What Does the New JBoss EAP CD Release Stream Mean for Developers?

A new release stream of Red Hat JBoss Enterprise Application Platform is now available: JBoss EAP continuous delivery (JBoss EAP CD).

JBoss EAP CD provides rapid incremental releases of new JBoss EAP capabilities approximately every quarter and is delivered only in Red Hat OpenShift image format.

What does this new JBoss EAP CD release stream mean for developers?

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SystemTap’s BPF Backend Introduces Tracepoint Support

This blog is the third in a series on stapbpf, SystemTap’s BPF (Berkeley Packet Filter) backend. In the first post, Introducing stapbpf – SystemTap’s new BPF backend, I explain what BPF is and what features it brings to SystemTap. In the second post, What are BPF Maps and how are they used in stapbpf, I examine BPF maps, one of BPF’s key components, and their role in stapbpf’s implementation.

In this post, I introduce stapbpf’s recently added support for tracepoint probes. Tracepoints are statically-inserted hooks in the Linux kernel onto which user-defined probes can be attached. Tracepoints can be found in a variety of locations throughout the Linux kernel, including performance-critical subsystems such as the scheduler. Therefore, tracepoint probes must terminate quickly in order to avoid significant performance penalties or unusual behavior in these subsystems. BPF’s lack of loops and limit of 4k instructions means that it’s sufficient for this task.

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Expanding architectural choices to better arm Red Hat Enterprise Linux developers

Red Hat Enterprise Linux continues to deliver the best possible experience for enterprise system administrators and developers, as well as provide a solid foundation for moving workloads into both public and private clouds. One of the ways to enable such ubiquity is Red Hat’s multi-architecture initiative, which focuses on bringing Red Hat’s software portfolio to different hardware architectures.

Last week, Red Hat Enterprise Linux 7.5 went live. It brought forward several improvements relevant to developers and system administrators such as advanced GUI system management via the Cockpit console, which should help new Linux administrators, developers, and Windows users to perform expert tasks without having to get into the command line.

This release also marks a new milestone for Red Hat Enterprise Linux: all supported architectures are now simultaneously enabled. The list of supported architectures includes x86_64, PowerPC Big Endian and Little Endian, s390x, and the more recently introduced 64-bit Arm and IBM POWER9 architectures.

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New Red Hat compilers toolsets in beta: Clang and LLVM, GCC, Go, Rust

Twice a year, Red Hat distributes new versions of compiler toolsets, scripting languages, open source databases, and/or web tools, etc. so that application developers will have access to the latest, stable versions. These Red Hat supported offerings are packaged as Red Hat Software Collections (scripting languages, open source databases, web tools, etc.), Red Hat Developer Toolset (GCC), and the recently added compiler toolsets Clang/LLVM, Go, and Rust. All are yum installable, and are included in most Red Hat Enterprise Linux subscriptions and all Red Hat Enterprise Linux Developer Subscriptions. Most Red Hat Software Collections and Red Hat Developer Toolset components are also available as Linux container images for hybrid cloud development across Red Hat Enterprise Linux, Red Hat OpenShift Container Platform, etc.

The new/updated compiler toolsets are:

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Recommended compiler and linker flags for GCC

Did you know that when you compile your C or C++ programs, GCC will not enable all exceptions by default?  Do you know which build flags you need to specify in order to obtain the same level of security hardening that GNU/Linux distributions use (such as Red Hat Enterprise Linux and Fedora)? This article walks through a list of recommended build flags.

The GNU-based toolchain in Red Hat Enterprise Linux and Fedora (consisting of GCC programs such as gcc, g++, and Binutils programs such as as and ld)  are very close to upstream defaults in terms of build flags. For historical reasons, the GCC and Binutils upstream projects do not enable optimization or any security hardening by default. While some aspects of the default settings can be changed when building GCC and Binutils from source, the toolchain we supply in our RPM builds does not do this. We only align the architecture selection to the minimum architecture level required by the distribution.

Consequently, developers need to pay attention to build flags, and manage them according to the needs of their project for optimization, level of warning and error detection, and security hardening.

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Introducing stapbpf – SystemTap’s new BPF backend

SystemTap 3.2 includes an early prototype of SystemTap’s new BPF backend (stapbpf). It represents a first step towards leveraging powerful new tracing and performance analysis capabilities recently added to the Linux kernel. In this post, I will compare the translation process of stapbpf with the default backend (stap) and compare some differences in functionality between these two backends.

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Running HPC workloads across multiple architectures with Red Hat Enterprise Linux

In this article, I want to provide some background details about our recently developed demonstration video – “Running Game of Life across multiple architectures with Red Hat Enterprise Linux“.

This video shows the Game of Life running in a heterogeneous environment using three 64-bit hardware architectures: aarch64 (ARM v8-A), ppc64le (IBM Power little endian) and x86_64 (Intel Xeon). If you are not familiar with the rules of this cellular automaton, they are worth checking out via the reference above.

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New Red Hat Developer Toolset 6 now in beta

Today, Red Hat announced the beta availability of Red Hat Developer Toolset 6.0 Beta. Accessible through the Red Hat Developer Program and related Red Hat Enterprise Linux subscriptions, including the no-cost Red Hat Enterprise Linux Developer subscription, Red Hat Developer Toolset enables developers to compile applications once and deploy across multiple versions of Red Hat Enterprise Linux.

Updated components within Red Hat Developer Toolset 6.0 Beta include versions of:

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