I use flow graph for `file sink` as below:  

[![enter image description here](https://i.stack.imgur.com/cOEA5.png)](https://i.stack.imgur.com/cOEA5.png)
When I stop running this flow graph, there are `110000` float numbers in file `a`,with 10k per segment.  

`samp rate` is `32k`,`a` should append `32k` numbers each second.

But`110000` is not integer multiple of `32k`.What's the reason?