Single-CPU benchmark on Intel 4-core Clovertown on regular CPU cores and the
associated SSE3 units.
Compiler version: Intel ifort 9.1.040
Remarks:
-        : No problems encountered, except that on Linux systems the
           ulimit -s unlimited command must be given. Otherwise, allocation
	   problems occur for the larger problem sizes in programs
	   mod2d, mod2ci, mod2cr, mod2d, and mod2i.
	   This (minor) problem was not encountered for ifort version < 9.
-        : Although the performances per core are generally excellent,
           when one tries to run multiple copies of the same program at more
	   cores at a time, the processor runs into serious trouble:
	   running the sparse matrix-vector multiply program, mod2as, on 
	   2 cores (2 copies) degrades the performance by about 30%. When one
	   attempts to run more than 2 copies, the system stalls indefinitely:
	   the only way to get the system back on is to switch it off and
	   reboot it! 	   
