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Why do I have a /sys/devices/system/cpu/cpuidle under kernel 2.6.24 with a Pentium M processor ?

DISCUSSION Toralf Förster 2 participants 3 messages Jan 31, 2008 – Feb 5, 2008 ACPI

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Toralf Förster

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#0 lore raw

I'm asking b/c this confuses the current sysstat up to version 8.0.4. An

$ ls -lR /sys/devices/system/cpu/

gives :

/sys/devices/system/cpu/:
total 0
drwxr-xr-x 4 root root 0 Jan 30 09:36 cpu0 drwxr-xr-x 2 root root 0 Jan 30 09:36 cpuidle

/sys/devices/system/cpu/cpu0:
total 0
drwxr-xr-x 3 root root 0 Jan 30 09:36 cpufreq drwxr-xr-x 5 root root 0 Jan 30 09:36 cpuidle

/sys/devices/system/cpu/cpu0/cpufreq:
total 0
-r--r--r-- 1 root root 4096 Jan 30 09:36 affected_cpus -r-------- 1 root root 4096 Jan 30 09:36 cpuinfo_cur_freq -r--r--r-- 1 root root 4096 Jan 30 09:36 cpuinfo_max_freq -r--r--r-- 1 root root 4096 Jan 30 09:36 cpuinfo_min_freq
drwxr-xr-x 2 root root 0 Jan 30 09:36 ondemand
-r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_available_frequencies -r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_available_governors -r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_cur_freq -r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_driver -rw-r--r-- 1 root root 4096 Jan 30 09:36 scaling_governor -rw-r--r-- 1 root root 4096 Jan 30 09:36 scaling_max_freq -rw-r--r-- 1 root root 4096 Jan 30 09:36 scaling_min_freq

/sys/devices/system/cpu/cpu0/cpufreq/ondemand:
total 0
-rw-r--r-- 1 root root 0 Jan 30 09:36 ignore_nice_load
-rw-r--r-- 1 root root 4096 Jan 30 09:36 powersave_bias -rw-r--r-- 1 root root 4096 Jan 30 09:36 sampling_rate -r--r--r-- 1 root root 4096 Jan 30 09:36 sampling_rate_max -r--r--r-- 1 root root 4096 Jan 30 09:36 sampling_rate_min -rw-r--r-- 1 root root 4096 Jan 30 09:36 up_threshold

/sys/devices/system/cpu/cpu0/cpuidle:
total 0
drwxr-xr-x 2 root root 0 Jan 30 09:36 state0 drwxr-xr-x 2 root root 0 Jan 30 09:36 state1 drwxr-xr-x 2 root root 0 Jan 30 09:36 state2

/sys/devices/system/cpu/cpu0/cpuidle/state0:
total 0
-r--r--r-- 1 root root 4096 Jan 30 09:36 latency -r--r--r-- 1 root root 4096 Jan 30 09:36 name -r--r--r-- 1 root root 4096 Jan 30 09:36 power -r--r--r-- 1 root root 4096 Jan 30 09:36 time -r--r--r-- 1 root root 4096 Jan 30 09:36 usage

/sys/devices/system/cpu/cpu0/cpuidle/state1:
total 0
-r--r--r-- 1 root root 4096 Jan 30 09:36 latency -r--r--r-- 1 root root 4096 Jan 30 09:36 name -r--r--r-- 1 root root 4096 Jan 30 09:36 power -r--r--r-- 1 root root 4096 Jan 30 09:36 time -r--r--r-- 1 root root 4096 Jan 30 09:36 usage

/sys/devices/system/cpu/cpu0/cpuidle/state2:
total 0
-r--r--r-- 1 root root 4096 Jan 30 09:36 latency -r--r--r-- 1 root root 4096 Jan 30 09:36 name -r--r--r-- 1 root root 4096 Jan 30 09:36 power -r--r--r-- 1 root root 4096 Jan 30 09:36 time -r--r--r-- 1 root root 4096 Jan 30 09:36 usage

/sys/devices/system/cpu/cpuidle:
total 0
-r--r--r-- 1 root root 4096 Jan 30 09:36 current_driver -r--r--r-- 1 root root 4096 Jan 30 09:36 current_governor_ro

Signature · 4 lines
MfG/Sincerely

Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
#1 lore raw

On Thu, 31 Jan 2008 14:00:14 +0100 Toralf Förster <[email protected]> wrote:

(suitable cc's added)

Quoted 1 line

I'm asking b/c this confuses the current sysstat up to version 8.0.4. An

That would be bad. Please define "confuses"?

