1. GEM5 Assignment 2016

2. MOTO Architecture Exploration in Multicore Processors

3. Two Phases Assignment There will be two phases and two deadlines!
Phase 1 due on 8th Jan.
No late submission will be approved

4. Two Phases Assignment There will be two phases and two deadlines!
Phase 1 due on 8th Jan.
No late submission will be approved
Phase 2 will due on 22nd Jan.
Requires more effort

5. Assignment Phase 1
Optimizing the System Cache

6. JPEG Compression
ARM A9
ARM A15

7. Modify Cache Size & Associativity
JPEG Compression
ARM A9
ARM A15
Modify Cache Size & Associativity

8. JPEG Compression ARM A9 ARM A15 Modify Cache Size & Associativity
Trade Off : Cost vs Performance

9. Getting Started Download gem.ovf. Import it to your virtualbox.
Ubuntu is installed.
Username & Password : eca
Check folders “gem5”, “arm_apps” & “jpeg” in home directory.
Find jpeg source file in /home/eca/jpeg/jpeg_6a.

10. Gem5 Configuration File
Found in /home/eca/gem5/configs/example.
First use armA9.py for ARM A9.
Later modify this configuration file for ARM A15.

11. Compiling for ARM Compiling “helloworld.c”
arm-linux-gnueabi-gcc helloworld.c -static -lc -o helloworld
Use makefile for compiling jpeg source code.
make –f Makefile.arm
Directory should be /home/eca/jpeg/jpeg_6a

12. Running Applications Requires (a) gem5 configuration file
(b) binary of the application
Use the following command from home directory.
/home/eca/gem5/built/ARM/gem5.opt PATH TO CONFIG FILE -c PATH TO BINARY FILE

13. Assignment Phase 2
Mapping the JPEG Compression on Multicore CPU Systems

14. JPEG Compression
ARM A9
ARM A9
ARM A9

15. JPEG Compression Which one is better? ARM A15 ARM A9 ARM A9 ARM A9

16. You will answer after phase2!
JPEG Compression
ARM A9
ARM A9
ARM A9
ARM A15
ARM A9
You will answer after phase2!

17. Multithreading

18. Multithreading pthread_create pthread_exit pthread_join
pthread_mutex_init
pthread_mutex_lock
pthread_mutex_unlock

19. Resources
Assignment details and guideline