[erlang-questions] Tracking down the reason for my Segmentation Fault (Core dump) problems.
Gene Sher
corticalcomputer@REDACTED
Thu Feb 12 00:32:12 CET 2015
Though as noted it happened on various Erlang installations for me, the one
I am currently using and on which I also get the Seg Fault is:
Erlang/OTP 17 [erts-6.3] [source-f9282c6] [64-bit] [smp:24:24]
[async-threads:10] [hipe] [kernel-poll:false]
On Wed, Feb 11, 2015 at 6:29 PM, Felix Gallo <felixgallo@REDACTED> wrote:
> What does it say when you type 'erl' at the command line? Example:
>
> Erlang/OTP 17 [erts-6.0] [source] [64-bit] [smp:2:2] [async-threads:10]
> [hipe] [kernel-poll:false]
>
> Eshell V6.0 (abort with ^G)
> 1>
>
> On Wed, Feb 11, 2015 at 2:54 PM, Gene Sher <corticalcomputer@REDACTED>
> wrote:
>
>> Hello List,
>>
>> Hardware: E5-Xeon 2697 v2, 32GB of RAM.
>> OSes tried: Xubuntu 14.04.1 LTS, CentOS 7, Ubuntu 12.04 LTS
>> Erlang versions the code was tried on: Erlang/OTP 17, R16, & R14
>>
>> I have an issue where every time I use processes which contain within
>> themselves large data structures (Large deep learning single process
>> nodes), after just a minute or so Erlang core dumps. The amount of ram used
>> is only about 2GB, so it can't be the system running out of memory, and its
>> only using about 10 cores, since I'm only running 10 such processes. Now
>> the same code, the same program, the same platform, functions without a
>> problem when I keep these processes small (substantially smaller monolithic
>> NN-module in each process). Everything is written purely in Erlang (No NIFs
>> were involved in this particular NN code).
>>
>> What exactly is happening? is something running out of space? Can anyone
>> recommend what option during the Erlang startup I should perhaps modify to
>> alleviate the issue?
>>
>> There are no crushdump files that I can find, but I did get a core
>> backtrace produced during one of these crashes when I was running
>> erts-5.10.4, here is a partial paste of it:
>>
>> ccpp-2015-02-11-09\:18\:41-2273/core_backtrace:
>> { "signal": 11
>> , "executable": "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> , "stacktrace":
>> [ { "crash_thread": true
>> , "frames":
>> [ { "address": 5352736
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1158432
>> , "function_name": "sweep_one_area"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 5367589
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1173285
>> , "function_name": "erts_garbage_collect"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 5369251
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1174947
>> , "function_name": "erts_gc_after_bif_call"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 5871217
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1676913
>> , "function_name": "nbif_3_gc_after_bif"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> } ]
>> }
>> , { "frames":
>> [ { "address": 1101651978
>> , "build_id_offset": 1101651978
>> } ]
>> }
>> , { "frames":
>> [ { "address": 139994957883141
>> , "build_id": "18562ee0363bc9bd7101610bd86469aa426d0c44"
>> , "build_id_offset": 46853
>> , "function_name": "pthread_cond_wait@@GLIBC_2.3.2"
>> , "file_name": "/lib64/libpthread.so.0"
>> }
>> , { "address": 6128777
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1934473
>> , "function_name": "ethr_cond_wait"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 4665919
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 471615
>> , "function_name": "sys_msg_dispatcher_func"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 6134325
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1940021
>> , "function_name": "thr_wrapper"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 139994957868531
>> , "build_id": "18562ee0363bc9bd7101610bd86469aa426d0c44"
>> , "build_id_offset": 32243
>> , "function_name": "start_thread"
>> , "file_name": "/lib64/libpthread.so.0"
>> }
>> , { "address": 139994952778157
>> , "build_id": "23d9f6f74c80c45a602094e5016f047bfc4d046c"
>> , "build_id_offset": 1008045
>> , "function_name": "__clone"
>> , "file_name": "/lib64/libc.so.6"
>> } ]
>> }
>> , { "frames":
>> [ { "address": 139994957894237
>> , "build_id": "18562ee0363bc9bd7101610bd86469aa426d0c44"
>> , "build_id_offset": 57949
>> , "function_name": "read"
>> , "file_name": "/lib64/libpthread.so.0"
>> }
>> , { "address": 5741674
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1547370
>> , "function_name": "signal_dispatcher_thread_func"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 6134325
>> , "build_id": "69494bd95d056f5549e80b6fe507e55af574137f"
>> , "build_id_offset": 1940021
>> , "function_name": "thr_wrapper"
>> , "file_name":
>> "/usr/lib64/erlang/erts-5.10.4/bin/beam.smp"
>> }
>> , { "address": 139994957868531
>> , "build_id": "18562ee0363bc9bd7101610bd86469aa426d0c44"
>> , "build_id_offset": 32243
>> , "function_name": "start_thread"
>> , "file_name": "/lib64/libpthread.so.0"
>> }
>> , { "address": 139994952778157
>> , "build_id": "23d9f6f74c80c45a602094e5016f047bfc4d046c"
>> , "build_id_offset": 1008045
>> , "function_name": "__clone"
>> , "file_name": "/lib64/libc.so.6"
>> } ]
>> }
>> ...
>>
>> Thanks in advance for any suggestions and help,
>> -Gene
>>
>> _______________________________________________
>> erlang-questions mailing list
>> erlang-questions@REDACTED
>> http://erlang.org/mailman/listinfo/erlang-questions
>>
>>
>
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