1. Fine-grained vs Coarse-grained multithreading
Joel Kamdem Teto
Fine-grained vs Coarse-grained multithreading

2. What is multithreading ?z
What is multithreading ?
Types of multithreading ?
Introduction

3. Fine-grained Multithreading
The ability of a single core to handle multiple thread by:
Providing a register for each thread
Dividing the pipeline bandwidth into N part
Executing one thread different at every execution cycle

4. Fine-grained multithreading
The Advantages provided by such architecture are :
fairness of resources
Easiness to implement
High processor utilization (In case of many thread)

5. Fine-grained multithreading
Some Disadvantage link to this architecture are:
Complicated hardware
Multiple contexts (states) to keep in memory
limits single thread performance
Costly

6. Fine-grained multithreadingz
Fine-grained multithreading
Architecture of a pipeline
Program counter for each threads
A thread selector for context switch
General purpose Registers for each thread

7. Fine-grained Multithreadingz z
Fine-grained Multithreading

8. Coarse-grained Multithreading
definition

9. Coarse-grained Multithreading
Advantages
decreases vertical waste
supports long latency
Does not sacrifice single-thread performance
There is less hardware duplicate.

10. Coarse-grained Multithreading
Disadvantages
Load imbalance
Possible context switch overhead
Inefficient with a big number of threads along with short latency

11. z z
SUMMARY

12. Thank you.