dma

dma

美 [ˌdi: em 'eɪ] 　英 [ˌdi: em 'eɪ]

• n.直接内存存取（全写为 direct memory access，无须使用中央处理器）
• 网络直接内存访问(Direct Memory Access)；直接存储器存取；直接存储器访问

英汉双解

英汉解释

n.	1. 直接内存访问 2. 国防部矿产管理局 3. 存贮器直接存取 4. 二甲苯胺法 5. 美国国防制图局 6. 甲胂钠

英英解释

abbr.

1. Doctor of Musical Arts

例句

An unrecognized error occurred while trying to register ownership of the hardware DMA channel assigned to this device .

注册分配给这个设备的硬件DMA频道的所有权时，出现了一个无法辨别的错误。

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。

The first copy is performed by the DMA engine, which reads file contents from the disk and stores them into a kernel address space buffer.

直接内存存取（directmemoryaccess，DMA）引擎执行了第一次拷贝（参见图1），它从磁盘中读取文件内容，然后将它们存储到一个内核地址空间缓存区中。

The tag_id allows for you to retrieve the status of the DMA operation.

tag_id让您可以检索DMA操作的状态。

In this application, you will only have one DMA command active at a time, so all of your operations will use 0 as the DMA tag.

在这个应用程序中，一次只有一个DMA命令是激活的，所以所有的操作都将使用0作为DMA标签。

Dynamic mechanical analysis (DMA) and the stress-strain behavior revealed that the system is excellent low temperature toughness.

通过对增韧体系应力应变特性和动态力学性能的研究表明，该体系具有优异的低温韧性。

Even the enhanced version of the MCS51 compatible MCU almost has no DMA ability.

即使增强板的MCS51相容微控制器也几乎缺少DMA的能力。

A DMA request always involves moving data between the SPE local store and a virtual address space on the PPE side.

DMA请求通常会涉及数据在SPE本地存储与PPE端虚拟地址空间之间进行移动。

Because DMA commands are asynchronous, it is useful to be able to wait for one to complete.

由于DMA命令是异步的，所以如能等待一个命令完成，将十分有用。

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。

Direct memory access, DMA, is a method used to bypass the CPU in these transfers, thus performing them much more quickly.

直接存储器访问就是在数据传输中绕过CPU的一种方法，因此执行起来速度很快。

Think of this as a specialized version of the C library function select, but for DMA transfers.

可以把它看作C库函数select的特殊版本，但是针对的是DMA传输。

Therefore, they cannot be accessed directly, but must be moved in through DMA.

因而，它们不能被直接访问，而必须通过DMA移进来。

The DMA channel conflicts with another device in the system. Reconfigure the adapter and software to use a different DMA channel.

DMA频道跟系统中的另一个设备有冲突。重新配置适配器和软件来使用不同的DMA频道。

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。

Independently and asynchronously, a fourth copy happens as the DMA engine passes the data from the kernel buffer to the protocol engine.

DMA引擎将数据从内核缓冲区传到协议引擎，第四次拷贝独立地、异步地发生。

The sound card cannot be found with this DMA Channel . Check your settings and try again .

声卡找不到这个端口号。请检查设置值，然后重试。

But with DMA, which uses asynchronous transmissions, the device driver needs to wait for an explicit interrupt from the NIC.

但在DMA中，也就是用户使用异步传送模式，设备驱动须要等待NIC一个清楚的中断。

Furthermore, the dedicated DMA controllers discussed above have been verified on the Modelsim and FPGA platform.

本研究所提出的专用DMA控制器通过了在Modelsim和FPGA平台下的验证。

The compiler introduces new intrinsics to do DMA transfers or other mailbox accesses, because these are not part of the C language standard.

编译器引入了一些新的特性来实现DMA传输和其他邮箱访问，这是因为这些并不是C语言标准的部分。

The organization of DMA system is illustrated on Fin3-39.

DMA系统的结构如图3-38所示。

Besides, the design and simulation of two main peripheral equipment of on-chip bus: WB arbiter and DMA controller was done.

本文还完成了片上总线两个主要外围设备：WB总线仲裁器和DMA控制器的设计和仿真验证工作。

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。

This study attempts to characterize the damping behavior of sandwich beam by a new method with dynamic mechanical analyzer(DMA).

文中通过动态力学分析仪DMA来表征三明治约束阻尼梁结构损耗因子随各种因素的变化情况。

The dynamic mechanical behavior of the cross-linked unsaturated polyester network was investigated by DMA.

用动态力学分析（DMA）对不饱和聚酯交联网络结构进行了系统研究。

That discomfort accounts, in no small measure, for the rising popularity of so-called Direct Market Access (DMA) trading systems.

这种不爽在很大程度上导致了所谓的直接市场接入（DMA）交易系统的日渐流行。

Before getting into the details of the main program, I'll explore the DMA utility functions.

在深入介绍主程序细节之前，我要先来探讨一下DMA实用函数。

The storage modulus and damping factor of composites were also characterized through dynamic mechanical analysis (DMA).

此外，采用动态力学分析（DMA）进一步表征了复合材料的储能模量和阻尼因子。

A method and apparatus for high performance volatile disk drive (VDD) memory access using an integrated direct memory access (DMA) engine.

一种方法和装置，用于使用集成直接存储器访问（DMA）引擎进行高性能易失性磁盘驱动器（VDD）存储器访问。

DMA channels that are assigned to the same priority level are handled in a round-robin manner.

被指定给相同的优先水平的直接内存存取通道以回合-知更鸟的样子被处理。

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。

The DMA engine passes data directly from the kernel buffer to the protocol engine, thus eliminating the remaining final CPU copy.

DMA引擎直接把数据从内核缓冲区传输到协议引擎，从而消除了剩下的最后一次CPU拷贝。

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。

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。

The results demonstrated that PECH-DMA could greatly enhance the removal efficiency of NTU and organic substances.

结果表明：助凝效果明显，浊度和有机物的去除效果都得到明显提高。

This will be important as you learn how to use the memory flow controller's DMA facilities.

对于学习如何使用内存流控制器的DMA工具而言，理解这些概念将会十分重要。

Graphics commands to the processor were queued to a shared DMA buffer.

给处理器的图形命令被放到一个共享的DMA缓冲中并排队。

An MFC can have multiple concurrent DMA requests to one address space outstanding from both the PPE and the SPU.

MFC可以具有对同一个地址空间的多个并发的DMA请求，这些请求可以来自于PPE和SPU。

In the article, we introduce each module of DMA controller custom logic including the interface and the state machine.

本文很详细地介绍了DMA控制用户逻辑的各个模块，包括其接口和状态机。

Once a data access request is detected, a VDD driver may issue a DMA data request to perform the data access request from the VDD.

一旦检测到数据访问请求，VDD驱动器可以发出DMA数据请求以执行来自VDD的数据访问请求。

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。