Oprofile是一种细粒度的工具，可以为指令集或者为函数、系统调用或中断处理例程收集采样。

OProfile is fine-grained and can collect samples for a set of instructions, or for function, system call, or interrupt handlers.

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提出的算法不用计算b -样条函数的显式值，而是利用B -样条的尺度关系计算采样点的值，具有一致且简单的编码。

New algorithm need not directly compute values of B-spline interpolatory function, the values were computed using B-spline scaling relation on sampling points, which had simple and uniform coding.

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在很多场合只好用有间隙采样做阿仑方差，然后用巴勒斯偏函数加以修正，其繁杂程度是可想而知的。

In many cases, Allan variance has to be measured with dead time and then modified with Barnes bias function.

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