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SubjectRe: cpu load balancing problem on smp
Arjan van de Ven wrote:
> Pablo Sebastian Greco wrote:
>
>> 2296: 427 426 436 134563009 PCI-MSI-edge
>> eth1
>> 2297: 252 252 135926471 257 PCI-MSI-edge
>> eth0
>
> this suggests that cores would be busy rather than only one....
> -
Yes, but you are looking at mm kernel statistics, but if you look at the
standard kernel, you'll see that eth interrupts are on the same core
according to attached /proc/cpuinfo.
OTOH, take a look at timer interrupt distribution
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Xeon(TM) CPU 2.66GHz
stepping : 4
cpu MHz : 2656.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 6
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
bogomips : 5324.82
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Xeon(TM) CPU 2.66GHz
stepping : 4
cpu MHz : 2656.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 6
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
bogomips : 5320.06
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Xeon(TM) CPU 2.66GHz
stepping : 4
cpu MHz : 2656.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 6
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
bogomips : 5320.20
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Xeon(TM) CPU 2.66GHz
stepping : 4
cpu MHz : 2656.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 6
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
bogomips : 5320.16
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
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