[erlang-bugs] mnesia disc_copies memory size corrupts w/HiPE 64-bit

[Anders Nygren]

On Fri, Jun 25, 2010 at 3:19 PM, Anders Nygren <anders.nygren@REDACTED> wrote:
> Hi
> Was there any resolution to this?

Newermind, I found it, OTP-8377

/Anders

> We are running into the same thing on Solaris 10 x86 with OTP13B02-1
> 32 bit
>
> $gcc -v
> Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.10/3.4.3/specs
> Configured with:
> /builds/sfw10-gate/usr/src/cmd/gcc/gcc-3.4.3/configure
> --prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as
> --with-ld=/usr/ccs/bin/ld --without-gnu-ld --enable-languages=c,c++
> --enable-shared
> Thread model: posix
> gcc version 3.4.3 (csl-sol210-3_4-branch+sol_rpath)
>
> Any chance that upgrading to R13B04 would help?
>
> /Anders
>
> On Wed, Aug 19, 2009 at 6:53 PM, Paul Fisher <pfisher@REDACTED> wrote:
>> I have a mnesia table that is defined as disc_copies, which ends up with a
>> corrupt memory size value after being updated from concurrent (erlang)
>> processes from code compiled with HiPE.  All updates to the table are done
>> as mnesia:transaction/1 calls.
>>
>> If I update the table from only two processes the memory size is correct:
>>
>> (emacs@REDACTED)2> mnesia:table_info(clu_unassignedq,size).
>> 0
>> (emacs@REDACTED)3> mnesia:table_info(clu_unassignedq,memory).
>> 90
>>
>> After updating the table via 11 processes, the table size ends up zero, but
>> memory size is completely bogus:
>>
>> (emacs@REDACTED)10> mnesia:table_info(clu_unassignedq,size).
>> 0
>> (emacs@REDACTED)11> mnesia:table_info(clu_unassignedq,memory).
>> 2305843009213693459
>>
>> If the same thing is done with the code calling the mnesia operations is
>> *not* compiled with HiPE, all is well and everything appears correct.
>>
>> This appears to be an artifact of the SMP/ets concurrency improvements
>> introduced in R13. Thoughts for further investigation?
>>
>> Platform is amd64 (intel core 2) on opensolaris.  Erlang R13B02 snapshot
>> from 2009/08/12.
>>
>> pfisher@REDACTED:~/lm/third_party/erlang-R13/install/solaris$ gcc -v
>> Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.11/3.4.3/specs
>> Configured with: /builds2/sfwnv-gate/usr/src/cmd/gcc/gcc-3.4.3/configure
>> --prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as
>> --with-ld=/usr/ccs/bin/ld --without-gnu-ld --enable-languages=c,c++,f77,objc
>> --enable-shared
>> Thread model: posix
>> gcc version 3.4.3 (csl-sol210-3_4-20050802)
>>
>>
>> --
>> paul
>>
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>>
>