msync.c revision 0
0N/A/*
0N/A * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
0N/A * Use is subject to license terms.
0N/A */
0N/A
0N/A#ifdef __sun
0N/A#pragma ident "@(#)msync.c 1.1 05/08/04 SMI"
0N/A#endif
0N/A
0N/A#include <sys/mman.h>
0N/A#include <unistd.h>
0N/A#include <stdlib.h>
0N/A#include <stdio.h>
0N/A#include <fcntl.h>
0N/A#include <strings.h>
0N/A
0N/A#include "libmicro.h"
0N/A
0N/Atypedef struct {
0N/A char *ts_map;
0N/A int ts_foo; /* defeat optimizers */
0N/A} tsd_t;
0N/A
0N/A#define DEFF "/dev/zero"
0N/A#define DEFL 8192
0N/A
0N/Astatic char *optf = DEFF;
0N/Astatic long long optl = DEFL;
0N/Astatic int optr = 0;
0N/Astatic int opts = 0;
0N/Astatic int optw = 0;
0N/Astatic int opta = MS_SYNC;
0N/Astatic int opti = 0;
0N/Astatic int anon = 0;
0N/Astatic int pagesize;
0N/A
0N/Aint
0N/Abenchmark_init()
0N/A{
0N/A lm_tsdsize = sizeof (tsd_t);
0N/A
0N/A (void) sprintf(lm_optstr, "af:il:rsw");
0N/A
0N/A (void) sprintf(lm_usage,
0N/A " [-f file-to-map (default %s)]\n"
0N/A " [-l mapping-length (default %d)]\n"
0N/A " [-r] (read a byte from each page between msyncs)\n"
0N/A " [-w] (write a byte to each page between msyncs)\n"
0N/A " [-s] (use MAP_SHARED instead of MAP_PRIVATE)\n"
0N/A " [-a (specify MS_ASYNC rather than default MS_SYNC)\n"
0N/A " [-i (specify MS_INVALIDATE)\n"
0N/A "notes: measures msync()\n",
0N/A DEFF, DEFL);
0N/A
0N/A (void) sprintf(lm_header, "%8s %6s", "length", "flags");
0N/A
0N/A return (0);
0N/A}
0N/A
0N/Aint
0N/Abenchmark_optswitch(int opt, char *optarg)
0N/A{
0N/A switch (opt) {
0N/A case 'a':
0N/A opta = MS_ASYNC;
0N/A break;
0N/A
0N/A case 'f':
0N/A optf = optarg;
0N/A break;
0N/A
0N/A case 'i':
0N/A opti = MS_INVALIDATE;
0N/A break;
0N/A
0N/A case 'l':
0N/A optl = sizetoll(optarg);
0N/A break;
0N/A case 'r':
0N/A optr = 1;
0N/A break;
0N/A case 's':
0N/A opts = 1;
0N/A break;
0N/A case 'w':
0N/A optw = 1;
0N/A break;
0N/A default:
0N/A return (-1);
0N/A }
0N/A
0N/A pagesize = getpagesize();
0N/A
0N/A return (0);
0N/A}
0N/A
0N/Aint
0N/Abenchmark_initworker(void *tsd)
0N/A{
0N/A tsd_t *ts = (tsd_t *)tsd;
0N/A
0N/A int fd;
0N/A
0N/A if ((fd = open(optf, O_RDWR)) < 0) {
0N/A perror("open:");
0N/A return (1);
0N/A }
0N/A
0N/A (void) ftruncate(fd, optl);
0N/A
0N/A if ((ts->ts_map = (char *)mmap(NULL, optl,
0N/A PROT_READ | PROT_WRITE, opts ? MAP_SHARED : MAP_PRIVATE,
0N/A fd, 0L)) == MAP_FAILED) {
0N/A perror("mmap:");
0N/A (void) close(fd);
0N/A return (1);
0N/A }
0N/A
0N/A return (0);
0N/A}
0N/A
0N/Aint
0N/Abenchmark(void *tsd, result_t *res)
0N/A{
0N/A tsd_t *ts = (tsd_t *)tsd;
0N/A int i, j;
0N/A
0N/A for (i = 0; i < lm_optB; i++) {
0N/A
0N/A if (msync(ts->ts_map, optl, opta | opti) < 0) {
0N/A perror("msync:");
0N/A res->re_errors++;
0N/A break;
0N/A }
0N/A
0N/A if (optr) {
0N/A for (j = 0; j < optl; j += pagesize) {
0N/A ts->ts_foo += ts->ts_map[j];
0N/A }
0N/A }
0N/A
0N/A if (optw) {
0N/A for (j = 0; j < optl; j += pagesize) {
0N/A ts->ts_map[j] = 1;
0N/A }
0N/A }
0N/A }
0N/A res->re_count = i;
0N/A
0N/A return (0);
0N/A}
0N/A
0N/Achar *
0N/Abenchmark_result()
0N/A{
0N/A static char result[256];
0N/A char flags[6];
0N/A
0N/A flags[0] = anon ? 'a' : '-';
0N/A flags[1] = optr ? 'r' : '-';
0N/A flags[2] = optw ? 'w' : '-';
0N/A flags[3] = opts ? 's' : '-';
0N/A flags[4] = opti ? 'i' : '-';
0N/A flags[5] = 0;
0N/A
0N/A (void) sprintf(result, "%8lld %6s", optl, flags);
0N/A
0N/A return (result);
0N/A}