[gpfsug-discuss] TCP_QUICKACK

[Knister, Aaron S. (GSFC-606.2)[InuTeq, LLC]]

This is a question mostly for the devs. but really for anyone who can answer.

Does GPFS use the TCP_QUICKACK socket flag on Linux?

I’m debugging an IPoIB problem exacerbated by GPFS and based on the packet captures it seems as though the answer might be yes, but I’m curious if GPFS is explicitly doing this or if there’s just a timing window in the RPC behavior that just makes it look that way.

-Aaron



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