[dpdk-users] Link status?

[dpdk-users] Link status?

[Jason Lixfeld]

Hi,

I’m messing around with MoonGen and trying to simplify some basic diagnostics before calling whatever MoonGen script I wanted to call.  Right now, I’m trying to find a way to report back the status of a link to see if it’s up so that I know whether or not it can be used as a tx or rx interface for whatever MoonGen script I want to run.

Is there an easy way to do that with an existing dpdk application, or does one need to be an super uber programmer type (which I am not anywhere close to being :)) and write some application to be able to do that?

Not sure if it matters, but I’m using an Intel 82599 6 port SFP+. I’m using v2.2.0 (I think?  Whatever the version is that is retrieved from git when I build MoonGen), Debian 8.4.

Sorry for sounding dumb.  I’m not a programmer in the least :(

Thanks in advance!

Re: [dpdk-users] Link status?

[Gadre Nayan]

There is a patch available for link status change on a kni interface. It
will send netlink message from the kni driver.
On 25 May 2016 9:45 p.m., "Jason Lixfeld" <jason-dpdk@lixfeld.ca> wrote:

> Hi,
>
> I’m messing around with MoonGen and trying to simplify some basic
> diagnostics before calling whatever MoonGen script I wanted to call.  Right
> now, I’m trying to find a way to report back the status of a link to see if
> it’s up so that I know whether or not it can be used as a tx or rx
> interface for whatever MoonGen script I want to run.
>
> Is there an easy way to do that with an existing dpdk application, or does
> one need to be an super uber programmer type (which I am not anywhere close
> to being :)) and write some application to be able to do that?
>
> Not sure if it matters, but I’m using an Intel 82599 6 port SFP+. I’m
> using v2.2.0 (I think?  Whatever the version is that is retrieved from git
> when I build MoonGen), Debian 8.4.
>
> Sorry for sounding dumb.  I’m not a programmer in the least :(
>
> Thanks in advance!

Re: [dpdk-users] Link status?

[Jason Lixfeld]

It sounds like that will only tell me if link status changes, not what the current link status is?

> On May 25, 2016, at 12:29 PM, Gadre Nayan <gadrenayan@gmail.com> wrote:
> 
> There is a patch available for link status change on a kni interface. It will send netlink message from the kni driver.
> 
> On 25 May 2016 9:45 p.m., "Jason Lixfeld" <jason-dpdk@lixfeld.ca> wrote:
> Hi,
> 
> I’m messing around with MoonGen and trying to simplify some basic diagnostics before calling whatever MoonGen script I wanted to call.  Right now, I’m trying to find a way to report back the status of a link to see if it’s up so that I know whether or not it can be used as a tx or rx interface for whatever MoonGen script I want to run.
> 
> Is there an easy way to do that with an existing dpdk application, or does one need to be an super uber programmer type (which I am not anywhere close to being :)) and write some application to be able to do that?
> 
> Not sure if it matters, but I’m using an Intel 82599 6 port SFP+. I’m using v2.2.0 (I think?  Whatever the version is that is retrieved from git when I build MoonGen), Debian 8.4.
> 
> Sorry for sounding dumb.  I’m not a programmer in the least :(
> 
> Thanks in advance!

Re: [dpdk-users] Link status?

[Thomas Monjalon]

2016-05-25 12:14, Jason Lixfeld:
> Is there an easy way to do that with an existing dpdk application, or does one need to be an super uber programmer type (which I am not anywhere close to being :)) and write some application to be able to do that?

Yes you need to access to a variable inside the application to know that.
You can have a secondary application which looks into the primary one.
You can try to write one or check these apps:
	app/proc_info (stats but no link status yet)
	examples/ethtool/ethtool-app/ (more complicate than a secondary app)