This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).
Matrix multiplication is a mathematical operation that defines the product of
| (* The Mandelbrot set. | |
| Compile with: | |
| ocamlbuild mandelbrot.native | |
| Example usage: | |
| ./mandelbrot.native --xmin 0.27085 --xmax 0.27100 --ymin 0.004640 --ymax 0.004810 --xres 1000 --maxiter 1024 --file pic.ppm |
| #!/usr/bin/env gnuplot | |
| set terminal svg size 800,600 # svg dumb png / mousing | |
| # set termoption enhanced # for enchanced text mode, substituting e.g. x^2 as x squared super script | |
| #set output "testing-gnuplot.svg" | |
| set title "Dicks in a bag" | |
| set macros # let's you expand variables with @ during preprocessing | |
| # set size ratio 0.5 |
| Table of names of MemoryManagerMXBean and MemoryPoolMXBean instances under | |
| different GC algorithms in Oracle HotSpot VM. Memory managers list the pools | |
| they manage in square brackets; memory pools show their maximum sizes for -Xmx200M setting. | |
| $ java -version | |
| java version "1.6.0_24" | |
| Java(TM) SE Runtime Environment (build 1.6.0_24-b07) | |
| Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode) | |
| SerialGC: |
| -- See article here: http://daringfireball.net/2007/07/simple_inbox_sweeper | |
| -- The following should be one long line: | |
| set _description to "All unflagged, read messages in each IMAP account | |
| inbox will be moved to the “Archive” mailbox corresponding to that | |
| account. This action is not undoable." | |
| tell application "Mail" | |
| display alert "Archive read messages from IMAP inboxes?" buttons ¬ | |
| {"Cancel", "Archive"} cancel button 1 message _description |
