backtop


Print 72 comment(s) - last by quiksilvr.. on Jan 11 at 8:08 PM

These days even a desktop computer is capable of some extreme number crunching

Getting a lot out of a little is one of the most fascinating forms of enthusiasm in the tech community.  Whether it's squeezing Windows 7 onto a Pentium II dinosaur, or making a homebrew SNES handheld, such endeavors are truly intriguing.

Perhaps the latest and greatest wonder of hardware overachievement is the story of French native Fabrice Bellard, who now holds the world record in PI calculation.  He calculated Pi to 2.7 trillion decimal digits, surpassing mark of 2.5 trillion digits set in August by the T2K Open Supercomputer (which at the time was the 47th most powerful supercomputer in the world).

So what's so impressive about Mr. Bellard's feat, aside from its basic technical merits?  He accomplished the number crunching, not on a supercomputer, but on a Nehalem-powered desktop.

His machine featured a Core i7 CPU running at 2.93 GHz, 6 GB of RAM, and five 1.5 Terabyte Seagate Barracuda 7200.11 model hard drives (for a total of 7.5 TB).  The system ran the 64-bit Red Hat Fedora 10 distribution as its primary OS and used software RAID-0 and the ext4 file system.

The result takes up 1137 GB of storage and is (partially) available here.  The computation took 103 days of computing time for the modest desktop. 

The only time when Mr. Bellard had to enlist the help of other computers was during the verification.  In order to avoid being displaced from the top spot while the desktop chugged on the results (that would have taken an additional 13 days), he instead used a network of nine computers to verify the results in a shorter timespan.

In order to calculate Pi, Mr. Bellard used a software algorithm based on the well known Chudnovsky formula and verified the resulting calculations by the Bailey-Borwein-Plouffe algorithm which directly gives the n'th hexadecimal digits of Pi.  Checksums were used to detect errors.

The more optimized Pi algorithm based on the Chudnovsky formula that Mr. Bellard uses is the fastest current way to calculate Pi and has been renamed Bellard's formula in his honor.  Mr. Bellard is perhaps most famous for writing the tiny c compiler (tcc), a popular lightweight compiler in the Linux community.



Comments     Threshold


This article is over a month old, voting and posting comments is disabled

RE: Vive la France
By rlandess on 1/5/2010 3:06:11 PM , Rating: 5
Maybe the first useful thing since the rabies vaccine, the parachute, the diesel engine, the altimeter, the gyroscope, the photograph and cinema.


RE: Vive la France
By messyunkempt on 1/5/2010 3:18:28 PM , Rating: 5
Well yeeeeah, but apart from the rabies vaccine, the parachute, the diesel engine, the altimeter, the gyroscope, the photograph and cinema, what have the french ever done for us?


RE: Vive la France
By messyunkempt on 1/5/2010 3:30:16 PM , Rating: 5
Oooooh and the bikini! God bless you Jacques Heim and Louis Reard. Never before has so much been owed by so many to so few. *salutes*


RE: Vive la France
By Legolias24 on 1/5/2010 4:27:47 PM , Rating: 1
Don't forget, democracy, existentialism and the blow job! :P

"You've got to shake it, before you bake it!"


RE: Vive la France
By Gzus666 on 1/5/2010 7:32:13 PM , Rating: 2
Also don't forget rifling. French general came up with that. And their cooking is world renowned.


RE: Vive la France
By afkrotch on 1/5/2010 9:09:25 PM , Rating: 2
Rifling came from Jaspard Zoller. Austrian, I believe.


RE: Vive la France
By wetwareinterface on 1/6/2010 8:31:55 AM , Rating: 2
he invented rifling so the barrels would survive all the drops they had to endure from french army soldiers. :)


RE: Vive la France
By PrezWeezy on 1/5/2010 8:14:20 PM , Rating: 3
Democracy stems from Ancient Greece...at least in any form used today, which is representative democracy.


RE: Vive la France
By hashish2020 on 1/5/2010 11:49:27 PM , Rating: 3
The Greeks used direct democracy


RE: Vive la France
By PrezWeezy on 1/6/2010 3:50:45 PM , Rating: 2
I was actually referring to what we use today which is representative, not to what Greece developed.


