Re: [dpdk-users] [DPDK-PDUMP] Issue: RING: Cannot reserve memory

["Rosen, Rami" <rami.rosen@intel.com>]

Hi Rajesh,

Can you please provide more details:

- Which DPDK version are you using? 

- dpdk-pdump is a secondary process and must be launched along with
any primary process. Which is the primary process you are running ? 
is it something that you developed on your own/took something from DPDK examples (with/without extending it), etc ? 

Regards,
Rami Rosen


-----Original Message-----
From: users [mailto:users-bounces@dpdk.org] On Behalf Of RAJESH KUMAR S.R
Sent: Monday, March 12, 2018 12:25
To: users@dpdk.org
Subject: [dpdk-users] [DPDK-PDUMP] Issue: RING: Cannot reserve memory

Hi,

I am new to dpdk.
I'm trying to use dpdk-pdump tool. I'm able to capture packets on dpdk ports.

But, I'm facing the following issue
I'm getting a error "RING:Cannot reserve memory" while trying to restart the pdump tool or running 2 instances of pdump.
I have also used the rte_eal_cleanup while exiting pdump main function.


Output:
* sudo /opt/pep/active/bin/dpdk-pdump -- --pdump
'port=0,queue=*,rx-dev=/tmp/rx.pcap,tx-dev=/tmp/tx.pcap'*
[sudo] password for admin:
EAL: Detected 2 lcore(s)
EAL: Multi-process socket /var/run/.rte_unix_1061_ce297dfe759
EAL: Probing VFIO support...
EAL: WARNING: Address Space Layout Randomization (ASLR) is enabled in the kernel.
EAL:    This may cause issues with mapping memory into secondary processes
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable clock cycles !
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:04.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:05.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: Requested device 0000:00:05.0 cannot be used
PMD: Initializing pmd_pcap for net_pcap_rx_0
PMD: Creating pcap-backed ethdev on numa socket -1 Port 2 MAC: 00 00 00 01 02 03
PMD: Initializing pmd_pcap for net_pcap_tx_0
PMD: Creating pcap-backed ethdev on numa socket -1 Port 3 MAC: 00 00 00 01 02 03 ^C

Signal 2 received, preparing to exit...
##### PDUMP DEBUG STATS #####
 -packets dequeued:            4
 -packets transmitted to vdev:        4
 -packets freed:            0


Restarting........

*> sudo /opt/pep/active/bin/dpdk-pdump -- --pdump
'port=0,queue=*,rx-dev=/tmp/rx.pcap,tx-dev=/tmp/tx.pcap'*
EAL: Detected 2 lcore(s)
EAL: Multi-process socket /var/run/.rte_unix_1073_cea9cc51241
EAL: Probing VFIO support...
EAL: WARNING: Address Space Layout Randomization (ASLR) is enabled in the kernel.
EAL:    This may cause issues with mapping memory into secondary processes
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable clock cycles !
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:04.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:05.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: Requested device 0000:00:05.0 cannot be used
PMD: Initializing pmd_pcap for net_pcap_rx_0
PMD: Creating pcap-backed ethdev on numa socket -1
PMD: Initializing pmd_pcap for net_pcap_tx_0
PMD: Creating pcap-backed ethdev on numa socket -1 Segmentation fault

*> sudo /opt/pep/active/bin/dpdk-pdump -- --pdump
'port=0,queue=*,rx-dev=/tmp/rx.pcap,tx-dev=/tmp/tx.pcap'*
EAL: Detected 2 lcore(s)
EAL: Multi-process socket /var/run/.rte_unix_1087_cec3ab006b1
EAL: Probing VFIO support...
EAL: WARNING: Address Space Layout Randomization (ASLR) is enabled in the kernel.
EAL:    This may cause issues with mapping memory into secondary processes
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable clock cycles !
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:04.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:05.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: Requested device 0000:00:05.0 cannot be used
RING: Cannot reserve memory
EAL: Error - exiting with code: 1
  Cause: File exists:create_mp_ring_vdev:634



Hugepage info:
cat /proc/meminfo | grep Huge
AnonHugePages:      6144 kB
HugePages_Total:     300
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB


Can you please help me in finding the issue.



Thanks,
Rajesh kumar S R