1. Progress Report 2015/04/27

2. Last time Working on reducing the Dorm0 energy overhead.

3. Dom0 Energy Overhead Problem ◦ Physical cores are always busy and waste a lot of energy. [Idle: credit] [Idle: asym]

4. Dom0 Energy Overhead(Cont.) Casue: ◦ if( !vcpu_runnable(current) ) // next = idle_vcpu; /* increase Dom0 response time */ next = current; Solution: ◦ figure out how to reduce the extreme long response time using the correct code. ◦ next = idle_vcpu;

5. Current Progress Traced Xen code. Found what’s wrong. Fixed the problem. Reduce the energy overhead.

6. Result - before [Idle: credit] [Idle: asym]

7. Results - after [Idle: credit] [Idle: asym]

8. Other Progress Revise and submit the JDPC paper. Submit the work to CTHPC’15. Coordinate the CHT project. Help revise the COMPSAC paper.

9. Next Keep debugging and optimize the scheduler. ◦ (Rarely) Crash during booting DomU. ◦ (Sometimes) Fail to boot DomU. ◦ Problems while migrating vCPU.