Hi, >-----Original Message----- >From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of jerry >Sent: Sunday, September 14, 2014 5:01 PM >To: dev at dpdk.org >Cc: luonengjun at huawei.com >Subject: [dpdk-dev] l2fwd mmap memory failed > >Hi all, > >The l2fwd sample application starts failed in my environment with 90000 2M >hugepages set up. >It tells me that mmap failed: Cannot allocate memory. >Is there a limited max hugepages or memory size for dpdk to mmap EAL >memory? > >Some information as follows: > >1. Environment: >Host OS: Suse11 Sp3 x86_64 >NIC: intel 82599 >DPDK: 1.6.0r2 > >2. Hugepage Configuration in Kernel command line: >hugepagesz=2M default_hugepagesz=2M hugepages=90000 > >3. l2fwd command line: >./build/l2fwd -c 0x3 -n 3 --socket-mem 2048 -- -q 1 -p 3 > >4. cat /proc/meminfo: >HugePages_Total: 90000 >HugePages_Free: 90000 >HugePages_Rsvd: 0 >HugePages_Surp: 0 >Hugepagesize: 2048 kB > >5. Error messages in dpdk log: >Sun Sep 14 08:37:28 2014:EAL: Detected lcore 0 as core 0 on socket 0 Sun Sep 14 >08:37:28 2014:EAL: Detected lcore 1 as core 1 on socket 0 Sun Sep 14 08:37:28 >2014:EAL: Setting up memory... >Sun Sep 14 08:38:44 2014:EAL: map_all_hugepages(): mmap failed: Cannot >allocate memory Sun Sep 14 08:38:44 2014:EAL: Failed to mmap 2 MB >hugepages Sun Sep 14 08:38:44 2014:EAL: Cannot init memory Sun Sep 14 >08:38:44 2014:EAL: Error - exiting with code: 1 > Cause: Sun Sep 14 08:38:44 2014:Invalid EAL parameters > > >Anyone know the issue and the corresponding fix? Thanks.
It's a system mmap failure. As you have to map so many huge pages, I suggest that you check /proc/sys/vm/max_map_count to see if the map count exceeds the max value.
