TECHNICAL INFORMATION DOCUMENT TITLE: PTF252 - TCP/IP patch for performance with large packets. DATE: 05JUN95 README FOR: PTF252 PRODUCT and VERSION: UnixWare 1.1 Installation Instructions: DATATYPE: datastream 1. Download the ptf252.Z and ptf252.txt files to the /tmp directroy on your machine. 2. Read the release notes contained in this file and follow the instuctions to add the package to your system. 3. Now become root, uncompress the file and add the package to your system using the following commands: $ su # uncompress /tmp/ptf252.Z # pkgadd -d /tmp/ptf252 ENGINEERING REALEASE NOTES -------------------------- PTF252 OVERVIEW --------------- Title ----- PTF252 - TCP/IP patch for performance with large packets. Version ------- 1.0 Date ---- 13MAR95 Information Type ---------------- Symptom Solution Product And Version: -------------------- UnixWare 1.1.3, UnixWare 1.1.4, UnixWare 1.1.5 Abstract: -------- Serious performance drop in large TCP/IP packets. Symptom: -------- A developer that ported a TCP/IP application from another Unix system to UnixWare noticed that large IP packets have a severe performance problem. Increasing the size of the packets resulted in decreased throughput. General Description. ------------------- These release notes acquaint you with the information for UnixWare PTF252 - "TCP/IP patch for performance with large packets." This update consists of a single 3.5 inch floppy diskette. PTF252 updates the TCP/IP driver file, /etc/conf/pack.d/tcp/Driver.o. The new driver will provide better throughput for large packets in a TCP/IP network. New Features. ------------ Software Notes and Recommendations. ---------------------------------- PTF252 will update the file /etc/conf/pack.d/tcp/Driver.o with a new version of the file. The PTF will then rebuild the kernel. The new driver will be installed after the system is rebooted. This update is for Unixware version 1.1.3, 1.1.4, or 1.1.5. Hardware Notes and Recommendations. ---------------------------------- The PTF is targeted for the i386, i486 and Pentium CPU's. Installation Instructions. ------------------------- The PTF consists of 1 3.5 inch floppy. Insert the floppy into the drive and, while logged in as root, type pkgadd -d diskette1 and follow the instructions output by pkgadd. Troubleshooting. --------------- To verify the success of PTF252, run a test that gradually increases the packet size. If the throughput decreases significantly as the size of the packet increases, then the problem still exists. This PTF was meant to remedy this problem.