memcpy improvement

[SunnyRaj]

Goal:

• How much improvement do we get using memcpy instead of writev

Apps/workloads:

• Httperf / PARSEC

Metrics:

• Total time VM is suspended
• throughput / latency.

Graphs:

• Checkpoint vs. total VM suspend time
• Performance improvement in throughput/latency for different workload (constant checkpoint)