Re: [dpdk-dev] Testing memnic for VM to VM transfer

[GongJinrong <jinronggong@hotmail.com>]

Thanks guys, I will try.

-----Original Message-----
From: Hiroshi Shimamoto [mailto:h-shimamoto@ct.jp.nec.com] 
Sent: Wednesday, June 18, 2014 8:06 PM
To: Thomas Monjalon; GongJinrong
Cc: dev@dpdk.org; 'John Joyce (joycej)'; Olivier MATZ
Subject: RE: [dpdk-dev] Testing memnic for VM to VM transfer

Hi,

> Subject: Re: [dpdk-dev] Testing memnic for VM to VM transfer
> 
> 2014-06-18 11:42, Hiroshi Shimamoto:
> > 2014-06-18 19:26, GongJinrong:
> > > Do you have any idea that how to write a host application to put 
> > > the data to guest memnic PMD?
> >
> > Yes, basically I made the MEMNIC interface work with DPDK vSwitch.
> >
> > By the way, you can mmap() the shm which specified as the ivshmem 
> > and put the proper data to send a packet to guest PMD.
> > I don't have time to make proper code, but can advise you; please 
> > see common/memnic.h and the memory layout.
> > 1) Set magic and version in header on host.
> > 2) Initialize PMD on guest.
> > 3) Check the reset is 1 and set valid to 1, reset to 0 on host.
> > 4) Use uplink area the default block size 4K.
> >    Set len and fill ether frame data, then set the status to 2 on host.
> >    Guest PMD may receive the packet.
> >    Proceed to the next packet block.
> 
> Such application should be integrated in memnic repository.
> I know Olivier wrote one which could be sent on next week.

yeah, I just begin to feel to need such a software in the repository.

thanks,
Hiroshi

> 
> --
> Thomas