Parallel.For executes a for loop in which iterations may run in parallel to each other.
Parallel.For executes a for loop in which iterations may run in parallel to each other.
Questions tagged [parallel-for]
98 questions
0
votes
2 answers
Delay in parallel computing
I'm using parallel.for to launch in many threads a external program. But despite the fact that these are separate threads I need implement sth like delay. E.g. 2 threads want to launch this external program at the same moment - then one of them…
Saint
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tbb loop sysmalloc: Assertion
I am new to tbb and I am trying to use parallel_for to run image data but I don't think it is working
here is me original loop
for (int count = 0; count < 100; it++, count++) {
dt.insert(dt.end(), it->begin(), it->end());
…
kmia
- 15
- 3
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How to make for loop run in Parallel using Python?
I have a data frame to process and I am trying to process that data frame in parallel instead of a sequential approach. The function that I am trying to make parallel return the list of values which is added to another list after obtaining the…
Upriser
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Parallel For loop inside razor view in Asp MVC
Just wondering how to write a parallel loop inside razor view in Asp MVC, I want something like this:
@Parallel.For(0, 10, i =>
{
Hello World!
}); but I am unable to write Html code inside the loop. Thank you in advance for your help!
Bed
- 1
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0 answers
ParallelFor stuck
Prepare a static class, with a static property, static method, and a static constructor, then the bug comes:
public class ParallelForBug
{
public static string StaticProperty = "StaticProperty";
static void method(int i)
{
…
Mike
- 91
- 3
0
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1 answer
ADLS ConcurrentAppend giving corrupt data for 1 MB files
When I use Parallel.For loop to append 10 files of 1 MB size concurrently to Azure Data Lake Service, I only see the content of last 2 files on my Azure Data Lake file, although I see the correct data getting printed to console.
When I use a simple…
kchahat20
- 67
- 8
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0 answers
How to correctly parallelize an inner loop within a parallel region?
I am trying to parallelize inner for loops inside a parallel region:
int num_threads, num_procs,max_row;
double start_time;
int i,h;
# pragma omp parallel default(none) \
…
grace9
- 27
- 5
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1 answer
Does Concurrency::parallel_for has a command similar to omp_set_lock?
I have a class (say particle) which has a variable (say param1):
class particle
{
double param1;
. . .
omp_lock_t particle_lck;
. . .
};
and a std::vector containing some instances of the particle class,
vector …
0
votes
1 answer
c++ ppl.h for parallel_for in linux
I made project in windows using c++ and now I am trying to build my project in linux(ubunt).
However, I couldn't find ppl.h in linux.
I used a lot of parallel_for in my project.
What is the replacement can I use?
kangfox
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Part of task in a task_group execute on main thread instead of a dedicated thread
I have a problem with tbb parallel_for() and task_group::run().
I have a code which launch a task on thread using task_group::run(). In this task, I use parallel_for() to parallelized a function.
On the other hand, on the main thread, I do other…
Francois
- 31
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2 answers
OpenMP parallel "for" with "static" schedule
I've a confusion or maybe a misunderstanding of the parallel for behavior with a static schedule and default chunk size.
For example the below picture What I excepted to have is yes the
master thread will take an extra iteration but I excepted…
N0rA
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0
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2 answers
virtual function and "no legal conversion for this pointer"
I have two classes as follow.
class NeuroShield
{
public:
NeuroShield();
uint16_t begin();
void setNcr(uint16_t value);
uint16_t getNcr();
void setComp(uint8_t value);
uint8_t getComp();
void setLastComp(uint8_t…
batuman
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2 answers
tbb determines incorrect concurrency
I am using tbb for parallelization and I have encountered an annoying issue.
I use tbb::parallel_for and the algorithm is running on a single thread.
if I print
std::cout << tbb::task_scheduler_init::default_num_threads() << std::endl;
it reports…
user1396055
- 245
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0 answers
concurrency::parallel_for iterates inconsistently each time
I am using parallel for in one of my application which contains a loop like below. My understanding is that the parallel_for loop will iterate through the entire range but not necessarily in sequential order, but it will iterate through the entire…
Siddharth Chabra
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0 answers
C# Parallel For loop not always exiting when done [intermittent error]
So I have a parallel for loop which works perfectly on its own, basically it loops through a 32000 item collection and does some parsing and math and what not and outputs the expected result.
It takes long enough to warrent a loading bar so I made a…
Matt Wilson
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