On 12/02/15 09:24, zhangtrump wrote: > Hi, all: > > I was testing networking performance from DomU to DomU running on > different hosts. I used xentrace and xenalyze tools to get the trace > info of receive side, and found that there was a time when vcpus > (which handle the receive work) were in "Blocked" state. > From the information of "VMExit" reason gotten by xenalyze tool, > the "HLT" is the main exit reason. I am wondering when DomU will be > exited because of "HLT"? > Thanks.
Yes. When one vcpu halts, Xen will schedule another vcpu in its place. There is nothing to be gained at all by letting a pcpu stay halted in guest. ~Andrew
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