Is there a minimum breakeven threshold regarding the objective function time to have the parallel cpu optimization faster than the sequential one?

More Ahmed Hassan Yousef's questions See All

Is it possible to run simulink model predictive control on tivac?

Is it possible to generate C code for simulink model predictive controlto execute it on tivac lot?

02 March 2018 1,844 3 View

Is there a measure of the difficulty of a constrained problem?

I am working in university time tabling problem. I need a measure of the problem difficulty. For example, a lecturer who can come one day only per week is a more difficult constrain than another...

01 February 2016 3,781 2 View

How to simulate Atomic Operations in Tesla K20 GPU?

I had a program that used atomic operations in a small GPU Geforce 720. I am moving to used Tesla K20. The nvcc compiler on Tesla stated that atomicAdd is not supported. Is there a solution for that?

09 October 2015 9,958 2 View

Is there an available Tesla 20 or 40 GPU for remote code execution?

I am searching for a university or institution that has a system to enable remote code execution on a machine that has a tesla 20 or 40 GPU.

08 September 2015 3,856 0 View

Can Scatter algorithm become faster than the Gather Algorithm in GPU?

I am implementing an algorithm on GPU. The scatter version of the algorithm uses atomic token extensively, distributing N^2*h*w values on N^4 output location where N ranges from 5-40. The...

08 September 2015 3,386 10 View

How is the number of function evaluation computed in Global search?

I used GS with a function on image processing that calculates the symmetry of two images. The number of function execution increases dramatically when the size of the image is doubled. Does anyone...

02 March 2015 6,164 1 View

Integrating Matlab, c and Cuda, how to avoid linking error?

When I used Matlab mix in order to connect matlab mx function written in c with the cuda runtime, a linking error appear about conflict in static release and dynamic release between the c file and...

02 March 2015 7,853 1 View

How to add equality constrain to the objective function in the Matlab simulated annealing optimization functions?

I am using Simulated Annealing matlab functions. I need to add equality constrain for the parameters. How can this be done.

01 February 2015 7,812 3 View

How do you build a web enabled GPU server?

I need to build a cloud or a web based GPU server. A C/C++ web editor is needed to enable users to write their programs. If debugging for sequential and parallel is allowed, this will be great.

01 February 2015 6,884 3 View

Does anyone have the pseudo code for global search matlab algorithm?

Does anyone have the pseudo code for Global search Matlab algorithm? I have already the Ugray paper but it seems that are some minor differences.

31 December 2014 317 2 View

Timeout error!! Processor in the loop (PIL) using STM32F4 Matlab 2018a?

Dear Researchers I am trying to perform a PIL simulation using STM32F4 Discovery board and comunication serial USB TO TTL. During simulation I receive the following timeout error: An error...

01 March 2021 2,327 1 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

How to prevent ANFIS Model from negative prediction values in MATLAB?

I have input and output data set for "ANFIS modeling in MATLAB", and I am getting some negative predicted values of output in testing. However, the predicted values of output in training are...

28 February 2021 3,459 3 View

How does an AC-DC power supply Flyback Converter Based USB Charger Model using Matlab/Simulink looks like?

I am required to learn about Flyback converters and I got stuck not knowing to full design of the power supply flyback converter Based USB Charger Model using Simulink, especially the design model...

25 February 2021 5,435 2 View

Please. Could you help be in implementing Fractal Discrete Cosine Transform algorithm in Matlab?

I do need the Matlab code of Fractal Discrete Cosine Transform (FDCT). Can anyone who has already implement this code, help me with the implementation of this transform?

24 February 2021 5,602 2 View

D2D implementation in Matlab in Vienna LTE software?

Hi Hope you are well. Can you please share your code for D2D implementation in Matlab. I want to implement D2D in Matlab based Vienna simulator and struggling to deploy D2D. Thanks

24 February 2021 9,378 3 View

Multi effect distillation modeling in EES?

Dear colleagues If anyone has a model of multi-effect distillation in EES or MATLAB software, please send it to me.

24 February 2021 7,282 1 View

What program can I use to caclulate dipole moment efficiently and without the need of excessive computation?

Hi, I am a third year chemistry undergrad doing my group project in which I need to predict the HPLC retention time of 20 aromatic molecules. to do this we require the chemical properties of these...

24 February 2021 1,384 3 View

Does anyone ever solved this following Matlab error : "Error using imaqdevice/start (line 95) pointgrey: Failed to stop the camera acquisition." ?

I use Matlab 2014b to capture some images with a PointGrey camera connected with USB3 port. I initialize the camera in a function which basically execute these followed lines : vid =...

22 February 2021 6,386 1 View

How to build fouling and erosion simulation model for Aero Engine compressor and turbine rotor in Simulink / Matlab?

22 February 2021 3,697 1 View

Antonio Esposito

ok,Ahmed, when we talk to compare sequenntial vs. parallel execution time, we have to consider algos optimized for a machine and/or running on the bare hardware,..differently if the algos run on a software virtual machine, where a software layer or some kind of O.S., is in between. Execution time of parallel algos are high sensitive with respect of the underlayer of hardware-sotware architecture.

Guillaume Lemaître

It happens to me in Matlab when the process in the parfor was "light". The reason is explained there (http://www.mathworks.com/matlabcentral/answers/32460-parfor-slower-than-for-for-simple-tutorial-example) and is due to overhead to send and collect result and the synchronisation of the processes.