From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
To: Avi Kivity <avi@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marcelo Tosatti <mtosatti@redhat.com>,
Ingo Molnar <mingo@redhat.com>, Rik van Riel <riel@redhat.com>,
Srikar <srikar@linux.vnet.ibm.com>,
S390 <linux-s390@vger.kernel.org>,
Carsten Otte <cotte@de.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
KVM <kvm@vger.kernel.org>, chegu vinod <chegu_vinod@hp.com>,
"Andrew M. Theurer" <habanero@linux.vnet.ibm.com>,
LKML <linux-kernel@vger.kernel.org>, X86 <x86@kernel.org>,
Gleb Natapov <gleb@redhat.com>,
linux390@de.ibm.com,
Srivatsa Vaddagiri <srivatsa.vaddagiri@gmail.com>,
Joerg Roedel <joerg.roedel@amd.com>
Subject: Re: [PATCH RFC V4 2/3] kvm: Note down when cpu relax intercepted or pause loop exited
Date: Tue, 17 Jul 2012 14:01:48 +0530 [thread overview]
Message-ID: <500522F4.7090601@linux.vnet.ibm.com> (raw)
In-Reply-To: <500520A8.50106@redhat.com>
On 07/17/2012 01:52 PM, Avi Kivity wrote:
> On 07/16/2012 08:24 PM, Raghavendra K T wrote:
>> So are you saying allow vcpu to spin in non over-commit scenarios? So
>> that we avoid all yield_to etc...
>>
>> ( Or even in some other place where it is useful).
>
> When is yielding useful, if you're not overcommitted?
>
Right. There is no need to do yield_to when run queue has only one task.
next prev parent reply other threads:[~2012-07-17 8:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-16 8:24 [PATCH RFC V4 0/3] kvm: Improving directed yield in PLE handler Raghavendra K T
2012-07-16 8:25 ` [PATCH RFC V4 1/3] kvm/config: Add config to support ple or cpu relax optimzation Raghavendra K T
2012-07-16 8:25 ` [PATCH RFC V4 2/3] kvm: Note down when cpu relax intercepted or pause loop exited Raghavendra K T
2012-07-16 10:01 ` Avi Kivity
2012-07-16 17:24 ` Raghavendra K T
2012-07-17 8:22 ` Avi Kivity
2012-07-17 8:31 ` Raghavendra K T [this message]
2012-07-16 8:25 ` [PATCH RFC V4 3/3] kvm: Choose better candidate for directed yield Raghavendra K T
2012-07-16 10:07 ` Avi Kivity
2012-07-16 16:10 ` Rik van Riel
2012-07-16 17:07 ` Raghavendra K T
2012-07-17 8:29 ` Avi Kivity
2012-07-17 9:09 ` Raghavendra K T
2012-07-18 2:28 ` Raghavendra K T
2012-07-16 17:49 ` Raghavendra K T
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