Ignore the previous email, it was too long. Pls see this one only: Thanks - I got a confirmation from some Intel folks earlier that Intel DPDK apps do work inside containers. Also, the weird thing is, testpmd application runs in the container using lxc-execute. Lxc-execute runs the app inside container. It works, see below: root at anjali:/dpdk/x86_64-default-linuxapp-gcc/app# lxc-execute -n foo -- ./testpmd -c f -n 4 -- -i lxc: call to cgmanager_move_pid_abs_sync(cpuset) failed: Escape request from different namespace requires a proxy rte_eal_init : 859 opt : 99 opt : 110 EAL: Using free_hugepages EAL: path /sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages EAL: No of hugepages is 2048 rte_eal_init : 884 EAL: No of hugepages is 0 EAL: No of hugepages is 1 EAL: No of hugepages is 2 EAL: No of hugepages is 3 EAL: Setting up hugepage memory... EAL: Ask a virtual area of 0x8388608 bytes EAL: Virtual area found at 0x7f7c39c00000 (size = 0x800000) EAL: Ask a virtual area of 0x2097152 bytes EAL: Virtual area found at 0x7f7c39800000 (size = 0x200000) EAL: Ask a virtual area of 0x2097152 bytes EAL: Virtual area found at 0x7f7c39400000 (size = 0x200000) EAL: Ask a virtual area of 0x293601280 bytes EAL: Virtual area found at 0x7f7c27a00000 (size = 0x11800000) EAL: Ask a virtual area of 0x1841299456 bytes EAL: Virtual area found at 0x7f7bb9c00000 (size = 0x6dc00000) EAL: Ask a virtual area of 0x2097152 bytes EAL: Virtual area found at 0x7f7bb9800000 (size = 0x200000) EAL: Ask a virtual area of 0x2143289344 bytes EAL: Virtual area found at 0x7f7b39a00000 (size = 0x7fc00000) EAL: Ask a virtual area of 0x2097152 bytes EAL: Virtual area found at 0x7f7b39600000 (size = 0x200000) EAL: Requesting 1024 pages of size 2MB from socket 0 EAL: Requesting 1024 pages of size 2MB from socket 1 EAL: TSC frequency is ~2593752 KHz EAL: No of hugepages is 32902 EAL: No of hugepages is 3584 EAL: No of hugepages is 5421 EAL: No of hugepages is 35207 EAL: No of hugepages is 0 ?
? When I logged inside the container and ran the app, I saw this issue. Anjali On 7/3/14 7:53 AM, "Shaw, Jeffrey B" <jeffrey.b.shaw at intel.com> wrote: >Do you know if the host's hugepages are mapped into the container? >Seeing as containers are meant to provide isolation, it seems to make >sense that the host would not automatically share hugepages with a >container, but I'm not sure. > >Jeff > >-----Original Message----- >From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Anjali Kulkarni >Sent: Thursday, July 03, 2014 7:41 AM >To: dev at dpdk.org >Subject: [dpdk-dev] Question on huge pages and running DPDK apps inside >containers > >Hi, > >I am encountering a problem running DPDK apps inside containers, and need >your help: > >I create containers by doing: > >lxc-create -t ubuntu -n fpc0 >lxc-start -n fpc0 > >(Reserve hugepages and follow all other steps to run the DPDK app on host) > >Then run a standard dpdk app, on host, it works fine, inside container, >it runs into this problem: > >ubuntu at fpc0:/dpdk/x86_64-default-linuxapp-gcc/app$ ./testpmd -c f -n 4 -- >-i rte_eal_init : 857 opt : 99 opt : 110 >EAL: No free hugepages reported in hugepages-2048kB PANIC in >rte_eal_init(): >Cannot get hugepage information >6: [./testpmd() [0x402941]] >5: [/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) >[0x7f7f14f50ec5]] >4: [./testpmd() [0x40237e]] >3: [./testpmd() [0x478edb]] >2: [./testpmd() [0x4022ad]] >1: [./testpmd() [0x47e3c3]] >Aborted >ubuntu at fpc0:/dpdk/x86_64-default-linuxapp-gcc/app$ > >However, running this same app on the host, or doing lxc-execute works. > >While trying to debug my own dpdk app, I see that reading the same file >for no of huge pages ( > >/sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages > > ), on the host, its value is read 2048, while inside the container it is >0. This is same file. >Also, if you cat the contents of this file, it is actually 0! >(nr_hugepages is 2048, but the DPDK code does not read this file.) > >cat /sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages >0 > > >In the below logs, the 2 prints "EAL: Using .." and "EAL: path ..." are >added by me in DPDL eal library. > >On host: >rte_eal_init : 859 >opt : 99 >opt : 110 >EAL: Using free_hugepages >EAL: path /sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages >EAL: No of hugepages is 2048 > >Inside container: >pt : 99 >opt : 110 >EAL: Using free_hugepages >EAL: path /sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages >EAL: No of hugepages is 0 > > >Has anyone run into this problem and know what's the issue? > >Anjali
