Messages in this thread | | | Date | Mon, 27 Aug 2012 18:08:54 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH 2/2] oprofile: Remove 'WQ on CPUx, prefer CPUy' warning |
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On Fri, Aug 24, 2012 at 08:53:31PM +0200, Robert Richter wrote: > Under certain workloads we see the following warnings: > > WQ on CPU0, prefer CPU1 > WQ on CPU0, prefer CPU2 > WQ on CPU0, prefer CPU3 > > It warns the user that the wq to access a per-cpu buffers runs not on > the same cpu. This happens if the wq is rescheduled on a different cpu > than where the buffer is located. This was probably implemented to > detect performance issues. Not sure if there actually is one as the > buffers are copied to a single buffer anyway which should be the > actual bottleneck. > > We wont change WQ implementation. Since a user can do nothing the > warning is pointless. Removing it.
Looks good to me.
Acked-by: Andi Kleen <ak@linux.intel.com>
-Andi
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