Re: Assistance with DPDK on Windows

Re: Assistance with DPDK on Windows

[Thenveer Poolakkanni]

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Hi Team,
I have successfully compiled and built DPDK on a Windows system and am using a custom driver in conjunction with DPDK. I am able to write to the registers, and the driver can also read from them. Additionally, I have successfully loaded the netuio driver onto my network interfaces (01:00.0 and 01:00.1).
However, when running the DPDK application, I encounter the following error: "Invalid memory, No probed Ethernet devices." The issue is detailed further in the screenshot below.

[cid:94365efe-78e5-4ef2-9d9a-b49188e35759]
Could you please assist in identifying the cause of this error and advise on potential steps to resolve it?
Thank you in advance for your support.
Best regards,
Thenveer

________________________________
From: Thomas Monjalon <thomas@monjalon.net>
Sent: Wednesday, November 5, 2025 3:55 PM
To: andremue@linux.microsoft.com <andremue@linux.microsoft.com>; Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: Thenveer Poolakkanni <thenveer.poolakkanni@iwave-global.com>; dev@dpdk.org <dev@dpdk.org>; Chaturbhuja Nath Prabhu <c.prabhu@iwave-global.com>; Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com>
Subject: Re: Assistance with DPDK on Windows

05/11/2025 08:36, Dmitry Kozlyuk:
> Hi Thenveer,
>
>
> On 11/5/25 10:18, Thenveer Poolakkanni wrote:
> > 1. Is it possible to execute or use dpdk-devbind.py on Windows to
> > verify the device binding status?
>
> No. Please use Device Manager for now.
>
> > 2. On Windows, the build generates .dll files (e.g.,
> > rte_net_driver.dll) instead of .so files (e.g., librte_net_driver.so
> > in Linux). How can we use or execute these .dll files in the same way
> > we use .so files when running DPDK applications?
> >
> The application must link the needed libraries and PMDs when building.
> These files must be in PATH or in the working directory when running the
> application. Loading additional PMDs with "-d" EAL option is not yet
> implemented. If you have a custom PMD you have to build it as a part of
> DPDK and link to your application.
>
>
> P. S. Questions like these belong to users@dpdk.org. Keeping in dev@ to
> avoid breaking threads.

This question is probably showing a lack of documentation.
Please can we have this gap solved with a patch?



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Re: Assistance with DPDK on Windows

[Thenveer Poolakkanni]

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Hi Team,
Just a quick reminder regarding my earlier email about the DPDK issue on Windows .
Could you please advise on the cause and possible fix?
Thanks,
Thenveer

________________________________
From: Thenveer Poolakkanni <thenveer.poolakkanni@iwave-global.com>
Sent: Friday, November 14, 2025 3:42 PM
To: Thomas Monjalon <thomas@monjalon.net>; andremue@linux.microsoft.com <andremue@linux.microsoft.com>; Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: dev@dpdk.org <dev@dpdk.org>; Chaturbhuja Nath Prabhu <c.prabhu@iwave-global.com>; Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com>; users@dpdk.org <users@dpdk.org>
Subject: Re: Assistance with DPDK on Windows

Hi Team,
I have successfully compiled and built DPDK on a Windows system and am using a custom driver in conjunction with DPDK. I am able to write to the registers, and the driver can also read from them. Additionally, I have successfully loaded the netuio driver onto my network interfaces (01:00.0 and 01:00.1).
However, when running the DPDK application, I encounter the following error: "Invalid memory, No probed Ethernet devices." The issue is detailed further in the screenshot below.

[cid:94365efe-78e5-4ef2-9d9a-b49188e35759]
Could you please assist in identifying the cause of this error and advise on potential steps to resolve it?
Thank you in advance for your support.
Best regards,
Thenveer

________________________________
From: Thomas Monjalon <thomas@monjalon.net>
Sent: Wednesday, November 5, 2025 3:55 PM
To: andremue@linux.microsoft.com <andremue@linux.microsoft.com>; Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: Thenveer Poolakkanni <thenveer.poolakkanni@iwave-global.com>; dev@dpdk.org <dev@dpdk.org>; Chaturbhuja Nath Prabhu <c.prabhu@iwave-global.com>; Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com>
Subject: Re: Assistance with DPDK on Windows

05/11/2025 08:36, Dmitry Kozlyuk:
> Hi Thenveer,
>
>
> On 11/5/25 10:18, Thenveer Poolakkanni wrote:
> > 1. Is it possible to execute or use dpdk-devbind.py on Windows to
> > verify the device binding status?
>
> No. Please use Device Manager for now.
>
> > 2. On Windows, the build generates .dll files (e.g.,
> > rte_net_driver.dll) instead of .so files (e.g., librte_net_driver.so
> > in Linux). How can we use or execute these .dll files in the same way
> > we use .so files when running DPDK applications?
> >
> The application must link the needed libraries and PMDs when building.
> These files must be in PATH or in the working directory when running the
> application. Loading additional PMDs with "-d" EAL option is not yet
> implemented. If you have a custom PMD you have to build it as a part of
> DPDK and link to your application.
>
>
> P. S. Questions like these belong to users@dpdk.org. Keeping in dev@ to
> avoid breaking threads.

