apps/kinfocenter/memory/memory_tru64.cpp

   1 /*
   2  * This is memory_tru64.cpp to retrieve memory information under Tru64/Alpha.
   3  *
   4  * Implemented by Tom Leitner, Tom@radar.tu-graz.ac.at
   5  *
   6  * WARNING: This module requires linking with -lmach
   7  *
   8  * This routine is based on m_decosf1.c from the "top" program written by:
   9  *
  10  * AUTHOR:  Anthony Baxter, <anthony@aaii.oz.au>
  11  *
  12  */
  13
  14 #include <stdio.h>
  15 #include <unistd.h>
  16 #include <sys/socket.h>
  17 #include <sys/mbuf.h>
  18 #include <net/route.h>
  19 #include <sys/table.h>
  20 extern "C" {
  21 #include <mach/mach_traps.h>
  22 }
  23 #include <mach/vm_statistics.h>
  24
  25 #define pagetob(size) (MEMORY(1024L) * ((long) (size) << (long) pageshift))
  26 #define LOG1024       10
  27
  28 extern "C" void vm_statistics(task_t, vm_statistics_data_t*);
  29
  30 void KCMMemory::fetchValues()
  31 {
  32   int pageshift;          /* log base 2 of the pagesize */
  33   register int pagesize;
  34   vm_statistics_data_t vmstats;
  35   int swap_pages=0,swap_free=0,i;
  36   struct tbl_swapinfo swbuf;
  37
  38   /* get the page size with "getpagesize" and calculate pageshift from it */
  39
  40   pagesize = getpagesize();
  41   pageshift = 0;
  42   while (pagesize > 1) {
  43       pageshift++;
  44       pagesize >>= 1;
  45   }
  46
  47   /* we only need the amount of log(2)1024 for our conversion */
  48
  49   pageshift -= LOG1024;
  50
  51   /* memory information */
  52   /* this is possibly bogus - we work out total # pages by */
  53   /* adding up the free, active, inactive, wired down, and */
  54   /* zero filled. Anyone who knows a better way, TELL ME!  */
  55   /* Change: don't use zero filled. */
  56
  57   (void) ::vm_statistics(::task_self(), &vmstats);
  58
  59   /* thanks DEC for the table() command. No thanks at all for   */
  60   /* omitting the man page for it from OSF/1 1.2, and failing   */
  61   /* to document SWAPINFO in the 1.3 man page. Lets hear it for */
  62   /* include files. */
  63
  64   i=0;
  65   while(table(TBL_SWAPINFO,i,&swbuf,1,sizeof(struct tbl_swapinfo))>0) {
  66       swap_pages += swbuf.size;
  67       swap_free  += swbuf.free;
  68       i++;
  69   }
  70   memoryInfos[TOTAL_MEM]    = pagetob((vmstats.free_count +
  71                                        vmstats.active_count +
  72                                        vmstats.inactive_count +
  73                                        vmstats.wire_count));
  74   memoryInfos[FREE_MEM]     = pagetob(vmstats.free_count);
  75   memoryInfos[SHARED_MEM]   = NO_MEMORY_INFO;               /* FIXME ?? */
  76   memoryInfos[BUFFER_MEM]   = NO_MEMORY_INFO;               /* FIXME ?? */
  77 #ifdef __GNUC__
  78 #warning "FIXME: memoryInfos[CACHED_MEM]"
  79 #endif
  80   memoryInfos[CACHED_MEM]   = NO_MEMORY_INFO; /* cached memory in ram */
  81   memoryInfos[SWAP_MEM]     = pagetob(swap_pages);
  82   memoryInfos[FREESWAP_MEM] = pagetob(swap_free);
  83 }