Re: [dpdk-dev] [PATCH] doc: update mlx4 usage and dependencies

[Raghav Sethi <raghavs@CS.Princeton.EDU>]

Hi Olga,

Thanks so much! I had sent you the output for the case with dynamic
linking. Removing the libraries from /usr/local and re-installing OFED
solved the library issue. However, there is a new problem (below)

An earlier install in the wrong place must have caused the problem. The
OFED uninstaller does not remove the libraries from /usr/local, only
usr/lib apparently. Also, the installer apparently doesn't install them in
/usr/lib if they are present in /usr/local.

Here is the output for testpmd now:

EAL: PCI device 0000:06:00.0 on NUMA socket 0
EAL:   probe driver: 15b3:1003 librte_pmd_mlx4
PMD: librte_pmd_mlx4: PCI information matches, using device "mlx4_0" (VF:
false)
PMD: librte_pmd_mlx4: 1 port(s) detected
PMD: librte_pmd_mlx4: experimental ibv_exp_query_device
EAL: No probed ethernet devices

Any idea what the issue is in this case?

Best,
Raghav

On Sat, Apr 4, 2015 at 6:04 PM Olga Shern <olgas@mellanox.com> wrote:

>   If you compiled pmd statically with libibverbs and libmlx4 you
> shouldn't see it in ldd.
> Seems that something went wrong.
> In any case, ofed doesn't install libraries under /usr/local
> Please remove all mlx related libraries under /usr/local/ like libmlx4 and
> libibverbs
>
>
>
>
>
> -------- Original message --------
> From: Raghav Sethi
> Date:05/04/2015 00:29 (GMT+02:00)
> To: Olga Shern ,Adrien Mazarguil ,dev@dpdk.org,Xiaozhou Li
> Subject: Re: [dpdk-dev] [PATCH] doc: update mlx4 usage and dependencies
>
>
>  Hi Olga,
>
> Thanks very much for helping.
>
>  I tried stopping and starting, after stop lsmod | grep mlx had no
> matches. After start, it had the output listed below. The device is the
> same as on the rest of the machines - Mellanox ConnectX3-EN 40G single
> port. The application parameters are the same as the ones listed on the
> docs (except of course PCI address is different):
>
>  sudo ./testpmd -c 0xff -n 4 -w 0000:06:00.0 -- --rxq=2 --txq=2 -i
>
>  Outputs you requested:
>
>  1. lspci | grep Mellanox
> 06:00.0 Ethernet controller: Mellanox Technologies MT27500 Family
> [ConnectX-3]
>
>  2. ibdev2netdev
> mlx4_0 port 1 ==> p3p1 (Up)
>
>  3. ldd testpmd
>         linux-vdso.so.1 =>  (0x00007fff7c1dc000)
>         libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f1a7dc07000)
>         librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1
> (0x00007f1a7d9ff000)
>         libibverbs.so.1 => /usr/local/lib/libibverbs.so.1
> (0x00007f1a7d7eb000)
>         libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2
> (0x00007f1a7d5e7000)
>         libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
> (0x00007f1a7d3c9000)
>         libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1a7d003000)
>         /lib64/ld-linux-x86-64.so.2 (0x00007f1a7df19000)
>
>  4. lsmod | grep mlx
> mlx5_ib               138046  0
> mlx5_core             108376  1 mlx5_ib
> mlx4_ib               199880  0
> ib_sa                  43732  5 rdma_cm,ib_cm,mlx4_ib,rdma_ucm,ib_ipoib
> mlx4_en               137047  0
> ib_mad                 51544  4 ib_cm,ib_sa,mlx4_ib,ib_umad
> vxlan                  37619  1 mlx4_en
> ib_core               130498  12 rdma_cm,ib_cm,ib_sa,iw_cm,
> mlx4_ib,mlx5_ib,ib_mad,ib_ucm,ib_umad,ib_uverbs,rdma_ucm,ib_ipoib
