[petsc-users] Obtaining bytes per second

[Jed Brown]

Matthew Knepley <knepley at gmail.com> writes:

> On Thu, May 7, 2015 at 1:32 PM, Jed Brown <jed at jedbrown.org> wrote:
>
>> Matthew Knepley <knepley at gmail.com> writes:
>> > You are making assumptions about the algorithm here. Pure streaming
>> > computations, like VecAXPY do not depend on the cache model.
>>
>> I thought we were talking about Krylov solvers, which includes MatMult.
>>
>
> Yes, and in the earlier mail I said to just use the model in Dinesh's
> paper so he did not have to worry about this one.

That is a cache model (analogous to "perfect cache" in the pTatin
paper).  So don't claim you have no cache model.
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