Re: [dpdk-dev] No probed ethernet devices /DPDP 1.7.1 in Fedora 21

[Neil Horman <nhorman@tuxdriver.com>]

On Fri, Jan 09, 2015 at 05:20:31PM +0100, sothy shan wrote:
> According to your argument,
> 
> I compiled qemu in DPDK OVS as provided with command.
> 
> After that, I compiled as stated here.
> 
> cd DPDK                     # DPDK sub-directoryexport
> RTE_SDK=$(pwd)export RTE_TARGET="x86_64-ivshmem-linuxapp-gcc"
> make CONFIG_RTE_BUILD_COMBINE_LIBS=y CONFIG_RTE_BUILD_SHARED_LIB=y
> install T="$RTE_TARGET"
> 
> Then I try to run the command for testpmd. I got same error. Any idea
> where is the mistake? Thanks
> 
> DPDK 1.7.1 in Fedora 21. PLease see the error here
> 
> 
Did you run qemu and create an ivshmem device?  Thats why you needed qemu
support so that you could run it and have qemu create a network device that had
a ivshmem interface
Neil

> 
> 
> 
> [cubiq@localhost dpdk-1.7.1]$ sudo
> ./x86_64-ivshmem-linuxapp-gcc/app/testpmd -c7 -n3 -- -i --nb-cores=2
> --nb-ports=2
> EAL: Detected lcore 0 as core 0 on socket 0
> EAL: Detected lcore 1 as core 1 on socket 0
> EAL: Detected lcore 2 as core 2 on socket 0
> EAL: Detected lcore 3 as core 3 on socket 0
> EAL: Detected lcore 4 as core 0 on socket 0
> EAL: Detected lcore 5 as core 1 on socket 0
> EAL: Detected lcore 6 as core 2 on socket 0
> EAL: Detected lcore 7 as core 3 on socket 0
> EAL: Support maximum 64 logical core(s) by configuration.
> EAL: Detected 8 lcore(s)
> EAL: Searching for IVSHMEM devices...
> EAL: No IVSHMEM configuration found!
> EAL: Setting up memory...
> EAL: Ask a virtual area of 0x1800000 bytes
> EAL: Virtual area found at 0x7fbe51000000 (size = 0x1800000)
> EAL: Ask a virtual area of 0x1400000 bytes
> EAL: Virtual area found at 0x7fbe4fa00000 (size = 0x1400000)
> EAL: Ask a virtual area of 0x800000 bytes
> EAL: Virtual area found at 0x7fbe52a00000 (size = 0x800000)
> EAL: Ask a virtual area of 0x2000000 bytes
> EAL: Virtual area found at 0x7fbe4d800000 (size = 0x2000000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fbe4d200000 (size = 0x400000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fbe4cc00000 (size = 0x400000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fbe4c600000 (size = 0x400000)
> EAL: Ask a virtual area of 0x1c00000 bytes
> EAL: Virtual area found at 0x7fbe4a800000 (size = 0x1c00000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fbe4a200000 (size = 0x400000)
> EAL: Requesting 64 pages of size 2MB from socket 0
> EAL: TSC frequency is ~3691108 KHz
> EAL: Master core 0 is ready (tid=98377940)
> EAL: Core 2 is ready (tid=491fd700)
> EAL: Core 1 is ready (tid=499fe700)
> EAL: PCI device 0000:06:00.0 on NUMA socket 0
> EAL:   probe driver: 8086:154d rte_ixgbe_pmd
> EAL:   0000:06:00.0 not managed by VFIO driver, skipping
> EAL:   0000:06:00.0 not managed by UIO driver, skipping
> EAL: PCI device 0000:06:00.1 on NUMA socket 0
> EAL:   probe driver: 8086:154d rte_ixgbe_pmd
> EAL:   0000:06:00.1 not managed by VFIO driver, skipping
> EAL:   0000:06:00.1 not managed by UIO driver, skipping
> EAL: Error - exiting with code: 1
>   Cause: No probed ethernet devices - check that
> CONFIG_RTE_LIBRTE_IGB_PMD=y and that CONFIG_RTE_LIBRTE_EM_PMD=y and that
> CONFIG_RTE_LIBRTE_IXGBE_PMD=y in your configuration file
> 
> 
> 
> On Fri, Dec 26, 2014 at 3:37 PM, Neil Horman <nhorman@tuxdriver.com> wrote:
> 
> > On Fri, Dec 26, 2014 at 09:01:13AM +0100, sothy shan wrote:
> > > On Thu, Dec 25, 2014 at 6:08 PM, Neil Horman <nhorman@tuxdriver.com>
> > wrote:
> > >
> > > > On Thu, Dec 25, 2014 at 10:11:51AM +0100, sothy shan wrote:
> > > > > On Wed, Dec 24, 2014 at 4:04 PM, Neil Horman <nhorman@tuxdriver.com>