> mlx4_core             332375  2 mlx4_en,mlx4_ib
> compat                 13738  17 rdma_cm,ib_cm,ib_sa,iw_cm,
> mlx4_en,mlx4_ib,mlx5_ib,ib_mad,ib_ucm,ib_addr,ib_core,ib_
> umad,ib_uverbs,mlx4_core,mlx5_core,rdma_ucm,ib_ipoib
> ptp                    18933  3 igb,ixgbe,mlx4_en
>
>  Best regards,
> Raghav
>
> On Sat, Apr 4, 2015 at 5:04 PM Olga Shern <olgas@mellanox.com> wrote:
>
>>  Hi Raghav,
>>
>>
>>
>> After running /etc/init.d/openibd restart you don’t need to load the
>> modules, they are loaded by the openibd script.
>>
>> Can you try to run :
>>
>> /etc/init.d/openibd stop
>>
>> Verify that modules are not loaded
>>
>> /etc/init.d/openib start
>>
>>
>>
>> If it won’t help:
>>
>> What Mellanox NIC do you have on the “problematic” machine?
>>
>> What command line do you use to run the application?
>>
>>
>>
>> Please send output of:
>>
>> 1.       ”lspci | grep Mellanox”
>>
>> 2.       ibdev2netdev
>>
>> 3.       ldd <your application>
>>
>> 4.       lsmod
>>
>>
>>
>> Thanks
>>
>> Olga
>>
>>
>>
>>
>>
>> *From:* Raghav Sethi [mailto:raghavs@CS.Princeton.EDU]
>> *Sent:* Saturday, April 04, 2015 11:54 PM
>> *To:* Olga Shern; Adrien Mazarguil; dev@dpdk.org; Xiaozhou Li
>>
>>
>> *Subject:* Re: [dpdk-dev] [PATCH] doc: update mlx4 usage and dependencies
>>
>>
>>
>> Hi Olga,
>>
>> Thanks for your reply. OFED version was 2.4-1.0.4 for ubuntu14.04-x86_64
>>
>> I tried both variants:
>>
>> - Compiling with dynamic linking against OFED libraries
>>
>> - Compiling with static linking against dpdk.org libraries
>>
>>
>>
>> Both have the same issue.
>>
>>
>>
>> Best,
>>
>> Raghav
>>
>>
>>
>> On Sat, Apr 4, 2015 at 4:49 PM Olga Shern <olgas@mellanox.com> wrote:
>>
>> Hi Raghav,
>>
>> What OFED version did you install?
>>
>> There are 2 ways to compile mlx4:
>> 1. You can compile it dynamically with the libibverbs  that are coming
>> with Mellanox_OFED 2.4
>> 2. To get better performance: compile it statically with libibverbs and
>> libmlx4 that can be downloaded from http://dpdk.org/download, the README
>> inside librte_pmd_mlx4 explains how to do it
>>      If you compile the pmd statically then MLNX_OFED is needed only for
>> kernel modules.
>>
>> Best Regards,
>> Olga
>>
>>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Raghav Sethi
>> Sent: Friday, April 03, 2015 9:21 PM
>> To: Adrien Mazarguil; dev@dpdk.org; Xiaozhou Li
>> Subject: Re: [dpdk-dev] [PATCH] doc: update mlx4 usage and dependencies
>>
>> Hi Adrien,
>>
>> Quick update: So I just tried the setup again on a new machine with the
>> exact same hardware - installed OFED and compiled DPDK 2.0.0. Works like a
>> charm.
>>
>> Still getting the issue on the old machine (also upgraded to 2.0.0 FWIW).
>> From the error message it appears that the libraries are incorrectly
>> installed/configured. However, the OFED uninstall script removes the
>> libraries in question (libmlx5-rdmav2.so, libibverbs/libmlx4-rdmav2.so,
>> libibverbs.so), I checked! In fact, I diffed the libibverbs.so from both
>> machines, and they're exactly identical. So it seems either the OFED
>> installation/uninstallation is somehow flawed, or the error message from
>> testpmd is misleading.
>>
>> Best,
>> Raghav
>>
>> On Fri, Apr 3, 2015 at 12:52 PM Raghav Sethi <raghavs@cs.princeton.edu>
>> wrote:
>>
>> > Hi Adrien,
