Thanks Tim, I thought that the gcc list was the most appropriate one
regarding the gomp implementation, but I'll post this question on the
gcc-help list.
By the way, Ubuntu 9.10 is the latest version (dd Oct. 2009). HTT works
fine for daily use, but massive parallel applications show some odd
On 2/11/2010 2:00 AM, Edwin Bennink wrote:
Dear gcc list,
I noticed that starting an OpenMP parallel section takes a significant
amount of time on Nehalem cpu's with hyper-threading enabled.
If you think a question might be related to gcc, but don't know which
forum to use, gcc-help is more
Dear gcc list,
I noticed that starting an OpenMP parallel section takes a significant
amount of time on Nehalem cpu's with hyper-threading enabled.
The differences with HTT turned on and off are really huge:
- HTT disabled: about 100.000 parallel sections per second
- HTT enabled: about 15 pa
