#pypy on 2020-07-02 — irc logs at freenode.irclog.whitequark.org

2019-08-29 19:33 cfbolz changed the topic of #pypy to: PyPy, the flexible snake (IRC logs: https://quodlibet.duckdns.org/irc/pypy/latest.log.html#irc-end ) | use cffi for calling C | if a pep adds a mere 25-30 [C-API] functions or so, it's a drop in the ocean (cough) - Armin

00:24 <bbot2> Failure: http://buildbot.pypy.org/builders/own-linux-s390x/builds/1548 [default]

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01:06 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-linux-s390x/builds/1351 [default]

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01:49 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-linux-aarch64/builds/530 [default]

02:02 <whitequark> so weirdly the answer is that the original AoS design performs best with a huge margin

02:03 <whitequark> i dunno. thanks for help everyone!

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02:56 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-win-x86-32/builds/5351 [default]

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04:49 <mattip> anyone looking for a fun little challenge: find where PyPy 3.6 v7.3.1 is not properly respecting os.env['CC'] in this failing test

04:49 <mattip> https://github.com/pypa/distutils/pull/1

04:50 <mattip> it is part of an effort to move distutils out of stdlib and into setuptools

05:00 <bbot2> Started: http://buildbot.pypy.org/builders/jit-benchmark-linux-x86-64/builds/2977 [default]

05:07 <mattip> trying to take a quick look at the winconsole branch. In rffi, is there a uint16_t ?

05:07 <mattip> (windows calls this a WORD as opposed to DWORD which is 32 bit)

05:07 <mattip> https://docs.microsoft.com/en-us/windows/win32/winprog/windows-data-types#dword

05:08 <mattip> ahh, yes, USHORT

05:08 <mattip> so it seems the line defining WORD in rwin32.py is wrong?

05:15 <mattip> it is not widely used, and the alignment is wierd, so maybe the wrong definition was not visible

06:28 <fijal> "I want to code a bi elliptical transfer in python,can you help me?"

06:29 <fijal> email from someone random

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07:13 <bbot2> Success: http://buildbot.pypy.org/builders/jit-benchmark-linux-x86-64/builds/2977 [default]

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13:16 <tos9> hey don't post my emails publically

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14:15 <ofir> is there an efficient way to write a bulk of characters (memcpy) to an FFI buffer?

14:16 <ofir> my_data = b'\xff' * 100; dram_addr = 0xdeadbeef; buf = _mylib.ffi.cast("char *", dram_addr); py_buf = _oclpy.ffi.buffer(buf, size); py_buf[:size] = my_data

14:16 <ofir> will something like that?

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14:17 <ofir> work*

14:23 <arigo> yes, or use directly https://cffi.readthedocs.io/en/latest/ref.html#ffi-memmove

14:26 <arigo> (in this case, _oclpy.ffi_memmove(buf, my_data, size) )

14:29 <ofir> thanks!

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