LPAR CPU capacity planning Post: 302804371

Sponsored Content

Operating Systems AIX LPAR CPU capacity planning Post 302804371 by MichaelFelt on Wednesday 8th of May 2013 12:54:35 PM

05-08-2013

Registered User

lbusy gives you the relative number of "logical" cpus busy. Since you are smt4 your have 96/4 virtual processors - 24 virtual (i.e. maximum physical processors at any moment).

Since your entitlement is 16 - the PHYP has reserved (declared as Home) two sockets of 8 cores each. The 8 extra virtual processors will run, ideally, on these home processors.

16 entitlement == 160 msec processing power every 10 msec guaranteed.

phsyc * 10 = # msec actually used (not processors!)
lbusy * 96 = average number of threads busy; if this number is nearly equal to physc, then you are running, mainly, single-threaded and you could easily reduce the number of VP assigned (to 'force' more utilization from a single processor (i.e., lbusy goes up faster than physc).

Hope this helps (I have to run to dinner Smilie

)

MichaelFelt

View Public Profile for MichaelFelt

Find all posts by MichaelFelt

7 More Discussions You Might Find Interesting

1. Solaris

Planning for DR, I have to collect information

Dear All, We are going for Disaster Recovery project, the vendor asked for more details about how much is the daily data changes only. using sar / iostat can any one help me to collect this ?! Note: only I need the changed data size not the daily increasing data. this is to know how much...

2. What is on Your Mind?

Planning to be certified , your advice?

Hi, I got 2 courses Intermediate and advanced Solaris 10 Administration before 1 month. I was studying the material of the 1st course I will finish it soon. I want to get the Exam. What is your advice? Which is the best Exam Quastion ( Testking or ,,,,,,,, Etc) .... Regards

3. AIX

capacity planning on aix

Hi All, What do you usually use for capacity planning on AIX? Any idea will do? Thanks in advance, itik

4. Solaris

tools for capacity planning

Hi All, What do you usually use for capacity planning tool on solaris 8 or later? Thanks in advance.

5. AIX

LPAR freezes after switching of storage (lpar is mirrored)

Hi all, I have the following configuration 2 ds3524 storage disk systems located over 2 locations 2 P720 server located over 2 locations DS3524 are connected to san switch. Each vio server has 1 fc adapter attached to a san switch. per p720 server 2 virtual io servers. Vio 1 has 1 lun...

6. AIX

How to differentiate between a standalone LPAR and a VIOC (which again is a lpar)?

There can be configurations in IBM Server wherein a standalone partition is created on some supported IBM Server Or A VIOS - VIOC LPARs created. Now in both cases they are lpars. But if I want to differentiate b/w a standalone LPAR vs an VIOC LPAR how can I do..? On a...

7. AIX

FS capacity

can anyone tell me how to reduce Fs capacity by using echo zero.

LEARN ABOUT NETBSD

cpuset_destroy

CPUSET(3)						   BSD Library Functions Manual 						 CPUSET(3)

NAME

     cpuset_create, cpuset_destroy, cpuset_zero, cpuset_set, cpuset_clr, cpuset_isset, cpuset_size -- dynamic CPU sets

SYNOPSIS

     #include <sched.h>

     cpuset_t *
     cpuset_create(void);

     void
     cpuset_destroy(cpuset_t *set);

     void
     cpuset_zero(cpuset_t *set);

     int
     cpuset_set(cpuid_t cpu, cpuset_t *set);

     int
     cpuset_clr(cpuid_t cpu, cpuset_t *set);

     int
     cpuset_isset(cpuid_t cpu, const cpuset_t *set);

     size_t
     cpuset_size(const cpuset_t *set);

DESCRIPTION

     This section describes the functions used to create, set, use and destroy the dynamic CPU sets.

     This API can be used with the POSIX threads, see pthread(3) and affinity(3).

     The ID of the primary CPU in the system is 0.

FUNCTIONS

     cpuset_create()
	      Allocates and initializes a clean CPU-set.  Returns the pointer to the CPU-set, or NULL on failure.

     cpuset_destroy(set)
	      Destroy the CPU-set specified by set.

     cpuset_zero(set)
	      Makes the CPU-set specified by set clean, that is, memory is initialized to zero bytes, and none of the CPUs set.

     cpuset_set(cpu, set)
	      Sets the CPU specified by cpu in set.  Returns zero on success, and -1 if cpu is invalid.

     cpuset_clr(cpu, set)
	      Clears the CPU specified by cpu in the CPU-set set.  Returns zero on success, and -1 if cpu is invalid.

     cpuset_isset(cpu, set)
	      Checks if CPU specified by cpu is set in the CPU-set set.  Returns the positive number if set, zero if not set, and -1 if cpu is
	      invalid.

     cpuset_size(set)
	      Returns the size in bytes of CPU-set specified by set.

SEE ALSO

     affinity(3), pset(3), sched(3), schedctl(8), kcpuset(9)

HISTORY

     The dynamic CPU sets appeared in NetBSD 5.0.

BSD
								 November 2, 2011							       BSD