TECHNICAL INFORMATION DOCUMENT

TITLE:              PTF605 - Pentium(r) Performance patch.
DOCUMENT ID:        TID300037
DOCUMENT REVISION:  C
DATE:               25JAN95
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         PTF605

PRODUCT and VERSION:
UnixWare 1.1

ABSTRACT:

The ptf605 contains Pentium(r) Performance Improvement Patch. 
PTF605 provides improved performance for large applications on 
large (at least 32 MB memory) systems.  PTF605 can only be installed 
on UnixWare 1.1, OracleWare 1.0, or UnixWare 1.1.1. PTF605 can not be 
installed on UnixWare 1.1.2. PTF605 is delta'ed to UnixWare 1.1.3.  
PTF605 contains updated kernel modules, includes the async I/O patch 
(previously distributed as ptf101), and includes replacement functions 
for the C-library.

SYMPTOM

Improved performance is needed for large applications on large 
(at least 32 MB memory) systems.

SOLUTION

Apply the ptf605 file.

Installation Instructions:

DATATYPE: datastream

1.  Download the ptf605.Z and ptf605.txt files to the /tmp directory 
    on your machine.

2.  Read the release notes contained in this file.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

     $ su
     # uncompress /tmp/ptf605.Z
     # pkgadd -d /tmp/ptf605 ptf605

Solution Specifics:

1. General Description

These release notes acquaint you with the contents of UnixWare PTF605 -
Pentium Performance Improvement Patch.  PTF605 provides improved performance
for large applications on large (at least 32 Meg memory) systems.

2. Software Notes

PTF605 requires either UnixWare 1.1 or OracleWare for UnixWare 1.0 to be
installed on the system. PTF605 contains updated kernel modules, includes 
the async I/O patch (previously distributed as ptf101), and includes 
replacement functions for the C-library.

NOTE: This patch modifies same files as ptf101, ptf108, ptf121, ptf139,
ptf158, ptf610, update 1.1.1 and update 1.1.2

PTF605 is designed to work with Pentium(r) based systems with large 
amounts of memory.  On these configurations, it has shown substantial 
improvements over the standard 1.1 operating system.  We do not recommend 
installing this patch on systems that have less than 32 Megabyte of 
system memory.

3. Installation Instructions

PTF605 replaces several kernel modules and a C-library function. If 
you are planning on using either the C Compilation System or the 
kernel debugger, they should be installed prior to installing PTF605.  
Should you need to install the CCS or KDB after you have installed 
PTF605, deinstall the PTF via "pkgrm", install the additional software, 
and reinstall the PTF.

It would be best to install applications after the PTF has been installed 
on the system.

To install PTF605, enter the following:

     # pkgadd -d diskette1

After the pkgadd has successfully completed, reboot your system.

4. Tuning Instructions:

Most of the PTF features operate transparently to you and won't require
additional tuning.  The PTF includes two features that will require some
intervention:

  1) high performance gettimeofday():
  To take advantage of the improved timing services, relink or reinstall your
applications that use gettimeofday().

  2) 4 Meg page frame support:
  A new tunable: PSE_PHYSMEM is available.  This tunable controls the number
of bytes of system memory dedicated to 4 Meg pages.  This memory is used by
the shared memory driver and provides higher performance under heavy database
loads.

  When tuning PSE_PHYSMEM, make sure that it is set to a multiple of 4
Megabytes (4194304.)  Also, be sure to reserve only as much memory as is
required for the application's shared memory segment.