[Chito]

Did those kids get the e-mail?

[Biradallo]

ban them!

[Anykeylo]

I'm losing interest. Let me know if the prof goes apeshit

[agrismhig]

It's a job-based system? Is it a mainframe type system?

There are priority levels on the system for a reason. Grad student's **** should be run as "nice"

[iroxmxinau]

Asher, this prof's jobs will likely be run by HIS grad students. Very few jobs are actually run by profs. 90+% are grad students. Also, I'm not sure how "nice" factors into it (if it's the Unix type of "nice" which assigns system resources). The cluster assigns the next job in line for which there are adequate resources. So if there's 300 processors free, one guy submits job A for 400 processors and then the next guy submits job B for 200 processors job B gets run immediately while job A goes on the queue. It's not usually an issue. Even the big jobs get run within a day or two.

[QuidQuoPro]

Seriously, though, they're going to need to set some protocols up soon. There's one guy who's been using 20-25% of capacity consistently (every time I check he's on this many processors) for the past 6 months.

[Cyzkrahu]

What kind of processors?

[greeferweq]

Not bad.

Congrats on the Rowland Prize?

[QqJamxqP]

The three *******s' jobs have "disappeared" despite the fact that they had walltimes between 36 and 72 hours.

[Xavier_Spinner_Wheels]

I hope you use the Intel compilers, not that gcc trash.

[Enjknsua]

The info on number of clusters seems to be out of date. Other than that, everything looks right.

[strmini]

Have to use gcc. All the makefiles are already optimized for it.

You might as well cover your code with molasses and wade around it with lead pants.

[Phouepou]

Anyway, most of heavy-lifting stuff is written in FORTRAN.

So use the Intel Fortran compiler.

[Saispapedlimi]

He probably compiled it with gcc.

[egershna]

WTF research could this ******* POSSIBLY be doing that has taken him 6 months on 300 processors?

Studying the effect of a mass zombie attack?

[carpartsho]

This is why research needs to be better-prioritized. A couple of hours can help us learn the best way to limit the damage of zombie attacks, while it takes 6 months to do something useless like learning how to predict earthquakes or make better motor oil.

[Qeiafib]

gcc is a 1984 Toyota Corolla to Intel's 2009 McLaren F1.

Intel's compilers are far, far faster. They'll utilize SIMD hardware far, far more often in far, far better ways. You can write some benchmarks yourself, or google for them.

http://www.luxrender.net/forum/viewtopic.php?f=21&t=603

On average, Intel's compiler is about 10-20% faster than gcc on the exact same code, sometimes much higher (depending on the use of vectors). 10-20% is massive for HPC.

If your compute nodes are x86, use Intel's compiler. If they're PPC, use IBM's compiler. They're both in another league from GCC in terms of performance. GCC is a utilitarian/toy compiler. The kind of **** you compile crappy desktop apps with.

[gooseCile]

What about Digital Mars, Asher?

[Nafheense]

All his jobs are named EXACTLY the same thing too: "sliding"

???

****er. He's obviously either soft condensed matter or geophysics.

His name isn't Quinn Mallory, is it?

[avappyboalt]