Messages in this thread | | | Date | Fri, 24 Jun 2005 10:28:54 +0530 | From | Dipankar Sarma <> | Subject | Re: [PATCH] dst numa: Avoid dst counter cacheline bouncing |
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On Thu, Jun 23, 2005 at 08:10:06PM -0700, Christoph Lameter wrote: > The dst_entry structure contains an atomic counter that is incremented and > decremented for each network packet being sent. If there is a high number of > packets being sent from multiple processors then cacheline bouncing between > NUMA nodes can limit the tcp performance in a NUMA system. > > The following patch splits the usage counter into counters per node. >
Do we really need to do a distributed reference counter implementation inside dst cache code ? If you are willing to wait for a while, we should have modified Rusty's bigref implementation on top of the interleaving dynamic per-cpu allocator. We can look at distributed reference counter for dst refcount then and see how that can be worked out.
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