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經(jīng)常聽(tīng)見(jiàn)有人說(shuō)用windows 7玩網(wǎng)絡(luò )游戲的時(shí)候網(wǎng)絡(luò )延時(shí)比較高，也就是ping比平時(shí)xp的時(shí)候高一點(diǎn)，一直找不到原因，很苦惱。今天我們終于找到理由了，原來(lái)是Win7的一個(gè)服務(wù)在作怪，這個(gè)服務(wù)叫：Multimedia Class Scheduler。

　　這個(gè)服務(wù)的官方解釋是：

　　The Multimedia Class Scheduler service (MMCSS) enables multimedia applications to ensure that their time-sensitive processing receives prioritized access to CPU resources. This service enables multimedia applications to utilize as much of the CPU as possible without denying CPU resources to lower-priority applications.

　　MMCSS uses information stored in the registry to identify supported tasks and determine the relative priority of threads performing these tasks. Each thread that is performing work related to a particular task calls the AvSetMmMaxThreadCharacteristics or AvSetMmThreadCharacteristics function to inform MMCSS that it is working on that task.

　　For an example of a program that uses MMCSS, see Exclusive-Mode Streams

　　就是這個(gè)服務(wù)讓我的PING如此高，問(wèn)題是找到了，那么我們如何解決呢？很簡(jiǎn)單，禁用它就行了。

　　禁用方法：開(kāi)始--運行-regedit，展開(kāi)[HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Audiosrv]雙擊打開(kāi)右側的DependOnService項目，把MMCSS刪除（千萬(wàn)別刪到其他的），最后保存退出。

　　重啟電腦后設置才會(huì )生效，然后到服務(wù)里關(guān)閉并禁用Multimedia Class Scheduler，再進(jìn)游戲看看有沒(méi)有提高呢。