On 26/05/2016 22:33, yunhong jiang wrote: > On Thu, 26 May 2016 12:26:27 +0200 > Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > >> >> >> On 25/05/2016 04:47, Wanpeng Li wrote: >>> From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx> >>> >>> If an emulated lapic timer will fire soon(in the scope of 10us the >>> base of dynamic halt-polling, lower-end of message passing workload >>> latency TCP_RR's poll time < 10us) we can treat it as a short halt, >>> and poll to wait it fire, the fire callback apic_timer_fn() will set >>> KVM_REQ_PENDING_TIMER, and this flag will be check during busy poll. >>> This can avoid context switch overhead and the latency which we wake >>> up vCPU. >> >> As discussed on IRC, I would like to understand why the adaptive > > Glad to know the IRC channel. Is #kvm channel on freenode the IRC you are > talking about? No, it's #qemu on irc.oftc.net. Thanks, Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
