Patch Name: PHCO_27578

Patch Description: s700_800 11.00 vmstat(1) cumulative patch

Creation Date: 02/09/30

Post Date:  02/11/12

Hardware Platforms - OS Releases:
	s700: 11.00
	s800: 11.00

Products: N/A

Filesets:
	OS-Core.ADMN-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP
	OS-Core.SYS-ADMIN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP

Automatic Reboot?: No

Status: General Release

Critical: No

Category Tags:
	defect_repair hardware_enablement general_release

Path Name: /hp-ux_patches/s700_800/11.X/PHCO_27578

Symptoms:
	PHCO_27578:
	vmstat(1) displays negative average cpu idle time in
	the field "id" under header "cpu".

	PHCO_21894:
	In a multi processor system, if any processor other
	than the last processor is deallocated, vmstat(1)
	shows incorrect cpu usage and average cpu usage
	information.

Defect Description:
	PHCO_27578:
	While displaying average cpu idle time, vmstat(1)
	sometimes shows negative values due to incorrect type
	of a variable leading to wrong computation results.

	Resolution:
	This problem was occurring due to a variable declared as
	float and made to hold 64 bit integer values during
	computations. To resolve this problem, the variable has
	been declared as 64 bit integer type.

	PHCO_21894:
	In a multiprocessor system of say, n processors,
	when a processor other than processor "n" is
	deallocated, vmstat(1) skips the information of
	processor "n" instead of the deallocated processor.
	While calculating the averages, vmstat(1) takes the
	deallocated processor into consideration instead of
	processor "n".

	Resolution:
	The mpctl(2) call is used in vmstat(1) to find the
	allocated processors' numbers and vmstat(1)
	is made to display and calculate information
	only for the allocated processors.

Enhancement:
	No

SR:
	8606264408 8606142736

Patch Files:
	
	OS-Core.ADMN-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,
		v=HP:
	/usr/share/man/man1.Z/vmstat.1

	OS-Core.SYS-ADMIN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/bin/vmstat

what(1) Output:
	
	OS-Core.ADMN-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,
		v=HP:
	/usr/share/man/man1.Z/vmstat.1:
		None

	OS-Core.SYS-ADMIN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/bin/vmstat:
		$Revision: 82.2.1.9 $
		PATCH_11_00: vmstat.o 02/09/30

cksum(1) Output:
	
	OS-Core.ADMN-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,
		v=HP:
	3030342973 4892 /usr/share/man/man1.Z/vmstat.1

	OS-Core.SYS-ADMIN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	829906390 28672 /usr/bin/vmstat

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHCO_21894 

Equivalent Patches: None

Patch Package Size: 60 KBytes

Installation Instructions:
	Please review all instructions and the Hewlett-Packard
	SupportLine User Guide or your Hewlett-Packard support terms
	and conditions for precautions, scope of license,
	restrictions, and, limitation of liability and warranties,
	before installing this patch.
	------------------------------------------------------------
	1. Back up your system before installing a patch.

	2. Login as root.

	3. Copy the patch to the /tmp directory.

	4. Move to the /tmp directory and unshar the patch:

		cd /tmp
		sh PHCO_27578

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHCO_27578.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHCO_27578.  If you do not wish to retain a
	copy of the original software, include the patch_save_files
	option in the swinstall command above:

		-x patch_save_files=false

	WARNING: If patch_save_files is false when a patch is installed,
		 the patch cannot be deinstalled.  Please be careful
		 when using this feature.

	For future reference, the contents of the PHCO_27578.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHCO_27578.depot

	To put this patch on a magnetic tape and install from the
	tape drive, use the command:

		dd if=/tmp/PHCO_27578.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None