xref: /freebsd-10.0-release/sys/sys/ktr.h

/*-
 * Copyright (c) 1996 Berkeley Software Design, Inc. 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. Berkeley Software Design Inc's name may not be used to endorse or
 *    promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``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 BERKELEY SOFTWARE DESIGN INC 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.
 *
 *	from BSDI $Id: ktr.h,v 1.10.2.7 2000/03/16 21:44:42 cp Exp $
 * $FreeBSD: stable/10/sys/sys/ktr.h 244445 2012-12-19 20:10:00Z jeff $
 */

/*
 *	Wraparound kernel trace buffer support.
 */

#ifndef _SYS_KTR_H_
#define _SYS_KTR_H_

/*
 * Trace classes
 *
 * Two of the trace classes (KTR_DEV and KTR_SUBSYS) are special in that
 * they are really placeholders so that indvidual drivers and subsystems
 * can map their internal tracing to the general class when they wish to
 * have tracing enabled and map it to 0 when they don't.
 */
#define	KTR_GEN		0x00000001		/* General (TR) */
#define	KTR_NET		0x00000002		/* Network */
#define	KTR_DEV		0x00000004		/* Device driver */
#define	KTR_LOCK	0x00000008		/* MP locking */
#define	KTR_SMP		0x00000010		/* MP general */
#define	KTR_SUBSYS	0x00000020		/* Subsystem. */
#define	KTR_PMAP	0x00000040		/* Pmap tracing */
#define	KTR_MALLOC	0x00000080		/* Malloc tracing */
#define	KTR_TRAP	0x00000100		/* Trap processing */
#define	KTR_INTR	0x00000200		/* Interrupt tracing */
#define	KTR_SIG		0x00000400		/* Signal processing */
#define	KTR_SPARE2	0x00000800		/* XXX Used by cxgb */
#define	KTR_PROC	0x00001000		/* Process scheduling */
#define	KTR_SYSC	0x00002000		/* System call */
#define	KTR_INIT	0x00004000		/* System initialization */
#define	KTR_SPARE3	0x00008000		/* XXX Used by cxgb */
#define	KTR_SPARE4	0x00010000		/* XXX Used by cxgb */
#define	KTR_EVH		0x00020000		/* Eventhandler */
#define	KTR_VFS		0x00040000		/* VFS events */
#define	KTR_VOP		0x00080000		/* Auto-generated vop events */
#define	KTR_VM		0x00100000		/* The virtual memory system */
#define	KTR_INET	0x00200000		/* IPv4 stack */
#define	KTR_RUNQ	0x00400000		/* Run queue */
#define	KTR_CONTENTION	0x00800000		/* Lock contention */
#define	KTR_UMA		0x01000000		/* UMA slab allocator */
#define	KTR_CALLOUT	0x02000000		/* Callouts and timeouts */
#define	KTR_GEOM	0x04000000		/* GEOM I/O events */
#define	KTR_BUSDMA	0x08000000		/* busdma(9) events */
#define	KTR_INET6	0x10000000		/* IPv6 stack */
#define	KTR_SCHED	0x20000000		/* Machine parsed sched info. */
#define	KTR_BUF		0x40000000		/* Buffer cache */
#define	KTR_ALL		0x7fffffff

/* Trace classes to compile in */
#ifdef KTR
#ifndef KTR_COMPILE
#define	KTR_COMPILE	(KTR_ALL)
#endif
#else	/* !KTR */
#undef KTR_COMPILE
#define KTR_COMPILE 0
#endif	/* KTR */

/*
 * Version number for ktr_entry struct.  Increment this when you break binary
 * compatibility.
 */
#define	KTR_VERSION	2

#define	KTR_PARMS	6

#ifndef LOCORE

#include <sys/param.h>
#include <sys/_cpuset.h>

struct ktr_entry {
	u_int64_t ktr_timestamp;
	int	ktr_cpu;
	int	ktr_line;
	const	char *ktr_file;
	const	char *ktr_desc;
	struct	thread *ktr_thread;
	u_long	ktr_parms[KTR_PARMS];
};

extern cpuset_t ktr_cpumask;
extern int ktr_mask;
extern int ktr_entries;
extern int ktr_verbose;

extern volatile int ktr_idx;
extern struct ktr_entry *ktr_buf;

