Introducing the Delay Queue

[rommelsv]

Implementation of the Delay Queue, an extra delay for all memory transactions in the memory controller.

[shavvn]

The delayedInfo class definition seems to be missing. Can you make sure you included all the changes made in order to build the code successfully? Thanks!

[rommelsv]

Hi Shawn.
I've committed it. Sorry for the inconvenience.

[shavvn]

Hi @rommelsv ,

Thanks for the patch.

I was able to build after your commit. But I think there's still some problems that I can see now:

1. There's no default parameter provided for DQ_DEPTH, which I assume will be in sys.ini, right?

2. I tried to add a DQ_DEPTH=20 to sys.ini and ran a few experiments, but it doesn't look like the program took it as an input. I think it should be included in configmap of IniReader.cpp. (I saw you had it but somehow commented it out?)

[rommelsv]

HI Shavvn,
Are you testing with traces?
We implemented the Delay Queue (DQ) as part of this integration with a CPU simulator. So it is only visible right now from the DRAMSim2 perspective if the libdramsim is used.
Moreover, if DQ_DEPTH is not present in the sys config file, a value of 0 is considered and the logic is the same as without the patch.
But if is present, DQ comes to place when the actual_update() function is called.
We designed it like this to avoid noise with the current DRAMSim2 users. This way, they can still use the simulator without the effects of the DQ.