User`s guide
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Changes in this Release
8 RedHawk Linux Version 5.4 Release Notes
4.0. Changes in this Release
This section describes enhancements and other changes introduced in Version 5.4.
4.1 Enhancements in Version 5.4
4.1.1 RedHawk Based on RHEL 5.4
RedHawk Version 5.4 uses Red Hat Enterprise Linux 5.4 as its base with a merge of
kernel.org version 2.6.31.
4.1.2 Updated NVIDIA Support
RedHawk Version 5.4 includes the NVIDIA Linux Display Driver version 190-42. Legacy
driver support is no longer included but is available for download from the NVIDIA
website. Refer to "NVIDIA Graphics Configuration" on page 54 for details.
4.1.3 New Pagemap Utility
RedHawk 5.4 now includes a new utility called pagemap(1) that may be used to view
page mapping or swap information for all or a subset of user space translations within a
specified process’s address space. For pages that are currently resident it displays the page
frame number, NUMA node ID, number of mappings to the page and page flag
information. Refer to the pagemap(1) man page for more information.
4.1.4 Support For More Than 32 CPUs
RedHawk 5.4 is the first release of the new FBS support that allows more than 32 CPUs to
be specified for CPU affinity. Support for more than 32 CPUs includes a revised Frequency
Based Scheduler User’s Guide document, with more than 20 new services documented and
described.
4.1.5 Performance Counter Support
RedHawk 5.4 provides kernel support for the new “Performance Counter” subsystem. This
support provides a generic mechanism for counting key hardware and software events that
occur during a specified range in time. Tools and documentation for Performance Counters
are included with the RedHawk 5.4 product. See the perf(1) man page for more
information.
4.1.6 Support for KVM Virtualization
RedHawk 5.4 is the first release of the KVM virtualization solution for RedHawk. KVM
(for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86
hardware containing virtualization extensions. Using KVM, one can run multiple virtual
machines running unmodified Linux or Windows images. Each virtual machine has private
virtualized hardware: a network card, disk, graphics adapter, etc. For more information, see
the README file in /usr/share/doc/ccur/kvm and visit http://www.linux-kvm.org
for much more documentation.