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Groups > linux.kernel > #1407966
| From | Paolo Bonzini <pbonzini@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers |
| Date | 2016-05-27 11:50 +0200 |
| Message-ID | <rDmyZ-1JJ-9@gated-at.bofh.it> (permalink) |
| References | <rCx3s-3y6-3@gated-at.bofh.it> <rD0Ia-5eg-25@gated-at.bofh.it> <rDaoa-2BP-21@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 26/05/2016 22:33, yunhong jiang wrote: > On Thu, 26 May 2016 12:26:27 +0200 > Paolo Bonzini <pbonzini@redhat.com> wrote: > >> >> >> On 25/05/2016 04:47, Wanpeng Li wrote: >>> From: Wanpeng Li <wanpeng.li@hotmail.com> >>> >>> 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
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[PATCH v5] KVM: halt-polling: poll for the upcoming fire timers Wanpeng Li <kernellwp@gmail.com> - 2016-05-25 04:50 +0200
Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers Paolo Bonzini <pbonzini@redhat.com> - 2016-05-26 12:30 +0200
Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers Paolo Bonzini <pbonzini@redhat.com> - 2016-05-26 12:40 +0200
Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers Wanpeng Li <kernellwp@gmail.com> - 2016-05-26 13:30 +0200
Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers yunhong jiang <yunhong.jiang@linux.intel.com> - 2016-05-26 22:50 +0200
Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers Paolo Bonzini <pbonzini@redhat.com> - 2016-05-27 11:50 +0200
Re: [PATCH v5] KVM: halt-polling: poll for the upcoming fire timers yunhong jiang <yunhong.jiang@linux.intel.com> - 2016-05-28 02:30 +0200
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