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File: [cvs.NetBSD.org] / src / sys / kern / subr_syscall_stats.c (download)

Revision 1.1, Sun Feb 18 16:58:16 2007 UTC (17 years, 1 month ago) by dsl
Branch: MAIN
CVS Tags: yamt-x86pmap-base4, yamt-x86pmap-base3, yamt-x86pmap-base2, yamt-x86pmap-base, yamt-x86pmap, yamt-pf42-baseX, yamt-pf42-base, yamt-nfs-mp-base, yamt-lazymbuf-base15, yamt-lazymbuf-base14, yamt-kmem-base3, yamt-kmem-base2, yamt-kmem-base, yamt-kmem, yamt-idlelwp-base8, vmlocking2-base3, vmlocking2-base2, vmlocking2-base1, vmlocking2, vmlocking-nbase, vmlocking-base, vmlocking, thorpej-atomic-base, thorpej-atomic, reinoud-bufcleanup-nbase, reinoud-bufcleanup-base, reinoud-bufcleanup, nick-net80211-sync-base, nick-net80211-sync, nick-csl-alignment-base5, nick-csl-alignment-base, nick-csl-alignment, mjf-ufs-trans-base, mjf-ufs-trans, mjf-devfs-base, mjf-devfs, matt-mips64-base, matt-mips64, matt-armv6-prevmlocking, matt-armv6-nbase, matt-armv6-base, matt-armv6, keiichi-mipv6-nbase, keiichi-mipv6-base, keiichi-mipv6, jmcneill-pm-base, jmcneill-pm, jmcneill-base, hpcarm-cleanup-base, hpcarm-cleanup, cube-autoconf-base, cube-autoconf, bouyer-xeni386-nbase, bouyer-xeni386-merge1, bouyer-xeni386-base, bouyer-xeni386, bouyer-xenamd64-base2, bouyer-xenamd64-base, bouyer-xenamd64, ad-socklock-base1, ad-audiomp-base, ad-audiomp
Branch point for: yamt-pf42, yamt-nfs-mp, yamt-lazymbuf, yamt-idlelwp, mjf-devfs2

Add code to support per-system call statistics:
option SYSCALL_STATS	counts the number of times each system call is made
option SYSCALL_TIMES	counts the amount of time spent in each system call
Currently the counting hooks have only been added to the i386 system call
handler, and the time spent in interrupts is not subtracted.
It ought also be possible to add the times to the processes profiling
counters in order to get a more accurate user/system/interrupt split.
The counts themselves are readable via the sysctl interface.

/*	$NetBSD: subr_syscall_stats.c,v 1.1 2007/02/18 16:58:16 dsl 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.
 * 3. Neither the name of The NetBSD Foundation 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 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>
__RCSID("$NetBSD: subr_syscall_stats.c,v 1.1 2007/02/18 16:58:16 dsl 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, NULL,
			CTLFLAG_PERMANENT,  
			CTLTYPE_NODE, "kern", NULL,
			NULL, 0, NULL, 0,
			CTL_KERN, CTL_EOL);
        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