[mpich-discuss] mpich2 support processor affinity by default

[benzhi cao]

2013/3/22 benzhi cao <caobenzhi0915 at gmail.com>

> Hi~
>     when you run a program with multi-threads.(For instance ,you just type
> "mpiexec -n 4 ./app" to run an app with four threads.) ,obviously the
> processor manager will fork several processes to execute the app.What I am
> wondering is the MPICH2 support processor affinity by default? Does  the
> MPI process manager(MPICH2 hydra) will bind each forked process to a cpu
> automatically or just do nothing after forking the processes and waithing
> for  the os to dispatch this?
>      I am appreciate for any reply~Thanks in advance~
> Best~
>
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