RE: Vive la France
By GodisanAtheist on 1/6/2010 1:23:17 PM , Rating: 2
Yeah I think you're looking for Romans.


RE: Vive la France
By Yawgm0th on 1/6/2010 3:29:41 PM , Rating: 2
It's a quote from a Will Ferrell movie. It's not true, of course. France was relatively late to the representative democracy table.


RE: Vive la France
By Donkeyshins on 1/6/2010 4:41:41 PM , Rating: 3
Actually, it is a take on a quote from Monty Python's Life of Bryan...predates Will Ferrell by about 30 years.


RE: Vive la France
By DOSGuy on 1/5/2010 11:42:02 PM , Rating: 5
I'll bet you five copies of the Kama Sutra that people in India were blowing each other before France became a nation. :P


RE: Vive la France
By afkrotch on 1/5/2010 9:20:18 PM , Rating: 3
Wouldn't the bikini be Greek? Modern day bikini would be French though.

I prefer women in a one-piece over a bikini anyways.


RE: Vive la France
By wetwareinterface on 1/6/2010 8:34:11 AM , Rating: 4
i prefer women in a zero piece suit myself.


RE: Vive la France
By wetwareinterface on 1/6/2010 8:35:34 AM , Rating: 2
or for the sake of on topicness

3.14159/0 piece suit.


RE: Vive la France
By Chocobollz on 1/6/2010 9:34:02 AM , Rating: 3
That would give an error.. LOL


RE: Vive la France
By Hieyeck on 1/6/2010 10:12:05 AM , Rating: 5
A woman covered in pie is never an error.

Sexism be damned, I couldn't resist.


RE: Vive la France
By DM0407 on 1/5/10, Rating: -1
RE: Vive la France
By Iaiken on 1/5/2010 4:58:05 PM , Rating: 4
And here I thought the Athenians had invented it over 2500 years ago...


RE: Vive la France
By gmljosea on 1/5/10, Rating: 0
RE: Vive la France
By adiposity on 1/5/10, Rating: 0
RE: Vive la France
By Phynaz on 1/5/2010 4:41:48 PM , Rating: 4
French hookers.


RE: Vive la France
By DM0407 on 1/5/2010 5:43:46 PM , Rating: 2
They also kinda ruled Europe on two separate occasions too.The Franks with Charlemagne, French with Napoleon (twice).

More importantly though, they produced scantily clothed eye candy that cleans. The French maid


RE: Vive la France
By afkrotch on 1/5/2010 9:02:38 PM , Rating: 2
Diesel engine was invented by a German. Rudolf Diesel to be exact.

Gyroscope was designed by a German using spheres. Later on an American came along and made one using discs. Then some French guys came along and played with them and called it a gyroscope, since the original name "machine" from the German was kind of retarded.

Would cinema be considered invented by the Italians or the Americans?


RE: Vive la France
By messyunkempt on 1/5/2010 9:21:57 PM , Rating: 3
quote:
Diesel engine was invented by a German. Rudolf Diesel to be exact


Of german decent maybe, he was born in france to bavarian immigrants.


RE: Vive la France
By messyunkempt on 1/5/2010 9:23:05 PM , Rating: 2
*Descent


RE: Vive la France
By afkrotch on 1/5/2010 9:40:33 PM , Rating: 2
At which point, he went to London. Then at the age of 12, was sent to live with his relatives in Bavaria. Later on, lived in France some more. Then in Germany some more. Then died/killed/suicided.

Considering his parents, where he's lived, and where he was educated, I'd say he was German. He just happen to live in France for a few years.


RE: Vive la France
By SorinNita on 1/11/2010 8:34:50 AM , Rating: 2
Hmmm.. The diesel engine? Don't think so... Unless you consider Rudolph Diesel to be french.


"We are going to continue to work with them to make sure they understand the reality of the Internet.  A lot of these people don't have Ph.Ds, and they don't have a degree in computer science." -- RIM co-CEO Michael Lazaridis














botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki