Re: [Gems-users] Ruby DataBlock

[Dan Gibson <degibson@xxxxxxxx>]

Do you need to know the data that resides in the cache, or do you need 
to know the *correct* value of the data at a given moment?
The latter can be obtained by the SIMICS_read_physical_memory() API. The 
former will require reviving the somewhat deprecated DATA_BLOCK flag... 
I'm not sure who to ask about that.
Regards,
Dan

Robert William Havlik wrote:

> Hello,
>   I am trying to look at the data values within the cache lines with Ruby.  When I try to set DATA_BLOCK to true in rubyconfig.defaults, I get the following error when I run anything:
>
> failed assertion 'SIMICS_check_memory_value(m_proc, mem_trans->s.physical_address, buffer, mem_trans->s.size)' at fn void SimicsProcessor::observeMemoryAccess(memory_transaction_t*) in simics/SimicsProcessor.C:493
> failed assertion 'SIMICS_check_memory_value(m_proc, mem_trans->s.physical_address, buffer, mem_trans->s.size)' at fn void SimicsProcessor::observeMemoryAccess(memory_transaction_t*) in simics/SimicsProcessor.C:493
> At this point you might want to attach a debug to the running and get to the
> crash site; otherwise press enter to continue
> PID: 15562
>
> When I looked at some of the other forum posts, I decided to try commenting the assert that fails above, when I comment this, I get:
>
> [cpu0 info] Got exception 0x34 at (MAXTL - 1) - entering RED_state
> Write to unimplemented ASI 0x60, VA 0x0, data 0x0
> [cpu0 info] Got exception 0x32 at MAXTL - entering error_state
> [cpu0 info] Triggering watchdog reset to end error_state
> error_state entered
> [cpu0] v:0xfffffffff0000040 p:0x7fff0000040  stxa %g0, [%g0 + %g0] 0x60  # ASI_IIU_INST_TRAP
>
> Does anyone have any ideas to get the DATA_BLOCK setting to work, or know of another way to look at the data within a cache line.  Thanks!
>
>  -Rob
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