[Xen-devel] Interrrupts and IPIs?

["Apparao, Padmashree K" <padmashree.k.apparao@xxxxxxxxx>]

 

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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