Attachment 99723 Details for Bug 138880 – file.txt

file.txt

file.txt (text/plain), 3.74 KB, created by Alexander Best on 2009-09-16 16:00:14 UTC

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Creator: Alexander Best

Created: 2009-09-16 16:00:14 UTC

Size: 3.74 KB

patch

obsolete

>/* 01/02/2003	Port to LTP	avenkat@us.ibm.com */
>/* 06/30/2001	Port to Linux	nsharoff@us.ibm.com */
>/*
> *   Copyright (c) International Business Machines  Corp., 2003
> *
> *   This program is free software;  you can redistribute it and/or modify
> *   it under the terms of the GNU General Public License as published by
> *   the Free Software Foundation; either version 2 of the License, or
> *   (at your option) any later version.
> *
> *   This program is distributed in the hope that it will be useful,
> *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
> *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
> *   the GNU General Public License for more details.
> *
> *   You should have received a copy of the GNU General Public License
> *   along with this program;  if not, write to the Free Software
> *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> */
>
>/* as_anon_get:
> *	This program tests the kernel primitive as_anon_get by using up lots of
> *	level 2 page tables causing the kernel to switch to large blocks of
> *	anonymous backing store allocation.  This is done by allocating pages 4
> *	megs apart since each pt handles 1024 pages of 4096 bytes each.  Each
> *	page thus requires another page table.  The pages are then unmapped to
> *	switch back to small swap space allocations.
> */
>#include <sys/types.h>
>#include <sys/mman.h>
>#include <unistd.h>
>#include <errno.h>
>#include <stdio.h>
>/*****	LTP Port	*****/
>#include "test.h"
>#include "usctest.h"
>#define FAILED 0
>#define PASSED 1
>
>int local_flag = PASSED;
>char *TCID = "mmapstress08";
>FILE *temp;
>int TST_TOTAL = 1;
>extern int Tst_count;
>
>#if defined(__i386__) || defined(__x86_64__)
>int anyfail();
>void ok_exit();
>/*****  **      **      *****/
>
>
>
>#define NPTEPG		(1024)
>/*#define GRAN_NUMBER	(1<<2)*/
>
>#define GRAN_NUMBER	(1<<8)
>	/* == 256 @ 4MB per mmap(2), we span a total of 1 GB */
>
>
>extern time_t	time(time_t *);
>extern char	*ctime(const time_t *);
>extern long	sysconf(int name);
>
>#define ERROR(M) (void)fprintf(stderr, "%s: errno = %d: " M "\n", argv[0], \
>			errno)
>
>/*ARGSUSED*/
>int
>main(int argc, char *argv[])
>{
>	caddr_t mmapaddr, munmap_begin;
>	long pagesize = sysconf(_SC_PAGE_SIZE);
>	int i;
>	time_t t;
>
>	(void)time(&t);
>	//(void)printf("%s: Started %s", argv[0], ctime(&t));
>	if (sbrk(pagesize - ((u_long)sbrk(0)%(u_long)pagesize))==(char *)-1) {
>		ERROR("couldn't round up brk to a page boundary");
>                local_flag = FAILED;
>                anyfail();
>	}
>	/* The brk is now at the begining of a page. */
>
>	if ((munmap_begin = mmapaddr = (caddr_t)sbrk(0)) == (caddr_t)-1) {
>		ERROR("couldn't find top of brk");
>                local_flag = FAILED;
>                anyfail();
>	}
>	mmapaddr = 0;
>	/* burn level 2 ptes by spacing mmaps 4Meg apart */
>	/* This should switch to large anonymous swap space granularity */
>	for (i = 0; i < GRAN_NUMBER; i++) {
>		if (mmap(mmapaddr, pagesize, PROT_READ|PROT_WRITE,
>			MAP_ANONYMOUS|MAP_PRIVATE, 0, 0)==(caddr_t)-1)
>		{
>			ERROR("mmap failed");
>                	local_flag = FAILED;
>                	anyfail();
>		}
>		mmapaddr += NPTEPG*pagesize;
>	}
>	/* Free bizillion level2 ptes to switch to small granularity */
>	if (munmap(munmap_begin, (size_t)(mmapaddr-munmap_begin))) {
>		ERROR("munmap failed");
>                local_flag = FAILED;
>                anyfail();
>	}
>	(void)time(&t);
>	//(void)printf("%s: Finished %s", argv[0], ctime(&t));
>	ok_exit();
>	return 0;
>}
>
>
>/*****  LTP Port        *****/
>void ok_exit()
>{
>        tst_resm(TPASS, "Test passed\n");
>	tst_exit();
>}
>
>
>int anyfail()
>{
>  tst_resm(TFAIL, "Test failed\n");
>  tst_exit();
>  return 0;
>}
>
>#else /* defined(__i386__) || defined(__x86_64__) */
>int
>main (void)
>{
>  tst_resm (TCONF, "Test is only applicable for IA-32 and x86-64.");
>  tst_exit ();
>}
>#endif
>/*****  **      **      *****/

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