Poly/ML

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698 discussions

Pattern matching compilation is very slow
by kostirya＠gmail.com 26 Jun '18

26 Jun '18

Hello. I found that Poly/ML very very slowly compiles (30 seconds) functions with very large count of pattern matching items (1400 items). I need to replace the pattern matching with many if-then-else. But the pattern matching works a faster for mlton and smlnj. Therefore, I want to use the pattern matching. :-) Also noticed that Poly/ML very slow for it. Even SML/NJ is faster for it. Below is the code for benchmark and result. fun fc 0wx41 f r = f (0wx61, r) | fc 0wx42 f r = f (0wx62, r) | fc 0wx43 f r = f (0wx63, r) ... | fc 0wx1f80 f r = f (0wx3b9, f (0wx1f00, r)) | fc 0wx1f81 f r = f (0wx3b9, f (0wx1f01, r)) | fc 0wx1f82 f r = f (0wx3b9, f (0wx1f02, r)) ... | fc 0wx1e920 f r = f (0wx1e942, r) | fc 0wx1e921 f r = f (0wx1e943, r) | fc w f r = f (w, r) 1400 items fun runBench N name f = let fun loop 0 f = () | loop i f = (f (); loop (i - 1) f) val t0 = Time.now () val _ = loop N f val t1 = Time.now () in print (name ^ " " ^ Real.toString(Time.toReal(Time.-(t1, t0))) ^ "\n") end val _ = runBench 1000000 "latin a" (fn () => (fc 0w97 (op ::) [])) val _ = runBench 1000000 "Sharp s" (fn () => (fc 0wxdf (op ::) [])) val _ = runBench 1000000 "Cyr Yi " (fn () => (fc 0wx407 (op ::) [])) val _ = runBench 1000000 "last " (fn () => (fc 0wx1e921 (op ::) [])) > time poly --script unicode-case.sml ; echo "===" ; time poly --script unicode-if.sml ; echo "===" ; time poly --script unicode-if-opt.sml latin a 4.557194 Sharp s 4.073306 Cyr Yi 2.902266 last 0.015322 47.325u 1.456s 0:48.23 101.1% 11246+419k 0+0io 0pf+0w === latin a 4.584374 Sharp s 0.065816 Cyr Yi 0.290468 last 4.698412 9.848u 0.046s 0:09.88 100.0% 11307+421k 0+0io 0pf+0w === latin a 0.015102 Sharp s 0.024983 Cyr Yi 0.030565 last 0.101628 0.463u 0.030s 0:00.43 113.9% 11499+428k 0+0io 0pf+0w MLton > ./unicode-case ; echo "===" ; ./unicode-if ; echo "===" ; ./unicode-if-opt latin a 0.00119 Sharp s 0.001167 Cyr Yi 0.001176 last 0.001172 === latin a 0.541467 Sharp s 0.024442 Cyr Yi 0.121234 last 0.537045 === latin a 0.013061 Sharp s 0.025635 Cyr Yi 0.154532 last 0.550286 > sml unicode-case.sml Standard ML of New Jersey v110.77 [built: Sun Jun 24 00:25:15 2018] [opening unicode-case.sml] [autoloading] [library $SMLNJ-BASIS/basis.cm is stable] [autoloading done] latin a 0.001608 Sharp s 0.00166 Cyr Yi 0.001546 last 0.001552 val fc = fn : word -> word list -> word list val runBench = fn : int -> string -> (unit -> 'a) -> unit - ^D > sml unicode-if.sml Standard ML of New Jersey v110.77 [built: Sun Jun 24 00:25:15 2018] [opening unicode-if.sml] [autoloading] [library $SMLNJ-BASIS/basis.cm is stable] [autoloading done] latin a 0.550017 Sharp s 0.02571 Cyr Yi 0.121336 last 0.548638 val fc = fn : word -> word list -> word list val runBench = fn : int -> string -> (unit -> 'a) -> unit - ^D > sml unicode-if-opt.sml Standard ML of New Jersey v110.77 [built: Sun Jun 24 00:25:15 2018] [opening unicode-if-opt.sml] [autoloading] [library $SMLNJ-BASIS/basis.cm is stable] [autoloading done] latin a 0.014573 Sharp s 0.027239 Cyr Yi 0.124949 last 0.557338 val fc = fn : word -> word list -> word list val runBench = fn : int -> string -> (unit -> 'a) -> unit - ^D

