On 9/4/2020 9:15 AM, Michael Babcock wrote:
Anyone using their zIIPs with the multithread parm in IEAOPTxx? Is that
per LPAR or per zIIP? Meaning if I enable it in one LPAR is it enabled on
all LPARs?
What are the ramifications of enabling it and does it provide much benefit?
Like all parmlib members, IEAOPTxx is processed one LPAR at a time.
The benefit of two threads is better overall utilization of the zIIP
core, but with slower per-thread speed (~70% instead of 100%).
IMHO, if you need additional zIIP capacity for a production workload, it
probably makes more sense to configure another zIIP core online than it
does to enable MT=2.
--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
https://www.phoenixsoftware.com/
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