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Programming: POCL 1.5, Remote Technical Work, LLVM and Ada++

Submitted by Roy Schestowitz on Saturday 4th of April 2020 02:20:16 AM Filed under
Development
  • pocl v1.5 released

    A more detailed changelog here.

    Please note that there's an official pocl maintenance policy in place. This text describes the policy and how you can get your favourite project that uses OpenCL to remain regression free in the future pocl releases.

  • POCL 1.5 Released With Performance Improvements, Fixes For OpenCL On CPUs

    POCL 1.5 has been released as the "Portable CL" implementation for running OpenCL on CPUs and other devices with LLVM back-ends.

    The POCL project lets OpenCL 1.2~2.0 run over CPU back-ends as well as for running OpenCL on NVIDIA GPUs over CUDA, on AMD GPUs via HSA, and other accelerator targets that have LLVM back-end coverage.

  • How to work from home like a pro

    Across the globe, businesses are transitioning to remote work. While remote work or "working from home" has been an overall growing trend, the recent push to transition has been driven by the COVID-19 response; organizations are asking staff to work from home to help limit the spread of the Coronavirus.

    If you are like many of your peers, you may quite suddenly find yourself working from home. How can you remain productive at home when you're used to going into an office?

    A year ago, I launched my own business as a consultant. When I'm not working with a client, I'm working from my home, and during that time, I've learned a thing or two about how to be most effective. I'd like to share a few of those tips here.

  • LLVM Lands Performance-Hitting Mitigation For Intel LVI Vulnerability

    Made public in March was the Load Value Injection (LVI) attack affecting Intel CPUs with SGX capabilities. LVI combines Spectre-style code gadgets with Meltdown-type illegal data flows to bypass existing defenses and allow injecting data into a victim's transient execution. While mitigations on the GNU side quickly landed, the LLVM compiler mitigations were just merged today.

    Intel quickly provided LVI mitigations for the GNU Assembler as new opt-in flags. These assembler mitigations end up introducing many more load fences (LFENCE) to mitigate and cause quite some performance hits but is not enabled by default.

    Intel and other developers in the LLVM community have been working on their respective mitigations for LVI. In fact, a Google engineer proposed a new "SESES" technique for helping address LVI and speculative execution in general. But with Google's own benchmark that only left 7% the original performance (as in down 93%) for the company's BoringSSL workload as their internal fork of OpenSSL.

  • Ada++ Wants To Make The Ada Programming Language More Accessible

    Ada is a beautiful programming language when it comes to code safety with it continuing to be used by aircraft and other safety critical systems. There is now Ada++ as an unofficial fork of the language focused on making the language more accessible and friendlier in an era of the likes of Rust and Golang attracting much interest.

    Ada++ allows for curly braces in place of begin/end keywords, new types like Int_32 / Int_64 / Char_8 / Bool, allow pragmas to be set with a leading # or :, supporting the ++ operator, a raise when construct, and other changes in discussion.

    Ada++ is currently implemented as a forked version of GCC with its Ada front-end being modified but there is talk of a possible LLVM front-end in the future.

»

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