How to calculate total number of cores on my servers ? Post: 303035259

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Operating Systems Solaris How to calculate total number of cores on my servers ? Post 303035259 by ron323232 on Friday 17th of May 2019 05:57:00 PM

05-17-2019

Registered User

Looks like I missed something. I want to set 1 core for one non-global zone. But even after setting up ncpu in zone configuration, I still see all core and vCPUs inside zone.

Code:

bash-3.2# kstat cpu_info|grep core_id|sort -u|wc -l
       4
bash-3.2# kstat -m cpu_info | nawk '$2=="on-line" {lcpu++} $1=="pg_id" && s[$2]++==0 {core++} END {print core?core+0:lcpu+0}'
32
bash-3.2# zonecfg -z zone1 info capped-cpu
capped-cpu:
        [ncpus: 1.00]
bash-3.2# zlogin zone1
[Connected to zone 'zone1' pts/4]
Last login: Fri May 17 14:50:23 on pts/4
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
You have new mail.
# kstat cpu_info|grep core_id|sort -u|wc -l
       4
# kstat -m cpu_info | nawk '$2=="on-line" {lcpu++} $1=="pg_id" && s[$2]++==0 {core++} END {print core?core+0:lcpu+0}'
32
#

But if I set dedicated CPU, it shows me correct CPU. Should above example not show me out as 1 , because I set ncpu 1 ?

Code:

bash-3.2# zonecfg -z zone1 info dedicated-cpu
dedicated-cpu:
        ncpus: 3
bash-3.2#
bash-3.2# zlogin zone1
[Connected to zone 'zone1' pts/4]
Last login: Fri May 17 14:54:22 on pts/4
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
You have new mail.
# kstat cpu_info|grep core_id|sort -u|wc -l
       1
# kstat -m cpu_info | nawk '$2=="on-line" {lcpu++} $1=="pg_id" && s[$2]++==0 {core++} END {print core?core+0:lcpu+0}'
3
#

I wanted to restrict core with this zone. But looks like, it is restricting vCPU. isn't ?

Last edited by ron323232; 05-17-2019 at 07:11 PM..

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LEARN ABOUT OPENSOLARIS

kstat_delete

kstat_delete(9F)					   Kernel Functions for Drivers 					  kstat_delete(9F)

NAME

       kstat_delete - remove a kstat from the system

SYNOPSIS

       #include <sys/types.h>
       #include <sys/kstat.h>

       void kstat_delete(kstat_t *ksp);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI)

PARAMETERS

       ksp     Pointer to a currently installed kstat(9S) structure.

DESCRIPTION

       kstat_delete() removes ksp from the kstat chain and frees all associated system resources.

RETURN VALUES

       None.

CONTEXT

       kstat_delete() can be called from any context.

SEE ALSO

       kstat_create(9F), kstat_install(9F), kstat_named_init(9F), kstat(9S)

       Writing Device Drivers

NOTES

       When calling kstat_delete(), the driver must not be holding that kstat's ks_lock. Otherwise, it may deadlock with a kstat reader.

SunOS 5.11							    4 Apr 1994							  kstat_delete(9F)