[dpdk-users] net_mlx5: priv allocation failure

Tao Peng dev.pengtao at gmail.com
Tue Apr 24 04:24:54 CEST 2018
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*And when I run testpmd , I get the same error:*


$./testpmd -c 0xff00 -n 4  -- --rxq=2 --txq=2 -i

EAL: Detected 64 lcore(s)

EAL: No free hugepages reported in hugepages-1048576kB

EAL: Probing VFIO support...

EAL: WARNING: Master core has no memory on local socket!

EAL: PCI device 0000:01:00.0 on NUMA socket 0

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_0" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: priv allocation failure

EAL: Requested device 0000:01:00.0 cannot be used

EAL: PCI device 0000:01:00.1 on NUMA socket 0

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_1" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: priv allocation failure

EAL: Requested device 0000:01:00.1 cannot be used

EAL: PCI device 0000:02:00.0 on NUMA socket 0

EAL:   probe driver: 8086:1521 net_e1000_igb

EAL: PCI device 0000:02:00.1 on NUMA socket 0

EAL:   probe driver: 8086:1521 net_e1000_igb

EAL: PCI device 0000:81:00.0 on NUMA socket -1

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_2" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: priv allocation failure

EAL: Requested device 0000:81:00.0 cannot be used

EAL: PCI device 0000:81:00.1 on NUMA socket -1

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_3" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: priv allocation failure

EAL: Requested device 0000:81:00.1 cannot be used

EAL: PCI device 0000:82:00.0 on NUMA socket -1

EAL:   probe driver: 8086:10fb net_ixgbe

EAL: PCI device 0000:82:00.1 on NUMA socket -1

EAL:   probe driver: 8086:10fb net_ixgbe



And, when I use 'sudo', the error will disappeared.

$sudo ./testpmd -c 0xff00 -n 4  -- --rxq=2 --txq=2 -i

EAL: Detected 64 lcore(s)

EAL: No free hugepages reported in hugepages-1048576kB

EAL: Probing VFIO support...

EAL: PCI device 0000:01:00.0 on NUMA socket 0

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_0" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: MPS is enabled

PMD: net_mlx5: port 1 MAC address is 24:8a:07:b7:4e:3e

EAL: PCI device 0000:01:00.1 on NUMA socket 0

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_1" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: MPS is enabled

PMD: net_mlx5: port 1 MAC address is 24:8a:07:b7:4e:3e

EAL: PCI device 0000:02:00.0 on NUMA socket 0

EAL:   probe driver: 8086:1521 net_e1000_igb

EAL: PCI device 0000:02:00.1 on NUMA socket 0

EAL:   probe driver: 8086:1521 net_e1000_igb

EAL: PCI device 0000:81:00.0 on NUMA socket -1

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_2" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: MPS is enabled

PMD: net_mlx5: port 1 MAC address is 24:8a:07:b7:62:0a

EAL: PCI device 0000:81:00.1 on NUMA socket -1

EAL:   probe driver: 15b3:1015 net_mlx5

PMD: net_mlx5: PCI information matches, using device "mlx5_3" (SR-IOV:
false, MPS: true)

PMD: net_mlx5: 1 port(s) detected

PMD: net_mlx5: MPS is enabled

2018-04-23 22:45 GMT+08:00 Tao Peng <dev.pengtao at gmail.com>:

