VM bug Mantis 4709 (was Re: [Seaside] Squeak 3.9?)

Keith Hodges keith_hodges at yahoo.co.uk
Tue Mar 20 14:59:28 UTC 2007


Another data point on the frozen images:

#uname -a

Linux Knoppix 2.6.19 #7 SMP PREEMPT Sun Dec 17 22:01:07 CET 2006 i686 
GNU/Linux


My frozen image give me this backtrace:

(gdb) backtrace
#0 0xb7e5d8e5 in nanosleep () from /lib/libc.so.6
#1 0x08070b58 in aioSleep (microSeconds=-1080448704) at 
/home/piumarta/squeak/platforms/unix/vm/aio.c:281
#2 0xb7f50466 in display_ioRelinquishProcessorForMicroseconds 
(microSeconds=1000)
at /home/piumarta/squeak/platforms/unix/vm-display-X11/sqUnixX11.c:2317
#3 0x0805921d in ioRelinquishProcessorForMicroseconds (us=-516) at 
/home/piumarta/squeak/platforms/unix/vm/sqUnixMain.c:471
#4 0x0805f334 in primitiveRelinquishProcessor () at 
/home/piumarta/squeak/platforms/unix/src/vm/interp.c:17833
#5 0x0806dc25 in interpret () at 
/home/piumarta/squeak/platforms/unix/src/vm/interp.c:7756
#6 0x0805aae2 in main (argc=2, argv=0xbf99bc94, envp=0xfffffdfc)
at /home/piumarta/squeak/platforms/unix/vm/sqUnixMain.c:1388

> On Feb 15, 2007, at 07:53 , Keith Hodges wrote:
>
>> I found that using vm 3.6-3 solved my instability freezing issues 
>> with 3.9
>
> Interesting..
>
> I thought your image freezing might be related to the VM bug reported 
> here: http://bugs.impara.de/view.php?id=4709. However, some tests I 
> did recently show that the bug does not depend on the VM version but 
> on the Linux kernel version 2.6.
>
> 1 - Squeak 3.9-9 VM, Linux 2.6 BUG
> 2 - Squeak 3.6-3 VM, Linux 2.6 BUG
> 3 - Squeak 3.7b-5 VM, Linux 2.4 OK
> 4 - Squeak 3.9-9 VM, Linux 2.4 OK
>
> I updated the Mantis report with more details.
>
> John, I tried what you suggest in this mail 
> http://lists.squeakfoundation.org/pipermail/seaside/2006-September/008981.html. 
> I attached the gc stats files to the Mantis report.
>
> Keith, could you provide a gdb backtrace of a frozen image? Do you 
> also see the problem when running with -mmap?
>
> Cheers,
> Adrian
>


		
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