GSoC openMP task scheduling Advice

[Tobias Burnus]

guray.ozen wrote:
> I thought gcc tasks/threads waiting too much on the idle than intel
> compiler's threads.

Regarding busy waits, you could try to tune the values of the 
GOMP_SPINCOUNT environment variable. Search for "@node GOMP_SPINCOUNT" 
in 
http://gcc.gnu.org/viewcvs/gcc/branches/gomp-4_0-branch/libgomp/libgomp.texi?view=co&content-type=text%2Fplain 
for details.

If you have enough cores which are available, there shouldn't be a 
problem with idle. (Except with tasks where one could argue that the 
threads should do task stealing instead.)

Tobias,
who leaves the other questions to Jakub