)
To: linux-kernel
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Hi,
at the moment I try to get the current cpu frequency via
using the cpufreq_get() function defined in linux/cpufreq.h.
Can someone point me to the headers I have to include to let
this work because just doing #include <linux/cpufreq.h>
results in a bunch of errors:
[...]
In file included from /usr/include/linux/cpu.h:22,
from cpu.c:2:
/usr/include/linux/sysdev.h:31: error: field 'drivers' has incomplete type
/usr/include/linux/sysdev.h:35: error: syntax error before 'pm_message_t'
/usr/include/linux/sysdev.h:37: error: field 'kset' has incomplete type
/usr/include/linux/sysdev.h:50: error: field 'entry' has incomplete type
/usr/include/linux/sysdev.h:54: error: syntax error before 'pm_message_t'
/usr/include/linux/sysdev.h:69: error: syntax error before 'u32'
/usr/include/linux/sysdev.h:72: error: syntax error before '}' token
/usr/include/linux/sysdev.h:79: error: field 'attr' has incomplete type
/usr/include/linux/sysdev.h:80: error: syntax error before 'ssize_
[...]
Using 2.6.14.
Regards Nico
P.S. Please CC me, I am not subsribed, thanks
--
Nico Golde - JAB: nion@jabber.ccc.de | GPG: 0x73647CFF
http://www.ngolde.de | http://www.muttng.org | http://grml.org
Forget about that mouse with 3/4/5 buttons -
gimme a keyboard with 103/104/105 keys!
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Getting cpu frequency
2006-02-11 20:47 Getting cpu frequency Nico Golde
@ 2006-02-11 21:37 ` Dave Jones
2006-02-11 21:42 ` Nico Golde
0 siblings, 1 reply; 6+ messages in thread
From: Dave Jones @ 2006-02-11 21:37 UTC (permalink / raw)
To: Nico Golde; +Cc: linux-kernel
On Sat, Feb 11, 2006 at 09:47:34PM +0100, Nico Golde wrote:
> Hi,
> at the moment I try to get the current cpu frequency via
> using the cpufreq_get() function defined in linux/cpufreq.h.
> Can someone point me to the headers I have to include to let
> this work because just doing #include <linux/cpufreq.h>
> results in a bunch of errors:
> [...]
> In file included from /usr/include/linux/cpu.h:22,
> from cpu.c:2:
> /usr/include/linux/sysdev.h:31: error: field 'drivers' has incomplete type
> /usr/include/linux/sysdev.h:35: error: syntax error before 'pm_message_t'
> /usr/include/linux/sysdev.h:37: error: field 'kset' has incomplete type
> /usr/include/linux/sysdev.h:50: error: field 'entry' has incomplete type
> /usr/include/linux/sysdev.h:54: error: syntax error before 'pm_message_t'
> /usr/include/linux/sysdev.h:69: error: syntax error before 'u32'
> /usr/include/linux/sysdev.h:72: error: syntax error before '}' token
> /usr/include/linux/sysdev.h:79: error: field 'attr' has incomplete type
> /usr/include/linux/sysdev.h:80: error: syntax error before 'ssize_
> [...]
> Using 2.6.14.
> Regards Nico
> P.S. Please CC me, I am not subsribed, thanks
Are you trying to do this from a userspace program ?
If so, this isn't going to work.
Dave
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Getting cpu frequency
2006-02-11 21:37 ` Dave Jones
@ 2006-02-11 21:42 ` Nico Golde
2006-02-11 22:13 ` Dave Jones
0 siblings, 1 reply; 6+ messages in thread
From: Nico Golde @ 2006-02-11 21:42 UTC (permalink / raw)
To: linux-kernel
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Hallo Dave,
* Dave Jones <davej@redhat.com> [2006-02-11 22:38]:
> On Sat, Feb 11, 2006 at 09:47:34PM +0100, Nico Golde wrote:
> > Hi,
> > at the moment I try to get the current cpu frequency via
> > using the cpufreq_get() function defined in linux/cpufreq.h.
> > Can someone point me to the headers I have to include to let
> > this work because just doing #include <linux/cpufreq.h>
> > results in a bunch of errors:
> > [...]
> > In file included from /usr/include/linux/cpu.h:22,
> > from cpu.c:2:
> > /usr/include/linux/sysdev.h:31: error: field 'drivers' has incomplete type
> > /usr/include/linux/sysdev.h:35: error: syntax error before 'pm_message_t'
> > /usr/include/linux/sysdev.h:37: error: field 'kset' has incomplete type
> > /usr/include/linux/sysdev.h:50: error: field 'entry' has incomplete type
> > /usr/include/linux/sysdev.h:54: error: syntax error before 'pm_message_t'
> > /usr/include/linux/sysdev.h:69: error: syntax error before 'u32'
> > /usr/include/linux/sysdev.h:72: error: syntax error before '}' token
> > /usr/include/linux/sysdev.h:79: error: field 'attr' has incomplete type
> > /usr/include/linux/sysdev.h:80: error: syntax error before 'ssize_
> > [...]
