We have tested the patched kernel on one network intensive (high packet) workload with max_cstate=1 and ondemand governor disabled and it has lower network throughput than the default kernel had with intel_pstate=enable. There also appears to be a futex performance issue with the c4.8xlarge which we are still investigating and may be contributing to the problem.
We have tested the patched kernel on one network intensive (high packet) workload with max_cstate=1 and ondemand governor disabled and it has lower network throughput than the default kernel had with intel_pstate= enable. There also appears to be a futex performance issue with the c4.8xlarge which we are still investigating and may be contributing to the problem.