[PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Xu, Dongxiao]

Send the patches in attachment. 

One of the VNIF driver's scalability issues is the high event
channel frequency. It's highly related to physical NIC's interrupt
frequency in dom0, which could be 20K HZ in some situation. The
high frequency event channel notification makes the guest and dom0
CPU utilization at a high value, especially in multi-VM cases.
The following two patches uses smart polling mechanism to
replace event notification to reduce the CPU Utilization.

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>

Best Regards,
-- Dongxiao
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Re: [PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Jeremy Fitzhardinge]

On 09/30/09 17:11, Xu, Dongxiao wrote:
> Send the patches in attachment. 
>
> One of the VNIF driver's scalability issues is the high event
> channel frequency. It's highly related to physical NIC's interrupt
> frequency in dom0, which could be 20K HZ in some situation. The
> high frequency event channel notification makes the guest and dom0
> CPU utilization at a high value, especially in multi-VM cases.
> The following two patches uses smart polling mechanism to
> replace event notification to reduce the CPU Utilization.
>   

Thanks, applied.  I fixed up some whitespace issues; please run kernel
patches through scripts/checkpatch.pl before submission.

    J

[PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Xu, Dongxiao]

Resend the patch and CC Jeremy.

One of the VNIF driver's scalability issues is the high event
channel frequency. It's highly related to physical NIC's interrupt
frequency in dom0, which could be 20K HZ in some situation. The
high frequency event channel notification makes the guest and dom0
CPU utilization at a high value, especially in multi-VM cases. 
The following two patches uses smart polling mechanism to 
replace event notification to reduce the CPU Utilization. 

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
 
Best Regards, 
-- Dongxiao

Re: [PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Jeremy Fitzhardinge]

On 09/30/09 11:17, Xu, Dongxiao wrote:
> Resend the patch and CC Jeremy.
>
> One of the VNIF driver's scalability issues is the high event
> channel frequency. It's highly related to physical NIC's interrupt
> frequency in dom0, which could be 20K HZ in some situation. The
> high frequency event channel notification makes the guest and dom0
> CPU utilization at a high value, especially in multi-VM cases. 
> The following two patches uses smart polling mechanism to 
> replace event notification to reduce the CPU Utilization. 
>
> Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
>   

I'm having difficulty applying these because they're in quoted-printable
MIME format.  Could you resend them as attachments?

Thanks,
    J

[PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Xu, Dongxiao]

One of the VNIF driver's scalability issues is the high event
channel frequency. It's highly related to physical NIC's interrupt
frequency in dom0, which could be 20K HZ in some situation. The
high frequency event channel notification makes the guest and dom0
CPU utilization at a high value, especially in multi-VM cases. 
The following two patches uses smart polling mechanism to 
replace event notification to reduce the CPU Utilization. 

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
 
Best Regards, 
-- Dongxiao

Re: [PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Keir Fraser]

Are these patches against pv_ops? They don't apply to 2.6.18 so I assume so.
In which case you might want to Cc Jeremy as he manages the pv_ops tree. I
can't do anything with them. If you spin versions against 2.6.18 I will
apply them. And don't forget to patch xen-unstable's version of ring.h --
that's the 'master version' of that public header.

 -- Keir

On 30/09/2009 08:21, "Xu, Dongxiao" <dongxiao.xu@intel.com> wrote:

> One of the VNIF driver's scalability issues is the high event
> channel frequency. It's highly related to physical NIC's interrupt
> frequency in dom0, which could be 20K HZ in some situation. The
> high frequency event channel notification makes the guest and dom0
> CPU utilization at a high value, especially in multi-VM cases.
> The following two patches uses smart polling mechanism to
> replace event notification to reduce the CPU Utilization.
> 
> Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
>  
> Best Regards, 
> -- Dongxiao
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

RE: [PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

[Xu, Dongxiao]

Keir, 
    Thanks for reminder, currently this patch is for PV-ops tree. Later I will send out patch for xen-unstable's ring.h. 

Thanks!
Dongxiao

________________________________________
From: Keir Fraser [keir.fraser@eu.citrix.com]
Sent: Wednesday, September 30, 2009 12:54 AM
To: Xu, Dongxiao; xen-devel@lists.xensource.com
Subject: Re: [Xen-devel][PV-ops][PATCH 0/2] VNIF: Using smart polling instead of event notification.

Are these patches against pv_ops? They don't apply to 2.6.18 so I assume so.
In which case you might want to Cc Jeremy as he manages the pv_ops tree. I
can't do anything with them. If you spin versions against 2.6.18 I will
apply them. And don't forget to patch xen-unstable's version of ring.h --
that's the 'master version' of that public header.

 -- Keir

On 30/09/2009 08:21, "Xu, Dongxiao" <dongxiao.xu@intel.com> wrote:

> One of the VNIF driver's scalability issues is the high event
> channel frequency. It's highly related to physical NIC's interrupt
> frequency in dom0, which could be 20K HZ in some situation. The
> high frequency event channel notification makes the guest and dom0
> CPU utilization at a high value, especially in multi-VM cases.
> The following two patches uses smart polling mechanism to
> replace event notification to reduce the CPU Utilization.
>
> Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
>
> Best Regards,
> -- Dongxiao
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel