This site provides you access to Concurrent Real-Time software products and updates to those products that execute on the following platforms:
- RedHawk Linux
- CentOS
- Red Hat Enterprise Linux
- Ubuntu
You can download NUU, Concurrent Real-Time's Network Update and Installation utility, browse product repositories to manually download software packages, or create customized Update CD images for immediate download.
Services:
February 12th, 2021 - CentOS 8.0 End of Life Update
Red Hat recently announced that support for CentOS 8 will end in December 2021. Concurrent Real-Time is actively monitoring the CentOS distribution status. Our plan is to select a new RHEL clone to replace the current RedHawk Linux CentOS user environment. We are currently investigating AlmaLinux and Rocky Linux as possible replacements.
We expect a smooth transition for our customers using CentOS-based RedHawk. Concurrent will continue to offer the RHEL and Ubuntu user environments for RedHawk installs on iHawk systems, and Concurrent will continue to support all released versions of CentOS-based RedHawk.
Messages:
Most recent message on April 15th, 2021
April 15, 2021 - RedHawk Linux 8.2.1 was Released (x86_64)
RedHawk Linux 8.2.1 is now available for x86_64 systems running CentOS/RHEL 8.2 and Ubuntu 20.04
Changes include the following:
April 13, 2021 - RedHawk Linux 7.3.14 was Released (x86_64)
RedHawk Linux 7.3.14 is now available for x86_64 systems running CentOS/RHEL 7.3 and Ubuntu 16.04
Changes include the following:
February 12, 2021 - RedHawk KVM-RT 1.2 was Released (x86_64)
RedHawk KVM-RT 1.2 is now available for x86_64 systems running RedHawk 7.0 - 8.2 on CentOS and RedHawk 7.3 - 8.2 on Ubuntu.
Please see the RedHawk KVM-RT Release Notes v 1.2 for more information.
December 21, 2020 - RedHawk Linux 7.3.13 was Released (x86_64)
RedHawk Linux 7.3.13 is now available for x86_64 systems running CentOS/RHEL 7.3 and Ubuntu 16.04
Changes include the following:
December 11, 2020 - RedHawk 8.2 Released (x86_64)
RedHawk 8.2 is a full production release of RedHawk Linux.
Key features include:
- Based on kernel.org 5.4.66
- Support of CentOS and RHEL 8.2
- Support of Ubuntu 20.04
- Support of x86_64 programs
- Support of i386 programs executing on an x86_64 system
- See the Release Notes for more information
December 11, 2020 - NightStar 5.0 Released (x86_64 & aarch64)
NightStar 5.0 is a full production release supporting x86_64, aarch64, and i386 on x86_64. Its key focus is the support of RedHawk 8.2 running on CentOS 8.2, RHEL 8.2, and Ubuntu 20.04.
NightStar 5.0 supports RedHawk 7.5 and greater and all distributions that run those RedHawk versions. You should consult the Release Notes before installation.
NightStar version 4.8 will be maintained for prior RedHawk versions.
November 5, 2020 - Concurrent Real-Time's Ubuntu software repository key expired
This only affects software repositories for Concurrent's Ubuntu-based products.
A new key has been created. You will need to update your apt key ring with the extended key.
October 14, 2020 - RedHawk 7.5.3 Gold for Jetson NX Xavier was Released (arm64)
RedHawk 7.5.3 is now available for x86_64 systems running Ubuntu 16.04, 18.04.
Changes include the following:
- Import JetPack 4.4 L4T version R32.4.3 for Jetson Xavier NX.
- Reintroduce functionality to avoid cross-processor interrupts on ltmr-shielded CPUs during nvmap cache maintenance.
- Update kernel-parameters for rt_safe_mask for Xavier NX.
September 28, 2020 - RedHawk 7.5.6 was Released (x86_64)
RedHawk 7.5.6 is now available for x86_64 systems running CentOS 7, RHEL 7, and Ubuntu 16.04.
Changes include the following:
- Imported kernel.org 4.9.234-rt152.
- Enabled CONFIG_CIFS_SMB2 in all RedHawk kernels.
- Added 'plx_off' boot parameter.
- Added 'new_redhawk_syscalls' boot parameter.
- Added new 'workqueue.shield.nomigration' boot parameter.
- Added support for shield(1) to atomically add to or subtract cpus from the list of shielded cpus.
- Reduced PDL issues in selinux.
September 17, 2020 - RedHawk 7.3.12 was Released (x86_64)
RedHawk 7.3.12 is now available for x86_64 systems running CentOS 7, RHEL 7, and Ubuntu 16.04.
Changes include the following:
- CentOS/RHEL
- Import 4.4.231-rt202.
- Import 4.4.235-rt206.
- Backport atomic updating of shielding cpumask from shield(1).
- Backport partial support for the new RedHawk syscall ID range.
- Ubuntu
- Adjust shield command to make incremental changes atomically where the kernel supports it.
August 18, 2020 - RedHawk 8.0.3 was Released (x86_64)
RedHawk 8.0.3 is now available for x86_64 systems running CentOS 8, RHEL 8, and Ubuntu 18.04.
Changes include the following:
- Imported kernel.org 4.14.177-rt82
- Updated Aquantia NIC driver to version 2.0.15.0
- Fixed device recognition bug in the COMMMETCH 4224 and 4228 serial cards
- Added support for building signed kernels with pre-generated signing keys
- Added support to preserve existing signing keys
- Added force-default-boot-kernel support to the kernel rpm/ubuntu packaging
- Added module parameters for intel-iommu driver to prevent iommu remapping of devices behind PLX bridges or by device id
- Added intel_iommu.blacklist_ids= kernel command line option and support
- Eliminated syscall latencies due to SELinux hash regeneration (latency due to the first creation of a hash entry remains)
- Added the workqueue.shield.nomigrate option which allows cpu-unbounded work to be queued up and run on a shielded cpu, when that work is being queued up from such a cpu
August 4, 2020 - RedHawk 7.5.2 Gold for Jetson TX1 was Released (arm64)
RedHawk 7.5.2 Gold for the Jetson TX1 is now available for host systems running Ubuntu 16.04 or 18.04.
Changes include the following:
- Import JetPack 4.3 L4T version R32.3.1 for all jetson boards
- Added support for TX2, TX2i and TX1
- Fix ccur-config scripts to copy Module.symvers from correct location
- Added support for new RCIM cyclone card
June 26, 2020 - RedHawk 7.5.2 Gold for Jetson Nano was Released (arm64)
RedHawk 7.5.2 Gold for Jetson Nano is now available for arm64 systems running Ubuntu 16.04 or 18.04.
Changes include the following:
- Imported JetPack 4.3 L4T version R32.3.1 for all Jetson boards
- Fixed ccur-config scripts to copy Module.symvers from correct location
- Added support for new RCIM cyclone card
June 23, 2020 - RedHawk Architect 8.0 was Released (x86_64)
RedHawk Architect 8.0 is now available for x86_64 systems running CentOS/RHEL 8.0.
