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By Posted 05/18/20080
An architecture for distributed computing and resource sharing. A grid system is composed of a heterogeneous collection of resources connected by local-area and/or wide-area networks (often the Internet). These individual resources are general and include compute servers, storage, application s...
Generic programming
By Posted 05/18/20080
A style of computer programming where algorithms and data structures are adaptable through an extended grammar (parameterization) that lets variable parts be specified with each use of the algorithm and instantiated in optimized form by the compiler. Standard Template Library (STL) is often cit...
By Posted 05/18/20080
Programming language features which allow programs to contain placeholders for certain entities, typically types. The generic component's definition is completed before it is used in a program. Generics are included in Ada, C++ (via templates), and Java. See also generic programming.
By Posted 05/17/20080
A reusable, partially complete program that embodies a design for applications in a particular domain. Programmers complete the program by providing application-specific components.
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Parallel Programming on Multi-Core News - Parallel Radio, Larrabee, Emulator & New Bloggers
By aaron-tersteeg (Intel) Posted on 08/13/08 0
Parallel Programming Talk RadioClay Breshears and I did our second 15 min Parallel Programming Talk radio program this morning at 8:00AM PST. We had David Rich of Interactive Supercomputing on as a guest to talk about their Parallel Programming tools for engineers. I feel really good about how it...
Intel Software Guest Blogger Asaf Shelly - About Me
By Asaf Shelly Posted on 08/13/08 1
It is so easy to tell the difference between the office of a hardware developer to a software developer's. When you visit a hardware engineer it takes forever to find a place for the coffee cup because even the chairs have some box on them with wires coming out. When you visit a programmer you ca...
GCDC’08: read about „Intel Threading Building Blocks“
By mike-huelskoetter Posted on 08/13/08 0
One of the most discussed topics at Games Convention Developers Conference 2008 will be „multi-threaded coding“. Leigh Davies will talk about it, and Jerome Muffat-Méridol as well: Intel Threading Building Blocks (TBB) is one of key solutions if you want to turn your single-threaded gaming app in...
GCDC'08: multi-thread your DirectX code and drivers
By mike-huelskoetter Posted on 08/13/08 0
When Intel‘s spokesman Leigh Davies will enter the stage on Tuesday, 19 August during Games Convention Developers Conference 2008 (GCDC’08), a lot of people will probably listen closely to his words. Leigh will try to answer the interesting question: „How do you get complex graphics through a sin...
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Poor threading performance on Intel Xeon E5-2680 v2
By Pascal10
Hello I am running a visualization program (visualizing a large dataset) where I can either use MPI or pthreads. When I run it on my desktop which has an Intel i7-2600K (4 cores, 8 threads), I get better performance using pThreads (I'm using a lot of threads, e.g 32) compared to using MPI which is normal (I guess). But when I run the same code on one node (which is part of a cluster) which has Intels Xeon E5-2680 v2 (10 cores, 20 threads), the performance I get using pthreads is worse than MPI; about 70s while using MPI compared to 180s using pthreads. Even worse, the performance on the Intel Xeon E5-2680 v2 is lower than on that of the Intel i7-2600K, it's around 100s on the 2600k but 180 on the  E5-2680 (same number of threads on both). I check using the top command and all the cores are active when I run the program.   So my question is why is that happening? Is there some other way I should be compiling the code on the E5-2680? Is there some variables I should set like KMP_AFFIN...
HTM/STM and Scheduling
By Simone A.1
Hi, I have a question about Hardware and Software Transactional Memory. Given the types of versioning (eager and lazy) and conflict detection (optimistic and pessimistic) and let's say that 2 or more threads are performing a transaction that write/read the same memory location. The scheduling of the threads could affect the ability of detect a conflict? Which combination of versioning and conflict detection would be better to always catch the conflicts? Hope my question is clear. Thanks. Best Regards, Simone
Locking CPU cache lines for a thread ( L1)
By Younis A.14
Hi I'm working on securing access to L1 cache by locking it line by line. Is there any way to do it? For example, two threads accessing the L1 and L1 lines are locked for a certain time to each thread accessed them. Regards, Younis
Responsive OpenMP Theads in Hybrid Parallel Environment
By Don K.1
I have a Fortran code that runs both MPI and OpenMP.  I have done some profiling of the code on an 8 core windows laptop varying the number of mpi  tasks vs. openmp threads and have some understanding of where some performance bottlenecks for each parallel method might surface.  The problem I am having is when I port over to a Linux cluster with several 8-core nodes.  Specifically, my openmp thread parallelism performance is very poor.  Running 8 mpi tasks per node is significantly faster than 8 openmp threads per node (1 mpi task), but even 2 omp threads + 4 mpi tasks runs was running very slowly, more so than I could solely attribute to a thread starvation issue.  I saw a few related posts in this area and am hoping for further insight and recommendations in to this issue.  What I have tried so far ... 1.  setenv OMP_WAIT_POLICY active      ## seems to make sense 2.  setenv KMP_BLOCKTIME 1          ## this is counter to what I have read but when I set this to a large number (2500...
Optimizing cilk with ternary conditional
By Fabio G.3
What is the best way to optimize the cycle cilk_for(i=0;i<n;i++){ x[i]=x[i]<0?0:x[i]; }or somethings like that? Thanks, Fabio
have asked them to
By Robert P.0
ICC t20 World Cup 2014 Live StreamIndia vs Pakistan Live Stream
Optimizing reduce_by_key implementation using TBB
By Shruti R.0
Hello Everyone, I'm quite new to TBB & have been trying to optimize reduce_by_key implementation using TBB constructs. However serial STL code is always outperforming the TBB code! It would be helpful if I'm given an idea about how reduce_by_key can be improvised using tbb::parallel_scan. Any help at the earliest would be much appreciated. Thanks.
reading a shared variable
hello everyone I am relatively new to parallel programming and have the following doubt:- is reading a shared variable(that is not modified by any thread) without using locks a good practice thanks for the help in advance  
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