Shark on MacBook Air
Shark on MacBook Air
- Subject: Shark on MacBook Air
- From: David Dunham <email@hidden>
- Date: Wed, 20 Feb 2008 10:45:33 -0800
I started doing some performance analysis of a game that uses OpenGL,
and happened to be using a MacBook Air. I'm seeing results very
different than I'd expect:
0.0% 81.8% mach_kernel dtrace_get_cpu_int_stack_top
Most of this time is in
0.1% 79.8% com.apple.driver.AppleIntelGMAX3100
IOIntel965GLContext::clientMemoryForType(unsigned long, unsigned
long*, IOMemoryDescriptor**)
So maybe integrated video (as opposed to a separate card) is sucking
up all the CPU. But the part that seems surprising is that it's in
dtrace. 1) I thought that was supposed to be low overhead; 2) I've
never seen Shark report a lot of time spent gathering performance data
Is this normal?
David Dunham
Voice/Fax: 206 783 7404 http://www.pensee.com/dunham/
Imagination is more important than knowledge. -- Albert Einstein
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