1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2008 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #if defined(_UWIN) && defined(_BLD_ast) 23 24 void _STUB_vmstat(){} 25 26 #else 27 28 #include "vmhdr.h" 29 30 /* Get statistics from a region. 31 ** 32 ** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94. 33 */ 34 35 #if __STD_C 36 int vmstat(Vmalloc_t* vm, Vmstat_t* st) 37 #else 38 int vmstat(vm, st) 39 Vmalloc_t* vm; 40 Vmstat_t* st; 41 #endif 42 { 43 reg Seg_t* seg; 44 reg Block_t *b, *endb; 45 reg size_t s = 0; 46 reg Vmdata_t* vd = vm ? vm->data : Vmregion->data; 47 reg int inuse; 48 49 SETINUSE(vd, inuse); 50 if(!st) 51 { CLRINUSE(vd, inuse); 52 return inuse ? 1 : 0; 53 } 54 if(!(vd->mode&VM_TRUST)) 55 { if(ISLOCK(vd,0)) 56 { CLRINUSE(vd, inuse); 57 return -1; 58 } 59 SETLOCK(vd,0); 60 } 61 62 st->n_busy = st->n_free = 0; 63 st->s_busy = st->s_free = st->m_busy = st->m_free = 0; 64 st->n_seg = 0; 65 st->extent = 0; 66 67 if(vd->mode&VM_MTLAST) 68 st->n_busy = 0; 69 else if((vd->mode&VM_MTPOOL) && (s = vd->pool) > 0) 70 { s = ROUND(s,ALIGN); 71 for(b = vd->free; b; b = SEGLINK(b)) 72 st->n_free += 1; 73 } 74 75 for(seg = vd->seg; seg; seg = seg->next) 76 { st->n_seg += 1; 77 st->extent += seg->extent; 78 79 b = SEGBLOCK(seg); 80 endb = BLOCK(seg->baddr); 81 82 if(vd->mode&(VM_MTDEBUG|VM_MTBEST|VM_MTPROFILE)) 83 { while(b < endb) 84 { s = SIZE(b)&~BITS; 85 if(ISJUNK(SIZE(b)) || !ISBUSY(SIZE(b))) 86 { if(s > st->m_free) 87 st->m_free = s; 88 st->s_free += s; 89 st->n_free += 1; 90 } 91 else /* get the real size */ 92 { if(vd->mode&VM_MTDEBUG) 93 s = DBSIZE(DB2DEBUG(DATA(b))); 94 else if(vd->mode&VM_MTPROFILE) 95 s = PFSIZE(DATA(b)); 96 if(s > st->m_busy) 97 st->m_busy = s; 98 st->s_busy += s; 99 st->n_busy += 1; 100 } 101 102 b = (Block_t*)((Vmuchar_t*)DATA(b) + (SIZE(b)&~BITS) ); 103 } 104 } 105 else if(vd->mode&VM_MTLAST) 106 { if((s = seg->free ? (SIZE(seg->free) + sizeof(Head_t)) : 0) > 0) 107 { st->s_free += s; 108 st->n_free += 1; 109 } 110 if((s = ((char*)endb - (char*)b) - s) > 0) 111 { st->s_busy += s; 112 st->n_busy += 1; 113 } 114 } 115 else if((vd->mode&VM_MTPOOL) && s > 0) 116 { if(seg->free) 117 st->n_free += (SIZE(seg->free)+sizeof(Head_t))/s; 118 st->n_busy += ((seg->baddr - (Vmuchar_t*)b) - sizeof(Head_t))/s; 119 } 120 } 121 122 if((vd->mode&VM_MTPOOL) && s > 0) 123 { st->n_busy -= st->n_free; 124 if(st->n_busy > 0) 125 st->s_busy = (st->m_busy = vd->pool)*st->n_busy; 126 if(st->n_free > 0) 127 st->s_free = (st->m_free = vd->pool)*st->n_free; 128 } 129 130 CLRLOCK(vd,0); 131 CLRINUSE(vd, inuse); 132 return inuse ? 1 : 0; 133 } 134 135 #endif 136