Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28

Christoph Lameter
2008-11-19T19:43:12Z

On Mon, 17 Nov 2008, Ingo Molnar wrote:

> Christoph, as per the recent analysis of Mike:
>
> http://fixunix.com/kernel/556867-regression-benchmark-throughput-loss-a622cf6-f7160c7-pull.html
>
> all scheduler components of this regression have been eliminated.
>
> In fact his numbers show that scheduler speedups since 2.6.22 have
> offset and hidden most other sources of tbench regression. (i.e. the
> scheduler portion got 5% faster, hence it was able to offset a
> slowdown of 5% in other areas of the kernel that tbench triggers)

Ok will rerun the tests tomorrow. Just got back from SC08 need some time
to catch up.

Looks like a lot of work was done on this issue. Thanks!