Hermann-SW’s gists

Hermann-SW / amdgpu_temp

Created June 11, 2025 20:08

Table display of three temperatures for all installed AMD GPUs every second

	#!/bin/bash
	d=$(find /sys/class/drm/card?/device/unique_id \| wc --l)
	printf "%9s" "$(hostname)"

	for((c=0;c<d;++c))
	do
	printf "\|%s" "$(cat /sys/class/drm/card$c/device/unique_id)"
	done
	echo "\|"

Hermann-SW / demo_executions.md

Last active June 1, 2025 09:47

Fast discrete log() allows factoring RSA semiprimes easily

See comment below.

Hermann-SW / C60.Hamilton_Cycle.jscad

Created May 28, 2025 23:25

JSCAD script console.logs Mathematica command FindHamiltonianCycle[...], and displays its results in JSCAD

	"use strict"
	const jscad = require('@jscad/modeling')
	const { translate, rotate, scale:scale3d } = jscad.transforms
	const { vec3 } = jscad.maths
	const { colorize } = jscad.colors
	const { sphere, cylinder } = jscad.primitives
	const { add, length, subtract, scale } = jscad.maths.vec3

	const phi=(Math.sqrt(5)+1)/2;
	const build=[[0,1,3phi],[1,2+phi,2phi],[phi,2,2*phi+1]];

Hermann-SW / utility.jscad

Last active June 15, 2025 15:32

K_{3,3} embedded on a Möbius strip (with Bezier curve edges)

	"use strict";
	const jscad = require("@jscad/modeling");
	const { vec2, vec3} = jscad.maths;
	const { bezier} = jscad.curves;
	const { rotate, scale, translate } = jscad.transforms;
	const { cuboid, sphere, cylinder } = jscad.primitives;
	const { colorize } = jscad.colors;

	const r=40;
	const w=20;

Hermann-SW / measure.gp

Created May 17, 2025 23:03

script demonstrating alternative for isprimepower() with very big primes

	f1(N)={isprimepower(N,&r);return(r);}
	f2(N)={return(lift(gcd(Mod(2,N)^N-2,N)));}

	measure(f,N)={t0=getwalltime();f(N);t1=getwalltime();return(t1-t0);}

	print("runtimes in milliseconds, with N=nextprime(base)^expo\n");

	print("isprimepower(N,&r);return(r)");
	{
	printf(" \|");for(e=2,15,printf("%3d\|",e));print();

Hermann-SW / E.jscad

Created April 27, 2025 14:56

part to join with a 2GPU Riser card model

	"use strict"
	const jscad = require('@jscad/modeling')
	const { translate, rotateZ } = jscad.transforms
	const { cuboid, sphere } = jscad.primitives

	function main() {
	return rotateZ(Math.PI/2,[
	cuboid({size: [70,10,10]}),
	translate([0,50,0], cuboid({size: [70,10,10]})),
	translate([0,100,0], cuboid({size: [70,10,10]})),

Hermann-SW / nohup.out

Last active March 21, 2025 21:04

1d 03:04 log of prpll(M_52) on Instinct MI50 GPU with memory overclocked with 1200MHz (analysis in comments)

	m 1 1200
	c
	20250320 17:23:52 PRPLL 0.15-125-ga1349df starting
	20250320 17:23:52 config: -device 0 -workers 1 -block 1000 -use FAST_BARRIER -use BIGLIT=1 -use BCAST=1 -use NONTEMPORAL=1 -use UNROLL_W=2
	20250320 17:23:52 config: -prp 136279841
	20250320 17:23:52 device 0, OpenCL 3635.0 (HSA1.1,LC), unique id 'd64a58a17330f0ed'
	20250320 17:23:53 136279841 config: -DBCAST=1 -DBIGLIT=1 -DFAST_BARRIER=1 -DNONTEMPORAL=1 -DUNROLL_W=2
	20250320 17:23:53 136279841 FFT: 7.50M 512:15:512:0:0 (17.33 bpw)
	20250320 17:23:55 136279841 OK 0 on-load: blockSize 1000, 0000000000000003
	20250320 17:23:55 136279841 Proof of power 10 requires about 17.1GB of disk space

Hermann-SW / nohup.out

Last active April 26, 2025 18:42

Log of prpll on Instinct MI50 GPU with memory overclocked with 1200MHz on online list benchmark (analysis in comments)

	m 1 1200
	c
	20250320 02:23:44 PRPLL 0.15-125-ga1349df starting
	20250320 02:23:44 config: -device 0 -workers 1 -block 1000 -use FAST_BARRIER -use BIGLIT=1 -use BCAST=1 -use NONTEMPORAL=1 -use UNROLL_W=2
	20250320 02:23:44 config: -prp 77936867
	20250320 02:23:45 device 0, OpenCL 3635.0 (HSA1.1,LC), unique id 'd64a58a17330f0ed'
	20250320 02:23:45 77936867 config: -DBCAST=1 -DBIGLIT=1 -DFAST_BARRIER=1 -DNONTEMPORAL=1 -DUNROLL_W=2
	20250320 02:23:45 77936867 FFT: 4.50M 1K:9:256:1:0 (16.52 bpw)
	20250320 02:23:47 77936867 OK 0 on-load: blockSize 1000, 0000000000000003
	20250320 02:23:47 77936867 Proof of power 10 requires about 9.8GB of disk space

Hermann-SW / utility.jscad

Last active June 15, 2025 15:34

K_{3,3} embedded on a torus

	/jslint node/
	"use strict";
	const jscad = require("@jscad/modeling");
	const {vec2, vec3} = jscad.maths;
	const {colorize} = jscad.colors;
	const {cylinder, sphere, torus} = jscad.primitives;
	const {rotate, scale, translate} = jscad.transforms;

	let edgeCylinder = cylinder({height: 1, radius: 0.01}); // cached

Hermann-SW / M500000500001.gp

Created December 23, 2024 14:24

PARI/GP proof that Mersenne exponent 500000500001 does not give Mersenne prime (291.0g resident memory needed)

Hermann Stamm-Wilbrandt Hermann-SW