英语释义

1. doctor of musical arts

片语

dma channel存储器直接存取通道（DMA等于direct memory access）

DMA technologyDMA技术

DMA传输DMA transfer

dma controller直接记忆器存取控制器

FX DMA对外汇市场的直接入口

as DMAabbr. 美国制药商协会（American Drug Manufacturers' Association）；不对称二甲基精氨酸

DMA Design游戏制作

Video DMA视讯直接记忆器存取

DMA Dominica多米尼克

英汉例句

• So, instead of catching and emulating access to physical devices below the hypervisor, new processors provide DMA address translation and permissions checking for efficient device passthrough.

  因此，新的处理器提供DMA地址转换和权限检查以实现有效的设备透传，而不是捕获并模拟对管理程序下的物理设备的访问。

• Note that all of the declared variables which will be copied using DMA are aligned on quadword boundaries and are multiples of quadwords.

  注意所有声明的变量（使用DMA复制的）都是按四字边界对齐的且都是四字的整数倍。

• It takes a tag as its only parameter, converts it to a tag mask, requests a DMA status, and then reads the status.

  它接受标签作为惟一一个参数，将它转换为标签掩码、请求dma状态然后再读取状态。

• They are used for issuing DMA commands to the memory flow controller, handling SPE events, and reading and writing messages to and from the PPE.

  它们可用来向内存流控制器发出dma命令、处理SPE事件、向PPE和从PPE读写消息。

• Once the DMA is completed, your function is done.

  一旦DMA完成，函数也即完成。

• After the transfer, you use the data in that structure to copy the string itself into your buffer in the local store using another DMA transfer, and wait for it to complete.

  传输之后，使用那个结构中的数据来将字符串自身复制到本地存储的缓存区内，方法是借助另一个dma传输并等待它完成。

• This command causes the SPE to immediately return with the status of the DMA channels.

  这个命令会导致SPE立即返回dma通道的状态。

• Remember that DMA transfers of 16 bytes or more must be in 16-byte multiples and aligned to 16-byte boundaries on both the SPE and the PPE.

  记住，传输16字节或更多字节的dma在spe和PPE上必须是16字节的整数倍，并按照16字节边界进行对齐。

• While DMA to and from the SPE is adequate for moving blocks of data, there「s often a need for the ability to send smaller messages faster.

  尽管对于向SPE中传递数据或从SPE中读取数据来说，DMA已经足以用来移动数据了，但是通常会需要具有可以快速发送更小的消息的能力。

• These all need to be quadword aligned, so that you can copy it into your main program and use the values with DMA transfers.

  而且它们都是按四字节对齐的以便能够将其复制进您的主程序并在DMA传输时使用值。

• As you may have guessed, most of the interesting parts of the program are taking place on the SPE, including all of the DMA transfers.

  正如您所猜测的那样，程序大多数有趣的部分都发生在SPE，包括所有的dma传输。

• Whether it」s an argument passed in or an address gotten some other way, the DMA targets must be aligned on cache lines (16 bytes).

  不管是传入的参数还是通过其他方式获得的地址，DMA的目标地址必须要与缓存线路(16字节)进行对齐。

• Moreover, the chip includes all the necessary plumbing to move bite-size chunks of DMA data around without any additional hardware design effort on your part.

  另外，芯片还包括了所有必需的管道技术以便随意移动少量的dma数据而且无需设计任何其他硬件。

• You use the same DMA parameters as for the last transfer, but this time it is an MFC_PUT_CMD command.

  使用相同的dma参数作最后的传输，但这次使用的是MFC_PUT _ CMD命令。

• So how does this wait for the DMA operation to complete?

  但这是如何实现等待dma操作完成的呢？

• By mapping multiple SPUs into a single process, it becomes possible to use DMA to transfer data between the local store of two SPUs directly.

  通过将多个SPU映射到一个进程中，就可以使用DMA来在两个SPU的本地存储之间直接传输数据。

• While DMA transfers are an excellent way of moving bulk data between the SPE and the PPE, another simpler method for smaller transfers which I will briefly discuss is mailboxes.

  虽然dma传输是一个很好的在SPE和PPE传输大量数据的方法，但对于小型的数据传输来说，还有另一种更为简单的方法，即邮箱，在这里简单介绍一下。

• The 「tag」 is a number which can be assigned to one or many DMA commands.

  「标签」是一个数值，可分配给一个或多个dma命令。

• Instead of having multiple directly accessible arguments, you get a pointer into main memory and the SPE has to issue DMA requests to get the pointed-to data from main memory.

  它没有使用多个可直接访问的参数，而是使用一个指向主存的指针，SPE需要发出dma请求来从主存中获取指针所指向的数据。

• Queue a DMA GETB to refill the buffer with more data after the existing data is stored back.

  对DMAGETB进行排队，从而在将现有数据存储回去之后，用更多数据重新填充缓沖区。

• For instance, one of the problems with the original code is that it is limited to the size of a DMA transfer.

  举例来说，原来代码的一个问题是一次dma传输的大小有限制。

• Finally, all DMA command names have a _cmd suffix.

  最后，所有的dma命令名都有一个_ CMD后缀。

• The SPE cannot read main memory directly, but instead must import and export data between the local store and main memory using DMA commands to a unit called the memory flow controller, or MFC.

  SPE不能直接读取主存，相反地必须通过对内存流控制器(或mfc)的单元使用dma命令来在本地存储和主存之间导入和导出数据。

• All DMA commands issued with the same tag are considered a single group, and status updates and sequencing operations apply to the group as a whole.

  所有用相同的标签发出的dma命令被认为是单一一个组，并且状态更新和排序操作都会作用于整个组。

• The SPU queues a DMA GET to pull a portion of the problem data set from main memory to a buffer.

  SPU对DMA GET进行排队，从而将涉及的数据集的一部分从主内存传输到一个缓沖区。