On Wed, 12 Aug 2020 16:59:33 +0530 Jatin Sahu <jatin...@gmail.com> wrote:
> Hi, > > We are using DPDK libraries with huge pages enabled. > We observed that the application rte_eal_init() function is stuck in > flock() call. > > Please advise how to resolve this. > > DPDK Version: dpdk-stable-18.11.6/ > > [root@loadtestsrv helloworld]# ./build/helloworld -l 0-3 -n 4 > EAL: Detected 72 lcore(s) > EAL: Detected 2 NUMA nodes > EAL: Multi-process socket /var/run/dpdk/rte/mp_socket > > Stack Trace: > Thread 3 (Thread 0x7f783c34e700 (LWP 1034)): > #0 0x00007f783c664113 in epoll_wait () from /lib64/libc.so.6 > #1 0x0000000000558724 in eal_intr_thread_main () > #2 0x00007f783c939dd5 in start_thread () from /lib64/libpthread.so.0 > #3 0x00007f783c663b3d in clone () from /lib64/libc.so.6 > Thread 2 (Thread 0x7f783bb4d700 (LWP 1035)): > #0 0x00007f783c940bfd in recvmsg () from /lib64/libpthread.so.0 > #1 0x0000000000565bae in mp_handle () > #2 0x00007f783c939dd5 in start_thread () from /lib64/libpthread.so.0 > #3 0x00007f783c663b3d in clone () from /lib64/libc.so.6 > Thread 1 (Thread 0x7f783d66dc00 (LWP 1033)): > #0 0x00007f783c655167 in flock () from /lib64/libc.so.6 > #1 0x000000000054e068 in eal_hugepage_info_init () > #2 0x000000000054ccfe in rte_eal_init () > #3 0x00000000004712a6 in main () > [root@loadtestsrv user]# > > HugePage details: > > [root@loadtestsrv roamware]# cat /proc/meminfo | grep -i huge > AnonHugePages: 112640 kB > HugePages_Total: 32 > HugePages_Free: 32 > HugePages_Rsvd: 0 > HugePages_Surp: 0 > Hugepagesize: 1048576 kB > > [roamware@loadtestsrv ~]$ cat > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages > 512 > [roamware@loadtestsrv ~]$ cat > /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages > 512 > > [root@loadtestsrv roamware]# cat /proc/mounts | grep -i huge > cgroup /sys/fs/cgroup/hugetlb cgroup > rw,seclabel,nosuid,nodev,noexec,relatime,hugetlb 0 0 > nodev /mnt/huge hugetlbfs rw,seclabel,relatime 0 0 > nodev /mnt/huge hugetlbfs rw,seclabel,relatime,pagesize=2M 0 0 > nodev /mnt/huge hugetlbfs rw,seclabel,relatime 0 0 > > Regards, > Jatin Maybe in this case Flock blocks if other process has the file locked? Is there another process which has flocked the file? Or you have a buggy kernel?
