Segmentation fault when running examples

[bestgen]

Hello. When I try to run the webserver examples of OFP, the system is not able to open threads and crashed. The error messages are:

[admin@localhost ofp]$ sudo ./example/webserver/webserver -i ens33 -c 4 -f ./example/webserver/ofp.cli &
[6] 5865
[admin@localhost ofp]$ RLIMIT_CORE: 0/-1
Setting to max: 0
HW time counter freq: 3408013176 hz

_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishm.c:881:_odp_ishm_reserve():No huge pages, fall back to normal pages. check: /proc/sys/vm/nr_hugepages.
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
PKTIO: initialized loop interface.
PKTIO: initialized pcap interface.
PKTIO: initialized ipc interface.
PKTIO: initialized socket mmap, use export ODP_PKTIO_DISABLE_SOCKET_MMAP=1 to disable.
PKTIO: initialized socket mmsg,use export ODP_PKTIO_DISABLE_SOCKET_MMSG=1 to disable.
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory
_ishmphy.c:152:_odp_ishmphy_map():mmap failed:Cannot allocate memory

ODP system info
---------------
ODP API version: 1.17.0
CPU model:       Intel(R) Core(TM) i7-6700 CPU
CPU freq (hz):   3407504000
Cache line size: 64
Core count:      4

Running ODP appl: "webserver"
-----------------
IF-count:        1
Using IFs:       ens33

(The program stuck here and show segmentation fault when it was force-terminated )

It shows that ODP failed to allocated the OFP shared memory. Is it the result of not enough available memory? I set up OFP on the virtual machine based on Vmware, and I have allocate the virtual machine 4 cores and 2GB memory. If it is, how much is enough?

Besides that, I debug the codes and found the program get stuck in the sentence params->num_vrf = OFP_NUM_VRF; in the function ofp_init_global_param_from_file(), which is in line 108 of app_main.c. And the debug error shows No source available for "vfprintf() at 0x7ffff66466e4".It is weird since that sentence is just an assignment instruction.

Can someone please offer some help? Thank you.

[JereLeppanen]

Could you try the same with strace to see which system call, if any, is blocking?

$ sudo strace -f ./example/webserver/webserver -i ens33 -c 4 -f ./example/webserver/ofp.cli

[bestgen]

Thank you for your reply @JereLeppanen . I think it stuck in opening /usr/local/bin/ofp/etc/ofp.conf. ofp.conf, even etc doesn't exist beneath the ofp path or in the whole file system. /usr/local/etc only has the odp folder and has no ofp.conf file, either.

[pid  2848] fstat(15, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
[pid  2848] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcad2383000
[pid  2848] read(15, "processor\t: 0\nvendor_id\t: Genuin"..., 1024) = 1024
[pid  2848] read(15, "enuineIntel\ncpu family\t: 6\nmodel"..., 1024) = 1024
[pid  2848] close(15)                   = 0
[pid  2848] munmap(0x7fcad2383000, 4096) = 0
[pid  2848] write(1, "\nODP system info\n---------------"..., 33
ODP system info
---------------
) = 33
[pid  2848] write(1, "ODP API version: 1.17.0\n", 24ODP API version: 1.17.0
) = 24
[pid  2848] write(1, "CPU model:       Intel(R) Core(T"..., 47CPU model:       Intel(R) Core(TM) i7-6700 CPU
) = 47
[pid  2848] write(1, "CPU freq (hz):   3407645000\n", 28CPU freq (hz):   3407645000
) = 28
[pid  2848] write(1, "Cache line size: 64\n", 20Cache line size: 64
) = 20
[pid  2848] write(1, "Core count:      4\n\n", 20Core count:      4

) = 20
[pid  2848] write(1, "Running ODP appl: \"webserver\"\n--"..., 48Running ODP appl: "webserver"
-----------------
) = 48
[pid  2848] write(1, "IF-count:        1\n", 19IF-count:        1
) = 19
[pid  2848] write(1, "Using IFs:       ens33\n", 23Using IFs:       ens33
) = 23
[pid  2848] write(1, "\n", 1
)           = 1
[pid  2848] open("/usr/local/bin/ofp/etc/ofp.conf", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid  2848] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x100000000} ---
[pid  2848] +++ killed by SIGSEGV (core dumped) +++
<... accept resumed> 0x7ffe629ff960, 0x7ffe629ff8d8) = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=2848, si_uid=0} ---
+++ killed by SIGTERM +++
Segmentation fault
[admin@localhost ofp]$ 

[JereLeppanen]

Well, the strace shows that the open() call for ofp.conf returned an error, so at least it's not stuck in a system call. Please try disabling the configuration file with ./configure --disable-libconfig.

Assuming you're using a not-very-old OFP master, you could also try with a newer version of ODP. The latest version is 1.19.0.1.

[bestgen]

Thanks @JereLeppanen . I found there are some updates of ofp as well as the user guide. I install the latest version and it works well. Thank you for your help.