PdhExpandWildCardPath 返回太多路径
我试图获取我的（Delphi XE）应用程序中每个（最多 200 个）线程的 CPU 利用率。为此，我向 PdhExpandWildCardPath 传递一个字符串 '\Thread(myappname/*)\% Processor Time'。然而（在 Win7/64 上）从此函数返回的缓冲区为系统中运行的每个线程返回一个字符串，换句话说，它似乎将输入视为 '\Thread(*/*)\ %处理器时间'。这是出乎意料的。当我随后扩展字符串以获得“ID Thread”时，也会发生同样的情况。
显然，我可以过滤应用程序名称上的结果字符串，并且仅添加我需要的计数器，但这需要数百次子字符串扫描。我是否误解了通配符的工作原理？
I am trying to obtain the CPU utilization of each of the (up to 200) threads in my (Delphi XE) application. To prepare for this I pass to PdhExpandWildCardPath a string '\Thread(myappname/*)\% Processor Time'. However (on Win7/64) the buffer returned from this function returns a string for every thread running in the system, in other words it seems to have treated the input as if it were '\Thread(*/*)\% Processor Time'. This was unexpected. The same happens when I subsequently expand a string to get 'ID Thread'.
Obviously I can filter the resulting strings on the application name and only add the counters I need, but this requires many hundreds of substring scans. Have I misinterpreted how the wildcards work?
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晚了，但我也遇到了同样的问题，也许其他人需要它：
这里是：
'\Thread(myappname*)\% Processor Time'对于 ProcessNameFormat 设置为 2 和 ThreadNameFormat 设置特别有用到
'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PerfProc\Performance'中的 2对于 ProcessNameFormat = 2 -> 链接，同样适用于 ThreadNameFormat，尽管我不能找到任何类型的文档。
Late, but I've hit the same wall, maybe someone else needs it:
Here it is:
'\Thread(myappname*)\% Processor Time'Especially useful with ProcessNameFormat set to 2 and ThreadNameFormat set to 2 in
'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PerfProc\Performance'For ProcessNameFormat = 2 -> link, same applies for ThreadNameFormat, although I couldn't find any kind of documentation.