aix:virtual_cpu
Differences
This shows you the differences between two versions of the page.
| Next revision | Previous revision | ||
|
aix:virtual_cpu [2021/01/01 21:21] 127.0.0.1 external edit |
aix:virtual_cpu [2021/04/02 21:32] (current) manu |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| ====== Power Processor ====== | ====== Power Processor ====== | ||
| - | On IBM Power server, **a processor is a core**. A core is located on MCM (multichip module) which currently contain 8 cores. On Power server the performance of a server is (nb cores) x (perf/core), it's linear different from x86 cores. | + | On IBM Power server, **a processor is a core**. A core is located on MCM (multichip module) which currently contain 8 cores... up to 20 cores. On Power server the performance of a server is (nb cores) x (perf/core), it's linear different from x86 cores. |
| ===== Virtual Processor / Physical Processor ====== | ===== Virtual Processor / Physical Processor ====== | ||
| Line 15: | Line 15: | ||
| ** <color red>My recommandations:</color> ** | ** <color red>My recommandations:</color> ** | ||
| - | Use always shared processors and uncapped option with default value for LPAR (or adjust to the LPAR use), and 191 for VIOS. | + | Use always shared processors and uncapped option with default value for LPAR (or adjust to the LPAR use), and 255 for VIOS (maximum priority, if VIOS are high loaded, all partitions will have performance issues). |
| Line 49: | Line 49: | ||
| {{:aix:power_proc1.png|}} | {{:aix:power_proc1.png|}} | ||
| + | ===== CPU at LPAR level ===== | ||
| + | Check multithreading, and core frenquency | ||
| + | <cli prompt='#'> | ||
| + | [root@prnim01]/root# lsattr -El proc0 | ||
| + | frequency 2500000000 Processor Speed False | ||
| + | smt_enabled true Processor SMT enabled False | ||
| + | smt_threads 8 Processor SMT threads False | ||
| + | state enable Processor state False | ||
| + | type PowerPC_POWER9 Processor type False | ||
| + | </cli> | ||
| + | |||
| + | Check CPU on LPAR | ||
| + | <cli prompt='#'> | ||
| + | [root@prnim01]/root# lparstat -i | grep CPU | ||
| + | Online Virtual CPUs : 2 | ||
| + | Maximum Virtual CPUs : 2 | ||
| + | Minimum Virtual CPUs : 1 | ||
| + | Maximum Physical CPUs in system : 10 | ||
| + | Active Physical CPUs in system : 10 | ||
| + | Active CPUs in Pool : 10 | ||
| + | Shared Physical CPUs in system : 10 | ||
| + | Physical CPU Percentage : 5.00% | ||
| + | Desired Virtual CPUs : 2 | ||
| + | </cli> | ||
aix/virtual_cpu.1609532495.txt.gz ยท Last modified: 2021/01/01 21:21 by 127.0.0.1
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: GNU Free Documentation License 1.3
