Re: Epic regression in throughput since v2.6.23

From: Serge Belyshev
Date: Tue Sep 08 2009 - 18:15:46 EST


Serge Belyshev <belyshev@xxxxxxxxxxxxxxxxx> writes:
>[snip]

I've updated the graphs, added kernels 2.6.24..2.6.29:
http://img186.imageshack.us/img186/7029/epicmakej4.png

And added comparison with best-performing 2.6.23 kernel:
http://img34.imageshack.us/img34/7563/epicbfstips.png

>
> Conclusions are
> 1) mainline has severely regressed since v2.6.23
> 2) BFS shows optimal performance at make -jN where N equals number of
> h/w threads, while current mainline scheduler performance is far from
> optimal in this case.
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