Normal CoreAudio output
Normal CoreAudio output
- Subject: Normal CoreAudio output
- From: Jeremy Sagan <email@hidden>
- Date: Thu, 27 Sep 2007 16:56:57 -0400
Out of curiosity I was checking the shark time profile for my
application and I noticed that the CoreAudio output thread on my
10.4.10 Intel IMac seems to spend about 12.3% of its time in a
procedure called 'equalizer' and 6% in dynamicRangeControl. Similar
numbers occur on a separate CoreAudio input thread. Is this normal?
Those sound like plug-ins. Is there a way to avoid this processing?
Here is an excerpt of my shark output:
358.6 ms 33.2% com.apple.driver.AppleHDA SInt16ToFloat32
356.7 ms 33.1% mach_kernel ml_set_interrupts_enabled
132.6 ms 12.3% com.apple.driver.AppleHDA equalizer
0.0 ns 12.3% com.apple.driver.AppleHDA DSP_Equalizer::process
(float*, unsigned long)
64.3 ms 6.0% com.apple.driver.AppleHDA dynamicRangeControl
0.0 ns 5.9% com.apple.driver.AppleHDA
DSP_DynamicRangeControl::process(float*, unsigned long, unsigned long)
0.0 ns 0.1% com.apple.driver.AppleHDA DSP_MultibandDRC::process
(float*, unsigned long)
15.1 ms 1.4% mach_kernel lo_mach_scall
Jeremy Sagan
Sagan Technology
www.sagantech.biz
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