FreeBSD/Linux Kernel Cross Reference
sys/sys/evcnt.h

     /*      $NetBSD: evcnt.h,v 1.5 2007/12/16 20:45:59 dyoung Exp $ */
     
     /*
      * Copyright (c) 1996, 2000 Christopher G. Demetriou
      * 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 for the
     *          NetBSD Project.  See http://www.NetBSD.org/ for
     *          information about NetBSD.
     * 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.
     *
     * --(license Id: LICENSE.proto,v 1.1 2000/06/13 21:40:26 cgd Exp )--
     */
    
    /*
     * Copyright (c) 1992, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * This software was developed by the Computer Systems Engineering group
     * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     * contributed to Berkeley.
     *
     * All advertising materials mentioning features or use of this software
     * must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Lawrence Berkeley Laboratories.
     *
     * 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. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
     */
    
    #ifndef _SYS_EVCNT_H_
    #define _SYS_EVCNT_H_
    
    #include <sys/queue.h>
    #include <sys/stdint.h>
    
    /*
     * event counters
     */
    
    struct evcnt {
            uint64_t        ev_count;       /* how many have occurred */
            TAILQ_ENTRY(evcnt) ev_list;     /* entry on list of all counters */
            unsigned char   ev_type;        /* counter type; see below */
            unsigned char   ev_grouplen;    /* 'group' len, excluding NUL */
            unsigned char   ev_namelen;     /* 'name' len, excluding NUL */
            char            ev_pad1;        /* reserved (for now); 0 */
            const struct evcnt *ev_parent;  /* parent, for hierarchical ctrs */
            const char      *ev_group;      /* name of group */
            const char      *ev_name;       /* name of specific event */
    };
    TAILQ_HEAD(evcntlist, evcnt);
    
    /* maximum group/name lengths, including trailing NUL */
    #define EVCNT_STRING_MAX        256
   
   /* ev_type values */
   #define EVCNT_TYPE_MISC         0       /* miscellaneous; catch all */
   #define EVCNT_TYPE_INTR         1       /* interrupt; count with vmstat -i */
   #define EVCNT_TYPE_TRAP         2       /* processor trap/execption */
   
   /*
    * initializer for an event count structure.  the lengths are initted and
    * it is added to the evcnt list at attach time.
    */
   #define EVCNT_INITIALIZER(type, parent, group, name)    \
       {                                                   \
           .ev_type = type,                                \
           .ev_parent = parent,                            \
           .ev_group = group,                              \
           .ev_name = name,                                \
       }
   
   /*
    * Attach a static event counter.  This uses a link set to do the work.
    * NOTE: "ev" should not be a pointer to the object, but rather a direct
    * reference to the object itself.
    */
   #define EVCNT_ATTACH_STATIC(ev)         __link_set_add_data(evcnts, ev)
   #define EVCNT_ATTACH_STATIC2(ev, n)     __link_set_add_data2(evcnts, ev, n)
   
   #ifdef _KERNEL
   
   extern struct evcntlist allevents;      /* list of all event counters */
   
   void    evcnt_init(void);
   void    evcnt_attach_static(struct evcnt *);
   void    evcnt_attach_dynamic(struct evcnt *, int, const struct evcnt *,
               const char *, const char *);
   void    evcnt_detach(struct evcnt *);
   
   #ifdef DDB
   void    event_print(int, void (*)(const char *, ...));
   #endif
   #endif /* _KERNEL */
   
   #endif /* !_SYS_EVCNT_H_ */

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