Patch Name: PHKL_12039 Patch Description: s700 10.10 MP file locking performance, NOAGE patch Creation Date: 97/09/19 Post Date: 97/10/10 Hardware Platforms - OS Releases: s700: 10.10 Products: N/A Filesets: OS-Core.CORE-KRN Automatic Reboot?: Yes Status: General Superseded Critical: No (superseded patches were critical) PHKL_6677: HANG Path Name: /hp-ux_patches/s700/10.X/PHKL_12039 Symptoms: PHKL_12039: Resource-intensive processes (such as an Informix oninit) either perform poorly over time (as timeshare) or monopolize the system (as realtime). Also, MP systems show processes frequently being moved from one CPU to another. PHKL_9339: On MP systems with several processors, applications which do file locking frequently can perform poorly. The symptoms are a high switch rate (switch rate > syscall rate) and heavy system activity (%sys > 90%). PHKL_6677: On Multi-processor machines, during a reboot it is possible for the system to hang. It can only occur on a multi-processor system and only when you reboot, not when you power-up. Defect Description: PHKL_12039: The scheduling policies available prior to this patch did not have a provision for a fixed-priority timeshare (non-realtime) process, one which could use many system resources without being degraded to a very low priority. This patch provides this "no aging" timeshare facility for applications which need it. This facility uses the same interface which is in 11.00, through the POSIX interface routines: applications which need to use this facility should use the sched_setscheduler(2) system call with a new policy of 8 (to be defined in 11.00 as SCHED_NOAGE). Idle processors were stealing processes from other run queues, even when those processes were running frequently already. PHKL_9339: The file locking code is protected by a single semaphore (the filesys sema). As the semaphore becomes heavily utilized, starvation prevention code activates which leads to excessive spinning and switching. PHKL_6677: The defect is caused by a variable in the kernel that needed to be re-initialized during a reboot that otherwise caused a hang. SR: 4701312595 4701341644 5003360446 5003380113 Patch Files: /usr/conf/lib/libhp-ux.a(pm_policy.o) /usr/conf/lib/libhp-ux.a(pm_rtsched.o) /usr/conf/lib/libhp-ux.a(pm_swtch.o) /usr/conf/lib/libhp-ux.a(sem_alpha.o) what(1) Output: /usr/conf/lib/libhp-ux.a(pm_policy.o): pm_policy.c $Date: 97/09/19 18:28:50 $ $Revision: 1.3.89.14 $ PATCH_10.10 (PHKL_12039) /usr/conf/lib/libhp-ux.a(pm_rtsched.o): pm_rtsched.c $Date: 97/09/19 18:27:51 $ $Revision: 1 .3.89.10 $ PATCH_10.10 (PHKL_12039) /usr/conf/lib/libhp-ux.a(pm_swtch.o): pm_swtch.c $Date: 97/09/19 18:30:18 $ $Revision: 1.3.89.29 $ PATCH_10.10 (PHKL_12039) /usr/conf/lib/libhp-ux.a(sem_alpha.o): sem_alpha.c $Date: 96/11/25 17:27:48 $ $Revision: 1.7.89.13 $ PATCH_10.10 (PHKL_9339) cksum(1) Output: 4228624439 15068 /usr/conf/lib/libhp-ux.a(pm_policy.o) 800870016 9364 /usr/conf/lib/libhp-ux.a(pm_rtsched.o) 2078798553 21212 /usr/conf/lib/libhp-ux.a(pm_swtch.o) 1290464529 9500 /usr/conf/lib/libhp-ux.a(sem_alpha.o) Patch Conflicts: None Patch Dependencies: None Hardware Dependencies: None Other Dependencies: None Supersedes: PHKL_6677 PHKL_9339 Equivalent Patches: PHKL_11996: s700: 10.01 PHKL_11997: s800: 10.01 PHKL_12041: s800: 10.10 PHKL_12042: s700: 10.20 PHKL_12043: s800: 10.20 Patch Package Size: 120 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_12039 5a. For a standalone system, run swinstall to install the patch: swinstall -x autoreboot=true -x match_target=true \ -s /tmp/PHKL_12039.depot 5b. For a homogeneous NFS Diskless cluster run swcluster on the server to install the patch on the server and the clients: swcluster -i -b This will invoke swcluster in the interactive mode and force all clients to be shut down. WARNING: All cluster clients must be shut down prior to the patch installation. Installing the patch while the clients are booted is unsupported and can lead to serious problems. The swcluster command will invoke an swinstall session in which you must specify: alternate root path - default is /export/shared_root/OS_700 source depot path - /tmp/PHKL_12039.depot To complete the installation, select the patch by choosing "Actions -> Match What Target Has" and then "Actions -> Install" from the Menubar. 5c. For a heterogeneous NFS Diskless cluster: - run swinstall on the server as in step 5a to install the patch on the cluster server. - run swcluster on the server as in step 5b to install the patch on the cluster clients. By default swinstall will archive the original software in /var/adm/sw/patch/PHKL_12039. If you do not wish to retain a copy of the original software, you can create an empty file named /var/adm/sw/patch/PATCH_NOSAVE. Warning: If this file exists when a patch is installed, the patch cannot be deinstalled. Please be careful when using this feature. It is recommended that you move the PHKL_12039.text file to /var/adm/sw/patch for future reference. To put this patch on a magnetic tape and install from the tape drive, use the command: dd if=/tmp/PHKL_12039.depot of=/dev/rmt/0m bs=2k Special Installation Instructions: None