Ali Farazdaghi alifarazz

On an Intel i7-13620H, running Linux 6.12.52-lts and gcc 15.2.1 without sanitizers:

$ ./umonitor-umwait-semaphore 16 3
Semaphore initialized with count = 3.
Spawning 16 worker threads...

Main thread: Releasing an additional permit after some time.

All workers finished.

How to compile:
- $ g++ -DBIG_INPUT -Ofast -mtune=native -march=native -pipe -funroll-loops -Wall -Wextra -Wcast-align -Wchar-subscripts -Wshadow -Wunused dijkstra.cc -o dijkstra -flto
  or
- $ clang++ -stdlib=libc++ -DBIG_INPUT -Ofast -mtune=native -march=native -funroll-loops -Wall -Wextra -Wcast-align -Wchar-subscripts -Wshadow -Wunused dijkstra.cc -o dijkstra -flto

Results on a Intel Core i7-13620H, compiled with gcc, with 1024x1024 input:

$ numactl --physcpubind=2 hyperfine -N -i -w 30 -r 100 './dijkstra'
Benchmark 1: ./dijkstra

Time (mean ± σ): 3.2 ms ± 0.0 ms [User: 2.9 ms, System: 0.3 ms]

CMake All Variable Dump

Put this wherever you'd want to dump the variables from.

message("=============BEGIN VARIABLE DUMP ========================")
get_cmake_property(_variableNames VARIABLES)
foreach (_variableName ${_variableNames})
    message("${_variableName}=${${_variableName}}")
endforeach()
message("=============END VARIABLE DUMP ==========================")

	#!/usr/bin/env bash

	# Get path to current script,
	if [ -n "${SLURM_JOB_ID:-}" ] ; then
	SCRIPT_PATH="$(scontrol show job "$SLURM_JOB_ID" \| awk -F= '/Command=/{print $2}')"
	else
	SCRIPT_PATH="$(readlink -f "${BASH_SOURCE[0]}")"
	fi

	SCRIPT_DIR="$(dirname "${SCRIPT_PATH}")"

	# in $HOME/.config/tmux/tmux.conf
	# set-option -g default-shell "path to fish"
	# I copied most of this off someone's blog.

	# # remap prefix from 'C-b' to 'C-a'
	# unbind C-b
	# set-option -g prefix C-a
	# bind-key C-a send-prefix

	# split panes using \| and -

	#!/usr/bin/env bash
	# SPDX-License-Identifier: AGPL-3.0-or-later

	######### NOTE: HOW TO USE #########################################
	# $ bash sync-with-remote.bash <path to .(git)ignore file> <local path to watch for>


	set -euEo pipefail
	# set -x # show every command being executed, used for debug

	// g++ -std=c++20 cpu_burn.cc -o cpu_burn

	#include <bits/stdc++.h>

	constexpr size_t maxn = 192;
	constexpr int iter = 1024 * 1024;

	std::array<std::jthread, maxn> threads;
	std::array<unsigned int, (1024ull * 1024 * 512)> data;

	/// SPDX-License-Identifier: GPL-2.0-or-later
	#define _GNU_SOURCE

	#include <linux/prctl.h> /* Definition of PR_* constants */
	#include <sys/prctl.h>

	#include <sys/syscall.h> /* for __NR_write */
	#include <ucontext.h> /* REG_RBP, REG_RSP */
	#include <unistd.h> /* for write(2) */

	// g++ -O3 -Wall -Wextra -Wconversion -Wshadow -Wpedantic -std=c++20 -march=alderlake umwait.cc -o umwait.elf
	// ./umwait.elf or ./umwait.elf w
	#include <atomic>
	#include <iostream>
	#include <latch>
	#include <thread>

	#include <immintrin.h>
	#include <x86intrin.h>

	#include <cstdio>

	int f(int ap, float bp) {
	*ap = 1;
	*bp = 2.0f;
	return *ap;
	}

	int main() {
	int a = 0; float b = 0.0f;