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Date: Thu, 29 Sep 2005 10:49:16 +0530
From: Anantha Kiran Kandukuri <ananthakiran@gmail.com>
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Subject: Determining physical processors on SMT driven architectures
Reply-To: Anantha Kiran Kandukuri <ananthakiran@gmail.com>
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Hi,
Is there a programatical way of caliculating physical CPUs on IBM
SMT driven archtitural machines.

I am aware of commands of sort "lsdev -C -c processor" and "smtctl".
But is there any API to do same thing. I saw "processor_info"
strucutre in "/usr/include/sys/iplcb.h" contains information i am
looking for. Is there a way to access this.

Linux on IntelHT, stores this info in "/proc/cpuinfo" file. Similarly
AIX stores this info in "/dev/pmem" file. In KDB, "ipl" subcommand
actually parses file "/dev/pmem" to access "processor_info" strctures.
Can i simulate these KDB commands in a programatical fashion.

Atleast, are there "CPUID" sort of assembly instructions in AIX, so
that i can probe for actual number of CPUs.

Any help is appreciated.

Thanks
-Ananth
--

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Hi,<br>
&nbsp;Is there a programatical way of caliculating physical CPUs on=20
IBM<br>
SMT driven archtitural machines.<br>
<br>
&nbsp;I am aware of commands of sort=20
&quot;lsdev -C -c processor&quot; and &quot;smtctl&quot;.<br>
But is there any API to do same thing.=20
I saw &quot;processor_info&quot;<br>
strucutre in &quot;/usr/include/sys/iplcb.h&quot; contains=20
information i am<br>
looking for. Is there a way to access this.<br>
<br>
&nbsp;Linux on=20
IntelHT, stores this info in &quot;/proc/cpuinfo&quot; file. Similarly<br>
AIX stores this=20
info in &quot;/dev/pmem&quot; file. In KDB, &quot;ipl&quot; subcommand<br>
actually parses file=20
&quot;/dev/pmem&quot; to access &quot;processor_info&quot; strctures.<br>
Can i simulate these KDB=20
commands in a programatical fashion.<br>
<br>
&nbsp;Atleast, are there &quot;CPUID&quot; sort of=20
assembly instructions in AIX, so<br>
that i can probe for actual number of=20
CPUs.<br>
<br>
&nbsp;Any help is appreciated.<br>
<br>
Thanks<br>
-Ananth<br>
--<br>

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