irqbalance in fedora15

[Gilboa Davara]

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 at 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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