Re: [Chromium-users] Crash with multitile-sort

[Paul M. <p.e...@ru...>]

Brian Paul wrote:

> Paul Melis wrote:
>
>> Brian Paul wrote:
>>
>>> Paul Melis wrote:
>>>
>>>> Paul Melis wrote:
>>>>
>>>>
>>>>> Hello,
>>>>> While attempting to create a multi-tilesort configuration based on 
>>>>> the multitilesort.conf file included with CR1.9 two things happen:
>>>>> 1. I get a warning about the state tracker being re-initialized
>>>>> 2. One of the crservers crashes (backtrace from the coredump shows 
>>>>> it to be in crSPUCopyDispatchTable()).
>>>>>
>>>>>
>>>>
>>>> Just a bit more info, the crash is happening in 
>>>> spu_loader/spucopy.c, crSPUCopyDispatchTable().
>>>> In the first for-loop, the assignment temp = dst->copy_of->copyList 
>>>> sets temp to 0x1, which is later used as temp->copy.
>>>>
>>>> #0  0x5557f040 in crSPUCopyDispatchTable (dst=0x80d62c0, 
>>>> src=0x817d8c8) at spucopy.c:630
>>>> 630                             if (temp->copy == dst)
>>>> (gdb) bt
>>>> #0  0x5557f040 in crSPUCopyDispatchTable (dst=0x80d62c0, 
>>>> src=0x817d8c8) at spucopy.c:630
>>>> #1  0x08087fc5 in crStateDiffAPI (api=0x817d8c8) at state_flush.c:33
>>>> #2  0x080515e0 in crServerInit (argc=1, argv=0xffffd494) at 
>>>> server_main.c:240
>>>> #3  0x08051655 in CRServerMain (argc=1, argv=0xffffd494) at 
>>>> server_main.c:254
>>>> #4  0x08051012 in main (argc=1, argv=0xffffd494) at main.c:22
>>>> (gdb) p temp
>>>> $1 = (struct _copy_list_node *) 0x1
>>>> (gdb) p dst->copy_of
>>>> $2 = (struct _spu_dispatch_table *) 0xffffa520
>>>> (gdb)
>>>
>>>
>>>
>>>
>>> The demo was crashing for me too, but in a different way. I've 
>>> checked in fixes to tilesortspu_get.c and state_bufferobject.c that 
>>> fixed things here.  Can you try the current CVS code?
>>
>>
>>
>> I'm sorry to say it doesn't fix the crash I'm experiencing. The stack 
>> trace above is still valid. I've attached a reduced version of my 
>> original configuration script. This shows the crash for me when 
>> running with e.g. "python multitilesort_crash.conf glxgears", but 
>> other apps fail in the same way.
>>
>> I had some trouble figuring out how exactly to set up the tiling 
>> parameters for this setup, so I might be doing something unusual there.
>
>
> Hmmm, works for me.
>
> What's the setting of RELEASE and THREADSAFE in your options.mk file?

Both are 0.
I (now) guess that threadsafe should be turned on in case multiple 
instances of the same SPU are run on the same system?

Paul

-- 
Paul Melis

VR Specialist,
Center for High-Performance Computing & Visualization,
University of Groningen,
The Netherlands

T: +31 50 363 9298
E: p.e...@ru...
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