Hi All,
I'm trying to get powermanagement working with xen and a 2.6.31.6-pvops kernel
on xen 3.4.2
From what I have read, I have 2 options:
1) Let the xen hypervisor do the powermanagement (cpufreq=xen)
2) Let the dom0 kernel do the powermanagement (cpufreq=dom0-kernel)
When booting the 2.6.31.6-pvops kernel on bare metal without hypervisor the
powernow-k8 module works.
When booting the 2.6.31.6-pvops kernel as dom0 on the xen 3.4.2 hypervisor the
powernow-k8 module doesn't load and complains:
Jan 7 15:25:37 localhost kernel: [ 12.797914] powernow-k8: Found 1 AMD
Athlon(tm) Dual Core Processor 4850e processors (2 cpu cores) (version 2.20.00)
Jan 7 15:25:37 localhost kernel: [ 12.797926] powernow-k8: register
performance failed: bad ACPI data
Jan 7 15:25:37 localhost kernel: [ 12.797929] [Firmware Bug]:
powernow-k8: No compatible ACPI _PSS objects found.
Jan 7 15:25:37 localhost kernel: [ 12.797931] [Firmware Bug]:
powernow-k8: Try again with latest BIOS.
Jan 7 15:25:37 localhost kernel: [ 12.797941] powernow-k8: register
performance failed: bad ACPI data
Jan 7 15:25:37 localhost kernel: [ 12.822315] acpi-cpufreq:
acpi_cpufreq_init
Jan 7 15:25:37 localhost kernel: [ 12.822319] acpi-cpufreq:
acpi_cpufreq_early_init
Jan 7 15:25:37 localhost kernel: [ 12.822333] acpi-cpufreq:
acpi_cpufreq_cpu_init
Jan 7 15:25:37 localhost kernel: [ 12.822338] acpi-cpufreq:
acpi_cpufreq_cpu_init
It could be that additional changes are needed to the pvops kernel that have
been made to the xen 2.6.18.8 kernel ?
When trying the first option, and let the hypervisor do the powermanagement
(booting with cpufreq=xen cpufreq.debug=2 loglvl=all)
it shows the following in xm dmesg (complete xm dmesg attachted):
(XEN) Set CPU acpi_id(0) cpuid(0) Px State info:
(XEN) _PPC: 0
(XEN) Set CPU acpi_id(0) cpuid(0) Px State info:
(XEN) _PCT: descriptor=130, length=12, space_id=127, bit_width=0,
bit_offset=0, reserved=0, address=0
(XEN) _PCT: descriptor=130, length=12, space_id=127, bit_width=0,
bit_offset=0, reserved=0, address=0
(XEN) _PSS: state_count=6
(XEN) State0: 2500MHz 50000mW 100us 9us 0xe8201391 0x391
(XEN) State1: 2400MHz 46020mW 100us 9us 0xe82013d0 0x3d0
(XEN) State2: 2200MHz 38671mW 100us 9us 0xe820144e 0x44e
(XEN) State3: 2000MHz 32100mW 100us 9us 0xe82014cc 0x4cc
(XEN) State4: 1800MHz 26265mW 100us 9us 0xe820154a 0x54a
(XEN) State5: 1000MHz 13888mW 100us 9us 0xe8201582 0x582
(XEN) _PSD: num_entries=5 rev=0 domain=0 coord_type=253 num_processors=2
(XEN) _PPC: 0
(XEN) Set CPU acpi_id(1) cpuid(1) Px State info:
(XEN) _PPC: 0
(XEN) Set CPU acpi_id(1) cpuid(1) Px State info:
(XEN) _PCT: descriptor=130, length=12, space_id=127, bit_width=0,
bit_offset=0, reserved=0, address=0
(XEN) _PCT: descriptor=130, length=12, space_id=127, bit_width=0,
bit_offset=0, reserved=0, address=0
(XEN) _PSS: state_count=6
(XEN) State0: 2500MHz 50000mW 100us 9us 0xe8201391 0x391
(XEN) State1: 2400MHz 46020mW 100us 9us 0xe82013d0 0x3d0
(XEN) State2: 2200MHz 38671mW 100us 9us 0xe820144e 0x44e
(XEN) State3: 2000MHz 32100mW 100us 9us 0xe82014cc 0x4cc
(XEN) State4: 1800MHz 26265mW 100us 9us 0xe820154a 0x54a
(XEN) State5: 1000MHz 13888mW 100us 9us 0xe8201582 0x582
(XEN) _PSD: num_entries=5 rev=0 domain=0 coord_type=253 num_processors=2
(XEN) _PPC: 0
So it seems to find all available powerstates, but using xenpm doesn't seem to
work:
serveerstertje:~# xenpm get-cpu-topology
CPU core socket
CPU0 0 0
CPU1 1 0
serveerstertje:~# xenpm set-scaling-governor userspace
[CPU0] failed to set governor name
[CPU1] failed to set governor name
serveerstertje:~# xenpm set-scaling-governor ondemand
[CPU0] failed to set governor name
[CPU1] failed to set governor name
serveerstertje:~# xenpm set-scaling-governor performance
[CPU0] failed to set governor name
[CPU1] failed to set governor name
serveerstertje:~# xenpm set-scaling-governor powersave
[CPU0] failed to set governor name
[CPU1] failed to set governor name
serveerstertje:~# xenpm get-cpufreq-para
[CPU0] failed to get cpufreq parameter
[CPU1] failed to get cpufreq parameter
--
Best regards,
Sander mailto:linux@xxxxxxxxxxxxxx
xm-dmesg.txt
Description: Text document
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