2种RamDisk的读写速度

以前使用vopt测试速度,结果很难理解

 

2008-7-16 22:09:28

刚才用vopt9测试了一下硬盘和虚拟盘的速度。。。。。。

07年的pc(amd x2 4000+ 2G 7200转)

4个分区的速度为:
85/85/76/72M/s

gavotte的ramdisk盘X的速度为:
16094M/s
而RamdiskNT盘Y的速度为:
28396M/s

不知道都是内存虚拟盘,为什么速度还是差这么远?
感觉与使用的内存分页模式有关。。。。。。
y盘速度快,但是容量不能设太大
x盘的容量只受内存容量限制,但是设的太大(如2G物理内存,设了1G的x盘),往x里拷贝文件,到一定大小就会突然变得非常慢;
所以现在只设了300M,这样拷贝满了速度也是一样的。但是用vopt看,未用的区域是黑色的,不知道为什么,也许它是使用到了再分配的?但是内存占用量显然是预先就分配的

 

 

04年的笔记本d600:(Pm 1.6G 1G 5400转)

真实硬盘分区是:
32、30、21M/s

rrdisk:
14743M/s

ramdiskNT:
13726M/s

好像与家里的pc正好反了,家里是ramdiskNT的速度是rramdisk的1倍左右,笔记本却还不如rramdisk。。。。。。。。。
整理前后影响不大

 

08年的笔记本d530:(酷睿7250 2G 4G 5400转)

1150MB/s
仅仅安装了rramdisk,未使用ramdiskNT

物理硬盘是:50MB/s左右

以前使用的是vopt 9.0,现在应该是9.02,难道计算单位由Mbit/s改为Mbyte/s了?
——好像不是,vopt9.0测得的物理硬盘
【4个分区的速度为:
85/85/76/72M/s】
与现在的50M/s差不多,说明不是单位的问题

怎么会T7250(2G/2M) ddr2 667的2x2G内存,反而不如Pm1.6G(2M) ddr260的2x512M了??

莫非2者的算法不一样,新算法的结果都是慢一些的??

 

 

今晚在家用测试的结果:

好像2种ramdisk的速度差不多

就是随机4k读时,ramdiskNT要快3倍左右!

gavotte的ramdisk与超级兔子的ramdisk速度几乎完全一样!(有人说它们就是同一个程序)

 

CrystalDiskMark
http://nj.onlinedown.net/soft/57364.htm#download

home-pc:
r:/
   Sequential Read :  786.825 MB/s
  Sequential Write :  827.777 MB/s
 Random Read 512KB :  730.630 MB/s
Random Write 512KB :  766.569 MB/s
   Random Read 4KB :  166.134 MB/s
  Random Write 4KB :  165.860 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:14:07

y:/
   Sequential Read :  781.612 MB/s
  Sequential Write :  778.903 MB/s
 Random Read 512KB :  707.220 MB/s
Random Write 512KB :  748.734 MB/s
   Random Read 4KB :  518.115 MB/s
  Random Write 4KB :  478.551 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:17:44


c:/
   Sequential Read :   77.494 MB/s
  Sequential Write :   69.340 MB/s
 Random Read 512KB :   38.168 MB/s
Random Write 512KB :   32.737 MB/s
   Random Read 4KB :    0.616 MB/s
  Random Write 4KB :    1.123 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:20:38

e:/
   Sequential Read :   71.074 MB/s
  Sequential Write :   68.244 MB/s
 Random Read 512KB :   35.442 MB/s
Random Write 512KB :   31.469 MB/s
   Random Read 4KB :    0.533 MB/s
  Random Write 4KB :    1.112 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:22:51

r:/
   Sequential Read :  830.676 MB/s
  Sequential Write :  869.754 MB/s
 Random Read 512KB :  760.598 MB/s
Random Write 512KB :  807.805 MB/s
   Random Read 4KB :  171.106 MB/s
  Random Write 4KB :  168.290 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:24:54

