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stan_kvasov
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parallel_performance
parallel
cppcafe
concurrency
parallel_computing
3 Comments
3,155 Views
Today’s multicore processors support many threads of execution and can provide substantial performance when running multithreaded applications. Unfortunately, multithreaded programming is difficult, and as a result, a lot of today’s software is still...
from Blog: C/C++ Cafe


Implementing a Scalable Parallel Reduction in Unified Parallel C Community Blog
NancyWang
Tags:
cppcafe
upc_programming
parallel
upc_forall
parallel_performance
reduction
parallel_computing
upc
3,236 Views
A reduction is the process of combining elements of a vector (or array) to yield a single aggregate element. It is commonly used in scientific computations. For instance the inner product of two ndimensional vectors x, y is given by: This computation requires...
from Blog: C/C++ Cafe


Implementing a Scalable Parallel Reduction in Unified Parallel C (part 3) Community Blog
NancyWang
Tags:
parallel
reduction
upc
upc_forall
cppcafe
parallel_computing
parallel_performance
parallel_programming
2,370 Views
continue from the second parallel reduction blog . To get better scalability (increased program performance as the number of threads increases), it is critical to remove the lock in the upc_forall loop. This can be done by accumulating the partial sum...
from Blog: C/C++ Cafe


Implementing a Scalable Parallel Reduction in Unified Parallel C (part 2) Community Blog
NancyWang
Tags:
parallel_computing
reduction
cppcafe
upc
parallel_programming
upc_forall
parallel
parallel_performance
1 Comment
2,851 Views
continue from the previous parallel reduction blog The result is obvious wrong, but what is the problem? The keen reader might point out that the program as written contains a race condition. Multiple threads can write into shared variable "sum" concurrently,...
from Blog: C/C++ Cafe
