The Message Passing Interface (MPI) is a computer communications protocol. It is a de facto standard for communication among the nodes running a parallel program on a distributed memory system. MPI implementations consist of a library of routines that can be called from Fortran, C, C++ and Ada programs. The advantage of MPI over older message passing libraries is that it is both portable (because MPI has been implemented for almost every distributed memory architecture) and fast (because each implementation is optimized for the hardware on which it runs).

Example program

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Here is "Hello World" in MPI. Actually we send a "hello" message to each processor, manipulate it trivially, send the results back to the main processor, and print the messages out.

/* test of MPI */ #include #include #include int main(int argc, char *argv^*) { char idstr^*; char buff^*; int numprocs; int myid; int i; MPI_Status stat; MPI_Init(&argc,&argv); MPI_Comm_size(MPI_COMM_WORLD,&numprocs); MPI_Comm_rank(MPI_COMM_WORLD,&myid); if(myid == 0) { printf("We have %d processors\n", numprocs); for(i=1;iMore on [ Message Passing Interface ]

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Gartner Revises Server Share Numbers
Thu, 03 Jul 2008 18:43:24 -0400
Gartner revised its first quarter numbers and found that IBM actually beat out Hewlett-Packard in server revenue....
Who Is Running The Most Secure Browser?
Thu, 03 Jul 2008 14:03:13 -0400
Many users are undoubtedly not updating their browsers as quickly as they should, but you can't conclude any specifics about that from the recent study of Google logs....
DOJ Sued Over Cell Phone Tracking Practices
Wed, 02 Jul 2008 17:08:34 -0400
Civil liberties groups claim the Justice Department is bypassing warrants to obtain real-time tracking information on U.S. citizens....
Microsoft Internet Explorer Security Strikes Back
Wed, 02 Jul 2008 17:03:53 -0400
Microsoft Internet Explorer 8 Beta 2 security builds on the Phishing Filter of IE 7 and thwarts cross-site scripting....
IBM Helps Link POS to the Back Office
Wed, 02 Jul 2008 16:50:30 -0400
IBM and Epicor jointly release an offering that centrally manages and supports POS....

The Seattle Times: Business & Technology

Strike slows downtown construction projects
Thu, 03 Jul 2008 01:39:21 -0700
A strike has shut down or slowed work at some of the Seattle area's largest construction projects.
Investors sweeten Puget Sound Energy sale for public
Wed, 02 Jul 2008 21:57:36 -0700
Backers of a sale of the state's largest utility company, Puget Energy, offered Wednesday to sweeten the proposed deal for consumers by taking $100 million off any potential rate increases over the next 10 years.
Employers cut jobs for sixth straight month
Thu, 03 Jul 2008 10:50:59 -0700
Employers cut payrolls by 62,000 in June, the sixth straight month of nationwide job losses, underscoring the economy's fragile state. The unemployment rate held...

NYT > Technology

Judge Orders Google to Turn Over YouTube Records
Thu, 03 Jul 2008 22:38:40 -0000
The order raised concerns that the online video viewing habits of tens of millions of people could be exposed.
Bits: Justice Looks Further at Google-Yahoo Deal
Thu, 03 Jul 2008 10:04:14 -0000
The Justice Department’s antitrust division has begun issuing subpoenas as it probes further into whether a planned Google-Yahoo partnership in search advertising is anticompetitive.
Bits: What Is Facebook Worth? (Part 37)
Thu, 03 Jul 2008 22:12:43 -0000
A document in the settled Facebook ConnectU litigation reveals that Facebook’s common shares are worth a quarter of the value of the stock Microsoft purchased when it invested in the social network.

CNN.com - Technology

Judge orders YouTube to reveal its viewers
Thu, 03 Jul 2008 17:53:41 -0400
Read full story for latest details.
Microsoft may refresh Yahoo bid
Thu, 03 Jul 2008 11:42:37 -0400
Read full story for latest details.
Create new agency to study planet, group says
Thu, 03 Jul 2008 15:05:29 -0400
Read full story for latest details.

