system-profiler | 易学教程

Obtaining a Mac's System Profiler data from shell

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问题 How can I retrieve the information shown in the Mac's System Profiler app programatically? I'm actually interested in the USB section if that matters. 回答1: Take a look at the system_profiler(8) command. 回答2: The OSX command line tool "ioreg" might give you want you want. man ioreg ioreg displays the I/O Kit registry. It shows the heirarchical registry as an inverted tree. Also if you can/want to use Cocoa look at IOKit. IOKit is the OSX framework that talks to USB hardware. 来源： https:/

What is Hard Faults in XPerf

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问题 I'm trying to profile a system with XPerf. And see that performance problems occurs when there is activity in HardFaults ! But what I cant figure out and find in google what are these Hard Faults that xperf shows. What are they related to? What do they indicate? Is there any universal remedy for such situations? Hard faults table 回答1: Indeed. "First of all, a "hard fault" was previously called a "page fault" in earlier versions of Windows. Perhaps page faults were more easily understood from

What is Hard Faults in XPerf

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I'm trying to profile a system with XPerf. And see that performance problems occurs when there is activity in HardFaults ! But what I cant figure out and find in google what are these Hard Faults that xperf shows. What are they related to? What do they indicate? Is there any universal remedy for such situations? Hard faults table Indeed. "First of all, a "hard fault" was previously called a "page fault" in earlier versions of Windows. Perhaps page faults were more easily understood from the name, too. A hard fault happens when the address in memory of part of a program is no longer in main