Re: [PATCH] Performance regression in 2.6.7-rc3

Nick Piggin
2004-06-16T03:08:24Z

Herbert Xu wrote:
> Martin J. Bligh <mbligh@aracnet.com> wrote:
>
>>How the hell can that have any effect on non-threaded workloads? Perhaps
>>some part of kernel compile *is* multi-threaded. It does seem to get
>
>
> make(1) with vfork(2) perhaps?

I think balance on clone probably needs to be turned off by default
presently.

It slows down a simple thread creation test by a factor of 7(!) here,
and has quite a few not too difficult to imagine performance problems.