Goals: Add links that are reasonable and good explanations of how stuff works. No hype and no vendor content if possible. Practical first-hand accounts of models in prod eagerly sought.
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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# Hello, and welcome to makefile basics. | |
# | |
# You will learn why `make` is so great, and why, despite its "weird" syntax, | |
# it is actually a highly expressive, efficient, and powerful way to build | |
# programs. | |
# | |
# Once you're done here, go to | |
# http://www.gnu.org/software/make/manual/make.html | |
# to learn SOOOO much more. |
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library(googledrive) | |
# authenticate yourself | |
drive_auth() | |
gdoc_to_rmd <- function(drive_id, output, verbose = TRUE, overwrite = FALSE) { | |
# get the doc | |
doc <- drive_get(as_id(drive_id)) | |
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# autoloess.R: compute loess metaparameters automatically | |
# Kyle Gorman <gormanky@ohsu.edu> | |
aicc.loess <- function(fit) { | |
# compute AIC_C for a LOESS fit, from: | |
# | |
# Hurvich, C.M., Simonoff, J.S., and Tsai, C. L. 1998. Smoothing | |
# parameter selection in nonparametric regression using an improved | |
# Akaike Information Criterion. Journal of the Royal Statistical | |
# Society B 60: 271–293. |
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--- | |
title: "Tweet thread" | |
author: "Elio Campitelli" | |
output: github_document | |
--- | |
```{r} | |
knitr::opts_chunk$set(dev = "png", | |
tweet_this = TRUE) |
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# This example demonstrates running furrr code distributed on 2 AWS instances ("nodes"). | |
# The instances have already been created. | |
library(future) | |
library(furrr) | |
# Two t2.micro AWS instances | |
# Created from http://www.louisaslett.com/RStudio_AMI/ | |
public_ip <- c("34.205.155.182", "34.201.26.217") |
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If, like me, your are booting with UEFI (because having a triple boot ubuntu-windows-mac or because UEFI is the most modern type of bootloader and successor of EFI :p), you have to sign the proprietary modules each time they are recompiled (or upgrade kernel version) so that they are allowed to be loaded in the kernel. | |
1) Step one, create a self-signed certificate to sign nvidia driver: | |
sudo openssl req -new -x509 -newkey rsa:2048 -keyout UEFI.key -outform DER -out UEFI.der -nodes -days 36500 -subj "/CN=rambou_nvidia/" | |
2) step two load and store certificate in a supplementary key database MOC | |
sudo mokutil --import UEFI.der | |
3) step three reboot your system | |
At this step after reboot you will be prompted to select your certificate to import in in key database. If you have inserted a password at certificate creation you'll be prompted to insert it. If you are not prompted, you may have to enter the BIOS by using function keys at boot time. |
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import numpy | |
from scipy.ndimage.interpolation import map_coordinates | |
from scipy.ndimage.filters import gaussian_filter | |
def elastic_transform(image, alpha, sigma, random_state=None): | |
"""Elastic deformation of images as described in [Simard2003]_. | |
.. [Simard2003] Simard, Steinkraus and Platt, "Best Practices for | |
Convolutional Neural Networks applied to Visual Document Analysis", in |
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library("shiny") | |
library("tidyverse") | |
library("rnaturalearthdata") | |
library("sf") | |
# Using Africa instead of whole world as countries110 contains | |
# 3 invalid geometries. Also, too many examples use the USA everytime | |
africa_sf <- countries110 %>% | |
st_as_sf() %>% | |
st_transform(4326) %>% |
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