Patch Name:  PHSS_7816

Patch Description: s700_800 10.20 sched.models for PA-8000/7200 based machines

Creation Date: 96/06/21

Post Date:  96/08/27

Hardware Platforms - OS Releases:
        s700: 10.20
        s800: 10.20

Products:
        Auxiliary-Opt B.10.20.00

Filesets:
        Auxiliary-Opt.LANG-STARTUP,B.10.20.00

Automatic Reboot?: No

Status: General Superseded

Critical: No

Path Name:  /hp-ux_patches/s700_800/10.X/PHSS_7816

Symptoms:
        PHSS_7816:
        Code compiled without the +DA/+DS options on some of the
        newer PA-RISC machines may be optimized for an older
        architecture, resulting in degraded performance of
        optimized code.  This occurs on all series 700 PA-8000
        workstations and some series 800 PA-8000 servers.
        The affected models are:
        780, 781, 802, 804, 893, C160, C180, C180-XP, J280, K250,
        K260-EG, K450, K460-EG, K460-XP, and T540.
        This can also occur for some of the newer PA-7200
        systems.  However, the performance degradations should
        be much smaller.  The affected models are:
        777, C110, D250, D350, K220, and K420.

Defect Description:
        PHSS_7816:
        The sched.models file was not updated to include entries
        for the newer systems.  Hence, when a program is compiled
        without the +DA/+DS options on one of these newer systems,
        the optimizer is unable to determine the architecture of
        the system and defaults to the PA7100 architecture
        (+DA1.1 +DS1.1b).  This can greatly impact the performance
        of PA8000 systems, for the compiler employs several
        optimizations that are unique to the PA8000.

SR:
        4701329003

Patch Files:
        /opt/langtools/lib/sched.models

what(1) Output:
        /opt/langtools/lib/sched.models:
                None

cksum(1) Output:
        1956138140 2741 /opt/langtools/lib/sched.models

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  None

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 PHSS_7816

        5a. For a standalone system, run swinstall to install the
            patch:

                swinstall -x autoreboot=true -x match_target=true \
                        -s /tmp/PHSS_7816.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/PHSS_7816.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/PHSS_7816.  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 PHSS_7816.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/PHSS_7816.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:  None