#ifdef KTR

void	ktr_tracepoint(u_int mask, const char *file, int line,
	    const char *format, u_long arg1, u_long arg2, u_long arg3,
	    u_long arg4, u_long arg5, u_long arg6);

#define CTR6(m, format, p1, p2, p3, p4, p5, p6) do {			\
	if (KTR_COMPILE & (m))						\
		ktr_tracepoint((m), __FILE__, __LINE__, format,		\
		    (u_long)(p1), (u_long)(p2), (u_long)(p3),		\
		    (u_long)(p4), (u_long)(p5), (u_long)(p6));		\
	} while(0)
#define CTR0(m, format)			CTR6(m, format, 0, 0, 0, 0, 0, 0)
#define CTR1(m, format, p1)		CTR6(m, format, p1, 0, 0, 0, 0, 0)
#define	CTR2(m, format, p1, p2)		CTR6(m, format, p1, p2, 0, 0, 0, 0)
#define	CTR3(m, format, p1, p2, p3)	CTR6(m, format, p1, p2, p3, 0, 0, 0)
#define	CTR4(m, format, p1, p2, p3, p4)	CTR6(m, format, p1, p2, p3, p4, 0, 0)
#define	CTR5(m, format, p1, p2, p3, p4, p5)	CTR6(m, format, p1, p2, p3, p4, p5, 0)
#else	/* KTR */
#define	CTR0(m, d)			(void)0
#define	CTR1(m, d, p1)			(void)0
#define	CTR2(m, d, p1, p2)		(void)0
#define	CTR3(m, d, p1, p2, p3)		(void)0
#define	CTR4(m, d, p1, p2, p3, p4)	(void)0
#define	CTR5(m, d, p1, p2, p3, p4, p5)	(void)0
#define	CTR6(m, d, p1, p2, p3, p4, p5, p6)	(void)0
#endif	/* KTR */

#define	TR0(d)				CTR0(KTR_GEN, d)
#define	TR1(d, p1)			CTR1(KTR_GEN, d, p1)
#define	TR2(d, p1, p2)			CTR2(KTR_GEN, d, p1, p2)
#define	TR3(d, p1, p2, p3)		CTR3(KTR_GEN, d, p1, p2, p3)
#define	TR4(d, p1, p2, p3, p4)		CTR4(KTR_GEN, d, p1, p2, p3, p4)
#define	TR5(d, p1, p2, p3, p4, p5)	CTR5(KTR_GEN, d, p1, p2, p3, p4, p5)
#define	TR6(d, p1, p2, p3, p4, p5, p6)	CTR6(KTR_GEN, d, p1, p2, p3, p4, p5, p6)

/*
 * The event macros implement KTR graphic plotting facilities provided
 * by src/tools/sched/schedgraph.py.  Three generic types of events are
 * supported: states, counters, and points.
 *
 * m is the ktr class for ktr_mask.
 * ident is the string identifier that owns the event (ie: "thread 10001")
 * etype is the type of event to plot (state, counter, point)
 * edat is the event specific data (state name, counter value, point name)
 * up to four attributes may be supplied as a name, value pair of arguments.
 *
 * etype and attribute names must be string constants.  This minimizes the
 * number of ktr slots required by construction the final format strings
 * at compile time.  Both must also include a colon and format specifier
 * (ie. "prio:%d", prio).  It is recommended that string arguments be
 * contained within escaped quotes if they may contain ',' or ':' characters.
 *
 * The special attribute (KTR_ATTR_LINKED, ident) creates a reference to another
 * id on the graph for easy traversal of related graph elements.
 */

#define	KTR_ATTR_LINKED	"linkedto:\"%s\""
#define	KTR_EFMT(egroup, ident, etype)					\
	    "KTRGRAPH group:\"" egroup "\", id:\"%s\", " etype ", attributes: "

