Panic when calling anssock_init() from c++

[st-ud-hu]

I would like to use ANS (as of 2016-06-29 from github) from a C++ program. I could compile and link against the program successfully:

[100%] Building CXX object CMakeFiles/binxfer.dir/binxfer.cpp.o
/usr/bin/c++ -std=c++11 -I/work/dpdk-ans/librte_anssock/include -I/work/dpdk-ans/librte_ans/include -o CMakeFiles/binxfer.dir/binxfer.cpp.o -c /work/linktest/binxfer.cpp
Linking CXX executable binxfer
/usr/bin/cmake -E cmake_link_script CMakeFiles/binxfer.dir/link.txt --verbose=1
/usr/bin/c++ -std=c++11 CMakeFiles/binxfer.dir/binxfer.cpp.o -o binxfer -rdynamic /work/dpdk-ans/librte_ans/librte_ans.a /work/dpdk-ans/librte_anssock/librte_anssock.a /usr/local/share/dpdk/x86_64-native-linuxapp-gcc/lib/librte_mbuf.a /usr/local/share/dpdk/x86_64-native-linuxapp-gcc/lib/librte_eal.a /usr/local/share/dpdk/x86_64-native-linuxapp-gcc/lib/librte_mempool.a /usr/local/share/dpdk/x86_64-native-linuxapp-gcc/lib/librte_ring.a -lrt -lpthread -ldl

But the program terminates at calling anssock_init() right after the start:

./binxfer

EAL: Detected lcore 0 as core 0 on socket 0
EAL: Detected lcore 1 as core 1 on socket 0
EAL: Detected lcore 2 as core 0 on socket 0
EAL: Detected lcore 3 as core 1 on socket 0
EAL: Support maximum 128 logical core(s) by configuration.
EAL: Detected 4 lcore(s)
PANIC in rte_eal_config_reattach():
Cannot mmap memory for rte_config
: [./binxfer() [0x40723b]]
6: [/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7ffff6becf45]]
5: [./binxfer(main+0x164) [0x407464]]
4: [./binxfer(anssock_init+0x17a) [0x40c16a]]
3: [./binxfer(rte_eal_init+0xf69) [0x418629]]
2: [./binxfer(__rte_panic+0xc9) [0x406c85]]
1: [./binxfer(rte_dump_stack+0x1a) [0x41f7fa]]
Aborted (core dumped)

The example webserver included with dpdk-ans is working correctly on the same system.

Is it possible to use ANS from C++ applications? Do I need some specific compile/link options to do that? (Sorry if placing issue to the wrong place.)

[bluenet13]

You shall startup ANS(tcp/ip stack) process before run your application.
Please read the wiki carefully.

[st-ud-hu]

Yes, I know. It is started with the following options:
./ans -c 0x1 -- -p 0x1 --config="(0,0,0)(0,1,0)"
And it is running constantly.

[bluenet13]

Your application (binxfer) can't mapping same virtual memory address. you may reboot your linux pc, and try it again.

[bluenet13]

Or you may run ans as below, input a base virtual address.
./ans -c 0x1 --base-virtaddr=0x2aaa4a90000 -- -p 0x1 --config="(0,0,0)(0,1,0)"

[st-ud-hu]

Rebooting host not helped but specifying virtual address works. The init is now successful. :-)
Thank you! :-)