> thanks for your reply. :)
>
> I try to 'setcap' for  ./build/l2fwd, but, I get the same error. :(
>
> 1.
> sudo setcap cap_net_admin,cap_net_raw,cap_ipc_lock=ep ./build/l2fwd
>
> 2.
>
> $getcap ./build/l2fwd
> ./build/l2fwd = cap_net_admin,cap_net_raw,cap_ipc_lock+ep
>
> 3.
> $./build/l2fwd -c 0x1 -n 4  -- -p 0x1
>
> EAL: Detected 64 lcore(s)
>
> EAL: No free hugepages reported in hugepages-1048576kB
>
> EAL: Probing VFIO support...
>
> EAL: WARNING: Master core has no memory on local socket!
>
> EAL: PCI device 0000:01:00.0 on NUMA socket 0
>
> EAL:   probe driver: 15b3:1015 net_mlx5
>
> PMD: net_mlx5: PCI information matches, using device "mlx5_0" (SR-IOV:
> false, MPS: true)
>
> PMD: net_mlx5: 1 port(s) detected
>
> PMD: net_mlx5: priv allocation failure
>
> EAL: Requested device 0000:01:00.0 cannot be used
>
> EAL: PCI device 0000:01:00.1 on NUMA socket 0
>
> EAL:   probe driver: 15b3:1015 net_mlx5
>
> PMD: net_mlx5: PCI information matches, using device "mlx5_1" (SR-IOV:
> false, MPS: true)
>
> PMD: net_mlx5: 1 port(s) detected
>
> PMD: net_mlx5: priv allocation failure
>
> EAL: Requested device 0000:01:00.1 cannot be used
>
> EAL: PCI device 0000:02:00.0 on NUMA socket 0
>
> EAL:   probe driver: 8086:1521 net_e1000_igb
>
> EAL: PCI device 0000:02:00.1 on NUMA socket 0
>
> EAL:   probe driver: 8086:1521 net_e1000_igb
>
> EAL: PCI device 0000:81:00.0 on NUMA socket -1
>
> EAL:   probe driver: 15b3:1015 net_mlx5
>
> PMD: net_mlx5: PCI information matches, using device "mlx5_2" (SR-IOV:
> false, MPS: true)
>
> PMD: net_mlx5: 1 port(s) detected
>
> PMD: net_mlx5: priv allocation failure
>
> EAL: Requested device 0000:81:00.0 cannot be used
>
> EAL: PCI device 0000:81:00.1 on NUMA socket -1
>
> EAL:   probe driver: 15b3:1015 net_mlx5
>
> PMD: net_mlx5: PCI information matches, using device "mlx5_3" (SR-IOV:
> false, MPS: true)
>
> PMD: net_mlx5: 1 port(s) detected
>
> PMD: net_mlx5: priv allocation failure
>
> EAL: Requested device 0000:81:00.1 cannot be used
>
> EAL: PCI device 0000:82:00.0 on NUMA socket -1
>
> EAL:   probe driver: 8086:10fb net_ixgbe
>
> EAL: PCI device 0000:82:00.1 on NUMA socket -1
>
> EAL:   probe driver: 8086:10fb net_ixgbe
>
> MAC updating enabled
>
> MEMPOOL: Cannot allocate tailq entry!
>
> EAL: Error - exiting with code: 1
>
>   Cause: Cannot init mbuf pool
>
> 2018-04-23 19:24 GMT+08:00 Adrien Mazarguil <adrien.mazarguil at 6wind.com>:
>
>> On Mon, Apr 23, 2018 at 06:03:49PM +0800, Tao Peng wrote:
>> > Hi ,
>> >
>> > When I run the dpdk l2fwd , I encountered some errors, please help,
>> thanks!
>> > :)
>> >
>> > $./build/l2fwd -c 0x1 -n 4 -- -p 0x1
>>
>> Can you confirm this problem only occurs when attempting to run l2fwd as
>> an
>> unprivileged user?
>>
>> I just want to make sure, because it's is currently undocumented, untested
>> and therefore unsupported. This being said, please see below.
>>
>> > EAL: Detected 64 lcore(s)
>> >
>> > EAL: No free hugepages reported in hugepages-1048576kB
>> >
>> > EAL: Probing VFIO support...
>> >
>> > EAL: WARNING: Master core has no memory on local socket!
>> >
>> > EAL: PCI device 0000:01:00.0 on NUMA socket 0
>> >
>> > EAL:   probe driver: 15b3:1015 net_mlx5
>> >
>> > PMD: net_mlx5: PCI information matches, using device "mlx5_0" (SR-IOV:
>> > false, MPS: true)
>> >
