4.FAQ

Table of Contents generated with DocToc

• MacSim Clock Domain
  • How to setup clock
  • Tips

#Macsim#

MacSim Clock Domain

MacSim has 5 different clock domains: CPU cores, GPU cores, L3 cache tiles, Interconnection, and Memory controllers.

How to setup clock

There are 5 corresponding knob parameters.

clock_cpu
clock_gpu
clock_l3
clock_noc
clock_mc

The value can be integer or float (in GHz). All float numbers will be rounded to one decimal place. Therefore, 1.443 GHz will be treated as 1.4 GHz.

Tips

1. If you are running CPU-only or GPU-only simulations, please set clock_cpu and clock_gpu to same values

---

#SST

##MemHierarchy

Q) where the memory latency is measured?

MESICoherenceController.cc::printStatsForMacSim

Q) Difference between L1 cache and others? (from Hyojong)

Assumption is somewhat different. Like, L1 is supposed to have core node above; and cache or memory node below it. while non-L1 can have cache above it. By having separate code for L1 the code can be much simpler than the code for non-L1. Also, L1 is assumed to be inclusive, while non-L1 can be non-inclusive or exclusive. There are many cache parameters that can be simplified for L1 cache. And controller behavior can be made simpler for L1 than non-L1.

---

#Git

Some tips for using Git

Q. How to check which branches/repo that current local copy?

git remote -v

Q. Good git command summaries here