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This patch seems ok, but can you hold off on pushing this and other ruby 
related changes until we push our patches. We plan to ship our patches by next 
Friday (07/31).

- Tony Gutierrez


On July 21, 2015, 8:28 a.m., Nilay Vaish wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> http://reviews.gem5.org/r/2985/
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> 
> (Updated July 21, 2015, 8:28 a.m.)
> 
> 
> Review request for Default.
> 
> 
> Repository: gem5
> 
> 
> Description
> -------
> 
> Changeset 10947:f66800e62c22
> ---------------------------
> ruby: message buffer, timer table: significant changes
> 
> This patch changes MessageBuffer and TimerTable, two structures used for
> buffering messages by components in ruby.  These structures would no longer
> maintain pointers to clock objects.  Functions in these structures have been
> changed to take as input current time in Tick.  Similarly, these structures
> will not operate on Cycle valued latencies for different operations.  The
> corresponding functions would need to be provided with these latencies by
> components invoking the relevant functions.  These latencies should also be
> in Ticks.
> 
> I felt the need for these changes while trying to speed up ruby.  The ultimate
> aim is to eliminate Consumer class and replace it with an EventManager object 
> in
> the MessageBuffer and TimerTable classes.  This object would be used for
> scheduling events.  The event itself would contain information on the object 
> and
> function to be invoked.
> 
> In hindsight, it seems I should have done this while I was moving away from 
> use
> of a single global clock in the memory system.  That change led to 
> introduction
> of clock objects that replaced the global clock object.  It never crossed my
> mind that having clock object pointers is not a good design.  And now I really
> don't like the fact that we have separate consumer, receiver and sender
> pointers in message buffers.
> 
> 
> Diffs
> -----
> 
>   src/mem/protocol/MESI_Three_Level-L0cache.sm f48e72961850 
>   src/mem/protocol/MESI_Three_Level-L1cache.sm f48e72961850 
>   src/mem/protocol/MESI_Two_Level-L1cache.sm f48e72961850 
>   src/mem/protocol/MESI_Two_Level-L2cache.sm f48e72961850 
>   src/mem/protocol/MESI_Two_Level-dir.sm f48e72961850 
>   src/mem/protocol/MESI_Two_Level-dma.sm f48e72961850 
>   src/mem/protocol/MI_example-cache.sm f48e72961850 
>   src/mem/protocol/MI_example-dir.sm f48e72961850 
>   src/mem/protocol/MI_example-dma.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_directory-L1cache.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_directory-L2cache.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_directory-dir.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_directory-dma.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_token-L1cache.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_token-L2cache.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_token-dir.sm f48e72961850 
>   src/mem/protocol/MOESI_CMP_token-dma.sm f48e72961850 
>   src/mem/protocol/MOESI_hammer-cache.sm f48e72961850 
>   src/mem/protocol/MOESI_hammer-dir.sm f48e72961850 
>   src/mem/protocol/MOESI_hammer-dma.sm f48e72961850 
>   src/mem/protocol/Network_test-cache.sm f48e72961850 
>   src/mem/protocol/Network_test-dir.sm f48e72961850 
>   src/mem/protocol/RubySlicc_Exports.sm f48e72961850 
>   src/mem/protocol/RubySlicc_Types.sm f48e72961850 
>   src/mem/ruby/network/MessageBuffer.hh f48e72961850 
>   src/mem/ruby/network/MessageBuffer.cc f48e72961850 
>   src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc 
> f48e72961850 
>   src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc 
> f48e72961850 
>   src/mem/ruby/network/simple/PerfectSwitch.cc f48e72961850 
>   src/mem/ruby/network/simple/Switch.cc f48e72961850 
>   src/mem/ruby/network/simple/Throttle.cc f48e72961850 
>   src/mem/ruby/slicc_interface/AbstractController.hh f48e72961850 
>   src/mem/ruby/slicc_interface/AbstractController.cc f48e72961850 
>   src/mem/ruby/slicc_interface/Controller.py f48e72961850 
>   src/mem/ruby/structures/TBETable.hh f48e72961850 
>   src/mem/ruby/structures/TimerTable.hh f48e72961850 
>   src/mem/ruby/structures/TimerTable.cc f48e72961850 
>   src/mem/ruby/system/DMASequencer.cc f48e72961850 
>   src/mem/ruby/system/RubyPort.cc f48e72961850 
>   src/mem/ruby/system/Sequencer.cc f48e72961850 
>   src/mem/slicc/ast/EnqueueStatementAST.py f48e72961850 
>   src/mem/slicc/ast/PeekStatementAST.py f48e72961850 
>   src/mem/slicc/ast/StallAndWaitStatementAST.py f48e72961850 
>   src/mem/slicc/symbols/StateMachine.py f48e72961850 
> 
> Diff: http://reviews.gem5.org/r/2985/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Nilay Vaish
> 
>

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