Michael Ferguson mppf

mppf / testforall-output.txt

Last active October 9, 2025 14:47

Chapel Operations Involving Unexpected Locales

	output of ./testforall -nl 4 \| grep 'node 1' with chpl 75c9635e6a85a557758397b2cf60d62443032270


	Create and destroy a Block Domain distributed to Locales 2,3 (ideally should not involve node 1)
	0: $CHPL_HOME/modules/internal/LocaleModelHelpFlat.chpl:133: remote non-blocking executeOn, node 1
	0: $CHPL_HOME/modules/internal/LocaleModelHelpFlat.chpl:133: remote non-blocking executeOn, node 1
	0: $CHPL_HOME/modules/internal/LocaleModelHelpFlat.chpl:133: remote non-blocking executeOn, node 1
	0: $CHPL_HOME/modules/internal/LocaleModelHelpFlat.chpl:133: remote non-blocking executeOn, node 1
	Create and destroy a Block Array distributed to Locales 2,3 (ideally should not involve node 1)
	0: $CHPL_HOME/modules/internal/LocaleModelHelpFlat.chpl:133: remote non-blocking executeOn, node 1

mppf / chapel.rb

Created February 2, 2022 14:20

draft homebrew formula for Python 3.10 and Chapel 1.25.1

	class Chapel < Formula
	desc "Programming language for productive parallel computing at scale"
	homepage "https://chapel-lang.org/"
	url "https://github.com/chapel-lang/chapel/releases/download/1.25.1/chapel-1.25.1.tar.gz"
	sha256 "0c13d7da5892d0b6642267af605d808eb7dd5d4970766f262f38b94fa2405113"
	license "Apache-2.0"
	revision 1

	bottle do
	sha256 arm64_monterey: "e11d484b8dbeb19649b46ebadb1ff063e79a3fa7c3e1befc258c6fd28a4712a2"

mppf / libevent-timing-demo.c

Created September 29, 2021 17:17

libevent timeout across multiple event_add

	/*
	Program to demonstrate managing total timeout across many
	event_add calls.

	It accepts input on stdin for 2 seconds and demonstrates running
	for 2 seconds whether there is input or not.
	*/


	#include <errno.h>

mppf / gist:bc354d8c6277e999c27bbbca0c2a034f

Last active December 21, 2022 03:55

setting up git for access token on Ubuntu 20.04

	# Install gpg helper tools
	sudo apt-get install gnupg-agent pinentry-curses
	# Fix permission on the included git-credential-netrc
	sudo chmod a+x /usr/share/doc/git/contrib/credential/netrc/git-credential-netrc

	# create a GitHub access token for this
	# Go to Settings -> Developer Settings -> Personal access tokens -> Generate new token
	# We will save the token in an encrypted .netrc file below

	# create a gpg key (if you do not have one already on the machine)

mppf / dp-m2.chpl

Created May 17, 2020 11:34

variants on dp question

	// shows program modified to avoid array views in inner loops

	class AbstractKernel {
	// assumes x[xfirst, ..] and y[yfirst, ..] have shape 1..p
	proc kernel(x, xfirst: int, y: [?D] ?T, yfirst: int, p: int): T
	{
	return x[xfirst, 0]; // out of bounds (intentionally?)
	}
	}

mppf / spec.rst

Created September 23, 2019 19:31

	©2019 Cray Inc.

	Scope
	=====

	[Scope]

	Chapel is a new parallel programming language that is under development
	at Cray Inc. in the context of the DARPA High Productivity Computing
	Systems initiative.

mppf / OtherMSBRadix

Created August 21, 2018 21:13

	module OtherMSBRadix {

	use Shell;
	use Time;

	/* Sorting criterion has a method:
	(key:uint,done:bool) = criterion.keyBits(record, startbit)

	(cmp=-1,0,1,nsamebits) = criterion.prefixCompare(recordA, recordB)
	cmp=-1,0,1 = criterion.compare(recordA, recordB)

mppf / jt.chpl

Created August 10, 2017 14:52

Example of reading JSON with a Chapel class

	class Fighter {
	var subclass:string;
	var level:int;
	}

	var mem = openmem();
	var writer = mem.writer().write('{"subclass":"ninja", "level":3}');
	var reader = mem.reader();

	// This works

mppf / testOnBegin.chpl

Created July 24, 2017 16:24

	proc testOnBegin() {
	sync {
	on Locales[numLocales-1] do begin {
	writeln("HERE");
	}
	}
	}

	testOnBegin();

mppf / Bug.chpl

Last active July 21, 2017 17:18

showing bug with implicit module and same name inner module