rtinst/src/traceio.h

   1 /*
   2  * traceio.h
   3  *
   4  * This file is part of the real-time instrumentation.  The TRACE
   5  * macro gets called to buffer performance data on the nodes until it
   6  * gets sucked out * asynchronously.
   7  *
   8  * $Log: traceio.h,v $
   9  * Revision 1.3  1995/12/05 03:25:32  zhichen
  10  * I fixed the bug the the marco TRACE update TRACELIBcurrPtr even though
  11  * the buffer is already filled up. (The consequence is a PN bus error)
  12  *
  13  * Revision 1.2  1994/07/11  22:47:54  jcargill
  14  * Major CM5 commit: include syntax changes, some timer changes, removal
  15  * of old aggregation code, old pause code, added signal-driven sampling
  16  * within node processes
  17  *
  18  */
  19
  20 #define TRACE_BUF_SIZE   65535
  21
  22 #define TRACE(dataPtr, dataLen)                         \
  23   do {                                                  \
  24         TRACELIBmustRetry = 0;                          \
  25         TRACELIBcurrPtr = TRACELIBfreePtr;              \
  26         TRACELIBfreePtr += dataLen;                     \
  27         if (TRACELIBendPtr < TRACELIBfreePtr) {         \
  28             must_end_timeslice();                       \
  29             TRACELIBfreePtr -= dataLen;                 \
  30             continue;     /* go back and try again */   \
  31         }                                               \
  32         bcopy (dataPtr, TRACELIBcurrPtr, dataLen);      \
  33   } while (TRACELIBmustRetry);
  34
  35 /********************************************************
  36  * IT IS USED TO BE AS FOLLOWS,                         *
  37  * I CHANGED IT TO GET RID OF A pn bUS ERROR            *
  38  ********************************************************/
  39 /*
  40 #define TRACE(dataPtr, dataLen)                         \
  41   do {                                                  \
  42         TRACELIBmustRetry = 0;                          \
  43         TRACELIBcurrPtr = TRACELIBfreePtr;              \
  44         TRACELIBfreePtr += dataLen;                     \
  45         if (TRACELIBendPtr < TRACELIBfreePtr) {         \
  46             must_end_timeslice();                       \
  47             continue;      * go back and try again *    \
  48         }                                               \
  49         bcopy (dataPtr, TRACELIBcurrPtr, dataLen);      \
  50         TRACELIBcurrPtr = TRACELIBfreePtr;              \
  51   } while (TRACELIBmustRetry);
  52 */
  53
  54 extern char *TRACELIBcurrPtr;      /* current pointer in buffer  */
  55 extern char *TRACELIBfreePtr;      /* pointer to next free byte in buffer */
  56 extern char *TRACELIBendPtr;       /* last byte in trace buffer */
  57 extern char *TRACELIBtraceBuffer;  /* beginning of trace buffer */
  58 extern int TRACELIBmustRetry;      /* signal variable from consumer -> producer */
  59                                    /* or to put it another way, */
  60                                    /* Handler -> Trace macro */
  61