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Subject: Re: [OMPI devel] kernel 2.6.23 vs 2.6.24 - communication/wait times
From: Eugene Loh (eugene.loh_at_[hidden])
Date: 2010-04-10 01:16:37


Bogdan Costescu wrote:
On Sat, Apr 10, 2010 at 5:51 AM, Eugene Loh <eugene.loh@oracle.com> wrote:
  
Why is shared-memory performance about four orders of magnitude slower than
it should be?
    
Have there been any process scheduler changes in the newer kernels ?
I'm not sure that they could explain four orders of magnitude
differences though...
Plus, the TCP numbers seem okay.  So, it doesn't feel like that or process-binding issues.