无论如何，有没有在OS X Mountain Lion上读取性能计数器的信息? [英] Is there anyway to read performance counters on OS X Mountain Lion?

问题描述

Shark是Apple的探查器，可用于配置自定义性能计数器，但由于它无法运行32位内核，因此在OSX Mountain Lion中不再受支持.苹果公司(Apple)替代鲨鱼(Shark)的Instruments.app似乎不支持读取性能计数器，例如L1缓存命中/未命中**.无论如何，有没有在OS X上实际设置和读取性能计数器的信息?即使没有应用程序，是否也有一些用户界面API可以做到这一点?

Shark, Apple's profiler which let you configure custom performance counters, is no longer supported in OSX Mountain Lion since it can't run a 32-bit kernel. Instruments.app, Apple's replacement for Shark, doesn't seem to support reading performance counters such as L1 cache hits/misses**. Is there anyway to actually setup and read performance counters on OS X? Even if there is no application, is there some user-land API to do this?

** Instruments.app似乎确实具有用于性能计数器的界面，但是在我的Retina MacBook Pro上，"PM事件"窗口未列出任何事件，并指示设备:未知".乐器还有其他选择吗?

**Instruments.app does seem to have an interface for performance counters, but on my Retina MacBook Pro, the PM Events window lists no events, and indicates "Device: Unknown." Are there any other alternatives to Instruments?

推荐答案

是的.在那里，但是很难找到并且使用起来很笨拙(版本4.5).

Yes. It's there, but difficult to find and clumsy to use (ver.4.5).

• 启动仪器.
• 向导向您致意
• 为OS X选择空白"模板
• 按cmd + L显示库
• 将"Counters"工具添加到"Instruments"文档
• 按cmd + shf + P-将显示PM Events浮动窗口.
• 让我们评估已执行的划分操作"-将已执行的划分操作"添加到"PM事件"窗口的搜索字段中.
• 现在将已执行划分操作"的状态"设置为可见"
• 现在返回主文档窗口，按cmd + I以显示"Counters"工具的信息弹出窗口.
• 按下+按钮
• 将新计数器的事件设置为划分执行的操作"
• 开始采样...
• 结束采样...

• Launch Instruments.
• You are greeted by the Wizard
• Choose "Blank" template for OS X
• Press cmd+L to display the Library
• Add "Counters" instrument to your Instruments document
• Press cmd+shf+P -- you are presented with the PM Events floating window.
• Let's evaluate "Divide Operations executed" -- Add "Divide Operations executed" to the PM Events window's search field.
• Now set the "State" of "Divide Operations executed" to "Visible"
• Now back to the main document window, press cmd+I to display the info popover of the "Counters" instrument.
• Press the + button
• Set the new Counter's event to "Divide Operations executed"
• Begin sampling...
• End sampling...

您将在Instruments的表列中看到结果.当然，您可以记录许多事件-因此，找到您感兴趣的L1缓存事件并添加它们而不是除法.

You will see the results in Instruments' table columns. Of course, there are many events you could record -- So find the L1 cache events you are interested in and add them instead of divides.

还应做好系统冻结的准备(在撰写本文时发生了一次).

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