>> > PMD: net_mlx5: 1 port(s) detected
>> >
>> > PMD: net_mlx5: priv allocation failure
>> >
>> > EAL: Requested device 0000:01:00.0 cannot be used
>> >
>> > EAL: PCI device 0000:01:00.1 on NUMA socket 0
>> >
>> > EAL:   probe driver: 15b3:1015 net_mlx5
>> >
>> > PMD: net_mlx5: PCI information matches, using device "mlx5_1" (SR-IOV:
>> > false, MPS: true)
>> >
>> > PMD: net_mlx5: 1 port(s) detected
>> >
>> > PMD: net_mlx5: priv allocation failure
>> >
>> > EAL: Requested device 0000:01:00.1 cannot be used
>> >
>> > EAL: PCI device 0000:02:00.0 on NUMA socket 0
>> >
>> > EAL:   probe driver: 8086:1521 net_e1000_igb
>> >
>> > EAL: PCI device 0000:02:00.1 on NUMA socket 0
>> >
>> > EAL:   probe driver: 8086:1521 net_e1000_igb
>> >
>> > EAL: PCI device 0000:81:00.0 on NUMA socket -1
>> >
>> > EAL:   probe driver: 15b3:1015 net_mlx5
>> >
>> > PMD: net_mlx5: PCI information matches, using device "mlx5_2" (SR-IOV:
>> > false, MPS: true)
>> >
>> > PMD: net_mlx5: 1 port(s) detected
>> >
>> > PMD: net_mlx5: priv allocation failure
>> >
>> > EAL: Requested device 0000:81:00.0 cannot be used
>> >
>> > EAL: PCI device 0000:81:00.1 on NUMA socket -1
>> >
>> > EAL:   probe driver: 15b3:1015 net_mlx5
>> >
>> > PMD: net_mlx5: PCI information matches, using device "mlx5_3" (SR-IOV:
>> > false, MPS: true)
>> >
>> > PMD: net_mlx5: 1 port(s) detected
>> >
>> > PMD: net_mlx5: priv allocation failure
>> >
>> > EAL: Requested device 0000:81:00.1 cannot be used
>> >
>> > EAL: PCI device 0000:82:00.0 on NUMA socket -1
>> >
>> > EAL:   probe driver: 8086:10fb net_ixgbe
>> >
>> > EAL: PCI device 0000:82:00.1 on NUMA socket -1
>> >
>> > EAL:   probe driver: 8086:10fb net_ixgbe
>> >
>> > MAC updating enabled
>> >
>> > MEMPOOL: Cannot allocate tailq entry!
>> >
>> > EAL: Error - exiting with code: 1
>> >
>> >   Cause: Cannot init mbuf pool
>> >
>> >
>> > *Hugepage info:*
>> >
>> > $cat /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
>> > 8192
>> >
>> > $cat /sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages
>> > 5120
>> >
>> >
>> > But , If I run in the below command, it will run successful.
>> >
>> > $*sudo* ./build/l2fwd -c 0x1 -n 4 -- -p 0x1
>> >
>> > But, I dont want to run l2fwd in sudo mode.
>>
>> A few extra capabilities are necessary in order to start a DPDK
>> application
>> as an unprivileged user (as opposed to starting it as root before dropping
>> unwanted privileges).
>>
>> Both mlx4 and mlx5 PMDs require CAP_NET_ADMIN, CAP_NET_RAW and
>> CAP_IPC_LOCK
>> respectively to fiddle with their associated kernel netdevice, create
>> queues
>> for any kind of traffic and lock memory (the last one is not necessarily
>> needed when running with --no-huge).
>>
>> If acceptable for your application, then you may try something like:
>>
>>  root# setcap cap_net_admin,cap_net_raw,cap_ipc_lock=ep ./build/l2fwd
>>
>>  user$ ./build/l2fwd [...]
>>
>> Note the described approach adds capabilities through extended device
>> attributes on the file system (those are rarely preserved when copying
>> files). While finer grained than "chmod +s", you still need to carefully
>> consider the security implications, trust the program and its users.
>>
>> Have a look at man capabilities(7).
>>
>> --
>> Adrien Mazarguil
>> 6WIND
>>
>
>
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