Changes include the following:
- Added support for NVMe drives on target systems
- Added better support for virtual machines, such as allowing the use of virtio disk devices and configuration of UEFI secure-boot VMs
- Added a new feature to export virtual machine images to RedHawk KVM-RT
- Updated installation DVDs to use a hybrid ISO that boots on UEFI systems
- Provide a much-improved target system image file manager GUI
June 16, 2020 - RedHawk 6.5.11 was Released (i386, x86_64)
RedHawk 6.5.11 is now available for i386 and x86_64 systems running CentOS/RHEL 6.5
Changes include the following:
- Adjust the kernel's masterclock PLL to be able to handle adjtimex(2) freq adjustments of up to 100,000 ppm
- Backport support for the performance enhanced fast-path version of fbscycle(3)
- Reduce measured max hit of selinux on syscall execution times from several milliseconds to about 170 usecs
- Fix RCIM driver bug where an intermediate close could be treated as a final close
- Add RCIM driver support for the new Cyclone-based RCIM III card
- Get kdump working again by slightly tweeking the supporting kernel's .config options
June 2, 2020 - RedHawk 7.3.11 was Released (x86_64)
RedHawk 7.3.11 is now available for x86_64 systems running CentOS/RHEL 7.3 and Ubuntu 16.04
Changes include the following:
- Imported kernel.org 4.4.215-rt192
- Imported kernel.org 4.4.215-rt196
May 26, 2020 - RedHawk 7.5.5 was Released (x86_64)
RedHawk 7.5.5 is now available for x86_64 systems running CentOS 7.5, RHEL 7.5, and Ubuntu 16.04 & 18.04
Changes include the following:
- Imported kernel.org 4.9.217-rt140
- Imported kernel.org 4.9.220-rt143
- Added an intel-iommu blacklist boot parameter. This enables devices behind non-transparent bridges to be able to perform DMA transactions when IOMMU is enabled.
May 20, 2020 - RedHawk 7.2.7 was Released (x86_64)
RedHawk 7.2.7 is now available for x86_64 systems running CentOS 7.2 and RHEL 7.2
Changes include the following:
- Modified masterclock(5) to be able to handle frequency adjustments of up to 100,000 ppm.
- Backported support for the performance enhanced fast-path version of fbscycle(3)
- Adjusted local timer shielding to behave properly when CONFIG_HOTPLUG=y. This only applies to custom kernels where the user has changed the value from =n to =y.
- Improved process shielding as it was not entirely protected from process exit.
- Modified the RCIM driver to support the new Cyclone-based RCIM-III cards.
May 19, 2020 - RedHawk 7.5.2 Gold (arm64)
RedHawk 7.5.2 Gold is now available for NVIDIA Jetson TX2/TX2i systems.
See the RedHawk 7.5.2 TX2 Release Notes for more information.
May 5, 2020 - RedHawk 7.5.4 was Released (x86_64)
RedHawk 7.5.4 is now available for x86_64 systems running CentOS 7.5, RHEL 7.5, and Ubuntu 16.04 & 18.04
Changes include the following:
- Imported kernel.org 4.9.201-rt134
- Imported kernel.org 4.9.201-rt138
- Imported kernel.org 4.9.201-rt139
- Support the new Cyclone-based RCIM III card
- Support a new syscall ID range for RedHawk-specific system calls
Apr 22, 2020 - RedHawk 8.0.2 was Released (x86_64)
RedHawk 8.0.2 is now available for x86_64 systems running CentOS 8, RHEL 8, and Ubuntu 18.04.
Changes include the following:
- Imported kernel.org 4.14.155-rt70
- Back-ported 4.15-rc1 i40e Ethernet driver
- Added boot parameter that controls msi-x auto CPU assignment
- Added VFIO parameter to specify a device via bus/slot/function
- Added shielding operations to cpucntl(2) so cpus can be atomically added or subtracted. Used by the new shield(1) command.
- Updated the NVIDIA driver to v440.31
- Imported kernel.org 4.14.170-rt74
- Added RCIM-IIIb support to the RCIM driver
- Added new tracepoints corresponding to KVM-RT activity
- Fixed NULL pointer panic that could occur on IRQ migration between cpus
- Imported kernel.org 4.14.172-rt78
March 9, 2020 - RedHawk 7.3.10 was Released (x86_64)
RedHawk 7.3.10 is now available for x86_64 systems running CentOS 7, RHEL 7, and Ubuntu 16.04.
This update to RedHawk 7.3 includes changes from kernel.org 4.4.206-rt191
It also provides support for the RCIM IIIb board from Concurrent Real-Time.
