Linux下各种主要文件系统的读写性能测试 ------------实际系统中的Nand Flash速度测试结果

两篇文章均转自：http://thomasgds.blog.163.com/blog/#m=0

Linux下各种主要文件系统的读写性能测试

1、不用说，tmpfs是最快的，呵呵

2、ext2

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 1.40192 seconds, 74.8 MB/s

real 0m1.414s

user 0m0.140s

sys 0m0.230s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m2.084s

user 0m0.000s

sys 0m0.310s

3、ext3

（1）data=ordered

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 1.04712 seconds, 100 MB/s

real 0m1.057s

user 0m0.090s

sys 0m0.580s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.429s

user 0m0.020s

sys 0m0.290s

（2）data=writeback

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 0.990267 seconds, 106 MB/s

real 0m1.004s

user 0m0.110s

sys 0m0.470s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.339s

user 0m0.010s

sys 0m0.250s

（3）data=journal

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 6.45851 seconds, 16.2 MB/s

real 0m6.470s

user 0m0.080s

sys 0m0.590s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.665s

user 0m0.010s

sys 0m0.220s

4、ReiserFS

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 1.13243 seconds, 92.6 MB/s

real 0m1.153s

user 0m0.040s

sys 0m0.620s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.543s

user 0m0.000s

sys 0m0.240s

5、XFS

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 1.76025 seconds, 59.6 MB/s

real 0m2.000s

user 0m0.060s

sys 0m0.470s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m2.203s

user 0m0.010s

sys 0m0.270s

6、JFS

写测试：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

102400+0 records out

104857600 bytes (105 MB) copied, 0.581869 seconds, 180 MB/s

real 0m0.613s

user 0m0.140s

sys 0m0.250s

读测试：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m0.579s

user 0m0.010s

sys 0m0.350s

JFS文件系统还真快

ext3文件系统下，如果设置为data=journal,效果要打不少折扣。

实际系统中的Nand Flash速度测试结果

2007-11-19 12:37:25| 分类： linux学习|字号 订阅

linux下测试文件系统读写速度方法是利用time命令，往flash中写入和读出固定大小的文件，然后进行统计所得，测试写入速度的命令是：time dd

if=/dev/zero of=ffmpeg bs=1024 count=100000， 测试读出速度的命令是：time cat ffmpeg > /dev/null。得到的时间log如下：

real 0m 0.24s

user 0m 0.01s

sys 0m 0.21s

用实际文件大小处于real的时间值，就可以获得读写速度。

nand flash的写入速度：602.55KB/s

/nand # time dd if=/dev/zero of=ffmpeg bs=1024 count=100000

100000+0 records in

100000+0 records out

real 2m 45.96s

user 0m 0.72s

sys 2m 3.23s

nand flash的读出速度：1114.45KB/s

/nand # time cat ffmpeg > /dev/null

real 1m 29.73s

user 0m 0.01s

sys 1m 7.06s