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SubjectRe: [PATCH] x86: Run checksumming in parallel accross multiple alu's

* Andi Kleen <> wrote:

> Neil Horman <> writes:
> > Sébastien Dugué reported to me that devices implementing ipoib (which
> > don't have checksum offload hardware were spending a significant
> > amount of time computing
> Must be an odd workload, most TCP/UDP workloads do copy-checksum
> anyways. I would rather investigate why that doesn't work.

There's a fair amount of csum_partial()-only workloads, a packet does not
need to hit user-space to be a significant portion of the system's

That said, it would indeed be nice to hear which particular code path was
hit in this case, if nothing else then for education purposes.


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