From: Jerone Young <jyoung5@us.ibm.com>
To: Hollis Blanchard <hollisb@us.ibm.com>
Cc: kvm-ppc-devel@lists.sourceforge.net, kvm-devel@lists.sourceforge.net
Subject: Re: [kvm-ppc-devel] [kvm-devel] [PATCH 0 of 3] Fix guest
Date: Fri, 25 Apr 2008 16:34:54 +0000 [thread overview]
Message-ID: <1209141294.6383.3.camel@thinkpadL> (raw)
In-Reply-To: <200804250900.33331.hollisb@us.ibm.com>
On Fri, 2008-04-25 at 09:00 -0500, Hollis Blanchard wrote:
> On Friday 25 April 2008 00:56:01 Jerone Young wrote:
> > This set of patches fixes 100% CPU usage when a guest is idle on PowerPC.
> This time it uses common kvm functions to sleep the guest.
>
> Looking much better now, with just a few minor issues to correct. With these
> patches applied, about how much CPU *does* an idling guest consume?
With the current patch *as is* idle guest are eating about 16% CPU.
Better then 100%, but more then the other patch. I'll see if by removing
the vcpu_loads & vcpu_puts if that goes down.
>
> By the way, you don't explicitly *unset* MSR[WE]. I think this works
> implicitly because of the way we deliver interrupts; could you add a comment
> explaining that?
Yes it is unset implicity. I can add a comment on this.
>
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WARNING: multiple messages have this Message-ID (diff)
From: Jerone Young <jyoung5@us.ibm.com>
To: Hollis Blanchard <hollisb@us.ibm.com>
Cc: kvm-ppc-devel@lists.sourceforge.net, kvm-devel@lists.sourceforge.net
Subject: Re: [kvm-ppc-devel] [PATCH 0 of 3] Fix guest eating 100% cpu when guest is idle on PowerPC
Date: Fri, 25 Apr 2008 11:34:54 -0500 [thread overview]
Message-ID: <1209141294.6383.3.camel@thinkpadL> (raw)
In-Reply-To: <200804250900.33331.hollisb@us.ibm.com>
On Fri, 2008-04-25 at 09:00 -0500, Hollis Blanchard wrote:
> On Friday 25 April 2008 00:56:01 Jerone Young wrote:
> > This set of patches fixes 100% CPU usage when a guest is idle on PowerPC.
> This time it uses common kvm functions to sleep the guest.
>
> Looking much better now, with just a few minor issues to correct. With these
> patches applied, about how much CPU *does* an idling guest consume?
With the current patch *as is* idle guest are eating about 16% CPU.
Better then 100%, but more then the other patch. I'll see if by removing
the vcpu_loads & vcpu_puts if that goes down.
>
> By the way, you don't explicitly *unset* MSR[WE]. I think this works
> implicitly because of the way we deliver interrupts; could you add a comment
> explaining that?
Yes it is unset implicity. I can add a comment on this.
>
-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
Don't miss this year's exciting event. There's still time to save $100.
Use priority code J8TL2D2.
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next prev parent reply other threads:[~2008-04-25 16:34 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-25 5:56 [kvm-ppc-devel] [PATCH 0 of 3] Fix guest eating 100% cpu when guest Jerone Young
2008-04-25 5:56 ` [PATCH 0 of 3] Fix guest eating 100% cpu when guest is idle on PowerPC Jerone Young
2008-04-25 5:56 ` [kvm-ppc-devel] [PATCH 1 of 3] Add idle wait support for 44x Jerone Young
2008-04-25 5:56 ` [PATCH 1 of 3] Add idle wait support for 44x platforms Jerone Young
2008-04-25 5:56 ` [kvm-ppc-devel] [PATCH 2 of 3] Add PowerPC KVM guest wait handling Jerone Young
2008-04-25 5:56 ` [PATCH 2 of 3] Add PowerPC KVM guest wait handling support Jerone Young
2008-04-25 13:56 ` [kvm-ppc-devel] [PATCH 2 of 3] Add PowerPC KVM guest wait Hollis Blanchard
2008-04-25 13:56 ` [kvm-ppc-devel] [PATCH 2 of 3] Add PowerPC KVM guest wait handling support Hollis Blanchard
2008-04-25 5:56 ` [kvm-ppc-devel] [PATCH 3 of 3] Add premption handlers & properly Jerone Young
2008-04-25 5:56 ` [PATCH 3 of 3] Add premption handlers & properly wake sleeping guest Jerone Young
2008-04-25 13:52 ` [kvm-ppc-devel] [PATCH 3 of 3] Add premption handlers & Hollis Blanchard
2008-04-25 13:52 ` [kvm-ppc-devel] [PATCH 3 of 3] Add premption handlers & properly wake sleeping guest Hollis Blanchard
2008-04-25 14:00 ` [kvm-ppc-devel] [PATCH 0 of 3] Fix guest eating 100% cpu when Hollis Blanchard
2008-04-25 14:00 ` [kvm-ppc-devel] [PATCH 0 of 3] Fix guest eating 100% cpu when guest is idle on PowerPC Hollis Blanchard
2008-04-25 16:34 ` Jerone Young [this message]
2008-04-25 16:34 ` Jerone Young
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