Can you try deleting the hugepage files on the host before trying to run the app in a container?
> -----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