February 20, 2020 - Initial Release of the NightTrace Logging API for Python
Python 2 bindings to the NightTrace Logging API are now available under the NightStar 4.8 release.
You can obtain the ccur-ntrace-python package from the NightStar 4.8 repository or Browse for it directly.
After installation, see the examples in /usr/lib/NightTrace/python/python2/examples.
February 3, 2020 - RedHawk KVM-RT 1.1 was Released (x86_64)
RedHawk KVM-RT is now available for x86_64 systems running RedHawk 7.5 or 8.0.
Please see the RedHawk KVM-RT Release Notes v 1.1 for more information.
Dec 10, 2019 - RedHawk 7.3.9 was Released (x86_64)
RedHawk 7.3.9 is now available for x86_64 systems running CentOS 7, RHEL 7, and Ubuntu 16.04.
This update to RedHawk 7.3 includes changes from kernel.org 4.4.201-rt189
Dec 9, 2019 - RedHawk 8.0.1 was Released (x86_64)
RedHawk 8.0.1 is now available for x86_64 systems running CentOS 8, RHEL 8, and Ubuntu 18.04.
This update to RedHawk 8.0 includes changes from kernel.org 4.14.146-rt67
Dec 6, 2019 - RedHawk 8.0 OFED for Infiniband was Released (x86_64)
Released the latest Open Fabrics Enterprise Distribution (OFED) for use with Infiniband.
Nov 4, 2019 - RedHawk 8.0 was Released (x86_64, arm64)
RedHawk 8.0 is now available for x86_64 and selected arm64 system running CentOS 8, RHEL 8, and Ubuntu 18.04.
See the RedHawk 8.0 Release Notes for more information.
Nov 4, 2019 - NightStar 4.8 was Released (i386, x86_64, arm64)
NightStar 4.8 is now available. It adds support for systems running (RedHawk 8.0) CentOS 8, RHEL 8, and Ubuntu 18.04.
See the NightStar 4.8 Installation Guide for more information.
March 12, 2019 - RedHawk 7.5.2 was Released (x86_64)
RedHawk 7.5.2 is now available for x86_64 systems running CentOS, RHEL, and Ubuntu distributions.
ccur-kernel-7.5.2 changelog
- Backported the 4.14-linux megaraid driver to 4.9-RedHawk.
- Fixed a line ordering bug in /proc/driver/rcim*/pps-stats.
- Fixed a performance issue in the NVIDIA driver 390.48 in buffer preallocation.
- Fixed various compile-time warnings when building a custom kernel from scratch (in stmmac_pci.c, mm/filemap.c).
March 11, 2019 - Architect 7.5.1 was Released (x86_64)
Architect 7.5.1 is now available for x86_64 systems running CentOS or RHEL.
- Added support for the optional Advanced Security Extension for SELinux and SCAP configuration.
- Added a search feature to find packages by name or description.
- Fixed various bugs and made GUI improvements.
See the Architect 7.5.1 Release Notes for more information.
March 11, 2019 - NVIDIA 390.48 RedHawk 6.5 Driver w/ CUDA 9.1 was Released (x86_64)
- Provides a RedHawk-optimized NVIDIA version 390.48 driver for RedHawk 6.5.x
- Includes CUDA 9.1
- The software was provided solely for use with RedHawk 6.5.x
- Available on request for customers with active maintenance contracts -- contact your Concurrent Real-Time salesman or send email to support@concurrent-rt.com.
February 25, 2019 - RedHawk 7.5 for NVIDIA DRIVE PX2 Auto Chauffer was Released (arm64)
RedHawk 7.5 (7.5.2) is now available on the NVIDIA DRIVE PX 2 AutoChauffer.
View the RedHawk 7.5.2 Release Notes (NVIDIA DRIVE PX 2 AutoChauffer)
January 9, 2019 - NVIDIA 340.46 RedHawk 5.4 Driver was Released (x86_64)
- Provides a RedHawk-optimized NVIDIA version 340.46 driver for RedHawk 5.4.x
- The software was provided solely for use with RedHawk 5.4.x
- Available on request for customers with active maintenance contracts -- contact your Concurrent Real-Time salesman or send email to support@concurrent-rt.com.
