Date: Fri, 1 Jan 2021 07:19:18 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Victor Gamov <vit@otcnet.ru>, freebsd-net@freebsd.org Subject: Re: 'dropped due to full socket buffers' by SNMP Message-ID: <7e51a6be-aea1-51c6-c0bd-10d00c19d5d3@grosbein.net> In-Reply-To: <fef04bda-6aa0-4a80-8999-867b9f37d766@otcnet.ru> References: <388da9a7-7b89-89b2-54eb-17d0e818c924@otcnet.ru> <4e41c1d2-19bc-0345-0b03-526e4cb785c7@otcnet.ru> <b279e676-c789-2978-98a0-b8a4b164a111@grosbein.net> <a69d872a-f21e-de66-7677-58beccb0f023@otcnet.ru> <6c780827-e764-8053-356b-a921e0892c15@grosbein.net> <fef04bda-6aa0-4a80-8999-867b9f37d766@otcnet.ru>
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30.12.2020 23:08, Victor Gamov wrote: > As I understand hw.ix.flow_control=3 to allow flow-control for negotiation. > Real PAUSE setting will be set during negotiation. At the moment of congestion. > So where I can find active flow-control setting for host interface? Can't check for ix just now, but for em(4) there is sysctl dev.em.0.fc. It should be similar for ix. >> maybe increase kern.ipc.maxsockbuf and then net.inet.udp.recvspace. > Eugene, at first message you suppose Host-A (sender) "outgoing link for that UDP packets is congested" > because this host shows non-zero "dropped due to full socket buffers". > So is net.inet.udp.recvspace increasing on Host-B (mainly receiver) will be affected for this congestion? Can't tell in details without going deep into your setup :-) You can try it yourself and verify quickly. > Or I need to try to increase both kern.ipc.maxsockbuf and net.inet.udp.recvspace on both hosts? Tune one that drops UDP. > Also how I can check current sockbuf usage? netstat -xn
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