>> >
>> > I've copied dev@dpdk.
>> >
>> > I re-installed Mellanox OFED, and then re-compiled DPDK without the
>> > flags for the static library. I'm running Ubuntu 14.04. However, I
>> > still get the same error message (below).
>> >
>> > I then tried re-installing the Mellanox libraries on dpdk.org, and
>> > compiled another copy of DPDK with them statically linked. This
>> > appears to work perfectly. I no longer get the permission issues I was
>> > getting before, possibly that was unrelated/fixed by OFED. Now both
>> > OFED, and OFED+ dpdk.org libs statically linked have the same issue:
>> >
>> > EAL: PCI device 0000:06:00.0 on NUMA socket 0
>> > EAL:   probe driver: 15b3:1003 librte_pmd_mlx4
>> > libibverbs: Warning: couldn't load driver '/usr/lib/libibverbs/libmlx5':
>> > /usr/lib/libibverbs/libmlx5-rdmav2.so: symbol ibv_exp_cmd_getenv,
>> > version
>> > IBVERBS_1.1 not defined in file libibverbs.so.1 with link time
>> > reference
>> > libibverbs: Warning: couldn't load driver '/usr/lib/libibverbs/libmlx4':
>> > /usr/lib/libibverbs/libmlx4-rdmav2.so: symbol
>> > ibv_exp_cmd_destroy_flow, version IBVERBS_1.1 not defined in file
>> > libibverbs.so.1 with link time reference
>> > libibverbs: Warning: no userspace device-specific driver found for
>> > /sys/class/infiniband_verbs/uverbs0
>> > PMD: librte_pmd_mlx4: cannot access device, is mlx4_ib loaded?
>> > EAL: No probed ethernet devices
>> >
>> > The OFED install was successful (and it apparently removes/overwrites
>> > old versions of the libraries). The installer also checks the firmware
>> > versions, and it says I'm on the latest. Loading the kernel modules is
>> > also successful, so I can't for the life of me figure out what this
>> issue is now.
>> >
>> > Again, just to be clear, the full list of steps was:
>> > 1. Install OFED, run /etc/init.d/openibd restart 2. Compile DPDK with
>> > the CONFIG_RTE_LIBRTE_MLX4_PMD=y 3. Set up hugepages 4. Load kernel
>> > modules 5. Run testpmd
>> >
>> > Best,
>> > Raghav
>> >
>> > On Fri, Apr 3, 2015 at 3:34 AM Adrien Mazarguil <
>> > adrien.mazarguil@6wind.com> wrote:
>> >
>> >> Hi Raghav,
>> >>
>> >> On Thu, Apr 02, 2015 at 10:05:57PM +0000, Raghav Sethi wrote:
>> >> > Hi Adrien,
>> >> >
>> >> > Thanks for your reply - I hope it's OK that I'm emailing you
>> off-list.
>> >> I'm
>> >> > a grad student at Princeton working on a research project.
>> >>
>> >> It's fine, but let's discuss on the ML as much as possible next time
>> >> so the community can benefit from it. Since very few people use this
>> >> driver at the moment (DPDK 2.0 is not even out yet), I have my own
>> >> questions for you.
>> >>
>> >> > Given your patch (which was very helpful, thanks), here is the
>> >> > series of all steps that I'm taking to run testpmd on a ConnectX-3
>> >> > EN 40G
>> >> >
>> >> > 1. Compile and install the mellanox-specific libraries listed here:
>> >> > http://dpdk.org/download/mlx4/2015-03-26-DPDK-v2.0.0/
>> >>
>> >> This is fine, but did you use the provided Makefile to compile these
>> >> libraries statically? If so, no issues?
>> >>
>> >> Also you did not install Mellanox OFED? You should, because updated
>> >> kernel modules come from that distribution. It won't work properly
>> >> (or at all) without them.
>> >>
>> >> The libraries from DPDK.org are actually optional once you've
