Running things in gem5

Non-code-based execution

• Traffic generators
  • Show how to connet
  • Maybe an assignment

SE mode

• What’s needed for SE mode
  • SE mode uses the host for many things
  • Demonstrate that printf takes 0 time in gem5?
  • Maybe an example where you see the size of a file and/or list a directory to show that gem5 is using the host FS
  • Show the syscall implementation in src/sim/syscall..
• SE mode file services and redirects

m5 magic utility

• How magic instructions work (and why magic instructions)
• How to build the library
• How to link to it
• How to build the utility (to be used in FS mode…)
• Might want to look at where they are implemented.

Cross compiling from one arch to another

Building gem5 for different ISAs

• x86
• Arm
• RISC-V
• Also, PPC/SPARC

How to change the parameters of sim object

• mentioned by Jason
• e.g., traffGen

Other things not covered

• How to use traces
  • Run a workload, save the memory trace
  • Replay the memory trace
• SE mode drivers
• SE mode page tables/mmap

---