OPenMP loop increment

Is it OK to use loop increment greater than 1?

开发者_高级运维

#pragma omp parallel for schedule(dynamic, 1000)
for (int i=0; i<100000; i+=10)
{
    // do something that uses i
}

Thank you.

---

Yes.

The allowed form for the for loop is:

for (init-expr; test-expr; incr-expr) structured-block

Where incr_expr is any of:

++var
var++
--var
var--
var += incr
var -= incr
var = var + incr
var = incr + var
var = var - incr

See http://www.openmp.org/mp-documents/OpenMP3.1.pdf page 40.

---

Another way of thinking of it is:

#pragma omp parallel for schedule(dynamic, 1000)
for (int i=0; i<100000; i+=10)
{
    // do something that uses i
}

Could be rewritten as

#pragma omp parallel for schedule(dynamic, 1000)
for (int j=0; j<10000; j++)
{
    i = 10*j;
    // do something that uses i
}