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--- aix [2018/09/14 12:41]
ss_wiki_admin
+++ aix [2019/09/16 16:09] (current)
@@ Line 79: / Line 79: @@
 sar
-== Bind to processor ==
+== Processor Binding ==
-<code>
+<code bash>
-bindprocessor -q\\
+bindprocessor -q
-The available processors are:  0 1\\
+The available processors are:  0 1
-bindprocessor 14662 1\\
+bindprocessor 14662 1
+ps -emo THREAD | grep p1
+#unbind
+bindprocessor -u 14662
 </code>
+== SMT (Simultaneous Multithreading) ==
+You can enable or disable SMT by running the smtctl command.\\
+<code bash>
+smtctl [ -m off | on [ -w boot | now]]
+The following options are available:
+-m off
+    Sets SMT mode to disabled.
+-m on
+    Sets SMT mode to enabled.
+-w boot
+    Makes the SMT mode change effective on next and subsequent restarts if you run the bosboot command before the next system restart.
+-w now
+    Makes the SMT mode change immediately but the change does not persist across restart.
+</code>
+If neither the -w boot or the -w now options are specified, the mode change is made immediately. It persists across subsequent restarts if you run the bosboot command before the next system restart.
+== Processor control ==
+Setting this tunable to a value greater than -1 will enable the scheduler to enable and disable virtual processors based on the partition's CPU utilization.\\
+If vpm_xvcpus is greater than or equal to zero, processor folding is enabled. Otherwise, if it is equal to -1, folding is disabled\\
+Use below command to enable folding:\\
+<code bash>
+schedo -o vpm_xvcpus=0
+//Setting vpm_xvcpus to 0
+schedo -L vpm_xvcpus
+schedo -o vpm_fold_policy=0
+schedo -L vpm_fold_policy
+</code>
+Note: By default processor folding enabled in AIX\\
 == Smitty ==
 [[http://www.redbooks.ibm.com/redpapers/pdfs/redp0105.pdf| AIX System Management Interface Tool (SMIT) Redbook]]

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