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In this chapter, we have covered some of the efforts in the area of languages that have been developed to allow programs to be written for scalable computing. There is a tension between pure FORTRAN-77, FORTRAN 90, HPF, and message passing as to which will be the ultimate tools for scalable, high performance computing.

Certainly, there have been examples of great successes for both FORTRAN 90 (Thinking Machines CM-5) and HPF (IBM SP and others) as languages that can make excellent use of scalable computing systems. One of the problems of a high-level language approach is that sometimes using an abstract high-level language actually reduces effective portability.

The languages are designed to be portable, but if the vendor of your particular scalable computer doesn't support the language variant in which you have chosen to write your application, then it isn't portable. Even if the vendor has your language available, it may not be tuned to generate the best code for their architecture.

One solution is to purchase your compilers from a third-party company such as Pacific Sierra or Kuck and Associates. These vendors sell one compiler that runs across a wide range of systems. For users who can afford these options, these compilers afford a higher level of portability.

One of the fundamental issues is the chicken-and-egg problem. If users don't use a language, vendors won't improve the language. If all the influential users (with all the money) use message passing, then the existence of an excellent HPF compiler is of no real value to those users.

The good news is that both FORTRAN 90 and HPF provide one road map to portable scalable computing that doesn't require explicit message passing. The only question is which road we users will choose.

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, High performance computing. OpenStax CNX. Aug 25, 2010 Download for free at http://cnx.org/content/col11136/1.5
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