Return to stats.c CVS log

Up to [local] / src / usr.bin / make

GC old code that was originally implemented to facilitate adoption by
other BSDs, which never happened, so make things simpler for further
development.

Ditches config.h entirely since it gets reduced to 2 defines.

okay tb@

/* $OpenBSD: stats.c,v 1.12 2023/09/04 11:35:11 espie Exp $ */

/*
 * Copyright (c) 1999 Marc Espie.
 *
 * Code written for the OpenBSD project.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
 * PROJECT 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.
 */


/* statistics gathering */

/* collection across make invocations is done with an mmap shared file,
   to allow for concurrent adjustment to variables.
 */

#include "defines.h"
#include "stats.h"

#ifdef HAS_STATS
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/resource.h>
#include "memory.h"

static void print_stats(void);
void Init_Stats(void);
static float average_runs(unsigned long val);
unsigned long *statarray;

static bool mmapped = false;

static float
average_runs(unsigned long val)
{
	return (float)val / STAT_INVOCATIONS;
}

static void
print_stats(void)
{
	struct rusage ru;

	if (getrusage(RUSAGE_SELF, &ru) != -1) {
		STAT_USER_SECONDS += ru.ru_utime.tv_sec;
		STAT_USER_MS += ru.ru_utime.tv_usec;
		if (STAT_USER_MS > 1000000) {
			STAT_USER_MS -= 1000000;
			STAT_USER_SECONDS++;
		}
		STAT_SYS_SECONDS += ru.ru_stime.tv_sec;
		STAT_SYS_MS += ru.ru_stime.tv_usec;
		if (STAT_SYS_MS > 1000000) {
			STAT_SYS_MS -= 1000000;
			STAT_SYS_SECONDS++;
		}
	}
	fprintf(stderr, "Make runs: %lu\n", STAT_INVOCATIONS);
	fprintf(stderr, "Time user: %lu.%06lu, sys %lu.%06lu\n",
	    STAT_USER_SECONDS, STAT_USER_MS,
	    STAT_SYS_SECONDS, STAT_SYS_MS);
#ifdef STATS_VAR_LOOKUP
	/* to get the average total of MAXSIZE, we need this value */
	STAT_VAR_POWER +=
	    STAT_VAR_HASH_MAXSIZE * STAT_VAR_HASH_CREATION;
	fprintf(stderr, "Var finds: %f, lookups: %f, average: %f, max: %lu\n",
	    average_runs(STAT_VAR_FIND),
	    average_runs(STAT_VAR_SEARCHES),
	    (float)STAT_VAR_COUNT/STAT_VAR_SEARCHES,
	    STAT_VAR_MAXCOUNT);
	fprintf(stderr, "Average hash: %f, creation: %f, from env %f\n",
	    average_runs(STAT_VAR_HASH_CREATION),
	    average_runs(STAT_VAR_CREATION),
	    average_runs(STAT_VAR_FROM_ENV));
	fprintf(stderr, "Local hash max: %lu, global hash max: %lu, average local: %f\n",
	    STAT_VAR_HASH_MAXSIZE,
	    STAT_VAR_GHASH_MAXSIZE,
	    (float)STAT_VAR_POWER/STAT_VAR_HASH_CREATION);
#endif
#ifdef STATS_GN_CREATION
	fprintf(stderr, "Average GN: %f\n", average_runs(STAT_GN_COUNT));
#endif
#ifdef STATS_SUFF
	fprintf(stderr, "Average Suffix lookup: %f, transforms: %f\n",
	    average_runs(STAT_SUFF_LOOKUP_NAME),
	    average_runs(STAT_TRANSFORM_LOOKUP_NAME));
#endif
#ifdef STATS_BUF
	fprintf(stderr, "Buf tot: %f, def: %f, exp %f, weird %f, bad %f\n",
	    average_runs(STAT_TOTAL_BUFS),
	    average_runs(STAT_DEFAULT_BUFS),
	    average_runs(STAT_BUFS_EXPANSION),
	    average_runs(STAT_WEIRD_BUFS),
	    average_runs(STAT_WEIRD_INEFFICIENT));
#endif
#ifdef STATS_HASH
	fprintf(stderr, "Hashes new: %f, exp: %f, lookup %f, l: %f, +: %f, ent : %f\n",
	    average_runs(STAT_HASH_CREATION),
	    average_runs(STAT_HASH_EXPAND),
	    average_runs(STAT_HASH_LOOKUP),
	    (float)STAT_HASH_LENGTH/STAT_HASH_LOOKUP,
	    (float)STAT_HASH_POSITIVE/STAT_HASH_LOOKUP,
	    (float)STAT_HASH_ENTRIES/STAT_HASH_SIZE);
#endif
#ifdef STATS_GROW
	fprintf(stderr, "Grow: %f\n", average_runs(STAT_GROWARRAY));
#endif
	if (mmapped)
		munmap(statarray, STAT_NUMBER * sizeof(unsigned long));
}

void
Init_Stats(void)
{
	char *name;
	int fd;

	/* try to get ahold of a stats collecting file */
	name = getenv("MAKESTATS");
	if (name) {
		while ((fd = open(name, O_RDWR)) == -1) {
			/* if collecting file does not already exist, fill it with
			 * zeros (so all stats starting values should be 0) */
			unsigned long n;
			int i;
			FILE *f;

			f = fopen(name, "w");

			n = 0;
			for (i = 0; i < STAT_NUMBER; i++)
				fwrite(&n, sizeof(unsigned long), 1, f);
			fclose(f);
		}

		/* either we've got the file -> share it across makes */
		if (fd) {
			statarray = mmap(0, STAT_NUMBER * sizeof(unsigned long),
			    PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
			if (statarray == MAP_FAILED)
				exit(1);
			mmapped = true;
		}
	} else
		/* or we don't -> simple stats gathering */
		statarray = ecalloc(STAT_NUMBER, sizeof(unsigned long));
	STAT_INVOCATIONS++;
	atexit(print_stats);
}

#endif