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Ship it!


Ship It!

- Steve Reinhardt


On Oct. 19, 2015, 8:08 a.m., Andreas Hansson wrote:
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> http://reviews.gem5.org/r/3153/
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> (Updated Oct. 19, 2015, 8:08 a.m.)
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> 
> Review request for Default.
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> Repository: gem5
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> Description
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> Changeset 11176:3a4d9e14ae5d
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> mem: Order packet queue only on matching addresses
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> Instead of conservatively enforcing order for all packets, which may
> negatively impact the simulated-system performance, this patch updates
> the packet queue such that it only applies the restriction if there
> are already packets with the same address in the queue.
> 
> The basic need for the order enforcement is due to coherency
> interactions where requests/responses to the same cache line must not
> over-take each other. We rely on the fact that any packet that needs
> order enforcement will have a block-aligned address. Thus, there is no
> need for the queue to know about the cacheline size.
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> 
> Diffs
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>   src/mem/packet_queue.hh 3a4d1b5cd05c 
>   src/mem/packet_queue.cc 3a4d1b5cd05c 
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> Diff: http://reviews.gem5.org/r/3153/diff/
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> 
> Testing
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> 
> Thanks,
> 
> Andreas Hansson
> 
>

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