Xen devel - Jul 2006 - Interrrupts and IPIs?

Hi all,

 

I have dom0 and a guest on the same cpu: cpu0. However, when I look at
interrupts and ipis (with Xenperf) I get the following. There is nothing
going on Cpu3 so why the high number of IPIs? I have done a reset of the
counters, but after I run my workload on the guest cpu3 IPIS go from 0
to 210276

 

(Dom- has only 1 cpu and xm vcpu-list shows the other 3 cpus in blocked
state. The guest has only 1 vcpu).

 

Also what does the counter PG_need_flush tlb flushes count?

 

Thanks

-          Padma

 

 

 

 

 	 
 

 

 

 

 

 	 
 

 

 

 

 

 	 
 

 

 

 

 

 	 
 

Total

Cpu0

Cpu1

Cpu2

Cpu3

interrupts

         785,388 

         770,386 

            5,001 

         5000 

5001     

ipis

         218,263 

7967

10

10

210276

	


 



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