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SubjectRe: [BUG?]: cpufreqency scaling - wrong frequency detected
Pallipadi, Venkatesh wrote:

>Never mind about acpidmp. This seems to be a issue with
>p4-clockmod.c/speedstep-lib.c and the routine which gets the initial
>frequency. As a result all frequencies are getting multiplied by 8. Not
>sure what the exact bug is though. Dominik can give a better answer.
>Cpufreq debug messages will help.
>
>Thanks,
>Venki
>
>
>
>>-----Original Message-----
>>From: Pallipadi, Venkatesh
>>Sent: Thursday, January 20, 2005 12:56 PM
>>To: 'Matthias-Christian Ott'; linux-kernel@vger.kernel.org
>>Cc: linux@brodo.de; Nakajima, Jun; Zou, Nanhai
>>Subject: RE: [BUG?]: cpufreqency scaling - wrong frequency detected
>>
>>
>>Hi,
>>
>>Can you send the output of 'acpidmp' from this system to me?
>>If acpidmp is not already installed, you should be able to
>>grab it from here.
>>http://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/utils/
>>
>>Thanks,
>>Venki
>>
>>
>>
>>>-----Original Message-----
>>>From: Matthias-Christian Ott [mailto:matthias.christian@tiscali.de]
>>>Sent: Thursday, January 20, 2005 12:13 PM
>>>To: Linux Kernel Mailing List
>>>Cc: linux@brodo.de; Nakajima, Jun; Pallipadi, Venkatesh; Zou, Nanhai
>>>Subject: [BUG?]: cpufreqency scaling - wrong frequency detected
>>>
>>>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@iceowl.ott.dyndns.info)
>>>(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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>
>
>
Hi!
Cpufreq (with enabled debugging (not CONFIG_DEBUG_KERNEL)) doesn't
display any additional messages. I'll compile it with CONFIG_DEBUG_KERNEL.

Matthias-Christian Ott
-
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