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authorRodney W. Grimes <rgrimes@FreeBSD.org>1994-05-24 10:09:53 +0000
committerRodney W. Grimes <rgrimes@FreeBSD.org>1994-05-24 10:09:53 +0000
commitdf8bae1de4b67ccf57f4afebd4e2bf258c38910d (patch)
tree7b1a8eb5b08af4b9f7bac45ad41398687df2c351 /sys/sys/gmon.h
parent59deaec541ae8baaa58daf6c5a2196ea7de180c3 (diff)
downloadsrc-df8bae1de4b67ccf57f4afebd4e2bf258c38910d.tar.gz
src-df8bae1de4b67ccf57f4afebd4e2bf258c38910d.zip
BSD 4.4 Lite Kernel Sources
Notes
Notes: svn path=/head/; revision=1541
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+/*-
+ * Copyright (c) 1982, 1986, 1992, 1993
+ * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ * @(#)gmon.h 8.2 (Berkeley) 1/4/94
+ */
+
+#ifndef _SYS_GMON_H_
+#define _SYS_GMON_H_
+
+#include <machine/profile.h>
+
+/*
+ * Structure prepended to gmon.out profiling data file.
+ */
+struct gmonhdr {
+ u_long lpc; /* base pc address of sample buffer */
+ u_long hpc; /* max pc address of sampled buffer */
+ int ncnt; /* size of sample buffer (plus this header) */
+ int version; /* version number */
+ int profrate; /* profiling clock rate */
+ int spare[3]; /* reserved */
+};
+#define GMONVERSION 0x00051879
+
+/*
+ * histogram counters are unsigned shorts (according to the kernel).
+ */
+#define HISTCOUNTER unsigned short
+
+/*
+ * fraction of text space to allocate for histogram counters here, 1/2
+ */
+#define HISTFRACTION 2
+
+/*
+ * Fraction of text space to allocate for from hash buckets.
+ * The value of HASHFRACTION is based on the minimum number of bytes
+ * of separation between two subroutine call points in the object code.
+ * Given MIN_SUBR_SEPARATION bytes of separation the value of
+ * HASHFRACTION is calculated as:
+ *
+ * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
+ *
+ * For example, on the VAX, the shortest two call sequence is:
+ *
+ * calls $0,(r0)
+ * calls $0,(r0)
+ *
+ * which is separated by only three bytes, thus HASHFRACTION is
+ * calculated as:
+ *
+ * HASHFRACTION = 3 / (2 * 2 - 1) = 1
+ *
+ * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
+ * is less than three, this algorithm will not work!
+ *
+ * In practice, however, call instructions are rarely at a minimal
+ * distance. Hence, we will define HASHFRACTION to be 2 across all
+ * architectures. This saves a reasonable amount of space for
+ * profiling data structures without (in practice) sacrificing
+ * any granularity.
+ */
+#define HASHFRACTION 2
+
+/*
+ * percent of text space to allocate for tostructs with a minimum.
+ */
+#define ARCDENSITY 2
+#define MINARCS 50
+#define MAXARCS ((1 << (8 * sizeof(HISTCOUNTER))) - 2)
+
+struct tostruct {
+ u_long selfpc;
+ long count;
+ u_short link;
+ u_short pad;
+};
+
+/*
+ * a raw arc, with pointers to the calling site and
+ * the called site and a count.
+ */
+struct rawarc {
+ u_long raw_frompc;
+ u_long raw_selfpc;
+ long raw_count;
+};
+
+/*
+ * general rounding functions.
+ */
+#define ROUNDDOWN(x,y) (((x)/(y))*(y))
+#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
+
+/*
+ * The profiling data structures are housed in this structure.
+ */
+struct gmonparam {
+ int state;
+ u_short *kcount;
+ u_long kcountsize;
+ u_short *froms;
+ u_long fromssize;
+ struct tostruct *tos;
+ u_long tossize;
+ long tolimit;
+ u_long lowpc;
+ u_long highpc;
+ u_long textsize;
+ u_long hashfraction;
+};
+extern struct gmonparam _gmonparam;
+
+/*
+ * Possible states of profiling.
+ */
+#define GMON_PROF_ON 0
+#define GMON_PROF_BUSY 1
+#define GMON_PROF_ERROR 2
+#define GMON_PROF_OFF 3
+
+/*
+ * Sysctl definitions for extracting profiling information from the kernel.
+ */
+#define GPROF_STATE 0 /* int: profiling enabling variable */
+#define GPROF_COUNT 1 /* struct: profile tick count buffer */
+#define GPROF_FROMS 2 /* struct: from location hash bucket */
+#define GPROF_TOS 3 /* struct: destination/count structure */
+#define GPROF_GMONPARAM 4 /* struct: profiling parameters (see above) */
+#endif /* !_SYS_GMON_H_ */