86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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/*
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* File system buffer tracing points; all trace <pack(dev, size), bn>
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*
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* Slipped into 2.10 in about 15 minutes. Bears only a casual
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* relationship to the 4.X code, we just used the same names so
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* someone could do it right if they felt like it. Note that
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* the #defines aren't even sequentially numbered.
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*/
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#define TR_BREADHIT 0 /* buffer read found in cache */
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#define TR_BREADMISS 1 /* buffer read not in cache */
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#define TR_BWRITE 2 /* buffer written */
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#define TR_BREADHITRA 3 /* buffer read-ahead found in cache */
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#define TR_BREADMISSRA 4 /* buffer read-ahead not in cache */
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#define TR_BRELSE 5 /* brelse */
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#define TR_SWAPIO 6 /* swap i/o request arrives */
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#define TR_NUM_210 7 /* size of array for 2.10BSD */
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#define TR_XFODMISS 5 /* exe fod read */
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#define TR_XFODHIT 6 /* exe fod read */
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#define TR_BREALLOC 8 /* expand/contract a buffer */
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/*
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* Memory allocator trace points; all trace the amount of memory involved
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*/
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#define TR_MALL 10 /* memory allocated */
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/*
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* Paging trace points: all are <vaddr, pid>
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*/
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#define TR_INTRANS 20 /* page intransit block */
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#define TR_EINTRANS 21 /* page intransit wait done */
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#define TR_FRECLAIM 22 /* reclaim from free list */
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#define TR_RECLAIM 23 /* reclaim from loop */
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#define TR_XSFREC 24 /* reclaim from free list instead of drum */
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#define TR_XIFREC 25 /* reclaim from free list instead of fsys */
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#define TR_WAITMEM 26 /* wait for memory in pagein */
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#define TR_EWAITMEM 27 /* end memory wait in pagein */
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#define TR_ZFOD 28 /* zfod page fault */
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#define TR_EXFOD 29 /* exec fod page fault */
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#define TR_VRFOD 30 /* vread fod page fault */
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#define TR_CACHEFOD 31 /* fod in file system cache */
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#define TR_SWAPIN 32 /* drum page fault */
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#define TR_PGINDONE 33 /* page in done */
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/*
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* System call trace points.
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*/
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#define TR_VADVISE 40 /* vadvise occurred with <arg, pid> */
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/*
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* Miscellaneous
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*/
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#define TR_STAMP 45 /* user said vtrace(VTR_STAMP, value); */
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/*
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* This defines the size of the trace flags array.
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*/
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#define TR_NFLAGS 100 /* generous */
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#define TRCSIZ 4096
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/*
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* Specifications of the vtrace() system call, which takes one argument.
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*/
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#define VTRACE 64+51
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#define VTR_DISABLE 0 /* set a trace flag to 0 */
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#define VTR_ENABLE 1 /* set a trace flag to 1 */
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#define VTR_VALUE 2 /* return value of a trace flag */
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#define VTR_UALARM 3 /* set alarm to go off (sig 16) */
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/* in specified number of hz */
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#define VTR_STAMP 4 /* user specified stamp */
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#if defined(KERNEL) && defined(UCB_METER)
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u_long tracebuf[TR_NUM_210];
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#define trace(a) tracebuf[a]++;
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#else
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#define trace(a) ;
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#endif
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