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IBM IntelliStation POWER 285 Technical Overview and Introduction
-w now
This option makes the simultaneous multithreading mode change
immediately but will not persist across a reboot. If neither the
-w boot
nor the
-w now
options are specified, the mode change is made
immediately. It will persist across subsequent reboots if you run the
bosboot
command before the next system reboot.
If no options are specified, the following simultaneous multithreading settings will be reported:
SMT Capability
Indicator that the physical or virtual processors are capable of
simultaneous multithreading.
SMT Mode
Current run time simultaneous multithreading mode of disabled or
enabled.
SMT Boot Mode
Current boot time simultaneous multithreading mode of disabled or
enabled.
SMT Threads
Number of simultaneous multithreading threads per physical or virtual
processor.
SMT Bound
Indicator that the simultaneous multithreading threads are bound on
the same physical or virtual processor.
To enable simultaneous multithreading for the current boot cycle, enter:
smtctl -m on -w now
The system displays a message similar to the following message:
smtctl: SMT is now enabled.
To view the current simultaneous multithreading mode settings and processor information,
enter this command:
smtctl
The system displays a message similar to the message in Example 4-1.
Example 4-1 Output from smtctl command
This system is SMT capable.
SMT is currently enabled.
SMT boot mode is set to disabled.
proc0 has 2 SMT threads
Bind processor 0 is bound with proc0
Bind processor 1 is bound with proc0
proc2 has 2 SMT threads
Bind processor 2 is bound with proc2
Bind processor 3 is bound with proc2
To disable simultaneous multithreading for the current boot cycle and for all subsequent
boots, enter:
smtctl -m off
