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Re: [Discuss-gnuradio] Oprofile from a flow graph running on an OMAP3
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From: |
Johnathan Corgan |
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Subject: |
Re: [Discuss-gnuradio] Oprofile from a flow graph running on an OMAP3 |
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Date: |
Sat, 11 Oct 2008 11:45:34 -0700 |
On Sat, 2008-10-11 at 14:38 -0400, Philip Balister wrote:
> Anyone know what the std::vector<float, std::allocator<float>
> >::operator[](unsigned int) call does?
That is the array deference operator for the an STL vector of floats:
v = std::vector<float>(...)
int pos = ...
float f = v[pos]
This last results in the call to the function you quoted.
I'm not an ARM architecture expert, but I would suspect unaligned memory
access is resulting in the enormous amount of time spent here.