Annotation of src/usr.bin/make/stats.c, Revision 1.5
1.1 espie 1: /* $OpenPackages$ */
1.5 ! espie 2: /* $OpenBSD: stats.c,v 1.4 2001/06/05 11:59:54 espie Exp $ */
1.1 espie 3:
4: /*
5: * Copyright (c) 1999 Marc Espie.
6: *
7: * Code written for the OpenBSD project.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
19: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
22: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31:
32: /* statistics gathering */
33:
34: /* collection across make invocations is done with an mmap shared file,
35: to allow for concurrent adjustment to variables.
36: */
37:
1.2 espie 38: #include "config.h"
39: #include "defines.h"
1.1 espie 40: #include "stats.h"
41:
42: #ifdef HAS_STATS
1.3 espie 43: #include <fcntl.h>
1.1 espie 44: #include <stdio.h>
1.3 espie 45: #include <stdlib.h>
46: #include <sys/time.h>
1.1 espie 47: #include <sys/mman.h>
48: #include <sys/types.h>
49: #include <sys/resource.h>
1.3 espie 50: #include "memory.h"
1.1 espie 51:
52: static void print_stats(void);
53: void Init_Stats(void);
54: static float average_runs(unsigned long val);
55: unsigned long *statarray;
56:
1.2 espie 57: static bool mmapped = false;
1.1 espie 58:
59: static float
60: average_runs(val)
61: unsigned long val;
62: {
63: return (float)val / STAT_INVOCATIONS;
64: }
65:
66: static void
67: print_stats()
68: {
69: struct rusage ru;
70:
71: if (getrusage(RUSAGE_SELF, &ru) != -1) {
72: STAT_USER_SECONDS += ru.ru_utime.tv_sec;
73: STAT_USER_MS += ru.ru_utime.tv_usec;
74: if (STAT_USER_MS > 1000000) {
75: STAT_USER_MS -= 1000000;
76: STAT_USER_SECONDS++;
77: }
78: STAT_SYS_SECONDS += ru.ru_stime.tv_sec;
79: STAT_SYS_MS += ru.ru_stime.tv_usec;
80: if (STAT_SYS_MS > 1000000) {
81: STAT_SYS_MS -= 1000000;
82: STAT_SYS_SECONDS++;
83: }
84: }
85: fprintf(stderr, "Make runs: %lu\n", STAT_INVOCATIONS);
86: fprintf(stderr, "Time user: %lu.%06lu, sys %lu.%06lu\n",
87: STAT_USER_SECONDS, STAT_USER_MS,
88: STAT_SYS_SECONDS, STAT_SYS_MS);
89: #ifdef STATS_VAR_LOOKUP
90: /* to get the average total of MAXSIZE, we need this value */
91: STAT_VAR_POWER +=
92: STAT_VAR_HASH_MAXSIZE * STAT_VAR_HASH_CREATION;
93: fprintf(stderr, "Var finds: %f, lookups: %f, average: %f, max: %lu\n",
94: average_runs(STAT_VAR_FIND),
95: average_runs(STAT_VAR_SEARCHES),
96: (float)STAT_VAR_COUNT/STAT_VAR_SEARCHES,
97: STAT_VAR_MAXCOUNT);
98: fprintf(stderr, "Average hash: %f, creation: %f, from env %f\n",
99: average_runs(STAT_VAR_HASH_CREATION),
100: average_runs(STAT_VAR_CREATION),
101: average_runs(STAT_VAR_FROM_ENV));
102: fprintf(stderr, "Local hash max: %lu, global hash max: %lu, average local: %f\n",
103: STAT_VAR_HASH_MAXSIZE,
104: STAT_VAR_GHASH_MAXSIZE,
105: (float)STAT_VAR_POWER/STAT_VAR_HASH_CREATION);
106: #endif
107: #ifdef STATS_GN_CREATION
108: fprintf(stderr, "Average GN: %f\n", average_runs(STAT_GN_COUNT));
109: #endif
110: #ifdef STATS_BUF
111: fprintf(stderr, "Buf tot: %f, def: %f, exp %f, weird %f, bad %f\n",
112: average_runs(STAT_TOTAL_BUFS),
113: average_runs(STAT_DEFAULT_BUFS),
114: average_runs(STAT_BUFS_EXPANSION),
115: average_runs(STAT_WEIRD_BUFS),
116: average_runs(STAT_WEIRD_INEFFICIENT));
117: #endif
118: #ifdef STATS_HASH
119: fprintf(stderr, "Hashes new: %f, exp: %f, lookup %f, l: %f, +: %f, ent : %f\n",
120: average_runs(STAT_HASH_CREATION),
121: average_runs(STAT_HASH_EXPAND),
122: average_runs(STAT_HASH_LOOKUP),
123: (float)STAT_HASH_LENGTH/STAT_HASH_LOOKUP,
124: (float)STAT_HASH_POSITIVE/STAT_HASH_LOOKUP,
125: (float)STAT_HASH_ENTRIES/STAT_HASH_SIZE);
1.5 ! espie 126: #endif
! 127: #ifdef STATS_GROW
! 128: fprintf(stderr, "Grow: %f\n", average_runs(STAT_GROWARRAY));
1.1 espie 129: #endif
130: if (mmapped)
131: munmap(statarray, STAT_NUMBER * sizeof(unsigned long));
132: }
133:
134: void
135: Init_Stats()
136: {
137: char *name;
138: int fd;
139:
140: /* try to get ahold of a stats collecting file */
141: name = getenv("MAKESTATS");
142: if (name) {
143: while ((fd = open(name, O_RDWR)) == -1) {
144: /* if collecting file does not already exist, fill it with
145: * zeros (so all stats starting values should be 0) */
146: unsigned long n;
147: int i;
148: FILE *f;
149:
150: f = fopen(name, "w");
151:
152: n = 0;
153: for (i = 0; i < STAT_NUMBER; i++)
154: fwrite(&n, sizeof(unsigned long), 1, f);
155: fclose(f);
156: }
157:
158: /* either we've got the file -> share it across makes */
159: if (fd) {
160: statarray = mmap(0, STAT_NUMBER * sizeof(unsigned long),
161: PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
162: if (statarray == MAP_FAILED)
163: exit(1);
1.2 espie 164: mmapped = true;
1.1 espie 165: }
166: } else
167: /* or we don't -> simple stats gathering */
1.4 espie 168: statarray = ecalloc(sizeof(unsigned long), STAT_NUMBER);
1.1 espie 169: STAT_INVOCATIONS++;
170: atexit(print_stats);
171: }
172:
173: #endif
174:
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