Download Red Hat APPLICATION STACK 1.2 RELEASE Installation guide

Release Notes
For more information on IBS refer to the paper: Instruction-Based Sampling: A New Performance
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Analysis Technique for AMD Family 10h Processors, November 19, 2007
Squid Re-base
Squid has been re-based to the latest stable upstream version (STABLE21). This update
addresses several bugs, including:
• The squid init script always incorrectly returned an exit code of 0. This bug is now fixed,
making squid compliant now with Linux Standard Base.
• Using the refresh_stale_hit directive causes error message Clock going backwards
to appear in the squid log file.
• The squid installation process did not set up correct ownership of the /usr/local/squid
directory. With this release, the user squid is now the default owner of /usr/local/squid.
• Whenever squid attempts to use the function hash_lookup(), it could abort with signal 6.
• Using squid_unix_group could cause squid to crash.
Event Multi-Processing Model in Apache
httpd, the Apache HTTP Server package, now includes the experimental event Multi-Processing
Model (MPM). This MPM improves performance by using dedicated threads to handle keepalive
connections.
libgomp re-base
libgomp has been re-based to version 4.3.2-7.el5. The re-base improves OpenMP performance
and adds support for OpenMP version 3.0 when used with the gcc43 compiler.
iSCSI target capability
The iSCSI target capability, delivered as part of the Linux Target (tgt) framework, moves from
Technology Preview to full support in Red Hat Enterprise Linux 5.3. The linux target framework
allows a system to serve block-level SCSI storage to other systems that have a SCSI initiator. This
capability is being initially deployed as a Linux iSCSI target, serving storage over a network to any
iSCSI initiator.
To set up the iSCSI target, install the scsi-target-utils RPM and refer to the instructions in: /usr/
share/doc/scsi-target-utils-[version]/README and /usr/share/doc/scsitarget-utils-[version]/README.iscsi
4. Driver Updates
4.1. All Architectures
General Driver/Platform Updates
• The Intel High Definition Audio driver in ALSA has been updated.
• High-Definition Multimedia Interface (HDMI) audio support on AMD ATI integrated chipsets has
been updated.
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http://developer.amd.com/assets/AMD_IBS_paper_EN.pdf
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