WhyCan Forum(哇酷开发者社区)

写入速度测试  
root@dika-pc:~# dd if=/dev/zero bs=1k count=10000 of=./savefile
10000+0 records in
10000+0 records out
10240000 bytes (10 MB, 9.8 MiB) copied, 1.02184 s, 10.0 MB/s
root@dika-pc:~# dd if=/dev/zero bs=2k count=5000 of=./savefile
5000+0 records in
5000+0 records out
10240000 bytes (10 MB, 9.8 MiB) copied, 0.727644 s, 14.1 MB/s
root@dika-pc:~# dd if=/dev/zero bs=4k count=2500 of=./savefile
2500+0 records in
2500+0 records out
10240000 bytes (10 MB, 9.8 MiB) copied, 0.570808 s, 17.9 MB/s
root@dika-pc:~# dd if=/dev/zero bs=8k count=1250 of=./savefile
1250+0 records in
1250+0 records out
10240000 bytes (10 MB, 9.8 MiB) copied, 0.580831 s, 17.6 MB/s
root@dika-pc:~# dd if=/dev/zero bs=32k count=1250 of=./savefile
1250+0 records in
1250+0 records out
40960000 bytes (41 MB, 39 MiB) copied, 2.38199 s, 17.2 MB/s
root@dika-pc:~#



读取速度测试
root@dika-pc:~# dd if=./40MB.file of=/dev/null bs=1k
32000+0 records in
32000+0 records out
32768000 bytes (33 MB, 31 MiB) copied, 1.46465 s, 22.4 MB/s
root@dika-pc:~# dd if=./40MB.file of=/dev/null bs=4k
8000+0 records in
8000+0 records out
32768000 bytes (33 MB, 31 MiB) copied, 1.2441 s, 26.3 MB/s
root@dika-pc:~# dd if=./40MB.file of=/dev/null bs=8k
4000+0 records in
4000+0 records out
32768000 bytes (33 MB, 31 MiB) copied, 1.17389 s, 27.9 MB/s
root@dika-pc:~# dd if=./40MB.file of=/dev/null bs=16k
2000+0 records in
2000+0 records out
32768000 bytes (33 MB, 31 MiB) copied, 1.13172 s, 29.0 MB/s
root@dika-pc:~# dd if=./40MB.file of=/dev/null bs=32k
1000+0 records in
1000+0 records out
32768000 bytes (33 MB, 31 MiB) copied, 1.12216 s, 29.2 MB/s
root@dika-pc:~# dd if=./40MB.file of=/dev/null bs=64k
500+0 records in
500+0 records out
32768000 bytes (33 MB, 31 MiB) copied, 1.1215 s, 29.2 MB/s
root@dika-pc:~#