147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
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* Copyright (C) 2007 Nokia Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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* Author: Adrian Hunter
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "tests.h"
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#define WRITE_BUFFER_SIZE 32768
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void adjust_size(void)
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{
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char dummy[1024];
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unsigned long total_memory;
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FILE *f;
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total_memory = 0;
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f = fopen("/proc/meminfo", "r");
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if (fscanf(f, "%s %lu", dummy, &total_memory) != 2)
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perror("fscanf error");
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fclose(f);
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if (total_memory > 0 && tests_size_parameter > total_memory / 2)
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tests_size_parameter = total_memory / 2;
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}
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void run_pdf(void)
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{
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int fd, i;
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pid_t pid;
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int64_t repeat;
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ssize_t written;
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int64_t remains;
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size_t block;
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char file_name[256];
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char buf[WRITE_BUFFER_SIZE];
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if (tests_fs_is_currfs())
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return;
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adjust_size();
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pid = getpid();
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tests_cat_pid(file_name, "run_pdf_test_file_", pid);
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fd = open(file_name, O_CREAT | O_WRONLY,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
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CHECK(fd != -1);
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pid = getpid();
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srand(pid);
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repeat = tests_repeat_parameter;
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for (;;) {
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for (i = 0; i < WRITE_BUFFER_SIZE;++i)
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buf[i] = rand();
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remains = tests_size_parameter;
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while (remains > 0) {
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if (remains > WRITE_BUFFER_SIZE)
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block = WRITE_BUFFER_SIZE;
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else
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block = remains;
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written = write(fd, buf, block);
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if (written <= 0) {
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CHECK(errno == ENOSPC); /* File system full */
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errno = 0;
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break;
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}
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remains -= written;
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}
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/* Break if repeat count exceeded */
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if (tests_repeat_parameter > 0 && --repeat <= 0)
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break;
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CHECK(lseek(fd, 0, SEEK_SET) == 0);
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}
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CHECK(close(fd) != -1);
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CHECK(unlink(file_name) != -1);
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}
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/* Title of this test */
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const char *run_pdf_get_title(void)
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{
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return "Create / overwrite a large file in the current directory";
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}
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/* Description of this test */
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const char *run_pdf_get_description(void)
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{
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return
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"Create a file named run_pdf_test_file_pid, " \
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"where pid is the process id. The file is created " \
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"in the current directory, " \
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"if the current directory is NOT on the test " \
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"file system, otherwise no action is taken. " \
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"If a repeat count is specified, then the task repeats " \
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"that number of times. " \
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"The repeat count is given by the -n or --repeat option, " \
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"otherwise it defaults to 1. " \
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"A repeat count of zero repeats forever. " \
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"The size is given by the -z or --size option, " \
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"otherwise it defaults to 1000000. " \
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"The size is adjusted so that it is not more than " \
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"half the size of total memory.";
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}
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int main(int argc, char *argv[])
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{
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int run_test;
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/* Set default test file size */
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tests_size_parameter = 1000000;
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/* Set default test repetition */
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tests_repeat_parameter = 1;
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/* Handle common arguments */
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run_test = tests_get_args(argc, argv, run_pdf_get_title(),
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run_pdf_get_description(), "zn");
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if (!run_test)
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return 1;
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/* Do the actual test */
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run_pdf();
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return 0;
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}
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