1 0

RPC in SML
by Ramana.Kumar＠cl.cam.ac.uk 08 Jun '18

08 Jun '18

Dear Poly/ML list, I'm exploring how to make remote procedure calls (RPC) from Standard ML. My understanding is that this is not part of the language or basis library in any form, but that there is FFI support in Poly/ML for it. Is that correct? Is there any documentation for the Poly/ML FFI or examples of its use that someone could point me to? Thanks much, Ramana

2 1

Building on Windows in batch mode -- Visual Studio
by makarius＠sketis.net 08 Mar '18

08 Mar '18

Dear Windows experts, the task is to build the Poly/ML such that: * the build works on the command-line / in batch mode * the resulting poly.exe is a command-line tool, not a Windows desktop application. Based on recommendations by David Matthews from some years ago, I have done that so far with MinGW -- using a rather old version of gcc. See also: http://isabelle.in.tum.de/repos/isabelle/file/839de121665c/Admin/polyml/INS… http://isabelle.in.tum.de/repos/isabelle/file/839de121665c/Admin/polyml/REA… http://isabelle.in.tum.de/repos/isabelle/file/839de121665c/src/Pure/Admin/b… (with specific options for x86-windows and x86_64-windows) I wonder if it would be better to use the free community version of Visual Studio instead: https://www.visualstudio.com/downloads Has anybody tried this and can report some experience with it? Makarius

3 2

fancy tty tricks (with curses?)
by Michael.Norrish＠data61.csiro.au 27 Feb '18

27 Feb '18

Has anyone used the FFI interface or similar to link libcurses or similar? I could try to talk ANSI terminal sequences directly, but querying terminal state with these seems pretty painful. (At the very least one has to put standard input into a non-blocking state?, and I found the Basis documentation on how I might do this very confusing.) And then one is breaking the very abstraction that curses is trying to provide... As a bare minimum for example, I'd like to get the width of the current terminal. Michael

2 1

Poly/ML as alternative to ...
by makarius＠sketis.net 20 Feb '18

20 Feb '18

Dear Poly/ML enthusiasts, quite often the best-known system in a certain category is not really the best. The website https://alternativeto.net occasionally helps to turn perception into reality, by choosing a proper alternative. I have already created entries for some implementations of Standard ML on this site, including https://alternativeto.net/software/poly-ml Maybe some people on this list want to add some more, add likes, comments etc. as a proof that Poly/ML is presently the center of active Standard ML development. Makarius

2 1

build failure on recent Cygwin + Windows 10
by Michael.Norrish＠data61.csiro.au 20 Feb '18

20 Feb '18

../configure seems to work fine, as does much of make, but eventually I get an error where it is trying to make a libtool call involving polyexport.o, and it complains that polyexport.o doesn?t actually exist. Is there something obvious I may be doing wrong? Thanks, Michael

2 2

Poly/ML with libgmp on x86_64-darwin
by makarius＠sketis.net 15 Feb '18

15 Feb '18

Dear Poly/ML enthusiasts and experts of the gcc toolchain on macOS, building Poly/ML with libgmp has always been a challenge, but I have now managed as follows for x86_64-darwin. The approach works as follows: (1) Build libgmp from sources. (2) Build Poly/ML --with-gmp using that homemade version. (3) Copy libgmp.10.dylib into the Poly/ML lib directory and adjust locations with install_name_tool Afterwards it is possible to copy the resulting Poly/ML target directory to a different location on a different machine, with a different (newer) macOS version. The details are in the included build.txt (e.g. for macOS 10.12 Sierra). This is not a shell script! It should be run carefully line-by-line. Towards the end there are two install_name_tool invocations with locations determined beforehand by "otool -L". The final "otool -L" is just a sanity check, the result is like this: target/bin/poly: @executable_path/../lib/libpolyml.9.dylib (compatibility version 10.0.0, current version 10.0.0) @executable_path/../lib/libgmp.10.dylib (compatibility version 14.0.0, current version 14.2.0) /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 307.4.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.0.0) This setup is already part of "isabelle build_polyml", see http://isabelle.in.tum.de/repos/isabelle/file/8b19a8a7f029/src/Pure/Admin/b… -- but that assumes that libgmp has been installed in a standard place (e.g. /usr/local/lib). I wonder if anybody has managed to build libgmp for x86-darwin (32bit) platform. That platform variant still provides better performance for big applications like Isabelle, because it requires only half the memory. Makarius

