Each send() call will cause a new skb to be allocated from a cache. the caches are of fixed size, and do not grow (afaik, but the allocator can pick from higher order pool). The skbs are reclaimed by the cache when the stack is done with them. If the cache is exhausted when we call alloc_skb, userspace will get ENOMEM.
i think you can check the cache fill level in /proc/slabinfo. other useful commands are slabtop and slabinfo //E On Jul 20, 2016 5:14 PM, "Rune Torgersen" <ru...@innovsys.com> wrote: > Hi, just a simple question. > What would make sendto() to a tipc RDM socket (destination being a local > node address) (packet size 18000 to 40000 bytes) return a ENOMEM? > > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and > traffic > patterns at an interface-level. Reveals which users, apps, and protocols > are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity > planning > reports.http://sdm.link/zohodev2dev > _______________________________________________ > tipc-discussion mailing list > tipc-discussion@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/tipc-discussion > ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ tipc-discussion mailing list tipc-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tipc-discussion
