More multi-core improvements

2011-11-02T10:48:00.000Z

More multi-core improvements: Matthew Dillon wrote up an explanation of how performance on systems with a lot of CPU cores has been significantly improved – up to 300%! (He says 200%, but I think he’s treating it as a percentage of a whole rather than percent changed.) Apparently finally getting rid of lock contention is the trick.

Test 2

2011-11-01T11:10:00.000Z

Linux performance improvements: Two years ago I wrote an article presenting some Linux performance improvements. These performance improvements are still valid, but it is time to talk about some new improvements available. As I am using Debian now, I will focus on that distribution, but you should be able to easily implement these things on other distributions too. Some of these improvements are

throw AlertException::getInstance();

2011-08-27T11:20:00.000+01:00

Someone recently recommended me disruptor. It's Java but there is a port to C++ called distruptor-cpp. The guys use several boost libraries but the code looks like Java. This "pattern" caught by eyes: 159 throw AlertException::getInstance(); They obviously optimize a memory allocation: 47 /** Singleton pattern to avoid memory allocation in an exception */ 48 static AlertException

BIND 10

2011-02-11T16:56:00.000Z

Holy shit, BIND 10 uses boost and python!

bin/44188: gcov sucks

2010-12-08T09:47:00.000Z

Nice bug report: >Number: 44188 >Category: bin >Synopsis: gcov sucks >Confidential: no >Severity: critical >Priority: low >Responsible: bin-bug-people >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Fri Dec 03 08:00:00 +0000 2010 >Originator: David A. Holland >Release: NetBSD 5.99.41 (20101130) >Organization: >

use autodie;

2010-10-25T09:52:00.000+01:00

I rarely use perl but I'm sure I'll need this feature next time I dive into perl ;-) -----Original Message----- From: owner-tech@openbsd.org [mailto:owner-tech@openbsd.org] On Behalf Of Marc Espie Sent: 04 October 2010 13:24 To: tech@openbsd.org Subject: new perl if you run into "fishy" perl scripts, newer perl includes (as standard) autodie. a simple use autodie; and at least, stupid stuff

I've been wiki'd

2009-11-04T12:46:00.001Z

My name appears in this article.

LuaJIT 2.0.0-beta1

2009-11-03T08:31:00.003Z

New version of LuaJIT is very impressive. Take a deep breath ... Mike Pall wrote: > As I've already said in a reddit comment: > > Heh, it beats Intel Fortran on two numeric benchmarks (mandelbrot > and spectralnorm). > > Only the hand-vectorized stuff in C and C++ is faster. Guess I > need to add auto-vectorization. Well, maybe next week ... > > --Mike More technical details are

mmap'ing to address 0x0

2009-10-10T11:05:00.002+01:00

Date: Fri, 09 Oct 2009 22:01:07 -0600 From: Theo de Raadt To: Luis Useche cc: misc Subject: Re: mmap'ing to address 0x0

Hello World from Lua

2009-10-07T22:22:00.001+01:00

The lua program below prints 'Hello World from Lua'. Enjoy! _={_=_G }for--[[--]]__ in(next),_["_"]do (_)[_]=(__)_[#_[_]]

pkgsrc/lang/gcc44

2009-09-18T16:41:00.002+01:00

We've been waiting for update for a long time, the previous version in pkgsrc is lang/gcc34 (wip/gcc42 doesn't count ;-) Module Name: pkgsrc Committed By: dmcmahill Date: Fri Sep 18 11:24:50 UTC 2009 Update of /cvsroot/pkgsrc/lang/gcc44 In directory ivanova.netbsd.org:/tmp/cvs-serv5730 Log Message: Import gcc-4.4.1 as lang/gcc44. This is the latest branch of gcc. Of particular

Multiline comments in shell with here-document

2009-09-16T10:05:00.003+01:00

Did you know that you can use multiple lines in shell with the ":" command and a here-document? The following example is inspired by two scripts from SHELLdorado: : <

ZFS in FreeBSD

2009-09-15T19:29:00.000+01:00

Author: pjd Date: Tue Sep 15 11:34:53 2009 New Revision: 197218 URL: http://svn.freebsd.org/changeset/base/197218

Boost bugs

2009-09-13T21:58:00.002+01:00

I spent few hours today and yesterday closing my bugs. #2768 [any] Unique type_info #2749 [any] multi method for boost::any and modified boost::any to fit multi method #2748 [any] implement reset for direct constructing (adapt to noncopyable) #2295 Inconsistent behavior when using 64 bit integer types #754 boost::any - typeid comparison across shared boundaries #922 Lexical cast and wide

Tetris to the rescue!

