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accel-sim / accel-sim-framework

This is the top-level repository for the Accel-Sim framework.
https://accel-sim.github.io
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Some questions of MEM_ACCESS_TYPE_TUP_DEF #252

Closed ConvolutedDog closed 8 months ago

ConvolutedDog commented 1 year ago

Hi, sorry to bother you.

I recently ran into some problems with memory access when reading the source code MEM_ACCESS_TYPE_TUP_DEF:

MA_TUP(L1_WRBK_ACC), MA_TUP(L2_WRBK_ACC), MA_TUP(L1_WR_ALLOC_R), MA_TUP(L2_WR_ALLOC_R)

I would like to kown what exactly these four types of memory access mean, are they "L1 write back access", "L2 write back access", "L1 write acclocation read", and "L2 write back allocation read"?

And I would like to kown under what circumstances they are used, or whether there are related papers or blogs or books that can help me understand this.

JRPan commented 1 year ago

Yes you are correct about the names. These are mainly for bookkeeping. And also in L2 these are used to determine the states of the access. For more about allocation policies, you can read Section III in https://arxiv.org/pdf/1810.07269.pdf. I would recommend reading the entire paper.

Thanks, Junrui