xref: /src/sys/kern/subr_syscall_stats.c

/*	$NetBSD: subr_syscall_stats.c,v 1.5 2019/01/27 02:08:43 pgoyette Exp $	*/

/*-
 * Copyright (c) 2007 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by David Laight.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_syscall_stats.c,v 1.5 2019/01/27 02:08:43 pgoyette Exp $");

#include "opt_syscall_stats.h"

#include <sys/param.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>

#include <sys/syscall_stats.h>

#ifdef SYSCALL_STATS
uint64_t syscall_counts[SYS_NSYSENT];
uint64_t syscall_count_user, syscall_count_system, syscall_count_interrupt;

#ifdef SYSCALL_TIMES
uint64_t syscall_times[SYS_NSYSENT];
#endif

SYSCTL_SETUP(sysctl_syscall_setup, "sysctl system call stats")
{
	const struct sysctlnode *cnode;
	int kern_syscalls;

        sysctl_createv(clog, 0, NULL, &cnode,
			CTLFLAG_PERMANENT,
			CTLTYPE_NODE, "syscalls",
			SYSCTL_DESCR("per syscall statistics"),
			NULL, 0, NULL, 0,
			CTL_KERN, CTL_CREATE);
	kern_syscalls = cnode->sysctl_num;
        sysctl_createv(clog, 0, NULL, NULL,
			CTLFLAG_PERMANENT,
			CTLTYPE_STRUCT, "counts",
			SYSCTL_DESCR("per syscall counts"),
			NULL, 0, syscall_counts, sizeof syscall_counts,
			CTL_KERN, kern_syscalls, CTL_CREATE);
#ifdef SYSCALL_TIMES
        sysctl_createv(clog, 0, NULL, NULL,
			CTLFLAG_PERMANENT,
			CTLTYPE_STRUCT, "times",
			SYSCTL_DESCR("per syscall times"),
			NULL, 0, syscall_times, sizeof syscall_times,
			CTL_KERN, kern_syscalls, CTL_CREATE);
#endif
}
#endif