Patrick Hammer pathammer

SW Engineer at Amazon Robotics

pathammer / trim_video.sh

Last active October 12, 2018 22:48

Trim a mp4 video to certain timecodes. Got from https://stackoverflow.com/a/42827058

ffmpeg -i movie.mp4 -ss 00:00:03 -t 00:00:08 -async 1 cut.mp4

pathammer / test_rt_wakeup_latency.sh

Last active October 19, 2018 17:18

cyclictest measures timed task wakeup latency

	#!/bin/bash
	cyclictest -n -p 99 -h 500 -q

pathammer / cache_test.sh

Last active October 26, 2018 22:37

Cache benchmark loop - https://homepages.cwi.nl/~manegold/Calibrator/

	#!/bin/bash
	calibrator 3392 8M outputfile

pathammer / test_rt_disk_io.sh

Last active October 19, 2018 17:51

Real Time Disk IO Benchmark

	#!/bin/bash
	echo 1 > /proc/sys/vm/drop_caches
	bonnie -y -s 2000
	# https://en.wikipedia.org/wiki/Bonnie%2B%2B
	# apt install bonnie++

pathammer / make linux kernel

Last active October 31, 2018 21:33

	make -j `getconf _NPROCESSORS_ONLN` deb-pkg LOCALVERSION=-custom
	mkdir -p modules
	make INSTALL_MOD_PATH=modules -j `getconf _NPROCESSORS_ONLN` modules_install

pathammer / run_script_in_vagrant

Created November 5, 2018 20:58

Run a shell script inside vagrant VM

vagrant ssh -c "cd /vagrant; bash -s - ARGUMENT < shell_script.sh "

pathammer / ap_start.bat

Created January 19, 2019 00:02

Windows WiFi Access Point Startup

	netsh wlan set hostednetwork mode=allow ssid=windowswifi key=supersecretpw keyUsage=persistent
	netsh wlan start hostednetwork
	timeout 10

pathammer / in.clj

Created October 24, 2019 20:55

Parse list of pairs of numbers from STDIN, useful for parsing hackerrank.com quiz input

	(def pairs (for [_ (range numPairs)]
	(map #(Integer/parseInt %) (re-seq #"[-\d.]+" (read-line)))))

pathammer / tmux_pair.md

Last active May 26, 2020 17:57

tmux pair programming / collaboration

Live collaboration with tmux

user1

tmux -S /tmp/collab
chmod 777 /tmp/collab

user2