[Ktechlab-devel] Caching in simulator

[Alan Grimes]

P Zoltan wrote:
> On Fri, 13 Nov 2009 19:17:06 +0100, Alan Grimes <agrimes at speakeasy.net>  
> wrote:

>> P Zoltan wrote:
>>>   This mail is more for Alan:

>>>   How does exactly the caching work in the simulator? You've mentioned  
>>> it
>>> one day, but it's workings are not clear for me. Could you explain it
>>> (hopefully document it).
>> Are you referring to LogicCacheNode in circuit.h?

>   Yes, and also there are other members / methods of Circuit class.

>   When I did the Eigen test, I just invalidated all caching. Maybe that was  
> the cause of poor performance?

No, because the logic cache only affects logic components. I think you
diagnosed it correctly when you noticed that Eigen was doing LU
decomposition from scratch, even allocating memory, when ktechlab is
very highly optimized and only does a partial LU...

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