opencl Atomic Operations
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Syntax
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int atomic_add ( volatile __global int *p , int val)
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unsigned int atomic_add ( volatile __global unsigned int *p , unsigned int val)
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int atomic_add ( volatile __local int *p , int val)
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unsigned int atomic_add ( volatile __local unsigned int *p ,unsigned int val)
Parameters
| p | val |
|---|---|
| pointer to cell | added to cell |
Remarks
Performance depends on atomic operations number and memory space. Doing serial work almost always slows kernel execution because of gpu being a SIMD array and each unit in an array waits other units if they don't do same type of work.
