Patch Name: PHKL_30035 Patch Description: s700_800 11.11 Psets Enablement; FSS iCOD; callback; FSS Creation Date: 03/12/09 Post Date: 03/12/18 Repost: 04/03/11 The Other Dependencies section of the patch documentation was modified to clarify that PHKL_30037 must also be installed on systems with the HP-UX Processor Sets software. Hardware Platforms - OS Releases: s700: 11.11 s800: 11.11 Products: N/A Filesets: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP Automatic Reboot?: Yes Status: General Release Critical: No Category Tags: defect_repair enhancement general_release Path Name: /hp-ux_patches/s700_800/11.X/PHKL_30035 Symptoms: PHKL_30035: ( SR:8606314571 CR:JAGae77335 ) Certain workloads cannot achieve their entitlements with the Fair Share Scheduler (FSS) when capping is enabled. This results in a performance degradation for some workloads. PHKL_29705: ( SR:8606274083 CR:JAGae38161 ) When running the IO based jobs with the Fair Share Scheduler (FSS) enabled via Process Resource Manager (PRM) or Workload Manager (WLM), the observation of performance degradation is 10-20%. PHKL_27531: ( SR:8606277297 CR:JAGae41368 ) The design for callbacks on clock interrupts only allows for a single client to register a callback at a time. Registering multiple callbacks simultaneously will cause the callbacks to interfere with each other. PHKL_26232: ( SR:8606235626 CR:JAGae04770 ) When running Process Resource Manager(PRM) on Instant Capacity On Demand (iCOD) enabled system, PRM groups may exceed their CPU entitlement when the PRM capping feature is on. PHKL_24573: ( SR:8606200799 CR:JAGad69975 ) This patch is a member of a set of patches needed to enable the HP-UX Processor Sets product (PROCSETS). When PROCSETS product is installed, it will install the full set of required patches for that product, including this patch. If the HP-UX Processor Sets product is not installed, this change will have no impact on your system. Defect Description: PHKL_30035: ( SR:8606314571 CR:JAGae77335 ) Existing algorithms of the fair-share scheduler (FSS) make some decisions which are inappropriate for some workloads when the capping feature of FSS is enabled. This causes processors to remain idle even when some FSS groups have not attained their entitlements. Resolution: Invokes the updated version of FSS per clock interrupt function. The FSS balancer and thread selection algorithms have been modified where capping is enabled so that the processors do not inappropriately idle. This improves the ability of FSS groups to attain their entitlements. PHKL_29705: ( SR:8606274083 CR:JAGae38161 ) On a large PRM group count systems, HP-UX walks the run queue once per group. Also, per-group tick accounting is not very precise. Resolution: In clock interrupt path, update per-group tick accounting to be more accurate for IO. PHKL_27531: ( SR:8606277297 CR:JAGae41368 ) The system doesn't support simultaneous multiple callbacks. Resolution: This patch implements a new function which can be used to schedule a callback per processor on each clock tick. This new function can be called by multiple system components thereby eliminating the potential for interference. PHKL_26232: ( SR:8606235626 CR:JAGae04770 ) The scheduler used by PRM charges CPU usage based on shares allocated to each processor, to appropriate PRM groups. However, on iCOD systems, where one or more processors are deallocated, CPU time on deallocated processors was charged erroneously to PRM groups. This erroneous charge gave the appearance of PRM groups achieving usage beyond entitlement, when PRM capping feature is on. Resolution: CPU time on deallocated processors will not be charged to PRM groups. PHKL_24573: ( SR:8606200799 CR:JAGad69975 ) This patch contains minor enhancements required to support the HP-UX Processor Sets product. Resolution: Enhancements added to enable the clock interrupt path to handle processor sets impact when Processor Sets is enabled. Enhancement: No (superseded patches contained enhancements) PHKL_27531: Enhancements were delivered in a patch this one has superseded. Please review the Defect Description text for more information. SR: 8606200799 8606235626 8606274083 8606277297 8606314571 Patch Files: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP: /usr/conf/lib/libpm.a(pm_clockint.o) OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP: /usr/conf/lib/libpm.a(pm_clockint.o) what(1) Output: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP: /usr/conf/lib/libpm.a(pm_clockint.o): pm_clockint.c $Date: 2003/12/05 14:09:27 $Revision: r11.11/5 PATCH_11.11 (PHKL_30035) OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP: /usr/conf/lib/libpm.a(pm_clockint.o): pm_clockint.c $Date: 2003/12/05 14:09:27 $Revision: r11.11/5 PATCH_11.11 (PHKL_30035) cksum(1) Output: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP: 2383374749 5692 /usr/conf/lib/libpm.a(pm_clockint.o) OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP: 2653038195 12968 /usr/conf/lib/libpm.a(pm_clockint.o) Patch Conflicts: None Patch Dependencies: s700: 11.11: PHKL_30032 PHKL_30033 PHKL_30034 PHKL_30036 s800: 11.11: PHKL_30032 PHKL_30033 PHKL_30034 PHKL_30036 Hardware Dependencies: None Other Dependencies: PHKL_30035: On systems with the HP-UX Processor Sets product (PROCSETS) version A.01.00.00.06 installed, PHKL_30037 must be installed with this patch to avoid a system panic. Supersedes: PHKL_29705 PHKL_27531 PHKL_26232 PHKL_24573 Equivalent Patches: None Patch Package Size: 40 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 PHKL_30035 5. Run swinstall to install the patch: swinstall -x autoreboot=true -x patch_match_target=true \ -s /tmp/PHKL_30035.depot By default swinstall will archive the original software in /var/adm/sw/save/PHKL_30035. 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 PHKL_30035.text file is available in the product readme: swlist -l product -a readme -d @ /tmp/PHKL_30035.depot To put this patch on a magnetic tape and install from the tape drive, use the command: dd if=/tmp/PHKL_30035.depot of=/dev/rmt/0m bs=2k Special Installation Instructions: None