Hi Aaron, I just searched the core GPFS source code. I didn't find TCP_QUICKACK being used explicitly.
Regards, The Spectrum Scale (GPFS) team ------------------------------------------------------------------------------------------------------------------ If you feel that your question can benefit other users of Spectrum Scale (GPFS), then please post it to the public IBM developerWroks Forum at https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479. If your query concerns a potential software error in Spectrum Scale (GPFS) and you have an IBM software maintenance contract please contact 1-800-237-5511 in the United States or your local IBM Service Center in other countries. The forum is informally monitored as time permits and should not be used for priority messages to the Spectrum Scale (GPFS) team. From: "Knister, Aaron S. (GSFC-606.2)[InuTeq, LLC]" <aaron.s.knis...@nasa.gov> To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org> Date: 08/13/2018 02:48 PM Subject: [gpfsug-discuss] TCP_QUICKACK Sent by: gpfsug-discuss-boun...@spectrumscale.org 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 _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
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