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Annotation of 42BSD/sys/h/trace.h, revision 1.1

1.1     ! root        1: /*     trace.h 6.1     83/07/29        */
        !             2: 
        !             3: /*
        !             4:  * File system buffer tracing points; all trace <dev, bn>
        !             5:  */
        !             6: #define        TR_BREADHIT     0       /* buffer read found in cache */
        !             7: #define        TR_BREADMISS    1       /* buffer read not in cache */
        !             8: #define        TR_BWRITE       2       /* buffer written */
        !             9: #define        TR_BREADHITRA   3       /* buffer read-ahead found in cache */
        !            10: #define        TR_BREADMISSRA  4       /* buffer read-ahead not in cache */
        !            11: #define        TR_XFODMISS     5       /* exe fod read */
        !            12: #define        TR_XFODHIT      6       /* exe fod read */
        !            13: #define        TR_BRELSE       7       /* brelse */
        !            14: 
        !            15: /*
        !            16:  * Memory allocator trace points; all trace the amount of memory involved
        !            17:  */
        !            18: #define        TR_MALL         10      /* memory allocated */
        !            19: 
        !            20: /*
        !            21:  * Paging trace points: all are <vaddr, pid>
        !            22:  */
        !            23: #define        TR_INTRANS      20      /* page intransit block */
        !            24: #define        TR_EINTRANS     21      /* page intransit wait done */
        !            25: #define        TR_FRECLAIM     22      /* reclaim from free list */
        !            26: #define        TR_RECLAIM      23      /* reclaim from loop */
        !            27: #define        TR_XSFREC       24      /* reclaim from free list instead of drum */
        !            28: #define        TR_XIFREC       25      /* reclaim from free list instead of fsys */
        !            29: #define        TR_WAITMEM      26      /* wait for memory in pagein */
        !            30: #define        TR_EWAITMEM     27      /* end memory wait in pagein */
        !            31: #define        TR_ZFOD         28      /* zfod page fault */
        !            32: #define        TR_EXFOD        29      /* exec fod page fault */
        !            33: #define        TR_VRFOD        30      /* vread fod page fault */
        !            34: #define        TR_CACHEFOD     31      /* fod in file system cache */
        !            35: #define        TR_SWAPIN       32      /* drum page fault */
        !            36: #define        TR_PGINDONE     33      /* page in done */
        !            37: #define        TR_SWAPIO       34      /* swap i/o request arrives */
        !            38: 
        !            39: /*
        !            40:  * System call trace points.
        !            41:  */
        !            42: #define        TR_VADVISE      40      /* vadvise occurred with <arg, pid> */
        !            43: 
        !            44: /*
        !            45:  * Miscellaneous
        !            46:  */
        !            47: #define        TR_STAMP        50      /* user said vtrace(VTR_STAMP, value); */
        !            48: 
        !            49: /*
        !            50:  * This defines the size of the trace flags array.
        !            51:  */
        !            52: #define        TR_NFLAGS       100     /* generous */
        !            53: 
        !            54: #define        TRCSIZ          4096
        !            55: 
        !            56: /*
        !            57:  * Specifications of the vtrace() system call, which takes one argument.
        !            58:  */
        !            59: #define        VTRACE          64+51
        !            60: 
        !            61: #define        VTR_DISABLE     0               /* set a trace flag to 0 */
        !            62: #define        VTR_ENABLE      1               /* set a trace flag to 1 */
        !            63: #define        VTR_VALUE       2               /* return value of a trace flag */
        !            64: #define        VTR_UALARM      3               /* set alarm to go off (sig 16) */
        !            65:                                        /* in specified number of hz */
        !            66: #define        VTR_STAMP       4               /* user specified stamp */
        !            67: #ifdef KERNEL
        !            68: #ifdef TRACE
        !            69: char   traceflags[TR_NFLAGS];
        !            70: struct proc *traceproc;
        !            71: int    tracebuf[TRCSIZ];
        !            72: unsigned tracex;
        !            73: int    tracewhich;
        !            74: #define        trace(a,b,c)    if (traceflags[a]) trace1(a,b,c)
        !            75: #else
        !            76: #define        trace(a,b,b)    ;
        !            77: #endif
        !            78: #endif

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