>> >> installed Mellanox OFED. They only improve performance. Remember to
>> >> update firmwares also.
>> >>
>> >> > 2. export EXTRA_CFLAGS and EXTRA_LDFLAGS 3. Create a new
>> >> > configuration which includes the CONFIG_RTE_LIBRTE_MLX4_PMD=y flag.
>> >> > 4. Compile DPDK 2.0 with the new configuration using setup.sh 5.
>> >> > Set up hugepages using setup.sh 6. Load the kernel modules
>> >> > ib_uverbs mlx4_en mlx4_core mlx4_ib 7. Run testpmd with the right
>> >> > PCI bus address
>> >> >
>> >> > However, I consistently get:
>> >> > sudo: unable to execute ./testpmd: Permission denied
>> >>
>> >> Now that doesn't make sense, isn't that file missing permissions or
>> >> something? Are you running RHEL with a restrictive SELinux policy?
>> >> Is sudo configured to allow you to run testpmd?
>> >>
>> >> In any case, I don't think it's related to librte_pmd_mlx4.
>> >>
>> >> > I tried taking the interface down with ifconfig because
>> >> > (./tools/dpdk_nic_bind.py --status shows the interface as active),
>> >> > but
>> >> that
>> >> > didn't change anything.
>> >>
>> >> No, you should leave the interfaces up, it's not supposed to
>> >> disappear, the PMD will bring them back up anyway. Actually the Linux
>> >> kernel interface remains fully functional even while DPDK
>> >> applications are running. You can send packets out of it but as long
>> >> as both the kernel and DPDK applications share the same MAC address,
>> >> only DPDK applications will receive replies.
>> >> If
>> >> you change the MAC address on the kernel interface however, you'll be
>> >> able to use it normally.
>> >>
>> >> > I tried installing the mellanox libraries globally, but then I see
>> >> > these error messages:
>> >> >
>> >> > -------
>> >> > EAL: PCI device 0000:06:00.0 on NUMA socket 0
>> >> > EAL:   probe driver: 15b3:1003 librte_pmd_mlx4
>> >> > libibverbs: Warning: couldn't load driver
>> '/usr/lib/libibverbs/libmlx5':
>> >> > /usr/lib/libibverbs/libmlx5-rdmav2.so: symbol ibv_exp_cmd_getenv,
>> >> version
>> >> > IBVERBS_1.1 not defined in file libibverbs.so.1 with link time
>> >> > reference
>> >> > libibverbs: Warning: couldn't load driver
>> '/usr/lib/libibverbs/libmlx4':
>> >> > /usr/lib/libibverbs/libmlx4-rdmav2.so: symbol
>> >> > ibv_exp_cmd_destroy_flow, version IBVERBS_1.1 not defined in file
>> >> > libibverbs.so.1 with link time reference
>> >> > libibverbs: Warning: no userspace device-specific driver found for
>> >> > /sys/class/infiniband_verbs/uverbs0
>> >> > PMD: librte_pmd_mlx4: cannot access device, is mlx4_ib loaded?
>> >> > EAL: No probed ethernet devices
>> >> > Interactive-mode selected
>> >> > EAL: Error - exiting with code: 1
>> >> >   Cause: Creation of mbuf pool for socket 0 failed
>> >> > --------
>> >>
>> >> That's because the libibverbs version you're using is not compatible
>> >> with the userspace drivers installed on your system (libibverbs uses
>> >> dlopen() to load liblmx4). Even though you've installed both from
>> >> DPDK.org, seems you have another version installed by your
>> >> distribution packages.
>> >>
>> >> If you intend to use dynamic libraries, you should uninstall
>> >> libibverbs,
>> >> libmlx4 and related packages first.
>> >>
>> >> Regards,
>> >>
>> >> --
>> >> Adrien Mazarguil
>> >> 6WIND
>> >>
>> >
>>
>>