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Archive What If? Blag Store About A webcomic of romance, sarcasm, math, and language. xkcd updates every Monday, Wednesday, and Friday. Wasted Time |< < Prev Random Next > >| |< < Prev Random Next > >| Permanent link to this comic: http://xkcd.com/1502/ Image URL (for hotlinking/embedding): http://imgs.xkcd.com/comics/wasted_time.png http://code.google.com/p/chromium/issues/detail?id=108489 Might be MIME dependent. Search comic titles and transcripts: RSS Feed - Atom Feed Comics I enjoy: Three Word Phrase , Oglaf (nsfw), SMBC , Dinosaur Comics , A Softer World , Buttersafe , Perry Bible Fellowship , Questionable Content , Buttercup Festival , Homestuck Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may...

This is a dumb hack, we should only have one or the other from the the template context, so only one of the following will be rendered. ...

header-start Minimalist Object Storage. visit github Contact Team header-end main-section-end main-section alabaster-end business-talking-end main-section contribution-end main-section joinus ...

splice() is a syscall on Linux. It transfers data from a pipe to another within kernel space. Optionally, either the source or the destination can be a descriptor or a socket, but at least one pipe is needed. As splice() avoids copying data from and to the userspace, it is more efficient than a read()/write() combo. A typical snippet which reads data from the network socket s and writes it to the file descriptor fd , looks like this: char buffer[4096]; ssize_t bytes; for (;;) { bytes = read(s, buffer, sizeof(buffer)); if (bytes == 0) break; write(fd, buffer, bytes); } You can rewrite that using splice(): int pfd[2]; ssize_t bytes; pipe(pfd); for (;;) { bytes = splice(s, NULL, pfd[1], NULL, sizeof(buffer), SPLICE_F_MOVE); if (bytes == 0) break; splice(pfd[0], NULL, fd, NULL, bytes, SPLICE_F_MOVE); } So this snippet is the reverse function of sendfile() . Howeve...

Facebook logo Email or Phone Password Keep me logged in Forgot your password? Sign Up By Peter Vajgel on Thursday, April 30, 2009 at 2:27pm The Photos application is one of Facebook’s most popular features. Up to date, users have uploaded over 15 billion photos which makes Facebook the biggest photo sharing website. For each uploaded photo, Facebook generates and stores four images of different sizes, which translates to a total of 60 billion images and 1.5PB of storage. The current growth rate is 220 million new photos per week, which translates to 25TB of additional storage consumed weekly. At the peak there are 550,000 images served per second. These numbers pose a significant challenge for the Facebook photo storage infrastructure. The old photo infrastructure consisted of several tiers: Upload tier receives users’ photo uploads, scales the original images and saves them on the NFS...

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Home Free eBook Contact About Start Here by Lakshmanan Ganapathy on July 17, 2013 Tweet What are kernel modules? Kernel modules are piece of code, that can be loaded and unloaded from kernel on demand. Kernel modules offers an easy way to extend the functionality of the base kernel without having to rebuild or recompile the kernel again. Most of the drivers are implemented as a Linux kernel modules. When those drivers are not needed, we can unload only that specific driver, which will reduce the kernel image size. The kernel modules will have a .ko extension. On a normal linux system, the kernel modules will reside inside /lib/modules/<kernel_version>/kernel/ directory. Earlier we discussed how to compile a kernel from the source . This tutorial explains how to write a Kernel module using a simple Hello World example. lsmod command will list modules that are a...

This is a dumb hack, we should only have one or the other from the the template context, so only one of the following will be rendered. ...

