Re: [EXTERNAL] Re: Switching between SMT-1 and SMT-2

2023-09-06 Thread Dave Barry
As your zIIP utilization approaches 100 percent what you should expect is a corresponding increase in zIIP-on-CP time. That is a system-wide processor optimization technique. It does not deal directly with the subject of WLM workload dispatching priorities. -Original Message- From: IB

Re: [EXTERNAL] Re: Switching between SMT-1 and SMT-2

2023-08-30 Thread Andrew Rowley
On 30/08/2023 10:22 pm, Horne, Jim wrote: Peter, In theory, I agree with you. In practice, I know of at least one shop with one system where overall throughput was worse with SMT=2 than with SMT=1 - and none of their systems got the benefits IBM predicted. I'm not saying it's common but it

Re: [EXTERNAL] Re: Switching between SMT-1 and SMT-2

2023-08-30 Thread Horne, Jim
Peter, In theory, I agree with you. In practice, I know of at least one shop with one system where overall throughput was worse with SMT=2 than with SMT=1 - and none of their systems got the benefits IBM predicted. I'm not saying it's common but it has happened. Jim Horne From: IBM Mainframe