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Re: irqbalance in fedora15

From: Gilboa Davara <gilboad_at_nospam>
Date: Sat Oct 29 2011 - 20:06:02 GMT
To: Community support for Fedora users <users@lists.fedoraproject.org>

Actually, in my experience you'd want each device (or actually each irq -
especially in the case of multi-queue device) to fall squarely on one CPU
core by manually setting the irq_affinity.

I place very little faith on automated irq balancing.

- Gilboa

On Saturday, October 29, 2011, Benjamin <benjo11111@gmail.com> wrote:
> Hi,
>
> I want to configure irqbalance on both cpus.I have 2 lan interface one is
wan and second is lan , currently i have 2 cpu and wan is falling on cpu0
and lan is also falling on cpu0.And now i want to set both interface should
be fall on both cpus.
>
> How to do it?
>
> cat /proc/cpuinfo
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 6
> model : 23
> model name : Intel(R) Core(TM)2 CPU E7500 @ 2.93GHz
> stepping : 10
> cpu MHz : 2933.727
> cache size : 3072 KB
> physical id : 0
> siblings : 2
> core id : 0
> cpu cores : 2
> apicid : 0
> initial apicid : 0
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> 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 nx lm
constant_tsc arch_perfmon pebs bts aperfmperf pni monitor tm2 ssse3 lahf_lm
dts
> bogomips : 5867.45
> 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 : 23
> model name : Intel(R) Core(TM)2 CPU E7500 @ 2.93GHz
> stepping : 10
> cpu MHz : 2933.727
> cache size : 3072 KB
> physical id : 0
> siblings : 2
> core id : 1
> cpu cores : 2
> apicid : 1
> initial apicid : 1
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> 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 nx lm
constant_tsc arch_perfmon pebs bts aperfmperf pni monitor tm2 ssse3 lahf_lm
dts
> bogomips : 5866.47
> clflush size : 64
> cache_alignment : 64
> address sizes : 36 bits physical, 48 bits virtual
> power management:
>
>
> cat /proc/interrupts
> CPU0 CPU1
> 0: 258 743 IO-APIC-edge timer
> 1: 653 651 IO-APIC-edge i8042
> 8: 1798940 2243825 IO-APIC-edge rtc0
> 9: 0 0 IO-APIC-fasteoi acpi
> 12: 5479 68 IO-APIC-edge i8042
> 14: 0 0 IO-APIC-edge ata_piix
> 15: 0 0 IO-APIC-edge ata_piix
> 16: 0 0 IO-APIC-fasteoi uhci_hcd:usb5
> 18: 0 0 IO-APIC-fasteoi uhci_hcd:usb4
> 19: 465089 466793 IO-APIC-fasteoi ata_piix, uhci_hcd:usb3
> 21: 8153 2619593 IO-APIC-fasteoi p2p1
> 23: 0 0 IO-APIC-fasteoi ehci_hcd:usb1,
uhci_hcd:usb2
> 40: 0 0 PCI-MSI-edge PCIe PME
> 41: 0 0 PCI-MSI-edge PCIe PME, pciehp
> 42: 0 0 PCI-MSI-edge PCIe PME, pciehp
> 43: 138 330 PCI-MSI-edge i915
> 44: 7261040 445 PCI-MSI-edge p10p1
> 45: 143 147 PCI-MSI-edge hda_intel
> NMI: 876 739 Non-maskable interrupts
> LOC: 5102916 3854827 Local timer interrupts
> SPU: 0 0 Spurious interrupts
> PMI: 876 739 Performance monitoring interrupts
> IWI: 0 0 IRQ work interrupts
> RES: 5645 5530 Rescheduling interrupts
> CAL: 1424 1909 Function call interrupts
> TLB: 24029 20181 TLB shootdowns
> TRM: 0 0 Thermal event interrupts
> THR: 0 0 Threshold APIC interrupts
> MCE: 0 0 Machine check exceptions
> MCP: 883 883 Machine check polls
> ERR: 1
> MIS: 0
>
> Regards,
> Benjamin
>
>

-- Sent from my Samsung Galaxy S2

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