We have a very large structure ~10GB. GCC does not seem to have a problem with it but ICC is seg faulting. I've boiled it down to simple assignment statements. Any ideas? Files attached. If we don't allocate but declare the structure it works fine. Any problems with Intel allocating large amounts of memory? We've tried moving things around in the structure definition but it continues to seg fault.
icc -mcmodel=medium -shared-intel -g test.c -o test
gcc -mcmodel=medium -g test.c -o test
icc: Version 12.1.5.339 Build 20120612
gcc: gcc (GCC) 4.4.6 20120305 (Red Hat 4.4.6-4)
GCC output:
Allocate the grid struct
sizeof of grids 9.393871GB
Address of grids->G2.rain.count 0x7f5d05143190
Address of grids->G2.d0.count 0x7f5d61d35190
Address of grids->G2.Nt.count 0x7f5d96d2d190
Address of grids->G2.dBZm.count 0x7f5f079a0190
location: 0
G2.dBZ.stdev[ii][jj][kk][ll][mm] = 2.001000
Address of grids->G2.dBZm.count 0x7f5f079a0190
assigned G2.dBZm.count
assigend G2.dBZm.mean
assigned G2.dBZm.stdev
Address of G2.d0.count 0x7f5d61d35190
Going to assign d0.count
assigned G2.d0.count
Going to assign d0.mean
assigned G2.d0.mean
Going to assign d0.stdev
assigned G2.d0.stdev
Successful write
Intel ICC:
Allocate the grid struct
sizeof of grids 9.393871GB
Address of grids->G2.rain.count 0x7fc9e070f190
Address of grids->G2.d0.count 0x7fca3d301190
Address of grids->G2.Nt.count 0x7fca722f9190
Address of grids->G2.dBZm.count 0x7fcbe2f6c190
location: 0
G2.dBZ.stdev[ii][jj][kk][ll][mm] = 2.001000
Address of grids->G2.dBZm.count 0x7fcbe2f6c190
assigned G2.dBZm.count
assigend G2.dBZm.mean
assigned G2.dBZm.stdev
Address of G2.d0.count 0x7fca3d301190
Going to assign d0.count
Segmentation fault