Linux Kernell to be Updated to 4.18

Another update brings new features and improvements
14 August 2018   1424

Linus Torvalds announced the release of the Linux kernel 4.18. The changes affect 13,067 files. Developers were able to make the kernel more compact by removing 677,480 and adding 578,788 code blocks.

It was a very calm week, and arguably I could just have released on schedule last week, but we did have some minor updates. Mostly networking, but some vfs race fixes (mentioned in the rc8 announcement as "pending") and a couple of driver fixes (scsi, networking, i2c). Some other minor random things (arm crypto fix, parisc memory ordering  fix).

Linus Torvalds

Creator, Linux

Two months passed since the announcement of the release candidate Linux 4.18-rc1, the developers conducted testing and eliminated kernel problems.

Most Important Changes
Changes affected the work with processors, file system and data storage, graphics processing. Some new features of Linux 4.18 should be highlighted:

  • Basic support for Qualcomm Snapdragon 845 SoC.
  • Support for Steam Controller from Valve.
  • The core infrastructure is added to the kernel for BPFILTER, which processes the iptables API requests and passes them to BPF programs.
  • DRM-driver AMDGPU now supports VegaM graphics processing on Intel Kabylake-G CPUs, as well as the forthcoming graphics card known as AMD Vega 20 GPU.
  • Various AMDGPU power management enhancements, such as profiles for Vega.
  • The AMDKFD kernel driver now supports GFX9 / Vega hardware.
  • Intel finalized support for the micro-architecture of Ice Lake.
  • Implemented by DM Writecache, which can be used to cache write operations of blocks on SSD-drives or in permanent memory.
  • Improved support for USB 3.2 and USB Type-C.
  • Already started work on a large update of Linux 4.19. It is assumed that this will be the latest version before 5.0.

Linux, open source OS, is developing rapidly. Only in 2018 came out the kernel versions 4.15, 4.16, 4.17, and now 4.18.

LLVM 10.0.0 to be Released

New version of the popular development toolkit brings, among other things, support for the C++ Concepts
26 March 2020   969

After six months of development, the release of the LLVM 10.0 project, a GCC-compatible toolkit (compilers, optimizers, and code generators), compiling programs into an intermediate bitcode of RISC-like virtual instructions (a low-level virtual machine with a multi-level optimization system), is presented. The generated pseudo-code can be converted using the JIT compiler into machine instructions directly at the time of program execution.

Among the new features of LLVM 10.0, there are support for C ++ Concepts (C ++ Concepts), termination of the launch of Clang in the form of a separate process, support for CFG checks (control flow guard) for Windows, and support for new CPU features.

The main innovations of LLVM 10.0:

  • New interprocedural optimizations and analyzers have been added to the Attributor framework. The prediction of the state of 19 different attributes, including 12 attributes of 12 LLVM IR and 7 abstract attributes such as liveness, is provided.
  • New built-in compiler matrix mathematical functions (Intrinsics) have been added, which, when compiled, are replaced by effective vector instructions.
  • Numerous improvements to the backends for the X86, AArch64, ARM, SystemZ, MIPS, AMDGPU, and PowerPC architectures. Added support for Cortex-A65, Cortex-A65AE, Neoverse E1 and Neoverse N1 CPUs. For ARMv8.1-M, ​​the code generation process has been optimized (for example, support for loops with minimal overhead has appeared) and support for auto-vectorization using the MVE extension has been added. Improved support for CPU MIPS Octeon. PowerPC includes vectorization of mathematical routines using the MASSV (Mathematical Acceleration SubSystem) library, improved code generation, and optimized memory access from loops. For x86, the processing of vector types v2i32, v4i16, v2i16, v8i8, v4i8 and v2i8 has been changed.
  • Improved code generator for WebAssembly. Added support for TLS (Thread-Local Storage) and atomic.fence instructions. Significantly expanded support for SIMD. WebAssembly object files added the ability to use function signatures with multiple values.
  • When processing cycles, the MemorySSA analyzer is used to determine the dependencies between different memory operations. MemorySSA can reduce compilation and execution time, or can be used instead of AliasSetTracker without sacrificing performance.
  • The LLDB debugger has significantly improved support for the DWARF v5 format. Improved build support with MinGW and added the initial ability to debug Windows executable files for ARM and ARM64 architectures. Added descriptions of options offered when autocompleting input by pressing tabs.
  • Enhanced LLD Linker Features. Improved support for the ELF format, including full compatibility of glob templates with the GNU linker, added support for the compressed debug sections ".zdebug", added the PT_GNU_PROPERTY property to determine the section (can be used in future Linux kernels), implemented modes "-z noseparate-code", "-z separate-code" and "-z separate-loadable-segments". Improved support for MinGW and WebAssembly.

Get more at the release notes.