ac_mem            207 kern/kern_acct.c 		acct.ac_mem = (r->ru_ixrss + r->ru_idrss + r->ru_isrss) / t;
ac_mem            209 kern/kern_acct.c 		acct.ac_mem = 0;
ac_mem             55 sys/acct.h     	u_int16_t ac_mem;	/* average memory usage */