SCX eBPF function log2_u32
The log2_u32 function computes the base 2 logarithm of a 32-bit exponential value.
Definition
static inline u32 log2_u32(u32 v)
{
u32 r;
u32 shift;
r = (v > 0xFFFF) << 4; v >>= r;
shift = (v > 0xFF) << 3; v >>= shift; r |= shift;
shift = (v > 0xF) << 2; v >>= shift; r |= shift;
shift = (v > 0x3) << 1; v >>= shift; r |= shift;
r |= (v >> 1);
return r;
}
Usage
Compute the base 2 logarithm of a 32-bit value.
Parameters
v: The value for which we're computing the base 2 logarithm.
Example
Docs could be improved
This part of the docs is incomplete, contributions are very welcome