Charm++ parallel programming system

[Gengbin Zheng <gzheng AT illinois.edu>]

This is for a special case, in standalone mode, by running a binary
without charmrun.
Autobuild is run always with charmrun.

Gengbin

On Mon, Jul 9, 2012 at 6:11 PM, Kale, Laxmikant V 
<kale AT illinois.edu>
 wrote:
> I am curious about this: how did such a bug (in a feature used by probably
> every program? CmiFree) remain undiscovered?
> I am looking for a "process" level answer. I.e. Was this machine layer not
> in our standard autobuild suite?
>
>
> --
> Laxmikant (Sanjay) Kale         http://charm.cs.uiuc.edu
> <http://charm.cs.uiuc.edu/>
> Professor, Computer Science     
> kale AT illinois.edu
> 201 N. Goodwin Avenue           Ph:  (217) 244-0094
> Urbana, IL  61801-2302          FAX: (217) 265-6582
>
>
>
>
>
>
> On 7/8/12 6:03 PM, "Gengbin Zheng" 
> <gzheng AT illinois.edu>
>  wrote:
>
>>Looks like you are running in standalone mode of SMP.
>>I don't think it is thoroughly tested, but I just fixed the CmiFree
>>for standalone mode. Please try again.
>>
>>Gengbin
>>
>>
>>On Sun, Jul 8, 2012 at 5:49 PM, Tom Quinn 
>><trq AT astro.washington.edu>
>>wrote:
>>> I'm running an ibverbs standalone for debugging, but I don't get very
>>>far
>>> because of a segfault.  valgrind reports the following.
>>>
>>> Line 2529 of machine-ibverbs.c has a simple
>>>
>>>   if (Cmi_charmrun_fd == -1) return malloc(size);
>>>
>>> whereas infi_CmiFree() assumes the pointer has been advanced to allow
>>>for
>>> the header.
>>>
>>> Charm++> Running on 1 unique compute nodes (16-way SMP).
>>> ==10120== Invalid read of size 8
>>> ==10120==    at 0x77CB4E: infi_CmiFree (machine-ibverbs.c:2641)
>>> ==10120==    by 0x7843E6: CmiFree (convcore.c:2945)
>>> ==10120==    by 0x79E287: cpuTopoHandler(void*) (cputopology.C:265)
>>> ==10120==    by 0x784DB2: CmiSendReduce (convcore.c:2363)
>>> ==10120==    by 0x784C1B: CmiGlobalReduce (convcore.c:2383)
>>> ==10120==    by 0x78478C: CmiReduce (convcore.c:2405)
>>> ==10120==    by 0x79FE15: LrtsInitCpuTopo (cputopology.C:559)
>>> ==10120==    by 0x79F805: CmiInitCPUTopology (cputopology.C:629)
>>> ==10120==    by 0x693B4D: _initCharm(int, char**) (init.C:1264)
>>> ==10120==    by 0x780EC4: ConverseInit (machine.c:2881)
>>> ==10120==    by 0x6B0566: main (main.C:18)
>>> ==10120==  Address 0x5a38648 is 8 bytes before a block of size 68
>>>alloc'd
>>> ==10120==    at 0x4A0776F: malloc (vg_replace_malloc.c:263)
>>> ==10120==    by 0x77CA1D: infi_CmiAlloc (machine-ibverbs.c:2529)
>>> ==10120==    by 0x784320: CmiAlloc (convcore.c:2844)
>>> ==10120==    by 0x79FDB0: LrtsInitCpuTopo (cputopology.C:550)
>>> ==10120==    by 0x79F805: CmiInitCPUTopology (cputopology.C:629)
>>> ==10120==    by 0x693B4D: _initCharm(int, char**) (init.C:1264)
>>> ==10120==    by 0x780EC4: ConverseInit (machine.c:2881)
>>> ==10120==    by 0x6B0566: main (main.C:18)
>>>
>>>
>>> Tom Quinn       Astronomy, University of Washington
>>> Internet:       
>>> trq AT astro.washington.edu
>>> Phone:          206-685-9009
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