Dec 10, 2018 - RedHawk 7.3.5 was Released (x86_64)
RedHawk 7.3.5 is now available for x86_64 systems running CentOS, RHEL, and Ubuntu distributions.
This update includes kernel.org changes from version 4.4.138 and 4.4.162.
ccur-kernel-7.3.5 changelog
- The XTRACE_LOG_CUSTOM ioctl command has been expanded to log either binary or ascii data. Users will need to adjust their code to accommodate the expanded API.
- Add entry/exit xtrace tracepoints to deferred error interrupts.
- Do not allow timer migration to be disabled on shielded CPUs.
- Fix occasional migration prevention of timers off of a shielded CPUs.
- Defer kernel-address-space oriented tlb flushes directed to shielded CPUs to the next time those CPUs enter kernel mode, when those CPUs are running in user mode.
- Import 4.4.138-rt155.
- Import 4.4.162-rt175.
- Upgrade the Broadcom bnxt NIC driver to version 1.7.9.
Dec 6, 2018 - RedHawk OFED for InfiniBand 7.5 Released (x86_64)
OpenFabrics Enterprise Distribution 4.4-1 for use with RedHawk 7.5 was released on Dec 6th, 2018.
OFED is an optional product that works with RedHawk.
Contact your salesman or Concurrent Support for more information.
Dec 5, 2018 - NVIDIA 7.10.73 Driver with CUDA SDK 9.2 & 10.0 for Redhawk 7.x (x86_64)
This is the latest NVIDIA driver for RedHawk 7.x releases that include Concurrent Real-Time's real-time optimization.
The DVD also includes CUDA 9.0 and 10.0
This release is available upon request to RedHawk 7.x users that have an active maintenance contract.
Contact your salesman or Concurrent Support for more information.
Oct 9, 2018 - RedHawk 7.5.1 was Released (x86_64)
RedHawk 7.5.1 is now available for x86_64 systems running CentOS, RHEL, and Ubuntu distributions.
This update includes kernel.org changes from version 4.4.98 through 4.4.115.
View the RedHawk 7.5a Release Notes for information.
Sep 24, 2018 - RedHawk Architect version 7.5 was Released (x86_64)
RedHawk Architect 7.5 is now available.
It supports creating images for RedHawk 7.0, 7.2, 7.3 and 7.5.
Changes include:
- Added support for RedHawk 7.5, CentOS 7.5 and Red Hat Enterprise Linux 7.5 hosts.
- Added support for Fedora 28 hosts.
- Added support for NightStar 4.6.
- Added support for special file system types, tmpfs and bind.
- Implemented a new PXE diskless booting method using a Live RAMDISK. This method does not use NFS and does not require an ethernet connection after the PXE boot.
View the RedHawk Architect 7.5 Release Notes for information.
Jul 13, 2018 - RedHawk 7.3.2 Update Released (Jetson TX series)
RedHawk 7.3.2 is now available for the NVIDIA Jetson TX series; including the TX1, TX2, and TX2i.
View the RedHawk 7.3.2 Release Notes for the Jetson TX series for information.
Jul 10, 2018 - NightStar 4.6 Released (i386/x86_64 and arm64)
NightStar 4.6 is now available for i386/x86_64 and arm64 systems. It supports RedHawk systems running on CentOS, RHEL, and Ubuntu distributions.
View the NightStar 4.6 Installation Guide for more information.
Jul 8, 2018 - RedHawk 7.5 was Released (x86_64)
RedHawk 7.5 is now available for x86_64 systems running CentOS, RHEL, and Ubuntu distributions.
View the RedHawk 7.5 Release Notes for information.
