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Beginner
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how to analyse beyond IOCTL?


In my application drivers call through ioctl call dominated
the execution (> 96%)

Unfortunately vtune don't go beyond ioctl in its report.

What should I do, please advise,

Thanks,

Eric
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2 Replies
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Hey Eric,

I'm going to poke around the developer's white boards on this one. Stay tuned.

jdg

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Hey eltarari,

Are you using call graph? (It's true that call graph can't trace IOCTL into ring 0, and therefore you don't get a trace of the rest of the call, which seems to be what you're describing.)

Instead of callgraph, consider trying sampling to see if you can get more useful information that way.

Let us know if this makes sense, and what you find if/when you try it.

cheers

jdg

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