#define	KTR_EVENT0(m, egroup, ident, etype, edat)			\
	CTR2(m,	KTR_EFMT(egroup, ident, etype) "none", ident, edat)
#define	KTR_EVENT1(m, egroup, ident, etype, edat, a0, v0)		\
	CTR3(m, KTR_EFMT(egroup, ident, etype) a0, ident, edat, (v0))
#define	KTR_EVENT2(m, egroup, ident, etype, edat, a0, v0, a1, v1)	\
	CTR4(m, KTR_EFMT(egroup, ident, etype) a0 ", " a1,		\
	    ident, edat, (v0), (v1))
#define	KTR_EVENT3(m, egroup, ident, etype, edat, a0, v0, a1, v1, a2, v2)\
	CTR5(m,KTR_EFMT(egroup, ident, etype) a0 ", " a1 ", " a2,	\
	    ident, edat, (v0), (v1), (v2))
#define	KTR_EVENT4(m, egroup, ident, etype, edat,			\
	    a0, v0, a1, v1, a2, v2, a3, v3)				\
	CTR6(m,KTR_EFMT(egroup, ident, etype) a0 ", " a1 ", " a2 ", " a3,\
	     ident, edat, (v0), (v1), (v2), (v3))

/*
 * State functions graph state changes on an ident.
 */
#define KTR_STATE0(m, egroup, ident, state)				\
	KTR_EVENT0(m, egroup, ident, "state:\"%s\"", state)
#define KTR_STATE1(m, egroup, ident, state, a0, v0)			\
	KTR_EVENT1(m, egroup, ident, "state:\"%s\"", state, a0, (v0))
#define KTR_STATE2(m, egroup, ident, state, a0, v0, a1, v1)		\
	KTR_EVENT2(m, egroup, ident, "state:\"%s\"", state, a0, (v0), a1, (v1))
#define KTR_STATE3(m, egroup, ident, state, a0, v0, a1, v1, a2, v2)	\
	KTR_EVENT3(m, egroup, ident, "state:\"%s\"",			\
	    state, a0, (v0), a1, (v1), a2, (v2))
#define KTR_STATE4(m, egroup, ident, state, a0, v0, a1, v1, a2, v2, a3, v3)\
	KTR_EVENT4(m, egroup, ident, "state:\"%s\"",			\
	    state, a0, (v0), a1, (v1), a2, (v2), a3, (v3))

/*
 * Counter functions graph counter values.  The counter id
 * must not be intermixed with a state id.
 */
#define	KTR_COUNTER0(m, egroup, ident, counter)				\
	KTR_EVENT0(m, egroup, ident, "counter:%d", counter)
#define	KTR_COUNTER1(m, egroup, ident, edat, a0, v0)			\
	KTR_EVENT1(m, egroup, ident, "counter:%d", counter, a0, (v0))
#define	KTR_COUNTER2(m, egroup, ident, counter, a0, v0, a1, v1)		\
	KTR_EVENT2(m, egroup, ident, "counter:%d", counter, a0, (v0), a1, (v1))
#define	KTR_COUNTER3(m, egroup, ident, counter, a0, v0, a1, v1, a2, v2)	\
	KTR_EVENT3(m, egroup, ident, "counter:%d",			\
	    counter, a0, (v0), a1, (v1), a2, (v2))
#define	KTR_COUNTER4(m, egroup, ident, counter, a0, v0, a1, v1, a2, v2, a3, v3)\
	KTR_EVENT4(m, egroup, ident, "counter:%d",			\
	    counter, a0, (v0), a1, (v1), a2, (v2), a3, (v3))

/*
 * Point functions plot points of interest on counter or state graphs.
 */
#define	KTR_POINT0(m, egroup, ident, point)				\
	KTR_EVENT0(m, egroup, ident, "point:\"%s\"", point)
#define	KTR_POINT1(m, egroup, ident, point, a0, v0)			\
	KTR_EVENT1(m, egroup, ident, "point:\"%s\"", point, a0, (v0))
#define	KTR_POINT2(m, egroup, ident, point, a0, v0, a1, v1)		\
	KTR_EVENT2(m, egroup, ident, "point:\"%s\"", point, a0, (v0), a1, (v1))
#define	KTR_POINT3(m, egroup, ident, point, a0, v0, a1, v1, a2, v2)	\
	KTR_EVENT3(m, egroup, ident, "point:\"%s\"", point,		\
	    a0, (v0), a1, (v1), a2, (v2))
#define	KTR_POINT4(m, egroup, ident, point, a0, v0, a1, v1, a2, v2, a3, v3)\
	KTR_EVENT4(m, egroup, ident, "point:\"%s\"",			\
	    point, a0, (v0), a1, (v1), a2, (v2), a3, (v3))

