Hello all,
I am a little confused about the latency and Tick units used for
calculations in the dram.cc, using v2beta4. If I understand correctly, all dram
latency parameters (like cas_lat) are in nanoseconds, while variables like
time_since_last_access, currTick are of type Tick (which I assume runs at 1THz
simticks speed).
So If we are using these together, shouldnt there be some scaling factor of
1000 in the expression. I am referring to the following calculations done in
dram.cc:
...
overlap=(int)(busy_until[current_bank] - curTick);
...
...
corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */
....
....
....
else/*in between case*/
{
lat = cas_lat-corrected_overlap;
overlap and corrected_overlap are converted to (int) but doesnt the value still
represent time in picoseconds? whereas lat is in nanos.
Or this:
----------
total_arb_latency += (busy_until[current_bank]
- curTick - lat
- timing_correction);
Again, except lat, it seems like other variables are all in picoseconds.
I would really appreciate your help on this.
Thanks,
Sujay
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