System Management Release Notes
4.6 Performance Enhancements
4.6.4 Image Activation (Integrity servers Only)
During image activation and over the life of the image, paging IO brings pages
of the image into memory. On Integrity server systems, an I-cache flush need
to be performed on these pages in case the page has code that is executed. This
resulted on the I-cache flush occurring on many pages that would never be
executed. To avoid the I-cache flush on pages that are never executed, the I-cache
is now only done on pages when an instruction is first executed on the page. This
avoids the I-cache flush on the pages that are never executed and provides an
overall system performance benefit.
4.6.5 Global Section Creation and Deletion
Performance improvements have been made to areas of the operating system that
create and delete various types of global sections. The benefits of the changes will
only be seen on large SMP systems as a reduction in MP Synch.
4.6.6 Dedicated CPU Lock Manager
The Dedicated CPU Lock Manager is a feature typically only turned used on
systems with 16 or more CPUs and very high locking rates. Improvements have
been made to the Dedicated CPU Lock Manager that results in an increase in the
rate at which locking operations can be performed.
4.6.7 Ctrl/T Alignment Faults
A Ctrl/T operation at a terminal resulted in a number of alignment faults. These
have been corrected for OpenVMS Version 8.4.
4.7 Error and Warning Messages from ACPI During Boot
V8.4
The following message may be displayed by VMS during boot on cell-based
machines (for example, rx8640 or rx7640):
ACPI Error (utmutex-0430): Mutex [1] is not acquired, cannot release [20071219]
The following message may be displayed by VMS during boot on certain systems
that have power management enabled (for example, an rx2660 with the latest
processors):
ACPI Warning (nseval-0250): Excess arguments - method [_OST] needs 3, found 7 [20080701]
These messages can be ignored. They will be fixed in a future release.
4.8 Large Device Name Support for Accounting Utility
V8.4
The accounting utility is modified to handle long device names. It can now
display device names having seven characters or more, for example, Terminal
(TNA) of unit number >9999, MBA device of unit number >999, and other large
device names such as TNA10000:, MBA1000:, and so on.
Earlier, the utility displayed arbitrary characters if a device name exceeded seven
characters. A new accounting record version (version4) is used to write new
records into the accounting.dat file and the utility is modified appropriately to
read and display these new records.
4–10 System Management Release Notes