<![endif] Twitter Search query Search Twitter Remove Verified account @ Suggested users Verified account @ Verified account @ Language: English Bahasa Indonesia Bahasa Melayu Čeština Dansk Deutsch English UK Español Filipino Français Italiano Magyar Nederlands Norsk Polski Português Română Suomi Svenska Tiếng Việt Türkçe Русский Українська мова עִבְרִית العربية فارسی हिन्दी বাংলা ภาษาไทย 한국어 日本語 简体中文 繁體中文 Have an account? Log in New to Twitter? Join Today » Log in Phone, email or username Password Log in Remember me Forgot password? Already using Twitter via text message? Follow Following Unfollow Blocked Unblock Pending Cancel Oleg ‏ @ oleg_dbooks Mar 20 : skysql olegdb & hadoop, sittin' in ...

%%%TOP_BAR%%% man7.org > Linux > man-pages Linux/UNIX system programming training %%%PAGE_START%%% NAME | SYNOPSIS | DESCRIPTION | VERSIONS | NOTES | BUGS | EXAMPLE | SEE ALSO | COLOPHON NETLINK(7) Linux Programmer's Manual NETLINK(7) top netlink - communication between kernel and user space (AF_NETLINK) top #include <asm/types.h> #include <sys/socket.h> #include <linux/netlink.h> netlink_socket = socket(AF_NETLINK, socket_type , netlink_family ); top Netlink is used to transfer information between kernel and user-space processes. It consists of a standard sockets-based interface for user space processes and an internal kernel API for kernel modules. The internal kernel interface is not documented in this manual page. There is also an obsolete netlink interface via netlink char...

Free Electrons • source navigation • diff markup • identifier search • freetext search • Version: 2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 Linux include linux fs.h 1 #ifndef _LINUX_FS_H 2 #define _LINUX_FS_H 3 4 5 #include <linux/linkage.h> 6 #include <linux/wait.h> 7 #include <linux/kdev_t.h> 8 #include <linux/dcache.h> 9 #include <linux/path.h> 10 #include <linux/stat.h> 11 #include <linux/cache.h> 12 #include <linux/list.h> 13 #include <linux/list_lru.h> 14 #include <linux/llist.h> 15 #include <linux/radix-tree.h> 16 #include <linux/rbtree.h> 17 #include <linux/init.h> 18 #include <linux/pid.h> 19 #include <linux/bug.h> 20 #include <linux/mutex.h> 21 #include <linux/rwsem.h> 22 #include <linux/capability.h> 23 #include <linux/semaphore.h> 24 #include <linux/fiemap.h> 25 #include <linux/...

Free Electrons • source navigation • diff markup • identifier search • freetext search • Version: 2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 Linux include linux fs.h 1 #ifndef _LINUX_FS_H 2 #define _LINUX_FS_H 3 4 5 #include <linux/linkage.h> 6 #include <linux/wait.h> 7 #include <linux/kdev_t.h> 8 #include <linux/dcache.h> 9 #include <linux/path.h> 10 #include <linux/stat.h> 11 #include <linux/cache.h> 12 #include <linux/list.h> 13 #include <linux/list_lru.h> 14 #include <linux/llist.h> 15 #include <linux/radix-tree.h> 16 #include <linux/rbtree.h> 17 #include <linux/init.h> 18 #include <linux/pid.h> 19 #include <linux/bug.h> 20 #include <linux/mutex.h> 21 #include <linux/rwsem.h> 22 #include <linux/capability.h> 23 #include <linux/semaphore.h> 24 #include <linux/fiemap.h> 25 #include <linux/...

Skip to content Sign up Sign in This repository Explore Features Enterprise Blog Watch 1 Star 7 Fork 2 dpw / skinny-mutex /.container /.repohead Code Issues Pull requests Pulse Graphs HTTPS Subversion You can clone with HTTPS or Subversion . Download ZIP /.repository-sidebar Low-memory-footprint mutexes for pthreads 24 commits 2 branches 0 releases 2 contributors C 100% C branch: master Switch branches/tags Branches Tags master transfer Nothing to show Nothing to show skinny-mutex / Github fixed the README precedence issue … I should learn to be more patient. latest commit 467eb71d02 dpw authored Nov 20, 2013 Failed to load latest commit informatio...

