[erlang-bugs] Strange Memory Allocation Crash
Wed Jul 7 14:15:59 CEST 2010
On 2010-07-07 14:11, Björn-Egil Dahlberg wrote:
> The error_logger can't consume the info messages you send at the rate
> that that tight loop produces them.
> <0.5.0> error_logger Garbing (limited info) 27440736 182452560 7557980
That is 7557980 messages in the msq-queue.
To answer your question, use the crashdump viewer to examine crash dump
you just got.
Eshell V5.8.1 (abort with ^G)
WebTool is available at http://localhost:8888/
> On 2010-07-07 13:27, wrote:
>> While try to do a quick check on which floats need to be rounded before
>> trunking them to get valid results, I was able to crash the Erlang VM.
>> I find
>> it a bit strange as it happened rather quickly into something that I
>> shouldn't be that intensive. I have tried this twice, and was
>> wondering if
>> this could be pointing to something else as a problem.
>> Machine Info
>> :~/sdb/work/gf_olympus/troy/trunk/tmp> uname -a
>> Linux greyowl 18.104.22.168-0.2-default #1 SMP 2010-03-16 21:25:39 +0100
>> x86_64 x86_64 GNU/Linux
>> :~/sdb/work/gf_olympus/troy/trunk/tmp> erl --version
>> Erlang R14A (erts-5.8) [source] [64-bit] [smp:2:2] [rq:2]
>> [hipe] [kernel-poll:false]
>> ============== CODE START
>> do() ->
>> do(100.0) ->
>> do(Value) ->
>> if trunc(Value * 100) =:= trunc(round(Value * 100)) ->
>> do(Value + 0.01);
>> true ->
>> error_logger:info_msg("Value: ~p~n", [Value]),
>> do(Value + 0.01)
>> ============== CODE END
>> The final result. (After 280 iterations of the function the following
>> =INFO REPORT==== 7-Jul-2010::11:33:07 ===
>> Value: 2.7999999999999843
>> Crash dump was written to: erl_crash.dump
>> eheap_alloc: Cannot allocate 20672 bytes of memory (of type "heap").
>> The code is attached
>> I am a bit at a loss as to where to start troubleshooting this :)
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