Mailman 3 March 2022 - pypy-dev

PyPy Winter Sprint + cpyext
by Stefan Beyer 20 Dec '22

20 Dec '22

Hey everyone! Those of you who attended or followed one of the last two winter sprints in Leysin might know me, the others probably won't. I'm (still) a Master's student writing my thesis on PyPy's current issue with cross-heap cycles when using cpyext. The main point is, that they are not collected and stay around as floating garbage, even if they are not reachable any more. Correct me if I'm wrong, but I didn't notice anyone else working on that topic (and/or committing something) since I've picked it up two years ago (yeah, I know, that long ago...). I saw that you would be working on "cpyext performance and completeness" during the current winter sprint this week and thought that this might also concern my thesis. So I thought I'll give you an update. I recently pushed my current (non-optimized, breaking-some-tests, but more or less working) implementation of the "CPython-style" GC-extension for cpyext. It is still in an early stage and not all cases (legacy and non-legacy-finalizers, weakrefs) are handled. However, I picked up some pace during the last couple of weeks and I'm determined to finish this implementation during the following weeks (some quirks with the tests have been haunting me, but I think I figured most of them out by now). After that, I will implement a second alternative implementation (to compare to, mostly for the sake of my thesis), which will take some more time. I also added a couple of fancy test cases (the so called "dot-tests"), so that we can test complex object graphs a little bit easier (and also because it was kind of cool to have another language inside PyPy/RPython, even if it was only for the tests...), with more test cases to come (the current ones are a bit messy). None of the new changes concerning low-latency applications are currently integrated, but that should not be too hard. I guess it won't make much sense for me to join you at this year's winter sprint, especially as I won't be able to get there before Thursday, but I might be able to join you over the IRC channel (or some other form of communication if you like). If there is anything that is worth discussing please let me know! Also feel free to comment on my code, but beware that I might change some things once I try to do some optimizations (probably not many, but at least fix the worst issues) and make it a little bit more readable. You can find my code on the cpyext-gc-cycle branch.<https://bitbucket.org/pypy/pypy/commits/branch/cpyext-gc-cycle> Looking forward to hearing from you! Greetings, Stefan

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How have you found compiling in OpenSSL and other libraries into your relocatable builds?
by Brett Cannon 31 Mar '22

31 Mar '22

I noticed that https://www.pypy.org/download.html says that "the linux binaries ship an OpenSSL library". Have you found that to be an issue in any way? Have users been accepting of it? I ask as I'm contemplating trying to get relocatable builds for CPython on Linux (to start), and I suspect the OpenSSL question is going to be one of the bigger/stickier discussion points and having some real-world experience/information on the topic would probably help.

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PyPy v7.3.9 was released
by Matti Picus 30 Mar '22

30 Mar '22

I released PyPy v7.3.9. This is mainly a security update, but we also fixed a number of PyPy3.9 edge cases and cleaned up a performance regression. You can read more about it on blog post https://www.pypy.org/posts/2022/03/pypy-v738-release.html The downloads are at https://downloads.python.org/pypy/, and checksums at https://www.pypy.org/checksums.html Unfortunately readthedocs is not building the latest version of the release note. You can read the raw one at https://foss.heptapod.net/pypy/pypy/-/blob/branch/default/pypy/doc/release-…. Hopefully that will get cleaned up soon. Please report any other problems. Matti

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PYPYLOG
by Aksam Lwanga 22 Mar '22

22 Mar '22

Hey. am confused about the debugging variable for PYPYLOG, have set its value, am trying to run the benchmark so that I can get some insights on how to use it in the future, however when I compile my file it doesn't show me the output file, do I need to set any other thing apart from the PYPYLOG environment variable, Which commands ensures that have run pypy to ensure that debugging is enabled?, any assistance is highly appreciated.

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Building a C extension that uses PyDictKeysObject on Pypy 3
by Marco Sulla 13 Mar '22

13 Mar '22

Hello. Sorry for posting in the dev mailing list, I did not found an user list for Pypy. I developed a C extension for CPython 3.6+. This extension uses PyDictKeysObject. I tried to enable Pypy in cibuildwheel, but I get a compilation error for PyDictKeysObject. What object can be used by C extension in Pypy instead of PyDictKeysObject?

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PyPy Benchmarks
by Aksam Lwanga 09 Mar '22

09 Mar '22

Am trying to run pypy benchmarks and I also wanted to pass jit as an argument to benchmark however have failed to achieve this. ./run_local.py /home/aksam/pypy/pypy-c --args=--jit=[options] such has failed .Any help provided will be helpful to me. regards Lwanga

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CfP: ICOOOLPS'22: 17th Workshop on Implementation, Compilation, Optimization of OO Languages, Programs and Systems
by Carl Friedrich Bolz-Tereick 08 Mar '22

08 Mar '22

Call for Contributions The ICOOOLPS workshop series brings together researchers and practitioners working in the field of language implementation and optimization (even beyond the historical OO background of the workshop). The goal of the workshop is to discuss emerging problems and research directions, as well as new solutions and techniques. https://2022.ecoop.org/home/ICOOOLPS-2022 We hope to provide a space for participation and discussion and in particular to discuss your work in progress. That’s why we’ll have two additional submission categories for position papers and talks. We also accept talk proposals for papers that have appeared at some other past conference, but didn't receive much discussion there due to the conference being cancelled or virtual because of Covid. A non-exclusive list of topics of interest for this workshop is: - Implementation and optimization of fundamental languages features (from automatic memory management to metaprogramming) - Runtime systems technology (libraries, virtual machines) - Static, adaptive, and speculative optimizations and compiler techniques - Meta-compilation techniques and language-agnostic approaches for the efficient implementation of languages - Compilers (intermediate representations, offline and online optimizations,…) - Empirical studies on language usage, benchmark design, and benchmarking methodology - Resource-sensitive systems (real-time, low power, mobile, cloud) - Studies on design choices and tradeoffs (dynamic vs. static compilation, heuristics vs. programmer input,…) - Tooling support, debuggability and observability of languages as well as their implementations Workshop Format The workshop welcomes the presentation and discussion of new ideas and emerging problems. We aim to provide an environment to present and discuss your work at different stages of maturity. Therefore we provide three submission categories: 1. Full papers (up to 12 pages), which will be included in the proceedings; 2. Position papers (up to 4 pages), for work in progress, ideas in early stages; 3. Talks, Demos. Please note that option (1) features a different submission deadline than the rest and will include a short rebuttal period, in which authors will be able to answer reviewers comments. Submission To submit a paper please use the official “ACM Master article template”, which can be obtained from the ACM Proceedings Template pages. ICOOOLPS features a light-weight double-blind review process. Authors should omit their names in the submission. Use the sigconf option as well as review and anonymous, i.e., place the following at the start of the latex document: \documentclass[sigconf,review,anonymous]{acmart}. Dates Thu 24 Mar 2022, Submissions (Full Papers) Thu 21 Apr 2022, Submission Talks, Demos, Position Papers Sat 23 - Fri 29 Apr 2022, Rebuttal Period Fri 6 May 2022, Notification Mon/Tue 6-7 June 2022, Workshop

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PYPY- Trace Limit
by Aksam Lwanga 07 Mar '22

07 Mar '22

Hello , I would like to understand how to set pypy trace limit . Any link available for use will highly help me.

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