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Revision 1.11, Tue Apr 22 12:21:17 2014 UTC (10 years, 1 month ago) by espie
Branch: MAIN
CVS Tags: OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, OPENBSD_5_8_BASE, OPENBSD_5_8, OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6
Changes since 1.10: +87 -88 lines

pure reindent

/* $OpenBSD: stats.c,v 1.11 2014/04/22 12:21:17 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 "config.h"
#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