/*
 * Start functions denote the start of a region of code or operation
 * and should be paired with stop functions for timing of nested
 * sequences.
 *
 * Specifying extra attributes with the name "key" will result in
 * multi-part keys.  For example a block device and offset pair
 * might be used to describe a buf undergoing I/O.
 */
#define	KTR_START0(m, egroup, ident, key)				\
	KTR_EVENT0(m, egroup, ident, "start:0x%jX", (uintmax_t)key)
#define	KTR_START1(m, egroup, ident, key, a0, v0)			\
	KTR_EVENT1(m, egroup, ident, "start:0x%jX", (uintmax_t)key, a0, (v0))
#define	KTR_START2(m, egroup, ident, key, a0, v0, a1, v1)		\
	KTR_EVENT2(m, egroup, ident, "start:0x%jX", (uintmax_t)key,	\
	    a0, (v0), a1, (v1))
#define	KTR_START3(m, egroup, ident, key, a0, v0, a1, v1, a2, v2)\
	KTR_EVENT3(m, egroup, ident, "start:0x%jX", (uintmax_t)key,	\
	    a0, (v0), a1, (v1), a2, (v2))
#define	KTR_START4(m, egroup, ident, key,				\
	    a0, v0, a1, v1, a2, v2, a3, v3)				\
	KTR_EVENT4(m, egroup, ident, "start:0x%jX", (uintmax_t)key,	\
	    a0, (v0), a1, (v1), a2, (v2), a3, (v3))

/*
 * Stop functions denote the end of a region of code or operation
 * and should be paired with start functions for timing of nested
 * sequences.
 */
#define	KTR_STOP0(m, egroup, ident, key)				\
	KTR_EVENT0(m, egroup, ident, "stop:0x%jX", (uintmax_t)key)
#define	KTR_STOP1(m, egroup, ident, key, a0, v0)			\
	KTR_EVENT1(m, egroup, ident, "stop:0x%jX", (uintmax_t)key, a0, (v0))
#define	KTR_STOP2(m, egroup, ident, key, a0, v0, a1, v1)		\
	KTR_EVENT2(m, egroup, ident, "stop:0x%jX", (uintmax_t)key,	\
	    a0, (v0), a1, (v1))
#define	KTR_STOP3(m, egroup, ident, key, a0, v0, a1, v1, a2, v2)\
	KTR_EVENT3(m, egroup, ident, "stop:0x%jX", (uintmax_t)key,	\
	    a0, (v0), a1, (v1), a2, (v2))
#define	KTR_STOP4(m, egroup, ident, 					\
	    key, a0, v0, a1, v1, a2, v2, a3, v3)			\
	KTR_EVENT4(m, egroup, ident, "stop:0x%jX", (uintmax_t)key,	\
	    a0, (v0), a1, (v1), a2, (v2), a3, (v3))

/*
 * Trace initialization events, similar to CTR with KTR_INIT, but
 * completely ifdef'ed out if KTR_INIT isn't in KTR_COMPILE (to
 * save string space, the compiler doesn't optimize out strings
 * for the conditional ones above).
 */
#if (KTR_COMPILE & KTR_INIT) != 0
#define	ITR0(d)				CTR0(KTR_INIT, d)
#define	ITR1(d, p1)			CTR1(KTR_INIT, d, p1)
#define	ITR2(d, p1, p2)			CTR2(KTR_INIT, d, p1, p2)
#define	ITR3(d, p1, p2, p3)		CTR3(KTR_INIT, d, p1, p2, p3)
#define	ITR4(d, p1, p2, p3, p4)		CTR4(KTR_INIT, d, p1, p2, p3, p4)
#define	ITR5(d, p1, p2, p3, p4, p5)	CTR5(KTR_INIT, d, p1, p2, p3, p4, p5)
#define	ITR6(d, p1, p2, p3, p4, p5, p6)	CTR6(KTR_INIT, d, p1, p2, p3, p4, p5, p6)
#else
#define	ITR0(d)
#define	ITR1(d, p1)
#define	ITR2(d, p1, p2)
#define	ITR3(d, p1, p2, p3)
#define	ITR4(d, p1, p2, p3, p4)
#define	ITR5(d, p1, p2, p3, p4, p5)
#define	ITR6(d, p1, p2, p3, p4, p5, p6)
#endif

#endif /* !LOCORE */

#endif /* !_SYS_KTR_H_ */