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Re: performance issues during build.sh -j 40 kernel
On Sun, Sep 10, 2017 at 07:17:51PM +0200, Joerg Sonnenberger wrote:
> That's true, but changing this also has quite a significant downside on
> some workloads for second order effects. I don't think it is a good idea
> to change this right now, as it doesn't even fix the real problem.
Just to quantify this part, for a current release build on tmpfs, I see:
After with longer spin off:
Time is in seconds. So adding the cacheline alignment slows the system
down by 8% on average. That's a -j32 release on a dual Xeon.
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