[Development] QProcess fork() failure and overcommit
thiago.macieira at intel.com
Tue Mar 7 22:05:21 CET 2017
Em terça-feira, 7 de março de 2017, às 17:53:41 CET, René J.V. Bertin
> One tends to forget (I do at least) that spawning a little helper process
> can be quite expensive, sometimes prohibitively so. Makes you wonder what
> kind of cross-platform alternatives there are!
It shouldn't be.
fork() does need to copy the page tables and mark the pages as shared. It also
means COW of certain pages. But the overhead shouldn't be that big.
If anyone is seeing this, can you run your application with strace to get the
strace -T -e clone
Add -f if the forking is happening outside the main thread.
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
More information about the Development