Questions tagged [Parallel calculations] (92)


Linux, and GCC OpenMP: multi-threaded program is 5-6 times slower than single-threaded?

Studying OpenMP, trying to parallelize a neural network. But for some reason always turns out that rasperedelenie app significantly slower than usual. What could be the problem? A single-threaded Compile:g++ -lrt -O0 main.cpp -o nnlv2 Compile:g++ -lrt -fopenmp -O...
theresa97 asked October 10th 19 at 13:55

Parallel programming under .NET?

Advise please book that in your opinion the best for learning parallel programming? In English.
bella62 asked October 10th 19 at 00:33

Parallel programming — ability to rollback the result of the function?

Quite long ago I read an article that described such a feature: Declare a function in a special way. If in the process of execution of the function has changed some data, then produce a rollback and it runs again. Thus it is possible detecti thread-safe and the absence of deadlocks. I do not remember even a programming lang...
tremayne.Pfannerstill asked October 9th 19 at 21:17

International research grants for graduate students?

With admission to graduate school, I began to seek out opportunities to obtain a research grant. More interested in the grants on the subject of parallel computing and construction of compilers. At the moment I only found the Kaspersky grant and a grant from Nvidia, about the latter recently mentioned in the news. Who else ...
kobe_Stiedemann asked October 8th 19 at 06:53

How to parallelize control of cameras in the Canon EDSDK using QThread?

Good afternoon. The situation is the following — there are two Canon camera EOS550D connected to the same computer that I want to make to make the pictures as at the same time. The control is realized by using EDSDK 2.10 To do this, classes were created on the basis of threads QThread, the task of which is to send a camera ...
leta17 asked October 7th 19 at 19:55

Organization Of Map-Reduce?

Zdrastvuyte. We have in a startup there are several tasks that boil down to the classical paradigm of Map Reduce. We want to spread tasks across multiple servers. Which decision is worth watching? You should pay attention to? Now I am thinking about two solutions: 1. famous Hadoop — a lot of talk about him and he is everywh...
leonor.Farre asked October 3rd 19 at 19:21

Where better to start programming?

Good day! I think similar questions were many, but I found only one, but a clear answer I found. Where better to start the programmer? Many suggest Pascal, others say si. Want to know why someone started this, thanks!
Scottie.Daugher asked October 3rd 19 at 18:24

Is there a portable analog of __attribute__((noinline))?

Actually, you need to disable inlining of functions: together with instruction reordering-om causes crashes. For gcc there is a special attribute, but do not want to limit yourself to gcc, and I want the Studio to collect and clangor and Intel compilers also. Is it possible a subject? So far, the solution is:#if defined(_MS...
luciano.Schmi asked October 3rd 19 at 16:28

the sending of multiple requests for the crown

there is a service with a list of many addresses of different IPAS, it is necessary each time to send the query and the result to be written to the database. what methods, technologies have you used for such problems, or presumably you can use. now works as a regular PHP script starting at the crown. when addresses are many...
london46 asked October 3rd 19 at 16:24

Educational program on "dataflow"?

In the article "Parallel programming with vychislitel..." there are links to some common context: "dataflow architecture", "computer count", "unstructured concurrency". However, in English. Wikipedia under the word "dataflow" means something completely different. Managed to find only one paper on the topic that I mean: Grap...
Nelson24 asked October 3rd 19 at 14:55