SMT enabled? 2

[gatetec]

I believe my system is SMT enabled already as the smtctl output shows below. Please let me know if that is not case. Is there anything I need to double-check?

Thanks much

# smtctl

This system is SMT capable.

SMT is currently enabled.

SMT boot mode is not set.
SMT threads are bound to the same virtual processor.

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


proc4 has 2 SMT threads.
Bind processor 4 is bound with proc4
Bind processor 5 is bound with proc4


proc6 has 2 SMT threads.
Bind processor 6 is bound with proc6
Bind processor 7 is bound with proc6


proc8 has 2 SMT threads.
Bind processor 8 is bound with proc8
Bind processor 9 is bound with proc8


proc10 has 2 SMT threads.
Bind processor 10 is bound with proc10
Bind processor 11 is bound with proc10


proc12 has 2 SMT threads.
Bind processor 12 is bound with proc12
Bind processor 13 is bound with proc12


proc14 has 2 SMT threads.
Bind processor 14 is bound with proc14
Bind processor 15 is bound with proc14


proc16 has 2 SMT threads.
Bind processor 16 is bound with proc16
Bind processor 17 is bound with proc16


proc18 has 2 SMT threads.
Bind processor 18 is bound with proc18
Bind processor 19 is bound with proc18

 

[p5wizard]

The answer is in your post:

# smtctl

This system is SMT capable.

[green]SMT is currently enabled.[/green]

[red]SMT boot mode is not set.[/red]

Note: to make the system boot up with SMT on do this:

[tt]smtctl -m on -w boot
bosboot -a[/tt]


See also man page for smtctl


HTH,

p5wizard

 

[khalidaaa]

SMT is enabled by default for AIX5.3

For more info on SMT, please go through this link:

http://publib.boulder.ibm.com/infoc...ic=/com.ibm.aix.genprogc/doc/genprogc/smt.htm

Regards,
Khalid

 

[khalidaaa]

Following up with p5wizard suggestion. You can still see whether your system is utilizing SMT by running lparstat

# lparstat 1 3
 
System configuration: type=Shared mode=Uncapped smt=On lcpu=2 mem=2560 ent=0.50
 
%user  %sys  %wait  %idle physc %entc  lbusy   app  vcsw phint
-----  ----  -----  ----- ----- ----- ------   ---  ---- -----
  0.3   0.4    0.0   99.3  0.01   1.1    0.0     -   346     0
 43.2   6.9    0.0   49.9  0.29  58.4   12.7     -   389     0
  0.1   0.4    0.0   99.5  0.00   0.9    0.0     -   312     0

Yet other commands you will find useful (provided you know how many physical and virtual CPUs the LPAR was activated by) are mpstat and sar commands.

Have a look at this excellent doc on CPU monitoring and tuning:

http://www.ibm.com/developerworks/aix/library/au-aix5_cpu/index.html

Regards,
Khalid

 

[gatetec]

Thank you so much for the info.
It helps!