asterisk users - Jul 2011 - New VirtualBox Beta Has PCI Pass-Through Support

Can you say a Virtualized Asterisk with a PRI card!

http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ

Doug

-- 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither Liberty nor Safety."

On Fri, Jul 8, 2011 at 7:28 PM, Doug Lytle <support at drdos.info> wrote:
> Can you say a Virtualized Asterisk with a PRI card!
>
>
http://www.phoronix.com/scan.**php?page=news_item&px=OTY0OQ<http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ>
>
> Doug
>
> --
> Ben Franklin quote:
>
> "Those who would give up Essential Liberty to purchase a little
Temporary
> Safety, deserve neither Liberty nor Safety."
>
>
Source code?
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On 07/09/2011 01:28 AM, Doug Lytle wrote:
> Can you say a Virtualized Asterisk with a PRI card!
>
> http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ
With virtualized environments prone to timing issues does this make 
sense at all?

Regards,
Patrick

Steve Totaro wrote:
> Source code? 

http://download.virtualbox.org/virtualbox/4.1.0_BETA2/VirtualBox-4.1.0_BETA2.tar.bz2

Doug


-- 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither Liberty nor Safety."

On Fri, Jul 8, 2011 at 6:28 PM, Doug Lytle <support at drdos.info>
wrote:
> Can you say a Virtualized Asterisk with a PRI card!
>
> http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ
>
> Doug
Not trying to start a war here, but I thought Xen VM server has been
able to do this for a while now?

-- 
Thanks,
--Warren Selby, dCAP
http://www.SelbyTech.com

Warren Selby wrote:
> Not trying to start a war here,

That may be, but I have experience with VB.

Doug


-- 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither Liberty nor Safety."

+1 for Xen
-1 for VB


Sent from my iPhone

On Jul 8, 2011, at 10:00 PM, Doug Lytle <support at drdos.info> wrote:
> Warren Selby wrote:
>> Not trying to start a war here,
> 
> 
> That may be, but I have experience with VB.
> 
> Doug
> 
> 
> -- 
> Ben Franklin quote:
> 
> "Those who would give up Essential Liberty to purchase a little
Temporary Safety, deserve neither Liberty nor Safety."
> 
> 
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
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On Fri, Jul 8, 2011 at 9:00 PM, Doug Lytle <support at drdos.info>
wrote:
> Warren Selby wrote:
>>
>> Not trying to start a war here,
>
>
> That may be, but I have experience with VB.
>
> Doug

I use VB on my main desktop that runs windows in order to setup test
environments, so I understand.  :)

-- 
Thanks,
--Warren Selby, dCAP
http://www.SelbyTech.com

2011/7/9 Doug Lytle <support at drdos.info>
> Can you say a Virtualized Asterisk with a PRI card!
>
>
http://www.phoronix.com/scan.**php?page=news_item&px=OTY0OQ<http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ>
>
> Doug
>
> --
> Ben Franklin quote:
>
> "Those who would give up Essential Liberty to purchase a little
Temporary
> Safety, deserve neither Liberty nor Safety."
>
>
> --
> ______________________________**______________________________**_________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>              http://www.asterisk.org/hello
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
> 
http://lists.digium.com/**mailman/listinfo/asterisk-**users<http://lists.digium.com/mailman/listinfo/asterisk-users>
>
Great news !
Thanks for sharing !
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Hi, just in case had someone tested a similiar setup with VM on KVM  ?

Luca

On 09/07/2011 01:28, Doug Lytle wrote:
> Can you say a Virtualized Asterisk with a PRI card!
>
> http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ
>
> Doug
>

On Fri, Jul 08, 2011 at 07:28:39PM -0400, Doug Lytle
wrote:
> Can you say a Virtualized Asterisk with a PRI card!
>
> http://www.phoronix.com/scan.php?page=news_item&px=OTY0OQ
I'm not sure this is relevant to your everyday PRI card.

Simple pass-through of PCI is rather simple to implement. It has been
implemented for quite some time in e.g. qemu, IIRC.

But there's one important feature that is tricky to implement: DMA.
DMA allows a PCI card to basically free access to the memory of the
system, without the CPU getting in the middle. Emulating this with the
host CPU in the middle will work, but is exepnsive. But the host does
not want to give the guest free access to the host's memory.

The solution: IOMMU: http://en.wikipedia.org/wiki/Iommu .
The CPU of the system has a Memory Management Unit (MMU) that
maps virtual address spaces to processes. Likewise we know prevent the
IO card from seeing physical addresses. Rather, it sees virtual
addresses mapped by the IOMMU. Just like the operating system maps
addresses for processes, the hypervisor maps address ranger to IO cards.

See also the link in that Phoronix article:
http://www.ibm.com/developerworks/linux/library/l-pci-passthrough/

I'm not well familiar with the relevant hardware, but I believe that not
only not every CPU supports this, but many (most?) PCI cards don't
support IOMMU.

-- 
               Tzafrir Cohen
icq#16849755              jabber:tzafrir.cohen at xorcom.com
+972-50-7952406           mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com  iax:guest at local.xorcom.com/tzafrir

On Sun, Jul 10, 2011 at 04:11, Tzafrir Cohen <tzafrir.cohen at xorcom.com>
wrote:
>
>
> The solution: IOMMU: http://en.wikipedia.org/wiki/Iommu .
> The CPU of the system has a Memory Management Unit (MMU) that
> maps virtual address spaces to processes. Likewise we know prevent the
> IO card from seeing physical addresses. Rather, it sees virtual
> addresses mapped by the IOMMU. Just like the operating system maps
> addresses for processes, the hypervisor maps address ranger to I
My understanding is PCI passthrough is supported on VMWare ESXi with
the proper hardware support.