May 10, 2018 - RedHawk 7.3.4 Update Released
RedHawk 7.3.4 is now available for x86_64 systems and for arm64 on the Mustang (X-C1). It is available for RedHawk systems running on CentOS, RHEL, and Ubuntu distributions.
ccur-kernel-7.3.4 changelog
- Import-4.4.115-rt130. This brings in the latest fixes to the Spectre and Meltdown security violations.
- Adjust the kernel source code and Makefiles so that it can be compiled with a new gcc compiler, gcc-7.3.0, without warning or error.
- Compile the kernel with gcc-7.3.0 with the retpoline extension enabled. This introduces the compiler-generated portion of the Spectre security violation mitigation (retpoline).
- Import OpenOnload-201710-u1. This brings in a version of OpenOnload that is compatible with the Meltdown security violation fixes introduced above, as well as bring in the latest vnet device support and assorted bugfixes. Affects only systems with an ethernet card from SolarFlare Corporation.
- Adjust a RedHawk-added idle spin method so that the spinning occurs in the inner rather than the outer idle loop, where the load on the system from idling is less.
- Increase the size of the kernel's CONFIG_LOCKDEP buffer. This allows lockdep to log more data before running out of space. Affects debug kernels only. This is a backport from newer versions of Linux.
- Modify unbound workqueue processing to honor shielding when an entire NUMA node is shielded. Prior to this fix, some system services would run on such shielded cpus in violation of the requirements of shielding.
- Prevent the smi sniffer, when enabled, from running on downed cpus. This releases system resources (power, bus cycles, cpu micro-ops) to the non-downed cpus. The smi sniffer is not enabled by default.
- Prevent RedHawk forced polling during idling (forcespin grub command line option) from being active on downed cpus. This releases system resources to the non-downed cpus.
- Adjust the kernels masterclock algorithm so that it works properly with clock frequency adjustments up to 100,000 ppm. Prior to this, it worked well with frequency adjustments of a few thousand ppm. Only affects systems having an RCIM card and using chronyd(8) instead of, say, ntpd(8) for time synchronization. One issue remaining is that the RCIM-III card can only change frequency up to 50,000 ppm. The new masterclock algorithm compensates by clamping frequency change to 50,000 ppm for this card. Chronyd can be kept from asking for more than 50,000 ppm by editing maxslewrate in /etc/chrony.conf. The RCIM-II does not have this problem.
- Fix hard-to-hit infinite recursion bug in rescheduling variables. Symptom is a kernel stack overflow in some process using rescheduling variables. The primary user of rescheduling variables is multitasking Ada programs compiled with the MaxADA compiler.
- Fix a race in shielding where a currently running hrtimer would not be migrated off a newly shielded cpu. This violates the rules of shielding when the timer in question is not associated with a real time process tied to the shielded cpu.
- Fix a bug in mainline Linux's internal-to-the kernel migrate_enable() service, where a migration that was being deferred to the next migrate_enable() did not occur. This affects only the prt kernels.
- Revert a page replication modification that revised locking around a radix_tree_insert call. Result should be fewer or no radix_tree_insert failure messages appearing in the kernel message log, and better page replication performance.
- Add a new command, FBS_GET_CYCLES, to the fbsctl(2) system call, and (in a separate package from the kernel) change the fbs library service fbscycle(3) to use it when available, rather than use the more heavy weight FBS_STAT command. This provides faster retrieval of the commonly needed FBS frame and cycle number.
- Import 4.4.126-rt141.
- Update NVIDIA kernel driver to 390.48.
March 25, 2018 - Manufacturing Survey
Concurrent Real-Time is conducting a survey which will help us measure and improve the quality of our products.
Please consider taking the survey which is very short. Click here.
March 24, 2018 - RedHawk 7.2.6 Update Released
The RedHawk 7.2.6 update is now available. Among other fixes and enhancements, it contains all the official Linux Meltdown mitigations available from kernel.org for the 4.1 kernel.
Additional RedHawk updates will be released as kernel.org releases more mitigations.
