Date: Fri, 22 Jun 2018 18:58:50 -0400 From: Mark Saad <nonesuch@longcount.org> To: freebsd-stable@freebsd.org Subject: Anyone have a summary of what kernel option RSS does ? / netisr oddness . Message-ID: <FB159BD7-811F-4CF4-B57A-25FD9849FAFD@longcount.org>
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Hi all On a recount 11-STABLE I see that the interaction with netisr and rss has changed. Forgive me if this is clumsy but I don’t quite get what changes were. On 10-Stable when I have a solarflare or intel Ixgbe card I would get a kernel thread per rss queue per card and a netirs queue:bucket thread per cpu ( or tuned to a value I define < ncpus ) . However on recent 11-STABLE about when the RSS kernel option was imported or added; I now get one netisr queue:bucket for the whole system and no tuning effects how many threads are created. Second part I started looking into the kernel rss option and I wanted the better understand what it was doing ? Enabling it and the associate protocol block ? Option gave me 64 queues and no clear way to tune them or constrain them to the numa domain of the card companies consuming them I could not find options_rss.h either . So is there a commit anyone can direct me to to for more insight? Is there a write up on it somewhere? Thanks again . --- Mark Saad | nonesuch@longcount.orghome | help
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