Messages in this thread | | | From | (Eric W. Biederman) | Subject | Re: 2.6.19-rc4: known unfixed regressions (v3) | Date | Sun, 05 Nov 2006 08:22:20 -0700 |
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Adrian Bunk <bunk@stusta.de> writes:
> > Subject : x86_64: NR_IRQ increase causes 11.5% slowdown > in lmbench's fork benchmark > References : http://lkml.org/lkml/2006/11/2/192 > Submitter : Tim Chen <tim.c.chen@linux.intel.com> > Caused-By : Eric W. Biederman <ebiederm@xmission.com> > commit 550f2299ac8ffaba943cf211380d3a8d3fa75301 > Handled-By : Eric W. Biederman <ebiederm@xmission.com> > Andi Kleen <ak@suse.de> > Status : problem is being debugged
Currently I'm at a loss why the cross cpu fork lm_bench numbers should get worse when you simply double NR_IRQS. As far as I can determine nothing on that code path is directly affected by that change.
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