[BUG?]: cpufreqency scaling - wrong frequency detected

From: Matthias-Christian Ott
Date: Thu Jan 20 2005 - 15:14:12 EST

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Hi!
The Kernel cpufrequency scaling modul seems to have a bug, it displays the frequency of 14,60 Ghz. I don't enabled debugging in the config, but I hope this information can help you. I don't know if it's really a bug, so I send it to the mailing list instead of reporting it to the bugzilla bugtracking system. if you need additional information, I'll compile a Kernel with cpufreq debugging.

Matthias-Christian Ott

[fox@iceowl ~]$ cat /proc/version
Linux version 2.6.11-rc1-bk7-ott (root@xxxxxxxxxxxxxxxxxxxxxx) (gcc-Version 3.4.3) #1 SMP Thu Jan 20 16:18:06 CET 2005

[root@iceowl ~]# dmesg
ACPI: RSDP (v000 MSISYS ) @ 0x000f7550
ACPI: RSDT (v001 MSISYS MSI ACPI 0x42302e31 AWRD 0x00000000) @ 0x17ff3000
ACPI: FADT (v001 MSISYS MSI ACPI 0x42302e31 AWRD 0x00000000) @ 0x17ff3040
ACPI: MADT (v001 MSISYS AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x17ff6c40
ACPI: DSDT (v001 MSISYS AWRDACPI 0x00001000 MSFT 0x0100000c) @ 0x00000000
ACPI: PM-Timer IO Port: 0x4008
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
Processor #0 15:1 APIC version 20
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high level)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Enabling APIC mode: Flat. Using 1 I/O APICs
Using ACPI (MADT) for SMP configuration information
Built 1 zonelists
Kernel command line: root=/dev/discs/disc0/part1 video=vesafb:ywrap,mtrr vga=0x318 elevator=cfq ro mem=393152K
[..]
CPU: After generic identify, caps: 3febfbff 00000000 00000000 00000000 00000000 00000000 00000000
CPU: After vendor identify, caps: 3febfbff 00000000 00000000 00000000 00000000 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 256K
CPU: Hyper-Threading is disabled
CPU: After all inits, caps: 3febfbff 00000000 00000000 00000080 00000000 00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (12) available
CPU0: Thermal monitoring enabled
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
CPU0: Intel(R) Pentium(R) 4 CPU 1.80GHz stepping 02
per-CPU timeslice cutoff: 731.50 usecs.
[..]
Total of 1 processors activated (3563.52 BogoMIPS).
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 pin1=2 pin2=-1
Brought up 1 CPUs
CPU0 attaching sched-domain:
domain 0: span 1
groups: 1
domain 1: span 1
groups: 1
[..]
ACPI: Subsystem revision 20041210
ACPI-1138: *** Error: Method execution failed [\STRC] (Node d7fc3660), AE_AML_BUFFER_LIMIT
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0._INI] (Node d7fc7420), AE_AML_BUFFER_LIMIT
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
PCI: Transparent bridge - 0000:00:1e.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.HUB0._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 11 *12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNK0] (IRQs 3 4 *5 6 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNK1] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
[..]
ACPI: Power Button (FF) [PWRF]
ACPI: Sleep Button (CM) [SLPB]
ACPI: Fan [FAN] (on)
ACPI: CPU0 (power states: C1[C1] C2[C2])
ACPI: Processor [CPU0] (supports 2 throttling states)
ACPI: Thermal Zone [THRM] (22 C)
[..]
p4-clockmod: P4/Xeon(TM) CPU On-Demand Clock Modulation available
[..]

[root@iceowl ~]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 1
model name : Intel(R) Pentium(R) 4 CPU 1.80GHz
stepping : 2
cpu MHz : 1800.257
cache size : 256 KB
physical id : 0
siblings : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
bogomips : 3563.52

[root@iceowl ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
14600000

[root@iceowl ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
3650000 5475000 7300000 9125000 10950000 12775000 14600000

[root@iceowl ~]# cat /home/fox/builds/kernel/kernel-2.6.10-rc1-ott/config
[..]
CONFIG_X86_PC=y
[..]
CONFIG_MPENTIUM4=y
[..]
CONFIG_X86_GENERIC=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_L1_CACHE_SHIFT=7
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_HPET_TIMER=y
CONFIG_SMP=y
CONFIG_NR_CPUS=4
CONFIG_SCHED_SMT=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_BKL=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_TSC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=m
CONFIG_X86_MCE_P4THERMAL=y
CONFIG_TOSHIBA=m
CONFIG_I8K=m
[..]
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_SOFTWARE_SUSPEND=y
CONFIG_PM_STD_PARTITION=""
[..]
CONFIG_ACPI=y
CONFIG_ACPI_BOOT=y
CONFIG_ACPI_INTERPRETER=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_SLEEP_PROC_FS=y
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=y
CONFIG_ACPI_FAN=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_ASUS=m
CONFIG_ACPI_IBM=m
CONFIG_ACPI_TOSHIBA=m
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_BUS=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_PCI=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
# CONFIG_ACPI_CONTAINER is not set
[..]
CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=m
CONFIG_CPU_FREQ_STAT_DETAILS=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_TABLE=y
[..]
CONFIG_X86_ACPI_CPUFREQ=y
CONFIG_X86_POWERNOW_K6=m
CONFIG_X86_POWERNOW_K7=m
CONFIG_X86_POWERNOW_K7_ACPI=y
CONFIG_X86_POWERNOW_K8=m
CONFIG_X86_POWERNOW_K8_ACPI=y
CONFIG_X86_GX_SUSPMOD=m
CONFIG_X86_SPEEDSTEP_CENTRINO=m
CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI=y
CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE=y
CONFIG_X86_SPEEDSTEP_ICH=m
CONFIG_X86_SPEEDSTEP_SMI=m
CONFIG_X86_P4_CLOCKMOD=y
CONFIG_X86_CPUFREQ_NFORCE2=m
CONFIG_X86_LONGRUN=m
CONFIG_X86_LONGHAUL=m
[..]
# CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set
CONFIG_X86_SPEEDSTEP_LIB=y
CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK=y
[..]

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Next message: Eric W. Biederman: "Re: [Fastboot] Re: [PATCH 0/29] overview"
Previous message: Russell King: "Re: serial8250_init and platform_device"
Next in thread: Dominik Brodowski: "Re: [BUG?]: cpufreqency scaling - wrong frequency detected"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]