Marek's totally not insane idea of the day 11 September 2012 I needed a queue implementation written in C for one of my ever-experimental projects. The complex part was to make it thread-safe - it was going to be used for exchanging data between threads. Usually, I'd just take the doubly linked list implementation from the linux kernel 1 , wrap it in a mutex and quickly move on to another challenge. This time though, I decided to make sure the queue is as efficient as possible. The mutex solution has at least few deficiencies: A queue is a much simpler data structure than way than a list. It has also smaller memory footprint - a FIFO queue requires a single pointer per element ( next ), while doubly linked list requires two ( prev and next ). Mutexes are relatively heavy. There is a better way. My CPU has CMPXCHG instruction for a reason - to enable lock-free al...

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This is a dumb hack, we should only have one or the other from the the template context, so only one of the following will be rendered. ...

Sign up for a GitHub account Sign in All Gists qpfiffer / gist:34c9489af43059593219 Created March 21, 2015 Code Revisions 1 /.sunken-menu-group /.sunken-menu-contents Embed HTTPS SSH You can clone with HTTPS or SSH . Download Gist /.only-with-full-nav View gist:34c9489af43059593219 gistfile1.txt Raw File suppressed. Click to show. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 <html> <body> xXx SCREAM _include.html xXx <li>This is a test. a</li> <li>This is a test. b</li> <li>This is a test. c</li> <li>This is a test. 1</li> <li>This is a test. 2</li> <li>This is a test. 3</li> <span>This is the real TrIcKy 1</span> <p>This is a regular string: This is a test....

Sign up for a GitHub account Sign in All Gists qpfiffer / gist:95e4f1b609bcffaa5c69 Created March 21, 2015 Code Revisions 1 /.sunken-menu-group /.sunken-menu-contents Embed HTTPS SSH You can clone with HTTPS or SSH . Download Gist /.only-with-full-nav View gist:95e4f1b609bcffaa5c69 gistfile1.txt Raw File suppressed. Click to show. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 <html> <body> xXx SCREAM _include.html xXx <li>This is a test. a</li> xXx BBL xXx <span>This is the re...

Adam Drake About Sat 25 January 2014 by Adam Drake As I was browsing the web and catching up on some sites I visit periodically, I found a cool article from Tom Hayden about using Amazon Elastic Map Reduce (EMR) and mrjob in order to compute some statistics on win/loss ratios for chess games he downloaded from the millionbase archive , and generally have fun with EMR. Since the data volume was only about 1.75GB containing around 2 million chess games, I was skeptical of using Hadoop for the task, but I can understand his goal of learning and having fun with mrjob and EMR. Since the problem is basically just to look at the result lines of each file and aggregate the different results, it seems ideally suited to stream processing with shell commands. I tried this out, and for the same amount of data I was able to use my laptop to get the results in about 12...

BEGIN HEADER Partners Support Community Ubuntu.com Ubuntu Wiki Search: Immutable Page Info Attachments More Actions: Raw Text Print View Delete Cache ------------------------ Check Spelling Like Pages Local Site Map ------------------------ Rename Page Copy Page Delete Page ------------------------ Subscribe User ------------------------ Remove Spam Revert to this revision Package Pages Sync Pages ------------------------ Load Save SlideShow Ubuntu Wiki Login Help PowerPCDownloads END HEADER Contents Long-term support releases 14.04 Trusty Tahr 12.04 Precise Pangolin 10.04 Lucid Lynx LTS Other releases Daily build of the current Ubuntu development release Old Releases Mirrors Since 7.04 Ubuntu, PowerPC downloads of Ubuntu are not available on all Ubuntu mirrors. Below you'll find links to the ISOs on ...

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Free Electrons • source navigation • diff markup • identifier search • freetext search • Version: 2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 Linux fs xfs xfs_mru_cache.c 1 /* 2 * Copyright (c) 2006-2007 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * alo...