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Annotation of Net2/sys/trace.h, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1982, 1986 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)trace.h     7.6 (Berkeley) 5/5/91
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * File system buffer tracing points; all trace <pack(dev, size), bn>
        !            38:  */
        !            39: #define        TR_BREADHIT     0       /* buffer read found in cache */
        !            40: #define        TR_BREADMISS    1       /* buffer read not in cache */
        !            41: #define        TR_BWRITE       2       /* buffer written */
        !            42: #define        TR_BREADHITRA   3       /* buffer read-ahead found in cache */
        !            43: #define        TR_BREADMISSRA  4       /* buffer read-ahead not in cache */
        !            44: #define        TR_XFODMISS     5       /* exe fod read */
        !            45: #define        TR_XFODHIT      6       /* exe fod read */
        !            46: #define        TR_BRELSE       7       /* brelse */
        !            47: #define        TR_BREALLOC     8       /* expand/contract a buffer */
        !            48: 
        !            49: /*
        !            50:  * Memory allocator trace points; all trace the amount of memory involved
        !            51:  */
        !            52: #define        TR_MALL         10      /* memory allocated */
        !            53: 
        !            54: /*
        !            55:  * Paging trace points: all are <vaddr, pid>
        !            56:  */
        !            57: #define        TR_INTRANS      20      /* page intransit block */
        !            58: #define        TR_EINTRANS     21      /* page intransit wait done */
        !            59: #define        TR_FRECLAIM     22      /* reclaim from free list */
        !            60: #define        TR_RECLAIM      23      /* reclaim from loop */
        !            61: #define        TR_XSFREC       24      /* reclaim from free list instead of drum */
        !            62: #define        TR_XIFREC       25      /* reclaim from free list instead of fsys */
        !            63: #define        TR_WAITMEM      26      /* wait for memory in pagein */
        !            64: #define        TR_EWAITMEM     27      /* end memory wait in pagein */
        !            65: #define        TR_ZFOD         28      /* zfod page fault */
        !            66: #define        TR_EXFOD        29      /* exec fod page fault */
        !            67: #define        TR_VRFOD        30      /* vread fod page fault */
        !            68: #define        TR_CACHEFOD     31      /* fod in file system cache */
        !            69: #define        TR_SWAPIN       32      /* drum page fault */
        !            70: #define        TR_PGINDONE     33      /* page in done */
        !            71: #define        TR_SWAPIO       34      /* swap i/o request arrives */
        !            72: 
        !            73: /*
        !            74:  * System call trace points.
        !            75:  */
        !            76: #define        TR_VADVISE      40      /* vadvise occurred with <arg, pid> */
        !            77: 
        !            78: /*
        !            79:  * Miscellaneous
        !            80:  */
        !            81: #define        TR_STAMP        45      /* user said vtrace(VTR_STAMP, value); */
        !            82: 
        !            83: /*
        !            84:  * This defines the size of the trace flags array.
        !            85:  */
        !            86: #define        TR_NFLAGS       100     /* generous */
        !            87: 
        !            88: #define        TRCSIZ          4096
        !            89: 
        !            90: /*
        !            91:  * Specifications of the vtrace() system call, which takes one argument.
        !            92:  */
        !            93: #define        VTRACE          64+51
        !            94: 
        !            95: #define        VTR_DISABLE     0               /* set a trace flag to 0 */
        !            96: #define        VTR_ENABLE      1               /* set a trace flag to 1 */
        !            97: #define        VTR_VALUE       2               /* return value of a trace flag */
        !            98: #define        VTR_UALARM      3               /* set alarm to go off (sig 16) */
        !            99:                                        /* in specified number of hz */
        !           100: #define        VTR_STAMP       4               /* user specified stamp */
        !           101: 
        !           102: #ifdef KERNEL
        !           103: #ifdef TRACE
        !           104: char   traceflags[TR_NFLAGS];
        !           105: struct proc *traceproc;
        !           106: int    tracebuf[TRCSIZ];
        !           107: unsigned tracex;
        !           108: int    tracewhich;
        !           109: #define        pack(v,b)       (((v)->v_mount->mnt_stat.f_fsid.val[0])<<16)|(b)
        !           110: #define        trace(a,b,c)    if (traceflags[a]) trace1(a,b,c)
        !           111: #else
        !           112: #define        trace(a,b,c)    ;
        !           113: #endif
        !           114: #endif

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