https://community.intel.com/t5/Intel-Moderncode-for-Parallel/ifort-OpenMP-memory-usage-too-big/m-p/914397#M4767 <BR /> I am porting a program written in Fortran 77 (OpenMP) from<BR /> IRIX64-MIPSPRO to Linux/SUSE-ia64-ifort. I should<BR /> probably provide a lot more background, but at this stage<BR /> I am just trying to see if I might be able to get some help,<BR /> or even if this is the right place for such inquiry.<BR /> <BR /> All tests are fine but I am far from being able to use<BR /> the 32GB that are installed on the machine. In fact, in<BR /> an exactly similar configuration the IRIX64 application<BR /> uses less than half the memory claimed by the Altix<BR /> box (14gb on IRIX64, 31gb on altix.)<BR /> <BR /> I have checked all likely sources of discrepencies in<BR /> the compilation stage (type representation, antomatic<BR /> variables.)<BR /> <BR /> Any ideas?<BR /> <BR /> Thank you in advance.<BR /> <BR /> top (on altix)<BR /> =========<BR /> Mem: 31908672k total, 31856992k used, 51680k free, 0k buffers<BR /> Swap: 10239968k total, 480k used, 10239488k free, 27158400k cached<BR /> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ <BR /> COMMAND <BR /> 4697 tischke 25 0 31.9g 3.4g 7232 R 399 11.1 27:09.49 myapp <BR /> <BR /> top (on irix)<BR /> =========<BR /> IRIX64 6.5 IP27 load averages: 15.33 15.08 14.82 10:04:15<BR /> 127 processes: 108 sleeping, 2 stopped, 17 running<BR /> 32 CPUs: 51.1% idle, 45.6% usr, 0.6% ker, 2.5% wait, 0.0% xbrk, 0.2% intr<BR /> Memory: 20G max, 19G avail, 16G free, 3072M swap, 3072M free swap<BR /> PID PGRP USERNAME PRI SIZE RES STATE TIME WCPU% CPU% COMMAND<BR /> 75532 75528 tischke 20 14G 893M run/18 0:24 74.1 38.42 myapp<BR /> <BR /> <BR /> Wed, 09 Aug 2006 08:06:26 GMT tischke 2006-08-09T08:06:26Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/ifort-OpenMP-memory-usage-too-big/m-p/914397#M4767 <BR /> I am porting a program written in Fortran 77 (OpenMP) from<BR /> IRIX64-MIPSPRO to Linux/SUSE-ia64-ifort. I should<BR /> probably provide a lot more background, but at this stage<BR /> I am just trying to see if I might be able to get some help,<BR /> or even if this is the right place for such inquiry.<BR /> <BR /> All tests are fine but I am far from being able to use<BR /> the 32GB that are installed on the machine. In fact, in<BR /> an exactly similar configuration the IRIX64 application<BR /> uses less than half the memory claimed by the Altix<BR /> box (14gb on IRIX64, 31gb on altix.)<BR /> <BR /> I have checked all likely sources of discrepencies in<BR /> the compilation stage (type representation, antomatic<BR /> variables.)<BR /> <BR /> Any ideas?<BR /> <BR /> Thank you in advance.<BR /> <BR /> top (on altix)<BR /> =========<BR /> Mem: 31908672k total, 31856992k used, 51680k free, 0k buffers<BR /> Swap: 10239968k total, 480k used, 10239488k free, 27158400k cached<BR /> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ <BR /> COMMAND <BR /> 4697 tischke 25 0 31.9g 3.4g 7232 R 399 11.1 27:09.49 myapp <BR /> <BR /> top (on irix)<BR /> =========<BR /> IRIX64 6.5 IP27 load averages: 15.33 15.08 14.82 10:04:15<BR /> 127 processes: 108 sleeping, 2 stopped, 17 running<BR /> 32 CPUs: 51.1% idle, 45.6% usr, 0.6% ker, 2.5% wait, 0.0% xbrk, 0.2% intr<BR /> Memory: 20G max, 19G avail, 16G free, 3072M swap, 3072M free swap<BR /> PID PGRP USERNAME PRI SIZE RES STATE TIME WCPU% CPU% COMMAND<BR /> 75532 75528 tischke 20 14G 893M run/18 0:24 74.1 38.42 myapp<BR /> <BR /> <BR /> Wed, 09 Aug 2006 08:06:26 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/ifort-OpenMP-memory-usage-too-big/m-p/914397#M4767 tischke 2006-08-09T08:06:26Z