FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_stat.h

     /*      $NetBSD: uvm_stat.h,v 1.44 2008/08/08 17:09:28 skrll Exp $      */
     
     /*
      *
      * Copyright (c) 1997 Charles D. Cranor and Washington University.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Charles D. Cranor and
     *      Washington University.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * from: Id: uvm_stat.h,v 1.1.2.4 1998/02/07 01:16:56 chs Exp
     */
    
    #ifndef _UVM_UVM_STAT_H_
    #define _UVM_UVM_STAT_H_
    
    #if defined(_KERNEL_OPT)
    #include "opt_uvmhist.h"
    #endif
    
    #include <sys/queue.h>
    #ifdef UVMHIST
    #include <sys/cpu.h>
    #include <sys/malloc.h>
    #endif
    
    /*
     * uvm_stat: monitor what is going on with uvm (or whatever)
     */
    
    /*
     * history/tracing
     */
    
    struct uvm_history_ent {
            struct timeval tv;              /* time stamp */
            int cpunum;
            const char *fmt;                /* printf format */
            size_t fmtlen;                  /* length of printf format */
            const char *fn;                 /* function name */
            size_t fnlen;                   /* length of function name */
            u_long call;                    /* function call number */
            u_long v[4];                    /* values */
    };
    
    struct uvm_history {
            const char *name;               /* name of this history */
            size_t namelen;                 /* length of name, not including null */
            LIST_ENTRY(uvm_history) list;   /* link on list of all histories */
            int n;                          /* number of entries */
            int f;                          /* next free one */
            int unused;                     /* old location of lock */
            struct uvm_history_ent *e;      /* the malloc'd entries */
            kmutex_t l;                     /* lock on this history */
    };
    
    LIST_HEAD(uvm_history_head, uvm_history);
    
    /*
     * grovelling lists all at once.  we currently do not allow more than
     * 32 histories to exist, as the way to dump a number of them at once
     * is by calling uvm_hist() with a bitmask.
     */
    
    /* this is used to set the size of some arrays */
    #define MAXHISTS                32      /* do not change this! */
    
    /* and these are the bit values of each history */
    #define UVMHIST_MAPHIST         0x00000001      /* maphist */
    #define UVMHIST_PDHIST          0x00000002      /* pdhist */
    #define UVMHIST_UBCHIST         0x00000004      /* ubchist */
    #define UVMHIST_LOANHIST        0x00000008      /* loanhist */
    
    #ifdef _KERNEL
    
    /*
    * macros to use the history/tracing code.  note that UVMHIST_LOG
    * must take 4 arguments (even if they are ignored by the format).
    */
   #ifndef UVMHIST
   #define UVMHIST_DECL(NAME)
   #define UVMHIST_INIT(NAME,N)
   #define UVMHIST_INIT_STATIC(NAME,BUF)
   #define UVMHIST_LOG(NAME,FMT,A,B,C,D)
   #define UVMHIST_CALLED(NAME)
   #define UVMHIST_FUNC(FNAME)
   #define uvmhist_dump(NAME)
   #else
   #include <sys/kernel.h>         /* for "cold" variable */
   
   extern  struct uvm_history_head uvm_histories;
   
   #define UVMHIST_DECL(NAME) struct uvm_history NAME
   
   #define UVMHIST_INIT(NAME,N) \
   do { \
           (NAME).name = __STRING(NAME); \
           (NAME).namelen = strlen(__STRING(NAME)); \
           (NAME).n = (N); \
           (NAME).f = 0; \
           mutex_init(&(NAME).l, MUTEX_SPIN, IPL_HIGH); \
           (NAME).e = (struct uvm_history_ent *) \
                   malloc(sizeof(struct uvm_history_ent) * (N), M_TEMP, \
                       M_WAITOK); \
           memset((NAME).e, 0, sizeof(struct uvm_history_ent) * (N)); \
           LIST_INSERT_HEAD(&uvm_histories, &(NAME), list); \
   } while (/*CONSTCOND*/ 0)
   
   #define UVMHIST_INIT_STATIC(NAME,BUF) \
   do { \
           (NAME).name = __STRING(NAME); \
           (NAME).namelen = strlen(__STRING(NAME)); \
           (NAME).n = sizeof(BUF) / sizeof(struct uvm_history_ent); \
           (NAME).f = 0; \
           mutex_init(&(NAME).l, MUTEX_SPIN, IPL_HIGH); \
           (NAME).e = (struct uvm_history_ent *) (BUF); \
           memset((NAME).e, 0, sizeof(struct uvm_history_ent) * (NAME).n); \
           LIST_INSERT_HEAD(&uvm_histories, &(NAME), list); \
   } while (/*CONSTCOND*/ 0)
   
   #if defined(UVMHIST_PRINT)
   extern int uvmhist_print_enabled;
   #define UVMHIST_PRINTNOW(E) \
   do { \
                   if (uvmhist_print_enabled) { \
                           uvmhist_entry_print(E); \
                           DELAY(100000); \
                   } \
   } while (/*CONSTCOND*/ 0)
   #else
   #define UVMHIST_PRINTNOW(E) /* nothing */
   #endif
   
   #define UVMHIST_LOG(NAME,FMT,A,B,C,D) \
   do { \
           int _i_; \
           mutex_enter(&(NAME).l); \
           _i_ = (NAME).f; \
           (NAME).f = (_i_ + 1 < (NAME).n) ? _i_ + 1 : 0; \
           mutex_exit(&(NAME).l); \
           if (!cold) \
                   microtime(&(NAME).e[_i_].tv); \
           (NAME).e[_i_].cpunum = cpu_number(); \
           (NAME).e[_i_].fmt = (FMT); \
           (NAME).e[_i_].fmtlen = strlen(FMT); \
           (NAME).e[_i_].fn = _uvmhist_name; \
           (NAME).e[_i_].fnlen = strlen(_uvmhist_name); \
           (NAME).e[_i_].call = _uvmhist_call; \
           (NAME).e[_i_].v[0] = (u_long)(A); \
           (NAME).e[_i_].v[1] = (u_long)(B); \
           (NAME).e[_i_].v[2] = (u_long)(C); \
           (NAME).e[_i_].v[3] = (u_long)(D); \
           UVMHIST_PRINTNOW(&((NAME).e[_i_])); \
   } while (/*CONSTCOND*/ 0)
   
   #define UVMHIST_CALLED(NAME) \
   do { \
           { \
                   mutex_enter(&(NAME).l); \
                   _uvmhist_call = _uvmhist_cnt++; \
                   mutex_exit(&(NAME).l); \
           } \
           UVMHIST_LOG(NAME,"called!", 0, 0, 0, 0); \
   } while (/*CONSTCOND*/ 0)
   
   #define UVMHIST_FUNC(FNAME) \
           static int _uvmhist_cnt = 0; \
           static const char *const _uvmhist_name = FNAME; \
           int _uvmhist_call;
   
   static __inline void uvmhist_entry_print(struct uvm_history_ent *);
   
   static __inline void
   uvmhist_entry_print(e)
           struct uvm_history_ent *e;
   {
           printf("%06ld.%06ld ", e->tv.tv_sec, e->tv.tv_usec);
           printf("%s#%ld@%d: ", e->fn, e->call, e->cpunum);
           printf(e->fmt, e->v[0], e->v[1], e->v[2], e->v[3]);
           printf("\n");
   }
   #endif /* UVMHIST */
   
   #endif /* _KERNEL */
   
   #endif /* _UVM_UVM_STAT_H_ */

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