Unfortunately, this approach itself can become a performance bottleneck if the size of the data requested is considerably larger than the kernel buffer size.
不幸的是，如果所需数据量远大于内核缓冲区大小的话，这个方法本身可能成为一个性能瓶颈。
These changes all work together to produce a memory manager in the 2.6 kernel designed for better performance, efficiency, and stability.
这些变化一起促生了2.6内核中的内存管理器，它的设计目标是更高的性能、效率和稳定性。
However, with the major changes in libraries and kernel versions, a recompile from source is probably the best option for a developer trying to get optimal performance out of their application.
不过，由于程序库和内核版本的重要变化，对尝试优化自己应用程序性能的开发人员来说，重新编译源代码可能是最好的选择。
This real data demonstrates that a variety of features and changes have helped the 2.6 kernel offer better scalability and performance and become more mature for enterprise-level applications.
这一真实的数据证明多种特性和变化帮助2.6内核具备了更好的可扩展性和性能，同时更成熟地用于企业级应用程序。
This section gives some examples of new features of the 2.6 kernel and POWER6 architecture that could improve an application's performance.
这个小节提供一些例子，它们展示能够改进应用程序性能的2.6内核新特性和POWER 6架构。
This section provides some examples of new features of the 2.6 kernel and POWER5 architecture from which an application's performance could benefit.
这一节将给出2.6内核以及POWER 5架构的新特性的一些示例，这些新特性有益于提高应用程序的性能。
You can get soft real-time performance from the standard kernel or, with a little more work (kernel patch), you can build hard real-time applications.
从标准内核中您可以实现软实时功能，再执行一些额外的工作(内核补丁)您就可以构建硬实时应用程序。
Zero copy greatly improves application performance and reduces the number of context switches between kernel and user mode.
零拷贝不仅大大地提高了应用程序的性能，而且还减少了内核与用户模式间的上下文切换。
Building a kernel that is capable of protecting against itself is difficult, and usually has a large negative impact on performance.
构建一个具有防护来自自身攻击能力的内核很困难，并且通常这会对性能产生很大的负面影响。
These applications will also pick up the performance enhancements that go along with the 2.6 kernel, as described earlier in this paper.
这些应用程序也会获得如本文前面所描述的伴随2.6内核而来的性能提高。
That cost is slightly lower throughput and a small reduction in kernel performance because of the added overhead of the CONFIG_PREEMPT option.
代价就是略微减低了吞吐量以及内核性能，原因是CONFIG_PREEMPT选项增加了开销。
Today, in the 2.6 kernel, you can get soft real-time performance through a simple kernel configuration to make the kernel fully preemptable (see Figure 6).
今天，在2.6内核中，通过对内核进行简单配置使其完全可抢占(见图6)，您就可以得到软实时功能。
Operating system-level virtualization requires changes to the operating system kernel, but the advantage is native performance.
操作系统级的虚拟化要求对操作系统的内核进行一些修改，但是其优点是可以获得原始性能。
This significantly improves performance when the requested data amount is less than the kernel buffer size.
这在所需数据量小于内核缓冲区大小时极大地提高了性能。
Interestingly, you won't notice a performance hit for LKMs, so they're a powerful means of creating a lean kernel that ADAPTS to its environment based upon the available hardware and attached devices.
有趣的是，对于lkm来说，我们不会注意到有什么性能方面的差异，因此这对于创建一个适应于自己环境的内核来说是一种功能强大的手段，这样可以根据可用硬件和连接的设备来加载对应的模块。
With kernel 2.4.10, the 2.4 series reached a new level of performance and scalability (something that we've been anticipating for a long time).
随着内核2.4.10的出现，在性能和可伸缩性方面，2.4系列达到了新的层次(这是我们盼望已久的)。
While applications in general will see performance gains from the kernel level NUMA support, additional gains may be achieved by compiling against these user-land API's.
虽然通常可以发现应用程序可以因内核级NUMA支持而获得性能提高，但是使用这些用户空间api进行编译能够获得进一步的提高。
The biggest write performance effects occurred with small file creation (extracting the kernel tarball).
小型文件创建操作会产生最大的写性能影响(提取内核原始码)。
The code is being ported to the 2.6 kernel, so you should check the Performance Inspector site for the most up-to-date information.
代码正在被移植到2.6内核，所以您应该查看PerformanceInspector站点以获得最新的信息。
64-bit kernel for higher scalability and performance.
位内核，提供更好的可伸缩性和性能。
In fact, he dismissed it as academic and potentially harmful to performance, so the early Linux kernel was designed entirely without consideration for other architectures or possible porting.
实际上，他认为这是一个学术性的问题，而且可能对性能有害，所以早先的Linux内核设计完全没有考虑其他架构或可能的移植。
The new O(1) scheduler in the 2.6 kernel is a great benefit to performance, even when a large number of tasks exists.
内核中新的O(1)调度程序对性能有很大的提升，即使存在很多任务的情况下也是如此。
The 2.6 kernel contained in RHEL4 and SLES9 provides these other performance improvements.
RHEL4和SLES9中所使用的2.6内核具有这些其他方面的性能改进。
Towards that end we are constantly testing our builds on the latest Linux kernel versions available and tracking down the performance roadblocks.
为此，我们经常在最新的Linux内核版本上测试我们的Domino，并跟踪性能障碍。
The OSDL's Linux Kernel Scalable Test Platform (STP) provides a framework where developers can test kernel patches against an online performance and scalability suite.
OSDL 的Linux Kernel Scalable Test Platform（STP）提供了一个框架，开发者可以通过它使用一个在线的性能和可扩展性套件来测试内核补丁。
For performance tuning, you might need to adjust other kernel parameters. The manual procedure is as follows.
在性能调优时，可能还需要调整其他内核参数。
The 2.6 kernel and the POWER5 architecture contain features that can improve an application's performance.
内核和POWER5架构都具有可以提高应用程序性能的特性。
NUMA is another major feature that has been added in the Linux 2.6 kernel to improve system performance.
NUMA是为提高系统性能添加到Linux 2.6内核的另一个主要特性。
The Block I/O Layer in the 2.6 kernel has been rewritten to improve kernel scalability and performance.
内核中的块I/O层被重写，以提高内核的可扩展性和性能。
This article looks at the SACK implementation and its performance under non-ideal conditions starting with Linux 2.6.22, which is currently used as a common distribution kernel on Ubuntu 7.10.
本文将观察SACK实现及其在非理想条件下的性能，我们将从Linux2.6.22入手，它目前是Ubuntu 7.10的普通发行版内核。
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