This question is probably showing a lack of documentation.
Please can we have this gap solved with a patch?



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Re: Assistance with DPDK on Windows

[Thenveer Poolakkanni]

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Hi Team,
Additionally, I have one more query: how do I use the virt2phys driver when I have two network interfaces already bound to netuio?
Thanks,
Thenveer

________________________________
From: Thenveer Poolakkanni <thenveer.poolakkanni@iwave-global.com>
Sent: Monday, December 1, 2025 11:25 AM
To: Thomas Monjalon <thomas@monjalon.net>; andremue@linux.microsoft.com <andremue@linux.microsoft.com>; Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: dev@dpdk.org <dev@dpdk.org>; Chaturbhuja Nath Prabhu <c.prabhu@iwave-global.com>; Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com>; users@dpdk.org <users@dpdk.org>
Subject: Re: Assistance with DPDK on Windows

Hi Team,
Just a quick reminder regarding my earlier email about the DPDK issue on Windows .
Could you please advise on the cause and possible fix?
Thanks,
Thenveer

________________________________
From: Thenveer Poolakkanni <thenveer.poolakkanni@iwave-global.com>
Sent: Friday, November 14, 2025 3:42 PM
To: Thomas Monjalon <thomas@monjalon.net>; andremue@linux.microsoft.com <andremue@linux.microsoft.com>; Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: dev@dpdk.org <dev@dpdk.org>; Chaturbhuja Nath Prabhu <c.prabhu@iwave-global.com>; Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com>; users@dpdk.org <users@dpdk.org>
Subject: Re: Assistance with DPDK on Windows

Hi Team,
I have successfully compiled and built DPDK on a Windows system and am using a custom driver in conjunction with DPDK. I am able to write to the registers, and the driver can also read from them. Additionally, I have successfully loaded the netuio driver onto my network interfaces (01:00.0 and 01:00.1).
However, when running the DPDK application, I encounter the following error: "Invalid memory, No probed Ethernet devices." The issue is detailed further in the screenshot below.

[cid:94365efe-78e5-4ef2-9d9a-b49188e35759]
Could you please assist in identifying the cause of this error and advise on potential steps to resolve it?
Thank you in advance for your support.
Best regards,
Thenveer

________________________________
From: Thomas Monjalon <thomas@monjalon.net>
Sent: Wednesday, November 5, 2025 3:55 PM
To: andremue@linux.microsoft.com <andremue@linux.microsoft.com>; Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: Thenveer Poolakkanni <thenveer.poolakkanni@iwave-global.com>; dev@dpdk.org <dev@dpdk.org>; Chaturbhuja Nath Prabhu <c.prabhu@iwave-global.com>; Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com>
Subject: Re: Assistance with DPDK on Windows

05/11/2025 08:36, Dmitry Kozlyuk:
> Hi Thenveer,
>
>
> On 11/5/25 10:18, Thenveer Poolakkanni wrote:
> > 1. Is it possible to execute or use dpdk-devbind.py on Windows to
> > verify the device binding status?
>
> No. Please use Device Manager for now.
>
> > 2. On Windows, the build generates .dll files (e.g.,
> > rte_net_driver.dll) instead of .so files (e.g., librte_net_driver.so
> > in Linux). How can we use or execute these .dll files in the same way
> > we use .so files when running DPDK applications?
> >
> The application must link the needed libraries and PMDs when building.
> These files must be in PATH or in the working directory when running the
> application. Loading additional PMDs with "-d" EAL option is not yet
> implemented. If you have a custom PMD you have to build it as a part of
> DPDK and link to your application.
>
>
> P. S. Questions like these belong to users@dpdk.org. Keeping in dev@ to
> avoid breaking threads.

This question is probably showing a lack of documentation.
Please can we have this gap solved with a patch?



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Re: Assistance with DPDK on Windows

[Dmitry Kozlyuk]

Hi Thenveer,


virt2phys does not conflict with netuio, because virt2phys does not bind 
to any NIC.

It is just loaded into the kernel for DPDK to make IOCTLs to get 
physical addresses.

There are specific instruction for loading virt2phys:

https://git.dpdk.org/dpdk-kmods/tree/windows/README.rst


On 12/1/25 12:13, Thenveer Poolakkanni wrote:
> Hi Team,
> Additionally, I have one more query: how do I use the 
> *virt2phys* driver when I have two network interfaces already bound to 
> *netuio*?
> Thanks,
> Thenveer