sys/uvm/uvm_stat.h

   1 /*      $NetBSD: uvm_stat.h,v 1.44 2008/08/08 17:09:28 skrll Exp $      */
   2
   3 /*
   4  *
   5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Charles D. Cranor and
  19  *      Washington University.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * from: Id: uvm_stat.h,v 1.1.2.4 1998/02/07 01:16:56 chs Exp
  35  */
  36
  37 #ifndef _UVM_UVM_STAT_H_
  38 #define _UVM_UVM_STAT_H_
  39
  40 #if defined(_KERNEL_OPT)
  41 #include "opt_uvmhist.h"
  42 #endif
  43
  44 #include <sys/queue.h>
  45 #ifdef UVMHIST
  46 #include <sys/cpu.h>
  47 #include <sys/malloc.h>
  48 #endif
  49
  50 /*
  51  * uvm_stat: monitor what is going on with uvm (or whatever)
  52  */
  53
  54 /*
  55  * history/tracing
  56  */
  57
  58 struct uvm_history_ent {
  59         struct timeval tv;              /* time stamp */
  60         int cpunum;
  61         const char *fmt;                /* printf format */
  62         size_t fmtlen;                  /* length of printf format */
  63         const char *fn;                 /* function name */
  64         size_t fnlen;                   /* length of function name */
  65         u_long call;                    /* function call number */
  66         u_long v[4];                    /* values */
  67 };
  68
  69 struct uvm_history {
  70         const char *name;               /* name of this history */
  71         size_t namelen;                 /* length of name, not including null */
  72         LIST_ENTRY(uvm_history) list;   /* link on list of all histories */
  73         int n;                          /* number of entries */
  74         int f;                          /* next free one */
  75         int unused;                     /* old location of lock */
  76         struct uvm_history_ent *e;      /* the malloc'd entries */
  77         kmutex_t l;                     /* lock on this history */
  78 };
  79
  80 LIST_HEAD(uvm_history_head, uvm_history);
  81
  82 /*
  83  * grovelling lists all at once.  we currently do not allow more than
  84  * 32 histories to exist, as the way to dump a number of them at once
  85  * is by calling uvm_hist() with a bitmask.
  86  */
  87
  88 /* this is used to set the size of some arrays */
  89 #define MAXHISTS                32      /* do not change this! */
  90
  91 /* and these are the bit values of each history */
  92 #define UVMHIST_MAPHIST         0x00000001      /* maphist */
  93 #define UVMHIST_PDHIST          0x00000002      /* pdhist */
  94 #define UVMHIST_UBCHIST         0x00000004      /* ubchist */
  95 #define UVMHIST_LOANHIST        0x00000008      /* loanhist */
  96
  97 #ifdef _KERNEL
  98
  99 /*
 100  * macros to use the history/tracing code.  note that UVMHIST_LOG
 101  * must take 4 arguments (even if they are ignored by the format).
 102  */
 103 #ifndef UVMHIST
 104 #define UVMHIST_DECL(NAME)
 105 #define UVMHIST_INIT(NAME,N)
 106 #define UVMHIST_INIT_STATIC(NAME,BUF)
 107 #define UVMHIST_LOG(NAME,FMT,A,B,C,D)
 108 #define UVMHIST_CALLED(NAME)
 109 #define UVMHIST_FUNC(FNAME)
 110 #define uvmhist_dump(NAME)
 111 #else
 112 #include <sys/kernel.h>         /* for "cold" variable */
 113
 114 extern  struct uvm_history_head uvm_histories;
 115
 116 #define UVMHIST_DECL(NAME) struct uvm_history NAME
 117
 118 #define UVMHIST_INIT(NAME,N) \
 119 do { \
 120         (NAME).name = __STRING(NAME); \
