topic Re: CPU number in Operating System - HP-UX

CPU number

Tonatiuh — Wed, 13 Apr 2005 16:49:18 GMT

HP-UX 11.11. How to know the number of CPUs (microprocesors) in my server?

Re: CPU number

Coolmar — Wed, 13 Apr 2005 16:52:12 GMT

'top' will give you that information - look at the top where it says CPUs, before you get to all the processes.

Also stm (xstm for GUI) will also tell you.

Sally

Re: CPU number

Biswajit Tripathy — Wed, 13 Apr 2005 16:56:41 GMT

# ioscan -nfkC processor

- Biswajit

Re: CPU number

Rick Garland — Wed, 13 Apr 2005 17:06:48 GMT

ioscan -k|grep processor|wc -l

Re: CPU number

Steve Lewis — Thu, 14 Apr 2005 03:58:13 GMT

Or in a C program:

/* returns the number of cpus installed */

#include

int main()
{

return mpctl(MPC_GETNUMSPUS,0,0);

}

Re: CPU number

Peter Godron — Thu, 14 Apr 2005 04:39:19 GMT

Hi,
if running as root:
use SAM
or
echo runningprocs/D | adb -k
/stand/vmunix /dev/mem
Processor speed:
echo itick_per_usec/D | adb -k
/stand/vmunix /dev/mem
If you have access to perl:
Processor Speed:
perl -e 'local($PSTAT, $PSTAT_PROCESSOR)=(239,10);
local($struct_pst_processor)=("L30");
local($cpu_info, $cpu_ticks);
$cpu_info = "\0" x 120;
syscall($PSTAT, $PSTAT_PROCESSOR, $cpu_info, length($cpu_info), 1, 0);
($cpu_ticks)=(unpack($struct_pst_processor, $cpu_info))[26];
print "speed=".int($cpu_ticks/10000)."\n";'
(Thanks to Nancy Rippey)

Regards

Re: CPU number

Jeff Carlin — Thu, 14 Apr 2005 08:53:43 GMT

Attached is a script that will display the number and speed of your CPU's...

i.e.:
2 CPU(s) @ 550 Mhz

The output is than awk-able for use in other scripts.

Re: CPU number

Tonatiuh — Thu, 14 Apr 2005 09:12:17 GMT

Excelent script Jeff!

Re: CPU number

Jeff Carlin — Thu, 14 Apr 2005 09:24:54 GMT

Thanks, but the adb parts were found elsewhere in this *excellent* forum. My colleague Jose found those and created the base script.

I have another one that is also helpful determining the amount of memory in use and total installed. It shows the following when run:

46 %used ( 2267 Mb free ) 4096 Mb physical

We run a mixed shop here, so it was written to run on HP, SUN & AIX. Enjoy!

Re: CPU number

Tonatiuh — Thu, 14 Apr 2005 09:32:51 GMT

Really Good Jeff. Thanks!

Re: CPU number

Anthony Lennan — Thu, 14 Apr 2005 10:23:18 GMT

Hi Tonatiuh,

Just a quick note in case you're running vpars or npars:

If you're running virtual partitions most of the above methods will only show the CPU's that are allocated for that partition. If you actually want to know the number of physical CPU's available across all vpars you can use the vparstatus command and look at the max number of cpu's.

If you're using npars and you want to know the total number of CPU's across all partitions I think the easiest way would be to use the GSP commands.

Rgds,
Anthony