sys/kern/subr_syscall_stats.c

   1 /*      $NetBSD: subr_syscall_stats.c,v 1.1 2007/02/18 16:58:16 dsl Exp $       */
   2
   3 /*-
   4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by David Laight.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __RCSID("$NetBSD: subr_syscall_stats.c,v 1.1 2007/02/18 16:58:16 dsl Exp $");
  34
  35 #include "opt_syscall_stats.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/syscall.h>
  39 #include <sys/sysctl.h>
  40
  41 #include <sys/syscall_stats.h>
  42
  43 #ifdef SYSCALL_STATS
  44 uint64_t syscall_counts[SYS_NSYSENT];
  45 uint64_t syscall_count_user, syscall_count_system, syscall_count_interrupt;
  46
  47 #ifdef SYSCALL_TIMES
  48 uint64_t syscall_times[SYS_NSYSENT];
  49 #endif
  50
  51 SYSCTL_SETUP(sysctl_syscall_setup, "sysctl system call stats")
  52 {
  53         const struct sysctlnode *cnode;
  54         int kern_syscalls;
  55
  56         sysctl_createv(clog, 0, NULL, NULL,
  57                         CTLFLAG_PERMANENT,
  58                         CTLTYPE_NODE, "kern", NULL,
  59                         NULL, 0, NULL, 0,
  60                         CTL_KERN, CTL_EOL);
  61         sysctl_createv(clog, 0, NULL, &cnode,
  62                         CTLFLAG_PERMANENT,
  63                         CTLTYPE_NODE, "syscalls",
  64                         SYSCTL_DESCR("per syscall statistics"),
  65                         NULL, 0, NULL, 0,
  66                         CTL_KERN, CTL_CREATE);
  67         kern_syscalls = cnode->sysctl_num;
  68         sysctl_createv(clog, 0, NULL, NULL,
  69                         CTLFLAG_PERMANENT,
  70                         CTLTYPE_STRUCT, "counts",
  71                         SYSCTL_DESCR("per syscall counts"),
  72                         NULL, 0, syscall_counts, sizeof syscall_counts,
  73                         CTL_KERN, kern_syscalls, CTL_CREATE);
  74 #ifdef SYSCALL_TIMES
  75         sysctl_createv(clog, 0, NULL, NULL,
  76                         CTLFLAG_PERMANENT,
  77                         CTLTYPE_STRUCT, "times",
  78                         SYSCTL_DESCR("per syscall times"),
  79                         NULL, 0, syscall_times, sizeof syscall_times,
  80                         CTL_KERN, kern_syscalls, CTL_CREATE);
  81 #endif
  82 }
  83 #endif