 121         (NAME).namelen = strlen(__STRING(NAME)); \
 122         (NAME).n = (N); \
 123         (NAME).f = 0; \
 124         mutex_init(&(NAME).l, MUTEX_SPIN, IPL_HIGH); \
 125         (NAME).e = (struct uvm_history_ent *) \
 126                 malloc(sizeof(struct uvm_history_ent) * (N), M_TEMP, \
 127                     M_WAITOK); \
 128         memset((NAME).e, 0, sizeof(struct uvm_history_ent) * (N)); \
 129         LIST_INSERT_HEAD(&uvm_histories, &(NAME), list); \
 130 } while (/*CONSTCOND*/ 0)
 131
 132 #define UVMHIST_INIT_STATIC(NAME,BUF) \
 133 do { \
 134         (NAME).name = __STRING(NAME); \
 135         (NAME).namelen = strlen(__STRING(NAME)); \
 136         (NAME).n = sizeof(BUF) / sizeof(struct uvm_history_ent); \
 137         (NAME).f = 0; \
 138         mutex_init(&(NAME).l, MUTEX_SPIN, IPL_HIGH); \
 139         (NAME).e = (struct uvm_history_ent *) (BUF); \
 140         memset((NAME).e, 0, sizeof(struct uvm_history_ent) * (NAME).n); \
 141         LIST_INSERT_HEAD(&uvm_histories, &(NAME), list); \
 142 } while (/*CONSTCOND*/ 0)
 143
 144 #if defined(UVMHIST_PRINT)
 145 extern int uvmhist_print_enabled;
 146 #define UVMHIST_PRINTNOW(E) \
 147 do { \
 148                 if (uvmhist_print_enabled) { \
 149                         uvmhist_entry_print(E); \
 150                         DELAY(100000); \
 151                 } \
 152 } while (/*CONSTCOND*/ 0)
 153 #else
 154 #define UVMHIST_PRINTNOW(E) /* nothing */
 155 #endif
 156
 157 #define UVMHIST_LOG(NAME,FMT,A,B,C,D) \
 158 do { \
 159         int _i_; \
 160         mutex_enter(&(NAME).l); \
 161         _i_ = (NAME).f; \
 162         (NAME).f = (_i_ + 1 < (NAME).n) ? _i_ + 1 : 0; \
 163         mutex_exit(&(NAME).l); \
 164         if (!cold) \
 165                 microtime(&(NAME).e[_i_].tv); \
 166         (NAME).e[_i_].cpunum = cpu_number(); \
 167         (NAME).e[_i_].fmt = (FMT); \
 168         (NAME).e[_i_].fmtlen = strlen(FMT); \
 169         (NAME).e[_i_].fn = _uvmhist_name; \
 170         (NAME).e[_i_].fnlen = strlen(_uvmhist_name); \
 171         (NAME).e[_i_].call = _uvmhist_call; \
 172         (NAME).e[_i_].v[0] = (u_long)(A); \
 173         (NAME).e[_i_].v[1] = (u_long)(B); \
 174         (NAME).e[_i_].v[2] = (u_long)(C); \
 175         (NAME).e[_i_].v[3] = (u_long)(D); \
 176         UVMHIST_PRINTNOW(&((NAME).e[_i_])); \
 177 } while (/*CONSTCOND*/ 0)
 178
 179 #define UVMHIST_CALLED(NAME) \
 180 do { \
 181         { \
 182                 mutex_enter(&(NAME).l); \
 183                 _uvmhist_call = _uvmhist_cnt++; \
 184                 mutex_exit(&(NAME).l); \
 185         } \
 186         UVMHIST_LOG(NAME,"called!", 0, 0, 0, 0); \
 187 } while (/*CONSTCOND*/ 0)
 188
 189 #define UVMHIST_FUNC(FNAME) \
 190         static int _uvmhist_cnt = 0; \
 191         static const char *const _uvmhist_name = FNAME; \
 192         int _uvmhist_call;
 193
 194 static __inline void uvmhist_entry_print(struct uvm_history_ent *);
 195
 196 static __inline void
 197 uvmhist_entry_print(e)
 198         struct uvm_history_ent *e;
 199 {
 200         printf("%06" PRIu64 ".%06d ", e->tv.tv_sec, e->tv.tv_usec);
 201         printf("%s#%ld@%d: ", e->fn, e->call, e->cpunum);
 202         printf(e->fmt, e->v[0], e->v[1], e->v[2], e->v[3]);
 203         printf("\n");
 204 }
 205 #endif /* UVMHIST */
 206
 207 #endif /* _KERNEL */
 208
 209 #endif /* _UVM_UVM_STAT_H_ */