• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 436
  • Last Modified:

AIX: Variable SMTP mode

I understand there is a mode in AIX in which the OS can detect the optimal number of threads,and vary the SMTP accordingly

What is this called.  How do I perform that .

Is this the default behavior

Thanks
0
Anthony Lucia
Asked:
Anthony Lucia
1 Solution
 
woolmilkporcCommented:
With POWER8 CPUs AIX will dynamically adjust between SMT and ST (single thread)  mode based on the workload utilization.
There is nothing you must do.

On POWER7(+) processors there is a feature called Scaled Throughput mode.  In this mode, more or all SMT threads on a given core or Virtual Processor will be utilised before dispatching workload to other VPs/cores.

You can enable this with

schedo –o vpm_throughput_mode=n

There are five modes 0-4 for "n".
Use "schedo -h vpm_throughput_mode" to learn more.
Quote: "A higher value will result in fewer cores being unfolded for a given workload".
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now