Re: [Gems-users] Miss Latencies

[Marco Solinas <marco.solinas@xxxxxxxxxxxx>]

Hi Mike, and thank you for your answer!

Those values are provided by Ruby when the protocol is MOESI_CMP_NUCA.
My question aimed to understand the meaning of each number: as I wrote 
my own protocol from scratch for a shared L2 NUCA cache, I need to 
distinguish the following cases for miss latency:
1. L1 average miss latency when the block hits in shared L2;
2. L1 average miss latency when the block misses in the shared L2;
3. L2 average miss latency.

So I guess that I need to use those parameters, as shown in MOESI_CMP_NUCA.
Moreover, I want to understand if there is a difference (and eventually 
what this difference is) between:
- miss_latency and miss_latency_L1Cache
- miss_latency_L2Cache and miss_latency_L2Miss
- miss_latency_*** and miss_latency_***_wCC

Thanks a lot!
Marco

Mike Marty ha scritto:
> those are enabled by passing a parameter to hitCallback from the L1 
> controller to the Sequencer.  The individual protocol can track who 
> responds to which request.  I find these very valuable, but I don't 
> recall if I hooked these up for any protocol in the release.
>
>
> On Fri, Apr 18, 2008 at 6:05 AM, Marco Solinas 
> <marco.solinas@xxxxxxxxxxxx <mailto:marco.solinas@xxxxxxxxxxxx>> wrote:
>     Hi list,
>
>     I'm a little confused by the miss latency values in the ruby stats
>     file.
>
>     There are more values for miss latency, each labeled with different
>     names: miss_latency, miss_latency_LD, miss_latency_ST,
>     miss_latency_IFETCH, miss_latency_ATOMIC, miss_latency_L1Cache,
>     miss_latency_L2Cache, miss_latency_Directory,
>     miss_latency_L1Cache_wCC,
>     miss_latency_L2Cache_wCC, miss_latency_L2Miss.
>     I can't understand the meaning of the most part of them (for example,
>     that are L1Cache_wCC and L2Cache_wCC?, what's the difference between
>     L1Cache and L1Cache_wCC, or between L2Cache and L2Cache_wCC? what does
>     miss_latency_Directory represent? and L2Miss?).
>
>     Can anyone please help me?
>     Regards
>     Marco
>
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