# Re: \[PATCH 2.6.21-rt2\] PowerPC: decrementer clockevent driver

- From: Paul Mackerras \<hidden\>
- Date: 2007-05-19 03:34:56 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2007/05/957696
- Thread: https://ratatoskr.run/lkml/2007/05/957088/t.md

```text
Sergei Shtylyov writes:

>     Yeah, the classic decrementer is programmed off-by-one.

Actually it's programmed off by slightly less than one half on
average, but it doesn't matter since the error doesn't accumulate.

Paul.
```