Stack Overflow have a habit of migrating questions to other sites that they shouldn't. It's an inherent problem with having a site that permits any group of 5 users with migration rights to move a question (but a necessary problem; without it all the sites would just be a mess of questions that don't belong).

Steps are being taken to try and avoid these poor migrations. But one thing we generally don't do it migrate a question back to where it came from, because they have already indicated that they don't believe it fits their scope (<a href="#3878">as sysadmin1138 notes</a>, the question is un-migrated from the source site, but stays closed so that it can be re-opened).

Your question fits a real grey area that falls between a few different sites. It could be suitable for [Stack Overflow][2] (but not really as it's about benchmarking, not programming). It could be suitable for [Server Fault][3] (but not really, as it's not within the sort of scope we deal with as defined by the [FAQ]). It could be suitable for [Unix & Linux][4] due to its POSIX nature, as it seems related to fairly low-level stuff, but I most of us are wary of migrating stuff there as we don't really know if it fits their scope or not.

Ultimately I'd actually suggest posting your question over on [Unix & Linux][5] and see how you go.



  [2]: http://stackoverflow.com
  [3]: http://serverfault.com
  [4]: http://unix.stackexchange.com/
  [5]: http://unix.stackexchange.com/