Meltdown and Spectre mitigations were also included in the March 9th, 2018 RedHawk 7.0.4 update and in the Jan 19th, 2018 RedHawk 7.3.3 update.
March 9, 2018 - RedHawk 7.0.4 Update Released
The RedHawk 7.0.4 update is now available. Among other fixes and enhancements, it contains all the official Linux Meltdown mitigations available from kernel.org for the 3.16 kernel.
Additional RedHawk updates will be released as kernel.org releases more mitigations.
Some Mitigations for Meltdown and Spectre were included in the Jan 19, 2018 RedHawk 7.3.3 update.
March 8, 2018 - Intermittent Network Problems Resolved
The intermittent network problems have been resolved. Thank you for your patience.
We are currently experiencing intermittent network outages on http://redhawk.concurrent-rt.com, especially with large downloads.
We know this is inconvenient and we are working hard to correct the problem.
Thank you for your patience. If you have an immediate need for software or documentation, please contact Concurrent Real-Time support as shown at the bottom of this page.
January 30, 2018 - redhawk.ccur.com retired
Effective Jan 30, 2018, the old redhawk.ccur.com software portal has been replaced by redhawk.concurrent-rt.com, which hosts this web page.
If you have used redhawk.ccur.com in the past, please read important information about the domain change.
January 19, 2018 - Fixes for Metldown/Spectre
Concurrent Real-Time is now in the process of integrating Meltdown and Spectre mitigations into all RedHawk 7.x and 6.x kernels, starting with the most recent releases.
RedHawk 7.3.3 is now available and contains all the official Linux mitigations available, and other kernels are now being modified and tested and will be released as testing completes.
May 15, 2017 - Concurrent Real Time Business Acquired
On May 15, 2017, Battery Ventures acquired the Real-Time business segment of Concurrent Computer Corporation.
The transaction created a new, independent operating business named Concurrent Real-Time.
Except for some website links and an upcoming domain name change, we expect there will be no changes to Real-Time business operations and no effect on our existing customer base. We will remain dedicated to continued product innovation, and our customers will continue to receive the same high quality support and professional service.
Please visit our new web site at http://concurrent-rt.com
March 21, 2017 - Network Time Protocol Update
On March 21, 2017 Foundation's NTP project released a major update to NTP 4.2. This update addresses medium, low and informational vulnerabilities to NTP.
All RedHawk customers running NTP version 4.2.x are strongly encouraged to update their systems to the latest version, ntp-4.2.9p10.
Further details about this update can be found at:
http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Security_Notice
Dec 31, 2016 - Network Time Protocol Update / Leap Second Added
On December 31, 2016, a leap second was added at midnight to the Coordinated Universal Time (UTC). In the past when a leap second was added some versions of Linux had issues with NTP not adjusting the system time accordingly. With that in mind, no matter what version of RedHawk that you are running it is recommended that you update the ntp, ntpdate and tzdata rpms either through RHEL or CentOS repositories. See below for customers using the ccur-ntp rpm.
For customers running RedHawk 5.4 you are strongly advised to download and install the latest 5.4.20 update as this contains a kernel fix that was uncovered after the last leap second was added. Those customers that have an RCIM with a GPS to control the time on their system are using the ccur-ntp rpm. If you do have this configuration it is advised to update to the latest kernel update for your version of RedHawk. There is no update needed for the ccur-ntp rpm.
Further details about NTP and leap seconds can be found at this link:
https://access.redhat.com/articles/15145Support:
If you need assistance, please contact the Concurrent Real-Time Software Support Center at our toll free number 1-800-245-6453. For calls outside the continental United States, the number is 1-954-283-1822. The Software Support Center operates Monday through Friday from 8 a.m. to 5 p.m., Eastern Standard Time.
You may also submit a request for assistance at any time by using the Concurrent Real-Time web site at http://www.concurrent-rt.com/customer-support or by sending an email to support@concurrent-rt.com.