BSD 4_2 development

[unix-history] / usr / src / sys / h / trace.h

/*      trace.h 6.1     83/07/29        */

/*
* File system buffer tracing points; all trace <dev, bn>
*/
#define TR_BREADHIT     0       /* buffer read found in cache */
#define TR_BREADMISS    1       /* buffer read not in cache */
#define TR_BWRITE       2       /* buffer written */
#define TR_BREADHITRA   3       /* buffer read-ahead found in cache */
#define TR_BREADMISSRA  4       /* buffer read-ahead not in cache */
#define TR_XFODMISS     5       /* exe fod read */
#define TR_XFODHIT      6       /* exe fod read */
#define TR_BRELSE       7       /* brelse */

/*
* Memory allocator trace points; all trace the amount of memory involved
*/
#define TR_MALL         10      /* memory allocated */

/*
* Paging trace points: all are <vaddr, pid>
*/
#define TR_INTRANS      20      /* page intransit block */
#define TR_EINTRANS     21      /* page intransit wait done */
#define TR_FRECLAIM     22      /* reclaim from free list */
#define TR_RECLAIM      23      /* reclaim from loop */
#define TR_XSFREC       24      /* reclaim from free list instead of drum */
#define TR_XIFREC       25      /* reclaim from free list instead of fsys */
#define TR_WAITMEM      26      /* wait for memory in pagein */
#define TR_EWAITMEM     27      /* end memory wait in pagein */
#define TR_ZFOD         28      /* zfod page fault */
#define TR_EXFOD        29      /* exec fod page fault */
#define TR_VRFOD        30      /* vread fod page fault */
#define TR_CACHEFOD     31      /* fod in file system cache */
#define TR_SWAPIN       32      /* drum page fault */
#define TR_PGINDONE     33      /* page in done */
#define TR_SWAPIO       34      /* swap i/o request arrives */

/*
* System call trace points.
*/
#define TR_VADVISE      40      /* vadvise occurred with <arg, pid> */

/*
* Miscellaneous
*/
#define TR_STAMP        50      /* user said vtrace(VTR_STAMP, value); */

/*
* This defines the size of the trace flags array.
*/
#define TR_NFLAGS       100     /* generous */

#define TRCSIZ          4096

/*
* Specifications of the vtrace() system call, which takes one argument.
*/
#define VTRACE          64+51

#define VTR_DISABLE     0               /* set a trace flag to 0 */
#define VTR_ENABLE      1               /* set a trace flag to 1 */
#define VTR_VALUE       2               /* return value of a trace flag */
#define VTR_UALARM      3               /* set alarm to go off (sig 16) */
                                       /* in specified number of hz */
#define VTR_STAMP       4               /* user specified stamp */
#ifdef KERNEL
#ifdef TRACE
char    traceflags[TR_NFLAGS];
struct  proc *traceproc;
int     tracebuf[TRCSIZ];
unsigned tracex;
int     tracewhich;
#define trace(a,b,c)    if (traceflags[a]) trace1(a,b,c)
#else
#define trace(a,b,b)    ;
#endif
#endif