manuelmorales

# Read the CMDLINE
sudo ./rkflashtool r 0x0000 0x2000 > cmdline.txt

# RESULT:
# PARMWFIRMWARE_VER:4.0.4
# MACHINE_MODEL:MID
# MACHINE_ID:007
# MANUFACTURER:RK30SDK
# MAGIC: 0x5041524B
# ATAG: 0x60000800

brandonb927

#!/bin/sh

###
# SOME COMMANDS WILL NOT WORK ON macOS (Sierra or newer)
# For Sierra or newer, see https://github.com/mathiasbynens/dotfiles/blob/master/.macos
###

# Alot of these configs have been taken from the various places
# on the web, most from here
# https://github.com/mathiasbynens/dotfiles/blob/5b3c8418ed42d93af2e647dc9d122f25cc034871/.osx

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

atr000

#Constants from sys/resources.h
#I/O type
#IOPOL_TYPE_DISK 0

#scope
#IOPOL_SCOPE_PROCESS   0
#IOPOL_SCOPE_THREAD    1

#I/O Priority
#IOPOL_DEFAULT   0