2009-09-12T01:00:00.002+01:00

I never play games when I recover a computer but apparently some people do: From apb@cequrux.com Mon Sep 7 20:50:54 2009 Return-Path: Received: from mail.netbsd.org (mail.netbsd.org [204.152.190.11]) by www.NetBSD.org (Postfix) with ESMTP id E6F8B63BCFB for ; Mon, 7 Sep 2009 20:50:54 +0000 (UTC) Message-Id: <20090907205043.3DDA0100AA4C@apb-laptoy.apb.alt.za> Date: Mon, 7 Sep 2009 20:50:

"The next generation of C++" site

2009-08-16T10:45:00.001+01:00

http://cpp-next.com/

United States Patent 6711562

2009-03-15T00:55:00.004Z

I came across this patent when searching for a cache-friendly associative containers. http://www.freepatentsonline.com/6711562.html UPDATE: I found what I was searching for: http://idlebox.net/2007/stx-btree/stx-btree-0.8.3/doxygen-html/speedtest.html

Linix built (mostly) without GCC

2008-03-24T02:28:00.005Z

Linux built (mostly) without GCC Disclaimer ========= This is work in progress. Purpose ======= To build the whole LFS 6.3 (http://www.linuxfromscratch.org/lfs/view/stable/) system without installing gcc. Only glibc and the kernel will be built with gcc. All the rest will be built with Sun Studio 12 compiler. Packaging system used is pkgsrc (http://www.pkgsrc.org) because it has a good

ScopeExit Review Announcement

2007-08-03T11:58:00.000+01:00

http://thread.gmane.org/gmane.comp.lib.boost.devel/163149 Alexander Nasonov's ScopeExit submission will be formally reviewed August 13 - August 22. The current submission has been uploaded to http://boost-consulting.com/vault/index.php?action=downloadfile&filename=scope_exit-0.04.tar.gz&directory=& It's also available at http://tinyurl.com/2z6qg2 Online documentation is here http://

Redundant firewalls with OpenBSD, CARP and pfsync

2007-06-19T14:24:00.000+01:00

I finally found a good description of redundant network configuration here. Too bad I can't apply it in practice.

Smashing The Kernel Stack For Fun And Profit

2007-05-30T11:53:00.000+01:00

After reading the great Firewall Spotting with broken CRC I continued reading Phrack #60. Surprisenly, there is another OpenBSD article Smashing The Kernel Stack For Fun And Profit. I enjoyed it even more.

Interesting OpenBSD commits

2007-05-30T09:44:00.000+01:00

http://www.undeadly.org/cgi?action=article&sid=20070528213858 Especially this comment: > Check protocol (TCP/UDP/ICMP/ICMP6) checksums of all incoming packets, > and drop packets with invalid checksums. Without such a check, pf would > return RST/ICMP errors even for packets with invalid checksums, which > could be used to detect the presence of the firewall, reported by > "Ed White" in http://

Switching to modular-xorg and xfce4

2007-05-02T10:05:00.000+01:00

I changed X11_TYPE to "modular" and added the following packages to my pkgchk.conf file: x11/modular-xorg-server x11/xf86-input-keyboard x11/xf86-input-mouse x11/xf86-video-ati x11/xinit x11/xterm x11/xauth x11/iceauth meta-pkgs/modular-xorg-fonts wm/ratpoison All packages builds fine under FreeBSD, OpenBSD and Linux with a simple command: pkg_chk -u -a meta-pkgs/xfce4 builds without problems

[boost] Announce: scope_exit version 0.03

2007-04-20T13:05:00.000+01:00

Version 0.03 is available for download at http://tinyurl.com/yps8zs You can read documentation online: http://194.6.223.221/~nasonov/scope_exit-0.03/libs/scope_exit/doc/html/ What's new in this version: - Based on simpler 0.01 interface but with a better implementation - Found a problem on MSVC. It doesn't link when a block in a header file is included by more than one cpp file. I tried __

Interesting Google Summer of Code 2007 projects

2007-04-12T10:12:00.000+01:00

Boost: Boost 'Big Integer' proposal Boost.Extension and Reflection FastCGi and SCGI-compatible CGI library NetBSD: Improving the pkgsrc build system GCC: Better Uninitialized Warnings Speeding up GCC for fun and profit New static scheduling heuristic for GCC Haskell: Shared Libraries for GHC Extending GuiHaskell: An IDE for Haskell Hackers PostgreSQL: Column-level privilege implementation for

I thought I found a bug in OpenBSD ...

2007-03-15T15:55:00.000Z

... but someone else found that bug a bit earlier. I spent a funny evening tracking it down to the same lines as in the fix.

