WOA Issue 19

WOA Issue 19

In this issue

  • Works on Arm at Open Source Summit, Los Angeles
  • Electron port to arm64
  • LLVM 5.0.0 is out
  • SLES 12 SP3 is out
  • qemu on GICv3 machines

Works on Arm at Open Source Summit, Los Angeles

Your editor will be at the Open Source Summit in Los Angeles the week of September 11-14, 2017. Packet will have a booth, and I’ll be across the show floor at the Arm Holdings booth, demonstrating a new Works on Arm website.

Electron port to arm64

Electron is a development tool that allow you to build cross platform desktop apps with JavaScript, HTML, and CSS. It is based on Node.js and Chromium and is used by the Atom editor and many other apps.

As of version v1.8.0 beta, arm64 builds are available for Electron. Thanks to Hamid Zamani (HAMIDx9) for the port, which has been tested successfully on the 64-bit Odroid C2. Note: This is a beta release. This is the first release running on upgraded versions of Chrome/Node.js/V8 and most likely will have have some instability and/or regressions.

LLVM 5.0.0 is out

The LLVM compiler is out in a version 5.0.0 release. LLVM implments the Clang compiler for C, C++, and Objective C.

The release notes suggest improvements to code generation on aarch64 targets, with resulting speedups for code making use of AArch64 AES crypto instructions.

If anyone has public benchmarks showing AES performance between LLVM 5.0.0 and previous versions please share! The comments in the codebase suggest a 40% speedup on private proprietary microbenchmarks for this feature for this release.

SLES 12 SP3 is out

SLES (SUSE Linux Enterprise Server) 12 SP3 is out from SUSE. This new release of August 30, 2017 is part of a 13-year lifecycle for the platform, with 10 years of General Support and 3 years of Extended Support.

The release contains new support for the following platforms:

  • AppliedMicro X-Gene 3
  • Cavium ThunderX2 CN99xx
  • HiSilicon Hi1616
  • Marvell Armada 7K/8K
  • Qualcomm Centriq 2400 series
  • Rockchip RK3399

The release notes also give details about firmware upgrades required to support AppliedMicro X-Gene platforms.

I’m not personally running SLES 12 anywhere; first-hand reports from the field would be welcomed.

QEMU on GICv3 machines

From this morning’s inbox –

QEMU is a generic and open source machine emulator and virtualizer. The latest release is 2.9.1 as of September 7, 2017; there is also a 2.10.0 version updated on August 30, 2017. QEMU provides both emulation (so that you can run binaries of one architecture on another) as well as virtualization (so that you can run a virtual machine on your host).

GICv3 is the third version of the Generic Interrupt Controller Architecture from Arm. It specifies how to configure an interrupt controller in a bare metal environment, such as one might need to do for running a machine emulator and virtualizer.

If you are running QEMU on Cavium hardware you may find this error message

KVM_SET_DEVICE_ATTR failed: No such device

when launching LinuxKit or more generally when launching QEMU.

If so, then please review the following reports which provide detail about this issue:

and explore the use of the flag -machine virt,gic_version=3 when running QEMU on GICv3 hardware such as the Cavium ThunderX.

Additional detailed information about GICv3 from Arm Holdings Info Center:

Subscription information

Works on ARM News is released weekly on Fridays. Follow @worksonarm on Twitter for the weekly link, or follow the worksonarm-news project on Github for notifications. Email to [email protected] if you’d like a direct email.

Back and current issues are available from the Works on ARM News archive on Github.

You can unsubscribe at any time.

Explore Topics