Hello, I am trying to run a demanding quantum chemistry program on a cluster of multiprocessor machines. Each machine has 2 dual-core opterons and 16Gb of RAM, and is running a 64 bit kernel (currently 2.6.26) and userspace (lenny) system. Interprocess communications among processes on the same node go via shared memory (a lot of it), hence I need to set it to the maximum possible.
Can somebody tell me what are the maximum supported values for shmmax, shmmni and shmall (I know I can set them via /proc/sys/kernel pseudofiles) or (even better!) tell me how I can calculate them? Is it likely that a too large value of shmmax or the other two can cause applications to segfault? Thanks in advance, Giacomo Mulas -- _________________________________________________________________ Giacomo Mulas <[email protected]> _________________________________________________________________ OSSERVATORIO ASTRONOMICO DI CAGLIARI Str. 54, Loc. Poggio dei Pini * 09012 Capoterra (CA) Tel. (OAC): +39 070 71180 248 Fax : +39 070 71180 222 Tel. (UNICA): +39 070 675 4916 _________________________________________________________________ "When the storms are raging around you, stay right where you are" (Freddy Mercury) _________________________________________________________________ -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
