Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Present your own fully documented and tested programming example illustrating the prevention of a data race in a parallelised program.
This is an example where total number of prime number between 2 and 10000 is being calculated. The order of memory accesses is prevented from being non-deterministic and from the code data race is avoided by making it parallelized with OpenMP directives. The inconsistency can be seen by running the program consecutively for 3 or more times.
#include
#define MyThreads 4
#define num 10000
int primeNum[num];
int primeF[num];
int is_prime(int v)
{
int i;
int lim = floor(sqrt(v)) + 1;
for (i = 2; i < lim; i++) {
/* no need to check against known composites */
if (!primeF[i])
continue;
if (v % i == 0) {
primeF[v] = 0;
return 0;
}
return (v > 1);
int main(int argn, char **argv)
int total = 0;
printf("Enter a number greater than 2");
scanf("%d", &num)
#ifdef _OPEnumMP
omp_set_dynamic(0);
omp_set_num_threads(MyThreads);
#endif
for (i = 0; i < num; i++) {
primeF[i] = 1;
#pragma omp parallel for
for (i = 2; i < num; i++) {
if ( is_prime(i) ) {
primeNum[total] = i;
total++;
printf("total prime numbers that lie between 2 and %d: %d\n",
num, total);
How Virtual memory is implemented Virtual memory can be implemented along with Segmentation and Paging
Q. What are the major differences between capability lists and access lists? Answer: An access list is a list for each object consisting of the domains with a nonempty set of
Consider a scenario of post mailbox, there are two processes named sender S and receiver R. Both processes can communicate with each other by name along with message. You need to I
what is instant messaging used for
Regard as a computer system that runs 5000 jobs per month with no deadlock-prevention or deadlock-avoidance scheme. Deadlocks take place about twice per month and the operator must
Deadlock Prevention Prevention is the name given to method that guarantee that deadlocks can never happen for the reason that the way the system is structured. Since 4 conditio
Define Overflow Chaining Another method will divide the pre-allocated table into two sections: the primary area to determine which keys are mapped and an area for collisions, g
Define the Communications Techniques - Application interaction protocols Communications techniques are well defined. They give developer the programmatic mechanism to transf
Q. Why is it significant to balance file system I/O among the disks as well as controllers on a system in a multitasking environment? Answer: A system can perform mere
Ask question Project Details PROJECT OVERVIEW The ABC Hospital is upgrading their version of Windows. As part of the upgrade, 100 new computers will be purchased. Your task is to
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd