Thanks, so, if I got it right, I should put -axW instead of -aW Which file do I have to modify?
Lorenzo Il giorno , John Peterson <[email protected]> ha scritto: > On Thu, Jun 10, 2010 at 11:33 AM, John Peterson > [email protected]> wrote: > > On Thu, Jun 10, 2010 at 11:22 AM, Lorenzo Alessio Botti > > [email protected]> wrote: > >> > >> Hi all, > >> is there any compiler option to run on heterogeneous clusters? > >> > >> I'm compiling on the frontend node which is a xeon and on all the xeon > nodes everything works, but when I try to run on opteron nodes I just > get "Illegal instruction". > >> I'm using icpc. > >> > >> Does anyone know how to solve this problem? I'm having trouble because > the cluster is half xeon and half opteron... > > > > Sounds pretty schizophrenic! > > > > You *might* be able to get a single executable that will run on both > > xeon and opteron nodes at the same time, at a minimum you will have to > > turn off all the SSE instructions which are specific to one chip or > > another. > > > > Under intel these are -ax[S,T,P,B,N,W,K]. By default, it looks like > > libmesh sets -xW for you which, according to my compiler docs, "Can > > generate specialized code paths for SSE2 and SSE instructions for > > Intel processors". > Wait, that is for -axW. -xW is what's set by LibMesh: > "Can generate SSE2 and SSE instructions, and it can optimize for > Intel(R) Pentium(R) 4 processors and Intel(R) Xeon(R) processors with > SSE2. This is the default on Linux systems using Intel(R) 64 > architecture. This option is the same as specifying -march=pentium4." > So if your front-end is a xeon, the compiler likely generated > xeon-specific code that won't run on opteron. > -- > John ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