> > Using 2.6.14.
> > Regards Nico
> > P.S. Please CC me, I am not subsribed, thanks
>
> Are you trying to do this from a userspace program ?
> If so, this isn't going to work.
Yes I am.
Regards Nico
--
Nico Golde - JAB: nion@jabber.ccc.de | GPG: 0x73647CFF
http://www.ngolde.de | http://www.muttng.org | http://grml.org
Forget about that mouse with 3/4/5 buttons -
gimme a keyboard with 103/104/105 keys!
[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Getting cpu frequency
2006-02-11 21:42 ` Nico Golde
@ 2006-02-11 22:13 ` Dave Jones
2006-02-11 22:16 ` Nico Golde
0 siblings, 1 reply; 6+ messages in thread
From: Dave Jones @ 2006-02-11 22:13 UTC (permalink / raw)
To: Nico Golde; +Cc: linux-kernel
On Sat, Feb 11, 2006 at 10:42:07PM +0100, Nico Golde wrote:
> Hallo Dave,
>
> * Dave Jones <davej@redhat.com> [2006-02-11 22:38]:
> > On Sat, Feb 11, 2006 at 09:47:34PM +0100, Nico Golde wrote:
> > > Hi,
> > > at the moment I try to get the current cpu frequency
> > > P.S. Please CC me, I am not subsribed, thanks
> >
> > Are you trying to do this from a userspace program ?
> > If so, this isn't going to work.
>
> Yes I am.
Read it from sysfs or /proc/cpuinfo.
But, why does your app care ?
If it's to set up some sort of timing loop, it's going to
fail miserably.
Dave
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Getting cpu frequency
2006-02-11 22:13 ` Dave Jones
@ 2006-02-11 22:16 ` Nico Golde
2006-02-12 8:46 ` Mattia Dongili
0 siblings, 1 reply; 6+ messages in thread
From: Nico Golde @ 2006-02-11 22:16 UTC (permalink / raw)
To: linux-kernel
[-- Attachment #1: Type: text/plain, Size: 976 bytes --]
* Dave Jones <davej@redhat.com> [2006-02-11 23:15]:
> On Sat, Feb 11, 2006 at 10:42:07PM +0100, Nico Golde wrote:
> > Hallo Dave,
> >
> > * Dave Jones <davej@redhat.com> [2006-02-11 22:38]:
> > > On Sat, Feb 11, 2006 at 09:47:34PM +0100, Nico Golde wrote:
> > > > Hi,
> > > > at the moment I try to get the current cpu frequency
> > > > P.S. Please CC me, I am not subsribed, thanks
> > >
> > > Are you trying to do this from a userspace program ?
> > > If so, this isn't going to work.
> >
> > Yes I am.
>
> Read it from sysfs or /proc/cpuinfo.
Thats exactly what I dont wanted to do and thought its
possible without reading a file. So it seems to be not,
thank you will use sysfs to get the information.
Regards Nico
--
Nico Golde - JAB: nion@jabber.ccc.de | GPG: 0x73647CFF
http://www.ngolde.de | http://www.muttng.org | http://grml.org
Forget about that mouse with 3/4/5 buttons -
gimme a keyboard with 103/104/105 keys!
[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Getting cpu frequency
2006-02-11 22:16 ` Nico Golde
@ 2006-02-12 8:46 ` Mattia Dongili
0 siblings, 0 replies; 6+ messages in thread
From: Mattia Dongili @ 2006-02-12 8:46 UTC (permalink / raw)
To: Nico Golde; +Cc: linux-kernel
On Sat, Feb 11, 2006 at 11:16:48PM +0100, Nico Golde wrote:
> * Dave Jones <davej@redhat.com> [2006-02-11 23:15]:
> > On Sat, Feb 11, 2006 at 10:42:07PM +0100, Nico Golde wrote:
> > > Hallo Dave,
> > >
> > > * Dave Jones <davej@redhat.com> [2006-02-11 22:38]:
> > > > On Sat, Feb 11, 2006 at 09:47:34PM +0100, Nico Golde wrote:
> > > > > Hi,
> > > > > at the moment I try to get the current cpu frequency
> > > > > P.S. Please CC me, I am not subsribed, thanks
> > > >
> > > > Are you trying to do this from a userspace program ?
> > > > If so, this isn't going to work.
> > >
> > > Yes I am.
> >
> > Read it from sysfs or /proc/cpuinfo.
>
> Thats exactly what I dont wanted to do and thought its
> possible without reading a file. So it seems to be not,
> thank you will use sysfs to get the information.
> Regards Nico
there's still libcpufreq from cpufrequtils if you wish some kind of
abstraction over reading a file.
--
mattia
:wq!
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-02-12 8:45 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-02-11 20:47 Getting cpu frequency Nico Golde
2006-02-11 21:37 ` Dave Jones
2006-02-11 21:42 ` Nico Golde
2006-02-11 22:13 ` Dave Jones
2006-02-11 22:16 ` Nico Golde
2006-02-12 8:46 ` Mattia Dongili
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