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From: jerry <jerry.lilijun@huawei.com>
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Subject: [dpdk-dev] l2fwd mmap memory failed
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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.

B.R.
Jerry