I've disabled TSO a while ago, after my networking stopped working completely, with `ifconfig em0 -tso`.
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000 options=4209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO> ether 00:25:90:dc:0f:a2 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: Ethernet autoselect (1000baseT <full-duplex>) status: active nfsv212: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=3<RXCSUM,TXCSUM> ether 00:25:90:dc:0f:a2 inet6 fe80::225:90ff:fedc:fa2%nfsv212 prefixlen 64 scopeid 0x6 inet6 fd::212:31:3:111:fffe prefixlen 64 nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> media: Ethernet autoselect (1000baseT <full-duplex>) status: active vlan: 212 parent interface: em0 nfsv308: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000 options=3<RXCSUM,TXCSUM> ether 00:25:90:dc:0f:a2 inet 10.38.0.253 netmask 0xffffff00 broadcast 10.38.0.255 inet6 fe80::225:90ff:fedc:fa2%nfsv308 prefixlen 64 scopeid 0x8 inet6 fd:308::30 prefixlen 64 nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> media: Ethernet autoselect (1000baseT <full-duplex>) status: active vlan: 308 parent interface: em0 Or should I disable VLAN_HWTSO as well. If so, how? Met vriendelijke groeten, -- Kerio Operator in de Cloud? https://www.kerioindecloud.nl/ Mark Schouten | Tuxis Internet Engineering KvK: 61527076 | http://www.tuxis.nl/ T: 0318 200208 | i...@tuxis.nl Van: Chris Forgeron <cforge...@acsi.ca> Aan: Mark Schouten <m...@tuxis.nl>, "freebsd-net@FreeBSD.org" <freebsd-net@FreeBSD.org> Verzonden: 28-4-2015 13:58 Onderwerp: RE: Frequent hickups on the networking layer What network care are you using? There have been a few reports of issues with TSO, if you check the list. I had some myself a while ago, but are now resolved thanks to a few helpful folk here. You could increase your mbufs, but if the problem is a leak/error in the stack, then you're just delaying the behaviour. -----Original Message----- From: owner-freebsd-...@freebsd.org [mailto:owner-freebsd-...@freebsd.org] On Behalf Of Mark Schouten Sent: Tuesday, April 28, 2015 5:48 AM To: freebsd-net@FreeBSD.org Subject: Frequent hickups on the networking layer Hi, I've got a FreeBSD 10.1-RELEASE box running with iscsi on top of ZFS. I've had some major issues with it where it would stop processing traffic for a minute or two, but that's 'fixed' by disabling TSO. I do have frequent iscsi errors, which are luckily fixed on the iscsi layer, but they do cause an occasional errormessage on both the iscsi client and server. Also, I see input errors on the FreeBSD server, but I'm unable to find out what those are. I do see a relation between iscsi-errormessages and the number of ethernet inputerrors on the server. I saw this message [1] which made me have a look at `vmstat -z`, and that shows me the following: vmstat -z | head -n 1; vmstat -z | sort -k 6 -t , | tail -10 ITEM SIZE LIMIT USED FREE REQ FAIL SLEEP zio_data_buf_94208: 94208, 0, 162, 5, 135632, 0, 0 zio_data_buf_98304: 98304, 0, 118, 9, 101606, 0, 0 zio_link_cache: 48, 0, 6, 30870,24853549414, 0, 0 8 Bucket: 64, 0, 145, 2831,148672720, 11, 0 32 Bucket: 256, 0, 859, 731,231513474, 52, 0 mbuf_jumbo_9k: 9216, 604528, 7230, 2002,11764806459,108298123, 0 64 Bucket: 512, 0, 808, 352,147120342,16375582, 0 256 Bucket: 2048, 0, 500, 50,307051808,189685088, 0 vmem btag: 56, 0, 1671605, 1291509,198933250,36431, 0 128 Bucket: 1024, 0, 410, 106,65267164,772374, 0 I am using jumboframes. Could it be that the inputerrors AND my frequent hickups come from all those failures to allocate 9k jumbo mbufs? And can I increase the in [1] mentioned sysctls at will? Thanks [1]: https://lists.freebsd.org/pipermail/freebsd-questions/2013-August/252827.html Met vriendelijke groeten, -- Kerio Operator in de Cloud? https://www.kerioindecloud.nl/ Mark Schouten | Tuxis Internet Engineering KvK: 61527076 | http://www.tuxis.nl/ T: 0318 200208 | i...@tuxis.nl
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