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Message #28830
[Bug 524281] Re: Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core 2 Duo even with only 1 core enabled
Just a me-too report. i am also getting this as the top of the list when
seen with powertop.
Average around 43 is the number of wakeups/sec from [Kernel Scheduler]
Load Balancing Tick.
I don't want to disable compiz, so haven't yet tried out the workaround
as at-least for me, that's not a solution.
Pls. let me know if anything more is needed in terms of details about
the system and I will gladly provided.
# uname -a
Linux 2.6.35-23-server #40-Ubuntu SMP x86_64 GNU/Linux
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz
stepping : 11
cpu MHz : 800.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
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 pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dts tpr_shadow vnmi flexpriority
bogomips : 4788.90
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz
stepping : 11
cpu MHz : 800.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 10
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 pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dts tpr_shadow vnmi flexpriority
bogomips : 4791.02
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
# cat /proc/interrupts
CPU0 CPU1
0: 2278570 1 IO-APIC-edge timer
1: 7805 186 IO-APIC-edge i8042
8: 1 0 IO-APIC-edge rtc0
9: 34270 0 IO-APIC-fasteoi acpi
12: 2759224 38989 IO-APIC-edge i8042
14: 65199 0 IO-APIC-edge ata_piix
15: 0 0 IO-APIC-edge ata_piix
16: 13302 0 IO-APIC-fasteoi uhci_hcd:usb3, nvidia
18: 283 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb7
19: 0 0 IO-APIC-fasteoi uhci_hcd:usb6
20: 2 1 IO-APIC-fasteoi firewire_ohci
21: 0 0 IO-APIC-fasteoi uhci_hcd:usb4, r852, mmc0
23: 23 4 IO-APIC-fasteoi ehci_hcd:usb2, uhci_hcd:usb5
44: 52 133 PCI-MSI-edge eth0
45: 127186 0 PCI-MSI-edge ahci
46: 273211 0 PCI-MSI-edge iwlagn
47: 514 0 PCI-MSI-edge hda_intel
NMI: 0 0 Non-maskable interrupts
LOC: 184938 1121100 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 0 0 Performance monitoring interrupts
PND: 8 0 Performance pending work
RES: 92722 140705 Rescheduling interrupts
CAL: 5587 4758 Function call interrupts
TLB: 13868 15727 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 45 44 Machine check polls
ERR: 3
MIS: 0
--
Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core 2 Duo even with only 1 core enabled
https://bugs.launchpad.net/bugs/524281
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