5 7

Building portable Poly/ML on Linux
by makarius＠sketis.net 11 Feb '18

11 Feb '18

Dear Poly/ML enthusiasts and experts of the gcc toolchain, we've occasionally discussed the problem of building a "portable" Poly/ML on Linux, such that the resulting directory does not have to be "installed" in a fixed location such as /usr/bin and /usr/lib. Here is my current approach to it, using an "rpath" in the poly executable and the chrpath tool to finalize it (on Ubuntu 16.04.3 LTS): make distclean rm -rf target ./configure --prefix="$PWD/target" LDFLAGS=-Wl,-rpath,_DUMMY_ make compiler && make compiler && make install chrpath -r '$ORIGIN/../lib' target/bin/poly Here is a proof for the result: ldd target/bin/poly linux-vdso.so.1 => (0x00007fffdc799000) libpolyml.so.9 => /home/makarius/lib/polyml/polyml-git/target/bin/../lib/libpolyml.so.9 (0x00007f4b02d98000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4b029ce000) ... Note that the approach with -rpath,_DUMMY_ and separate chrpath has two main reasons: (1) I did not manage to pass $ORIGIN through LDFLAGS, configure, Makefile etc. unharmed, despite some attempts to escape the $ and some more backslashes. (2) The -Wl,-rpath,_DUMMY_ retains a trace from the original target directory, but chrpath -r resets all that cleanly. I am posting this here for the record, as a solution that works so far, see also http://isabelle.in.tum.de/repos/isabelle/file/8b19a8a7f029/src/Pure/Admin/b… Maybe there are further recommendations for simplification, e.g. smarter LDFLAGS could make the chrpath invocation obsolete (avoiding the requirement to install that tool from a separate Linux package). Makarius

3 5

polyc and libraries
by David.Matthews＠prolingua.co.uk 15 Jan '18

15 Jan '18

The polyc script has been developed mainly to simplify the linking of an exported ML function and in particular to try to capture the libraries that need to be included. I've been having another look at this because of an issue that was reported a while back. Up till now the linking step has included all the libraries that were needed in order to link libpolyml itself. That was extracted by the configure script. It turns out that this is right if libpolyml is compiled as a static library but has a problem if libpolyml is a dynamic library. Object files exported by PolyML.export make reference to external symbols from libpolyml but do not directly reference anything else. If libpolyml is a dynamic library it exports these symbols but all the other dependencies are satisfied by loading the appropriate libraries dynamically. The issue was reported in the Fedora distribution but may also affect other distributions that package up Poly/ML and have separate packages for libraries (e.g. libgmp and libffi) and development packages. They were building libpolyml as a shared library but because polyc included the dependencies of libpolyml itself polyc was including -lgmp -lffi in the link step. This meant that it needed the development versions of these libraries even though they were not actually used. I've now modified the configure script so that polyc only includes the dependent libraries if libpolyml has been built with shared libraries disabled and at the same time changed the default so that it builds a shared library unless --disable-shared is given. Hopefully this hasn't broken anything but I'd appreciate any reports of problems. David

4 11

Assertion failure in scanaddrs
by Ramana.Kumar＠cl.cam.ac.uk 15 Jan '18

15 Jan '18

I got this error building the CakeML regression test ( https://cakeml.org/regression.cgi/job/152): scanaddrs.cpp:218: void ScanAddress::ScanAddressesInRegion(PolyWord*, PolyWord*): Assertion `obj->ContainsNormalLengthWord()' failed. Is this worth further investigation? I presume it's somehow due to high memory pressure, though it'd be nice to be more robust to that with a graceful fail.

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