The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/trace.h

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    1 /*      $NetBSD: trace.h,v 1.9 2003/08/07 16:34:19 agc Exp $    */
    2 
    3 /*-
    4  * Copyright (c) 1982, 1986, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)trace.h     8.1 (Berkeley) 6/2/93
   32  */
   33 
   34 #ifndef _SYS_TRACE_H_
   35 #define _SYS_TRACE_H_
   36 
   37 /*
   38  * File system buffer tracing points; all trace <pack(dev, size), bn>
   39  */
   40 #define TR_BREADHIT     0       /* buffer read found in cache */
   41 #define TR_BREADMISS    1       /* buffer read not in cache */
   42 #define TR_BWRITE       2       /* buffer written */
   43 #define TR_BREADHITRA   3       /* buffer read-ahead found in cache */
   44 #define TR_BREADMISSRA  4       /* buffer read-ahead not in cache */
   45 #define TR_XFODMISS     5       /* exe fod read */
   46 #define TR_XFODHIT      6       /* exe fod read */
   47 #define TR_BRELSE       7       /* brelse */
   48 #define TR_BREALLOC     8       /* expand/contract a buffer */
   49 
   50 /*
   51  * Memory allocator trace points; all trace the amount of memory involved
   52  */
   53 #define TR_MALL         10      /* memory allocated */
   54 
   55 /*
   56  * Paging trace points: all are <vaddr, pid>
   57  */
   58 #define TR_INTRANS      20      /* page intransit block */
   59 #define TR_EINTRANS     21      /* page intransit wait done */
   60 #define TR_FRECLAIM     22      /* reclaim from free list */
   61 #define TR_RECLAIM      23      /* reclaim from loop */
   62 #define TR_XSFREC       24      /* reclaim from free list instead of drum */
   63 #define TR_XIFREC       25      /* reclaim from free list instead of fsys */
   64 #define TR_WAITMEM      26      /* wait for memory in pagein */
   65 #define TR_EWAITMEM     27      /* end memory wait in pagein */
   66 #define TR_ZFOD         28      /* zfod page fault */
   67 #define TR_EXFOD        29      /* exec fod page fault */
   68 #define TR_VRFOD        30      /* vread fod page fault */
   69 #define TR_CACHEFOD     31      /* fod in file system cache */
   70 #define TR_SWAPIN       32      /* drum page fault */
   71 #define TR_PGINDONE     33      /* page in done */
   72 #define TR_SWAPIO       34      /* swap i/o request arrives */
   73 
   74 /*
   75  * System call trace points.
   76  */
   77 #define TR_VADVISE      40      /* vadvise occurred with <arg, pid> */
   78 
   79 /*
   80  * Miscellaneous
   81  */
   82 #define TR_STAMP        45      /* user said vtrace(VTR_STAMP, value); */
   83 
   84 /*
   85  * This defines the size of the trace flags array.
   86  */
   87 #define TR_NFLAGS       100     /* generous */
   88 
   89 #define TRCSIZ          4096
   90 
   91 /*
   92  * Specifications of the vtrace() system call, which takes one argument.
   93  */
   94 #define VTRACE          64+51
   95 
   96 #define VTR_DISABLE     0               /* set a trace flag to 0 */
   97 #define VTR_ENABLE      1               /* set a trace flag to 1 */
   98 #define VTR_VALUE       2               /* return value of a trace flag */
   99 #define VTR_UALARM      3               /* set alarm to go off (sig 16) */
  100                                         /* in specified number of hz */
  101 #define VTR_STAMP       4               /* user specified stamp */
  102 
  103 #ifdef _KERNEL
  104 #ifdef TRACE
  105 struct  proc *traceproc;
  106 int     tracewhich, tracebuf[TRCSIZ];
  107 u_int   tracex;
  108 char    traceflags[TR_NFLAGS];
  109 #define pack(v,b)       (((v)->v_mount->mnt_stat.f_fsid.val[0])<<16)|(b)
  110 #define trace(a,b,c) {                                                  \
  111         if (traceflags[a])                                              \
  112                 trace1(a,b,c);                                          \
  113 }
  114 #else
  115 #define trace(a,b,c)
  116 #endif /* TRACE */
  117 #endif /* _KERNEL */
  118 
  119 #endif /* !_SYS_TRACE_H_ */

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