Quoted 79 lines
$ ls -lR /sys/devices/system/cpu/

gives :

/sys/devices/system/cpu/:
total 0
drwxr-xr-x 4 root root 0 Jan 30 09:36 cpu0 drwxr-xr-x 2 root root 0 Jan 30 09:36 cpuidle

/sys/devices/system/cpu/cpu0:
total 0
drwxr-xr-x 3 root root 0 Jan 30 09:36 cpufreq drwxr-xr-x 5 root root 0 Jan 30 09:36 cpuidle

/sys/devices/system/cpu/cpu0/cpufreq:
total 0

(quoted diff) +0 -4
-r--r--r-- 1 root root 4096 Jan 30 09:36 affected_cpus
-r-------- 1 root root 4096 Jan 30 09:36 cpuinfo_cur_freq
-r--r--r-- 1 root root 4096 Jan 30 09:36 cpuinfo_max_freq
-r--r--r-- 1 root root 4096 Jan 30 09:36 cpuinfo_min_freq

drwxr-xr-x 2 root root 0 Jan 30 09:36 ondemand

(quoted diff) +0 -7
-r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_available_frequencies
-r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_available_governors
-r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_cur_freq
-r--r--r-- 1 root root 4096 Jan 30 09:36 scaling_driver
-rw-r--r-- 1 root root 4096 Jan 30 09:36 scaling_governor
-rw-r--r-- 1 root root 4096 Jan 30 09:36 scaling_max_freq
-rw-r--r-- 1 root root 4096 Jan 30 09:36 scaling_min_freq

/sys/devices/system/cpu/cpu0/cpufreq/ondemand:
total 0

(quoted diff) +0 -6
-rw-r--r-- 1 root root    0 Jan 30 09:36 ignore_nice_load
-rw-r--r-- 1 root root 4096 Jan 30 09:36 powersave_bias
-rw-r--r-- 1 root root 4096 Jan 30 09:36 sampling_rate
-r--r--r-- 1 root root 4096 Jan 30 09:36 sampling_rate_max
-r--r--r-- 1 root root 4096 Jan 30 09:36 sampling_rate_min
-rw-r--r-- 1 root root 4096 Jan 30 09:36 up_threshold

/sys/devices/system/cpu/cpu0/cpuidle:
total 0
drwxr-xr-x 2 root root 0 Jan 30 09:36 state0 drwxr-xr-x 2 root root 0 Jan 30 09:36 state1 drwxr-xr-x 2 root root 0 Jan 30 09:36 state2

/sys/devices/system/cpu/cpu0/cpuidle/state0:
total 0

(quoted diff) +0 -5
-r--r--r-- 1 root root 4096 Jan 30 09:36 latency
-r--r--r-- 1 root root 4096 Jan 30 09:36 name
-r--r--r-- 1 root root 4096 Jan 30 09:36 power
-r--r--r-- 1 root root 4096 Jan 30 09:36 time
-r--r--r-- 1 root root 4096 Jan 30 09:36 usage

/sys/devices/system/cpu/cpu0/cpuidle/state1:
total 0

(quoted diff) +0 -5
-r--r--r-- 1 root root 4096 Jan 30 09:36 latency
-r--r--r-- 1 root root 4096 Jan 30 09:36 name
-r--r--r-- 1 root root 4096 Jan 30 09:36 power
-r--r--r-- 1 root root 4096 Jan 30 09:36 time
-r--r--r-- 1 root root 4096 Jan 30 09:36 usage

/sys/devices/system/cpu/cpu0/cpuidle/state2:
total 0

(quoted diff) +0 -5
-r--r--r-- 1 root root 4096 Jan 30 09:36 latency
-r--r--r-- 1 root root 4096 Jan 30 09:36 name
-r--r--r-- 1 root root 4096 Jan 30 09:36 power
-r--r--r-- 1 root root 4096 Jan 30 09:36 time
-r--r--r-- 1 root root 4096 Jan 30 09:36 usage

/sys/devices/system/cpu/cpuidle:
total 0

(quoted diff) +0 -2
-r--r--r-- 1 root root 4096 Jan 30 09:36 current_driver
-r--r--r-- 1 root root 4096 Jan 30 09:36 current_governor_ro
Signature · 5 lines
-- 
MfG/Sincerely

Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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author
#2 lore raw
Quoted 17 lines · At Tuesday 05 February 2008 Andrew Morton wrote :

On Thu, 31 Jan 2008 14:00:14 +0100 Toralf Förster <[email protected]> wrote:

(suitable cc's added)

Quoted 1 line

I'm asking b/c this confuses the current sysstat up to version 8.0.4. An

That would be bad. Please define "confuses"?

Quoted 9 lines
$ ls -lR /sys/devices/system/cpu/

gives :

/sys/devices/system/cpu/:
total 0
drwxr-xr-x 4 root root 0 Jan 30 09:36 cpu0
drwxr-xr-x 2 root root 0 Jan 30 09:36 cpuidle

The sysstat reports 2 CPUs : cpu0 contains the expected data, cpu1 has zeros.

I tested succesfulyl version 8.0.4.1 sent by Sebastien Godard which solved this issue, but that version seems not to be released until today.

Signature · 4 lines
MfG/Sincerely

Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3