y:/
   Sequential Read :  875.692 MB/s
  Sequential Write :  887.297 MB/s
 Random Read 512KB :  833.896 MB/s
Random Write 512KB :  839.769 MB/s
   Random Read 4KB :  511.969 MB/s
  Random Write 4KB :  486.851 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:26:55

y:/
   Sequential Read :  863.349 MB/s
  Sequential Write :  905.446 MB/s
 Random Read 512KB :  823.819 MB/s
Random Write 512KB :  870.173 MB/s
   Random Read 4KB :  509.931 MB/s
  Random Write 4KB :  480.321 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:32:32

r:/
   Sequential Read :  831.653 MB/s
  Sequential Write :  853.492 MB/s
 Random Read 512KB :  761.838 MB/s
Random Write 512KB :  795.592 MB/s
   Random Read 4KB :  169.090 MB/s
  Random Write 4KB :  166.054 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:34:40

r:/
   Sequential Read :  810.485 MB/s
  Sequential Write :  838.861 MB/s
 Random Read 512KB :  746.610 MB/s
Random Write 512KB :  770.832 MB/s
   Random Read 4KB :  172.164 MB/s
  Random Write 4KB :  168.021 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:36:32
after defrag
r:/
   Sequential Read :  776.013 MB/s
  Sequential Write :  816.621 MB/s
 Random Read 512KB :  700.448 MB/s
Random Write 512KB :  772.322 MB/s
   Random Read 4KB :  169.710 MB/s
  Random Write 4KB :  163.567 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:39:39

r:/
   Sequential Read :  801.504 MB/s
  Sequential Write :  833.720 MB/s
 Random Read 512KB :  744.489 MB/s
Random Write 512KB :  779.831 MB/s
   Random Read 4KB :  170.402 MB/s
  Random Write 4KB :  166.352 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:40:31


y:/
   Sequential Read :  790.690 MB/s
  Sequential Write :  837.186 MB/s
 Random Read 512KB :  760.471 MB/s
Random Write 512KB :  800.413 MB/s
   Random Read 4KB :  504.258 MB/s
  Random Write 4KB :  477.589 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:41:34

after defrag
r:/
   Sequential Read :  801.637 MB/s
  Sequential Write :  832.478 MB/s
 Random Read 512KB :  745.864 MB/s
Random Write 512KB :  768.315 MB/s
   Random Read 4KB :  164.031 MB/s
  Random Write 4KB :  166.869 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:43:13


y:/
   Sequential Read :  751.981 MB/s
  Sequential Write :  816.215 MB/s
 Random Read 512KB :  709.418 MB/s
Random Write 512KB :  735.873 MB/s
   Random Read 4KB :  507.354 MB/s
  Random Write 4KB :  479.220 MB/s

         Test Size : 50 MB
              Date : 2008/11/07 23:44:47

 

D530 :(酷睿7250 2G 4G 5400转)

r:/  gavotte的ramdisk盘

   Sequential Read : 1386.547 MB/s
  Sequential Write : 1281.497 MB/s
 Random Read 512KB : 2486.458 MB/s
Random Write 512KB : 1588.857 MB/s
   Random Read 4KB :  212.484 MB/s
  Random Write 4KB :  210.263 MB/s

         Test Size : 100 MB
              Date : 2008/11/10 15:26:51

c:/

   Sequential Read :   53.126 MB/s
  Sequential Write :   51.384 MB/s
 Random Read 512KB :   28.237 MB/s
Random Write 512KB :   30.223 MB/s
   Random Read 4KB :    0.475 MB/s
  Random Write 4KB :    0.859 MB/s

         Test Size : 100 MB
              Date : 2008/11/10 15:35:09

d:/

   Sequential Read :   46.979 MB/s
  Sequential Write :   46.411 MB/s
 Random Read 512KB :   28.770 MB/s
Random Write 512KB :   32.118 MB/s
   Random Read 4KB :    0.569 MB/s
  Random Write 4KB :    1.052 MB/s

         Test Size : 50 MB
              Date : 2008/11/10 15:40:38

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