NPR Topics: Technology

Twitter, What Are You Doing? Co-Founder Tells All
Thu, 03 Jul 2008 10:51:00 -0400
Twitter.com has so many new users that the Web site keeps crashing. Meanwhile, Twitter engineers are taking popular features away for retooling. It's a painful process, but co-founder Biz Stone has a plan.
Young Moroccans Bypass Mainstream Media
Wed, 02 Jul 2008 10:00:00 -0400
When protesters in southern Morocco clashed with security forces, there was very little coverage from state-run television stations. But amateur video posted on YouTube showed what the official media would not. Young Moroccans say the Web is leaving traditional media behind.
Would a Ban on Car Conversation Be More Effective?
Tue, 01 Jul 2008 13:00:00 -0400
California and Washington join the long list of states to ban handheld cell phone use while driving. It's the conversation, not the phone, that's distracting, research says. Do these laws really make our roads safer?

BBC News | Technology | UK Edition

Google must divulge YouTube log
Thu, 03 Jul 2008 20:19:53 -0000
Google must divulge the viewing habits of every user who has ever watched avideo on YouTube, says a US court.
Warning letters to 'file-sharers'
Thu, 03 Jul 2008 17:41:04 -0000
The music industry says thousands of UK broadband users who share tracks illegally will be warned about it in letters.
Firefox download record official
Thu, 03 Jul 2008 00:28:35 -0000
The creators of Firefox 3.0 celebrate the news they have set a new world record for software downloads.

Reuters Video: Technology

Robo barman pulls first pint
Thu, 03 Jul 2008 09:03:25 -0400
Jul. 3 - Billed as the world's first robot barman, Mr Asahi pulls the crowds at London's Selfridges department store.
Tongue device to aid disabled
Mon, 30 Jun 2008 15:45:45 -0400
Jun. 30 - A new device that uses a tiny magnet can help disabled people steer a wheelchair or operate a computer using only the tip of the tongue.
MSN portal goes 'social'
Mon, 30 Jun 2008 14:10:23 -0400
Jun. 30 - Microsoft is announcing new services intended to reflect the social phenomenon taking place on the internet.

AP Top Technology News At 5 p.m. EDT

Court orders YouTube to give Viacom video logs
By ANICK JESDANUN Thu, 03 Jul 2008 19:57:36 -0000
NEW YORK (AP) -- Dismissing privacy concerns, a federal judge overseeing a $1 billion copyright-infringement lawsuit against YouTube has ordered the popular online video-sharing service to disclose who watches which video clips and when....
Internet addressing agency loses its own addresses
Thu, 03 Jul 2008 20:57:41 -0000
NEW YORK (AP) -- This doesn't sound good: The nonprofit agency in charge of the Internet's addresses recently lost track of its own....
Police wnt u to fight crime w/txt msgs
By MITCH STACY Wed, 02 Jul 2008 18:35:43 -0000
TAMPA, Fla. (AP) -- Police in the 1970s urged citizens to "drop a dime" in a pay phone to report crimes anonymously. Now in an increasing number of cities, tipsters are being invited to use their thumbs - to identify criminals using text messages....

CNET News.com

EA debuts new family, sports games for Wii, PlayStation
Thu, 03 Jul 2008 15:32:00 -0700
After its pairing with board game maker Hasbro, EA shows off its new family-oriented games and an "All-Play" series for Wii.
Video: Latest in Viacom-Google lawsuit raises questions
Thu, 03 Jul 2008 14:48:00 -0700
News.com's Dan Farber tells what's at stake for users' privacy as a result of a federal judge's ruling that Google must turn data over to Viacom.
Researcher faults Apple iPhone on security updates
Thu, 03 Jul 2008 14:22:00 -0700
He says iPhone, still at version 1.1.4, is at least four months behind desktop OS in patching many known Mac OS X security vulnerabilities.

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