Re: [Gems-users] Running GEMS on Linux/SPARC target

[Dan Gibson <degibson@xxxxxxxx>]

I suspect the issue arises because of the UltraSPARC-II processor model 
used by the bagel target vs. the UltraSPARC-III+ processor used by the 
sarek (serengeti) processor model. USIII+ has more registers than USII, 
and the LogTM "context save"/"context restore" code is very heavily tied 
to a particular processor model.
For non-LogTM operation, GEMS should behave normally.

Regards,
Dan Gibson

Shougata Ghosh wrote:
> Hi
> Are there any issues with running GEMS with a Linux/Sparc target 
> machine? I am simulating a 16-processor sparc machine in simics (using 
> their bagle script) and was trying to run the transactional 
> microbenchmark (tm-dequeue) that comes with GEMS. I loaded ruby module 
> but not opal since I'm only concerned with the memory access patterns. I 
> used the "MESI_SMP_LogTM_directory" cache protocol. I am giving a 
> screenshot of the error I got:
> simics> run-command-file file = setup_ruby.sh
> Turning D-STC off and flushing old data
> successful installation of the ruby timing model.
> Ruby Timing Mode
> Warning: optimizations not enabled.
> Creating event queue...
> Creating event queue done
> Creating system...
>   Processors: 16
> Creating system done
> Ruby initialization complete
> simics> c
> <****The following of course came after starting the tm-deque program****>
> [cpu17] v:0x0000000000010bd8 p:0x0000000004f2ebd8  magic (sethi 0x40000, 
> %g0)
> Setting new inspection cpu: cpu17
> simics> c
> Exception in hap handler: Non-existent Register
> Exception in hap handler
> [cpu17] v:0x000000000001098c p:0x0000000004f2e98c  magic (sethi 
> 0x140000, %g0)
> simics>
>
> The first signs of problems is ofcourse cpu17. No idea where that came 
> from with 16 processors! Before I investigate the problem any further, I 
> wanted to figure out if there are any known issues with running 
> transactional benchmarks using magic instructions with Linux/Sparc 
> setup. I know it has been made to work with Solaris/Sparc setup. Does it 
> not run on Linux/Sparc machines? Has anyone tried using magic 
> instructions with Linux/Sparc setup? Any feedback will be really useful.
> Thanks
>
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