在feebsd下测试代码结果

#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>

int main(int args, char **argv) {
char file_name[255], file_name_use[255];
int fp;
int num, num2, org_num;

if (args != 3)
return 0;

memcpy(file_name, argv[1], strlen(argv[1])+1);

org_num = num = atoi(argv[2]);
num2 = num/1000;

for (; num >= 0; num--) {
if (num2 > 0)
if ((num%num2) == 0) {
printf("\rHas done %.2f%%",
((float)(org_num-num)/(float)org_num*100.0));
fflush(stdout);
}
sprintf(file_name_use, "%s_%d", file_name, num);

if ((fp = open(file_name_use, O_RDWR | O_CREAT)) < 0) {
fprintf(stderr, "Fail to creat %s\nError_Info: %s\n",
file_name, strerror(errno));
return 0;
}
else {
fchmod(fp, 0000644);
write(fp, file_name_use, strlen(file_name_use));
close(fp);
}
}
printf("\nAll files have been created\n");
return 0;
}

cc -O 2 file_create.c


$ time ./a.out /tmp/test/test 50000
Has done 100.00%
All files have been created

real    0m46.980s
user    0m0.101s
sys     0m2.458s
FreeBSD mybsd 7.0-RELEASE-p7 FreeBSD 7.0-RELEASE-p7 #0: Sun Dec 21 12:33:45 UTC 2008     [email protected]:/usr/obj/usr/src/sys/GENERIC i386



% time ./a.out /tmp/test/test 50000
Has done 100.00%
All files have been created
0.096u 2.525s 0:47.98 5.4%      5+1163k 0+102053io 0pf+0w


% time ./a.out /tmp/test/test 50000
Has done 100.00%
All files have been created
0.083u 2.558s 0:48.01 5.4%      5+1137k 0+102053io 0pf+0w

cc -v
Using built-in specs.
Target: i386-undermydesk-freebsd
Configured with: FreeBSD/i386 system compiler
Thread model: posix
gcc version 4.2.1 20070719 [FreeBSD]


gentoo linux 下 reiserfs
文件系统      类型    容量 已用 可用 已用% 挂载点
/dev/mapper/gvg-lvhome
reiserfs    9.0G 7.6G 1.5G 85% /home


time ./test /home/axlrose/temp/1/test_/test 50000
Has done 100.00%
All files have been created

real    0m6.604s
user    0m0.095s
sys     0m5.790s

gcc --version
gcc (Gentoo 4.3.2-r3 p1.6, pie-10.1.5) 4.3.2
Copyright © 2008 Free Software Foundation, Inc.
本程序是自由软件；请参看源代码的版权声明。本软件没有任何担保；
包括没有适销性和某一专用目的下的适用性担保。

FreeBSD安装在80G的IDE硬盘上, gentoo安装在 250G的sata硬盘上, reiserfs v3

重新找到ide的lvm+reiserver v3 分区
$ time ./test /home/idelvdata/test/test 50000
Has done 100.00%
All files have been created

real    0m7.072s
user    0m0.100s
sys     0m6.222s

以上 idelvdata 为ide硬盘，测试结果看来跟 sata的差不多