> > > > wrote:
> > > > >
> > > > > > On Wed, Dec 24, 2014 at 02:26:21PM +0100, sothy shan wrote:
> > > > > > > Hello!
> > > > > > >
> > > > > > > I am playing with DPDK 1.7.1 in Fedora.
> > > > > > >
> > > > > > > When I do like this:
> > > > > > >
> > > > > > > export RTE_SDK=$(pwd)export
> > RTE_TARGET="x86_64-ivshmem-linuxapp-gcc"
> > > > > > > make install T="$RTE_TARGET"
> > > > > > >
> > > > > > > It worked. Means Testpmd is running.
> > > > > > >
> > > > > > > When I run as mentioned below:
> > > > > > >
> > > > > > > make CONFIG_RTE_BUILD_SHARED_LIB=y  install T="$RTE_TARGET"
> > > > > > >
> > > > > > > Build is sucess. But Testpmd gives error.
> > > > > > >
> > > > > > > Error is :
> > > > > > >
> > > > > > The dpdk ivshmem build assumes the presence of ivshmem devices as
> > > > plumbed
> > > > > > by
> > > > > > qemu virtual guests.  If you don't have a qemu guest running dpdk
> > won't
> > > > > > find any
> > > > > > shared memory devices, which is exactly what you are seeing.  That
> > > > said,
> > > > > > even if
> > > > > > you are running qemu guests, IIRC Fedora doesn't enable ivshmem
> > because
> > > > > > the code
> > > > > > has some security and behavioral issues still I think.  You'll
> > need to
> > > > > > rebuild
> > > > > > qemu to add support for it.
> > > > > >
> > > > >
> > > > > My understanding is that It is problem of enabling
> > > > > CONFIG_RTE_BUILD_SHARED_LIB=y in make command, I am able to build
> > target
> > > > of
> > > > > x86_64-ivshmem-linuxapp-gcc alone without shared_lib flag. I suspect
> > an
> > > > > error because of shared lib flag.
> > > > >
> > > > What exactly do you think that problem is?  You just said in your
> > > > origional note that you are able to build the sdk and test apps without
> > > > issue
> > > > (with or without building them as DSO's).  The problem comes in when
> > you
> > > > run
> > > > the app, and I expect you get the same error with both static and
> > dynamic
> > > > builds.
> > > >
> > > > The problem seems obvious to me.  DPDK cannot find any ivshmem devices
> > on
> > > > your
> > > > system when it loads (look at the code in rte_eal_ivshmem_init).  The
> > error
> > > > message you see gets output if you don't generate an ivshmem_config,
> > which
> > > > happens (among a few other reasons), if you don't have any ivshmem
> > devices
> > > > created on your system
> > > >
> > > > Neil
> > > >
> > >
> > >
> > > Do you have any hints for these messsages?
> > >
> > Yes, I gave you direction in my last note, its the fact that no ivshmem
> > devices
> > were found.
> >
> > > EAL: Error - exiting with code: 1
> > >   Cause: No probed ethernet devices - check that
> > > CONFIG_RTE_LIBRTE_IGB_PMD=y and that CONFIG_RTE_LIBRTE_EM_PMD=y and that
> > > CONFIG_RTE_LIBRTE_IXGBE_PMD=y in your configuration file
> > >
> > This is a false indicator.  If you look at a later version of the code
> > you'll
> > see that the message has been pruned to just indicate that no probed
> > ethernet
> > devices were found.  The remainder of the message was there because it
> > used to
> > be a presumption that a physical devices was in use, which need not be the
> > case.
> > Like I said before you need an ivshmem driver, which qemu provides, but
> > not in
> > the current fedora build.
> >
> > >
> > > Is that with IVSHMEM device or physical devices? I guess it is physical
> > > device problem?
> > >
> > No, its not, you're making this harder than it needs to be.  google qemu
> > and
> > ivshmem and you'll see.  Heres an article to get you started:
> > http://lwn.net/Articles/380869/
> > Neil
> >
> > > Thank you
> > >
> > > Sothy
> >