[dpdk-users] story of rte_memset()

[dpdk-users] story of rte_memset()

[Sivakiran Kodali]

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Hello All,

Ive seen a couple of patches saying rte_memset() improves performance when compared against 
libc's memset(). But i dont see any rte_memset() code in the 17.11 tar ball. Did the patch went in ?
Or is it just rte_memcpy() that is available ?


Thanks
Sivakiran K
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Date: Tue, 24 Jul 2018 22:07:25 +0000 (UTC)
From: Kandy Palanisamy <kandy_pal@yahoo.com>
To: "users@dpdk.org" <users@dpdk.org>, "Rosen, Rami" <rami.rosen@intel.com>
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Subject: Re: [dpdk-users] TestPMD: Unable to create TAP interface
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 Hello Rami,
Thanks for your suggestion.
The /dev/net/tun device is automatically created, if I just insmod the kernel module 'tun' (I had not done that; that was the cause of the failure). After that, the testpmd command to create tuntap is successful.
Kandy

    On Monday, July 23, 2018, 12:38:36 PM PDT, Rosen, Rami <rami.rosen@intel.com> wrote:  
 
 Hi Kandy,
What is the output of 
ls -al /dev/net/tun 
on that host ? 
if it is empty, can you please try:

mkdir /dev/net (if it doesn't exist already)
mknod /dev/net/tun c 10 200

and then launch the same command you used for starting testpmd ? 

See:
https://www.kernel.org/doc/Documentation/networking/tuntap.txt

Regards,
Rami Rosen

-----Original Message-----
From: users [mailto:users-bounces@dpdk.org] On Behalf Of Kandy Palanisamy
Sent: Friday, July 20, 2018 01:22
To: users@dpdk.org
Subject: [dpdk-users] TestPMD: Unable to create TAP interface

Hi,
I tried to create a tap device using TestPMD as follows:
     testpmd -l 0-3 -n 4 --vdev=net_tap0 -- -i But, I get the error:
PMD: Initializing pmd_tap for net_tap0 as dtap0
PMD: Unable to create TAP interface
PMD: dtap0: tun_alloc() failed.

Appreciate if someone could help what I am missing.
Here is the complete log, and list of modules loaded and the ixgbe interface bound to dpdk.=====================================================================
root@intel-corei7-64:/tmp# /usr/bin/testpmd -l 0-3 -n 4 --vdev=net_tap0 -- -i
EAL: Detected 16 lcore(s)
EAL: Multi-process socket /var/run/.rte_unix
EAL: Probing VFIO support...
EAL: NUMA support not available consider that all memory is in socket_id 0
EAL: PCI device igb_uio 0000:04:00.0: uio device registered with irq 50
0000:04:00.0 on NUMA socket 0
EAL:   probe driver: 8086:15ac net_ixgbe
EAL: PCI device 0000:04:00.1 on NUMA socket 0
EAL:   probe driver: 8086:15ac net_ixgbe
EAL: PCI device 0000:0a:00.0 on NUMA socket 0
EAL:   probe driver: 8086:1533 net_e1000_igb
PMD: Initializing pmd_tap for net_tap0 as dtap0
PMD: Unable to create TAP interface
PMD: dtap0: tun_alloc() failed.
PMD: TAP Unable to initialize net_tap0
vdev_probe(): failed to initialize net_tap0 device

EAL: Bus (vdev) probe failed.
Interactive-mode selected
testpmd: create a new mbuf pool <mbuf_pool_socket_0>: n=171456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc

Warning! port-topology=paired and odd forward ports number, the last port will pair with itself.

Configuring Port 0 (socket 0)
Port 0: 00:13:95:2B:DC:7E
Checking link statuses...
Done
testpmd> 

root@intel-corei7-64:/tmp# lsmod
Module                  Size  Used by
rte_kni                20480  0
igb_uio                16384  0
uio                    16384  1 igb_uio
8021q                  24576  0
nfc                    69632  0
bnep                   20480  2
intel_rapl             20480  0
igb                   167936  0
ixgbe                 249856  0
mei_me                 28672  0
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
mei                    61440  1 mei_me
mdio                   16384  1 ixgbe
coretemp               16384  0
root@intel-corei7-64:/tmp#
root@intel-corei7-64:/tmp#
root@intel-corei7-64:/tmp# dpdk-devbind --status

Network devices using DPDK-compatible driver ============================================
0000:04:00.0 'Ethernet Connection X552 10 GbE SFP+ 15ac' drv=igb_uio unused=ixgbe

Network devices using kernel driver
===================================
0000:04:00.1 'Ethernet Connection X552 10 GbE SFP+ 15ac' if=eth2 drv=ixgbe unused=igb_uio
0000:0a:00.0 'I210 Gigabit Network Connection 1533' if=eth0 drv=igb unused=igb_uio *Active*

::Thanks for your help,Kandy
  
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From: Uditha Bandara <ubndra@gmail.com>
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Subject: [dpdk-users] pktgen run.py error: NameError: name 'false' is not
	defined
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Hi,

I'm trying to install Pktgen on a system running Linux Mint 18.1 Serena.
I followed the steps given in:

http://pktgen-dpdk.readthedocs.io/en/latest/getting_started.html

When I executed "./tools/run.py -s default" I am getting the following
error.

uditha@udithapc ~/sandbox/pktgen/pktgen-dpdk $ ./tools/run.py -s default
>>> sdk '/home/uditha/sandbox/pktgen/dpdk', target
'x86_64-native-linuxapp-gcc'
Traceback (most recent call last):
  File "./tools/run.py", line 361, in <module>
    main()
  File "./tools/run.py", line 358, in main
    setup_cfg(cfg_file)
  File "./tools/run.py", line 219, in setup_cfg
    cfg = load_cfg(cfg_file)
  File "./tools/run.py", line 119, in load_cfg
    cfg = imp.load_source('cfg', '', f)
  File "", line 1, in <module>

NameError: name 'false' is not defined

I have tried cleaning up the files and a re-install but getting the same
error. Does any of the config files needed to be edited before this step?

Thanks in advance!

Regards,
Uditha