Annotation of src/usr.bin/make/stats.c, Revision 1.12
1.12 ! espie 1: /* $OpenBSD: stats.c,v 1.11 2014/04/22 12:21:17 espie Exp $ */
1.1 espie 2:
3: /*
4: * Copyright (c) 1999 Marc Espie.
5: *
6: * Code written for the OpenBSD project.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
18: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
21: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
30:
31: /* statistics gathering */
32:
33: /* collection across make invocations is done with an mmap shared file,
34: to allow for concurrent adjustment to variables.
35: */
36:
1.2 espie 37: #include "defines.h"
1.1 espie 38: #include "stats.h"
39:
40: #ifdef HAS_STATS
1.3 espie 41: #include <fcntl.h>
1.1 espie 42: #include <stdio.h>
1.3 espie 43: #include <stdlib.h>
44: #include <sys/time.h>
1.1 espie 45: #include <sys/mman.h>
46: #include <sys/types.h>
47: #include <sys/resource.h>
1.3 espie 48: #include "memory.h"
1.1 espie 49:
50: static void print_stats(void);
51: void Init_Stats(void);
52: static float average_runs(unsigned long val);
53: unsigned long *statarray;
54:
1.2 espie 55: static bool mmapped = false;
1.1 espie 56:
57: static float
1.7 espie 58: average_runs(unsigned long val)
1.1 espie 59: {
1.11 espie 60: return (float)val / STAT_INVOCATIONS;
1.1 espie 61: }
62:
63: static void
1.7 espie 64: print_stats(void)
1.1 espie 65: {
1.11 espie 66: struct rusage ru;
1.1 espie 67:
1.11 espie 68: if (getrusage(RUSAGE_SELF, &ru) != -1) {
69: STAT_USER_SECONDS += ru.ru_utime.tv_sec;
70: STAT_USER_MS += ru.ru_utime.tv_usec;
71: if (STAT_USER_MS > 1000000) {
72: STAT_USER_MS -= 1000000;
73: STAT_USER_SECONDS++;
74: }
75: STAT_SYS_SECONDS += ru.ru_stime.tv_sec;
76: STAT_SYS_MS += ru.ru_stime.tv_usec;
77: if (STAT_SYS_MS > 1000000) {
78: STAT_SYS_MS -= 1000000;
79: STAT_SYS_SECONDS++;
80: }
1.1 espie 81: }
1.11 espie 82: fprintf(stderr, "Make runs: %lu\n", STAT_INVOCATIONS);
83: fprintf(stderr, "Time user: %lu.%06lu, sys %lu.%06lu\n",
84: STAT_USER_SECONDS, STAT_USER_MS,
85: STAT_SYS_SECONDS, STAT_SYS_MS);
1.1 espie 86: #ifdef STATS_VAR_LOOKUP
87: /* to get the average total of MAXSIZE, we need this value */
1.11 espie 88: STAT_VAR_POWER +=
89: STAT_VAR_HASH_MAXSIZE * STAT_VAR_HASH_CREATION;
90: fprintf(stderr, "Var finds: %f, lookups: %f, average: %f, max: %lu\n",
91: average_runs(STAT_VAR_FIND),
92: average_runs(STAT_VAR_SEARCHES),
93: (float)STAT_VAR_COUNT/STAT_VAR_SEARCHES,
94: STAT_VAR_MAXCOUNT);
95: fprintf(stderr, "Average hash: %f, creation: %f, from env %f\n",
96: average_runs(STAT_VAR_HASH_CREATION),
97: average_runs(STAT_VAR_CREATION),
98: average_runs(STAT_VAR_FROM_ENV));
99: fprintf(stderr, "Local hash max: %lu, global hash max: %lu, average local: %f\n",
100: STAT_VAR_HASH_MAXSIZE,
101: STAT_VAR_GHASH_MAXSIZE,
102: (float)STAT_VAR_POWER/STAT_VAR_HASH_CREATION);
1.1 espie 103: #endif
104: #ifdef STATS_GN_CREATION
1.11 espie 105: fprintf(stderr, "Average GN: %f\n", average_runs(STAT_GN_COUNT));
1.8 espie 106: #endif
107: #ifdef STATS_SUFF
1.11 espie 108: fprintf(stderr, "Average Suffix lookup: %f, transforms: %f\n",
109: average_runs(STAT_SUFF_LOOKUP_NAME),
110: average_runs(STAT_TRANSFORM_LOOKUP_NAME));
1.1 espie 111: #endif
112: #ifdef STATS_BUF
1.11 espie 113: fprintf(stderr, "Buf tot: %f, def: %f, exp %f, weird %f, bad %f\n",
114: average_runs(STAT_TOTAL_BUFS),
115: average_runs(STAT_DEFAULT_BUFS),
116: average_runs(STAT_BUFS_EXPANSION),
117: average_runs(STAT_WEIRD_BUFS),
118: average_runs(STAT_WEIRD_INEFFICIENT));
1.1 espie 119: #endif
120: #ifdef STATS_HASH
1.11 espie 121: fprintf(stderr, "Hashes new: %f, exp: %f, lookup %f, l: %f, +: %f, ent : %f\n",
122: average_runs(STAT_HASH_CREATION),
123: average_runs(STAT_HASH_EXPAND),
124: average_runs(STAT_HASH_LOOKUP),
125: (float)STAT_HASH_LENGTH/STAT_HASH_LOOKUP,
126: (float)STAT_HASH_POSITIVE/STAT_HASH_LOOKUP,
127: (float)STAT_HASH_ENTRIES/STAT_HASH_SIZE);
1.5 espie 128: #endif
129: #ifdef STATS_GROW
1.11 espie 130: fprintf(stderr, "Grow: %f\n", average_runs(STAT_GROWARRAY));
1.1 espie 131: #endif
1.11 espie 132: if (mmapped)
133: munmap(statarray, STAT_NUMBER * sizeof(unsigned long));
1.1 espie 134: }
135:
136: void
1.7 espie 137: Init_Stats(void)
1.1 espie 138: {
1.11 espie 139: char *name;
140: int fd;
1.1 espie 141:
142: /* try to get ahold of a stats collecting file */
1.11 espie 143: name = getenv("MAKESTATS");
144: if (name) {
145: while ((fd = open(name, O_RDWR)) == -1) {
146: /* if collecting file does not already exist, fill it with
147: * zeros (so all stats starting values should be 0) */
148: unsigned long n;
149: int i;
150: FILE *f;
151:
152: f = fopen(name, "w");
153:
154: n = 0;
155: for (i = 0; i < STAT_NUMBER; i++)
156: fwrite(&n, sizeof(unsigned long), 1, f);
157: fclose(f);
158: }
159:
160: /* either we've got the file -> share it across makes */
161: if (fd) {
162: statarray = mmap(0, STAT_NUMBER * sizeof(unsigned long),
163: PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
164: if (statarray == MAP_FAILED)
165: exit(1);
166: mmapped = true;
167: }
168: } else
169: /* or we don't -> simple stats gathering */
170: statarray = ecalloc(STAT_NUMBER, sizeof(unsigned long));
171: STAT_INVOCATIONS++;
172: atexit(print_stats);
1.1 espie 173: }
174:
175: #endif
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