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      1 /*	$NetBSD: subr_syscall_stats.c,v 1.5 2019/01/27 02:08:43 pgoyette 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 __KERNEL_RCSID(0, "$NetBSD: subr_syscall_stats.c,v 1.5 2019/01/27 02:08:43 pgoyette 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, &cnode,
     57 			CTLFLAG_PERMANENT,
     58 			CTLTYPE_NODE, "syscalls",
     59 			SYSCTL_DESCR("per syscall statistics"),
     60 			NULL, 0, NULL, 0,
     61 			CTL_KERN, CTL_CREATE);
     62 	kern_syscalls = cnode->sysctl_num;
     63         sysctl_createv(clog, 0, NULL, NULL,
     64 			CTLFLAG_PERMANENT,
     65 			CTLTYPE_STRUCT, "counts",
     66 			SYSCTL_DESCR("per syscall counts"),
     67 			NULL, 0, syscall_counts, sizeof syscall_counts,
     68 			CTL_KERN, kern_syscalls, CTL_CREATE);
     69 #ifdef SYSCALL_TIMES
     70         sysctl_createv(clog, 0, NULL, NULL,
     71 			CTLFLAG_PERMANENT,
     72 			CTLTYPE_STRUCT, "times",
     73 			SYSCTL_DESCR("per syscall times"),
     74 			NULL, 0, syscall_times, sizeof syscall_times,
     75 			CTL_KERN, kern_syscalls, CTL_CREATE);
     76 #endif
     77 }
     78 #endif
     79