How to run print/acroread7 on FreeBSD 6.2

2007-02-25T18:35:00.000Z

This instruction explains how to install and run print/acroread7 on FreeBSD 6.2 using pkgsrc. Before you start, please check that it's still broken. I hope it'll be fixed soon after my post and you would only need to follow configuration of /compat/linux. Go to emulators/suse100_base and suppress an execution of /dev/MAKEDEV - this file doesn't exist (/dev is devfs mount point on FreeBSD 6.2) %

[boost] Request for review: scope_exit

2006-11-27T07:49:00.000Z

Here is my post.

Quote generator

2006-11-23T08:27:00.000Z

I'm a happy user of mutt but I always wanted dynamically generated signature with a cool content. And I finally did it! This simple script retrieves a random quote from www.quotedb.com, formats it and finally prints most interesting part of itself: #!/bin/sh cat ~/.signature /usr/pkg/bin/curl -L http://tinyurl.com/veusy | sed -e 's/^document\.write(.//' -e 's/.);$//' -e '

How to remember arguments order in ln -s command

2006-11-20T15:35:00.000Z

I couldn't remember for a long time what should go first after ln -s. It came to me when I learnt about !$ (last argument of last executed command). $ touch x $ ln -s x y $ file !$ file y y: symbolic link to x

Writing A Lisp Interpreter In Haskell

2006-11-13T14:12:00.000Z

I'm reading Writing A Lisp Interpreter In Haskell right now. The author refers to Boost Spirit to introduce Haskell's Parsec library. Very interesting reading.

Handle mailto: links with Gmail

2006-11-11T15:03:00.000Z

Very interesting greasemonkey script: http://blog.monstuff.com/archives/000238.html

CLFS 1.0.0 x86 report: Compile GNU/Linux from FreeBSD

2006-09-30T10:03:00.000+01:00

I was able to build a temporary system on my Pentium M notebook but I couldn't boot it :( Few words about my system. It runs recently compiled FreeBSD 6.2 PRERELEASE. For package management I use ports and pkgsrc. Some tools required to build CLFS are either missing in the base FreeBSD system or don't understand an option. In these cases, I either appended /usr/pkg/bin to the $PATH or provided

[boost] [lexical_cast] optimization commited to HEAD

2006-08-26T22:39:00.000+01:00

I just posted it to boost-devel list: http://lists.boost.org/Archives/boost/2006/08/109590.php Hello, I recently commited the version 1.26 of lexical_cast.hpp that optimizes many combinations of types. How it works: The lexical_cast reserves a local buffer for bool, char, wchar_t and other integral types. Then it puts a string representation of a source to the buffer. Currently, all such

Blogger.com doesn't like C++ template code

2006-08-21T13:50:00.000+01:00

I found out that most code snipsets of my Overload articles posted here are not correct. For example, template struct Mixin : T { ~Mixin(); }; but it should be template struct Mixin : T { ~Mixin(); }; I'll try to correct it.

GWT - Google Web Toolkit

2006-07-03T11:24:00.000+01:00

http://code.google.com/webtoolkit/overview.html They use Java for development and GWT compiler to convert Java to JavaScript and HTML.

The library we've been waiting for a long time

2006-07-02T11:53:00.000+01:00

----- Forwarded message from Jeff Garland ----- Date: Sat, 01 Jul 2006 18:03:36 -0700 To: boost@lists.boost.org From: Jeff Garland Subject: [boost] Interest in super string class? I've been working on a little project where I've had to doing lots of string processing, so I decided to put together a string type that wraps up boost.regex and boost.string_algo into a string type. I also

A Little Detail

2006-06-20T18:24:00.000+01:00

A Little DetailAlexander NasonovSome time ago I wrote a simple mixin class template. A week later I found a little problem with it. Although I found a solution in a second I decided to analyse it more deeply. It’s worth analysing further because it concerns some fundamental features of C++.Here is the problematic code:template struct Mixin : T { ~Mixin(); };I guess I

Better Encapsulation for the Curiously Recurring Template Pattern

2006-06-20T18:03:00.000+01:00

Overload 70: December 2005Better Encapsulation for the Curiously Recurring Template PatternAlexander NasonovC++ has a long, outstanding history of tricks and idioms. One of the oldest is the curiously recurring template pattern (CRTP) identified by James Coplien in 1995 [Coplien]. Since then, CRTP has been popularized and is used in many libraries, particularly in Boost [Boost].

Google Summer of code

2006-04-30T10:06:00.000+01:00

I've just completed http://code.google.com/soc/mentor_step1.html to become a mentor of Boost.

Nothing special