Date: Tue, 19 Jan 2016 10:03:42 +0100 From: Gerrit =?ISO-8859-1?Q?K=FChn?= <gerrit.kuehn@aei.mpg.de> To: freebsd-net@freebsd.org Cc: "carsten.aulbert@aei.mpg.de" <carsten.aulbert@aei.mpg.de> Subject: ix hangs (almost) Message-ID: <20160119100342.7c458ee5406ba10362237cd0@aei.mpg.de>
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Hi all,
Half a year ago we had reported here about issues with ix-interfaces when
transporting data over nfs. We only got about 50MByte/s back then, and
were not able to fix this issue. Instead, we went for rsyncd transport
that gave us about 200MByte/s (still not the full bandwidth, but
definitely better than nfs).
Now we recognize strange "hangs" in these sessions:
We do nightly backups on this link, and it works fine for days, sometimes
even weeks. Then suddenly the whole network traffic slows down almost to a
full halt. Write speeds (both rsyncd and nfs) go down to a few kByte/s. I
see no error messages, no bad packets, nothing that would indicate a reason
for this.
The issue goes away (for some time) when doing ifconfig ix0 down/up, but
comes back after some days.
Any suggestions on how to debug this (when it happens next) are highly
appreciated. If it looks like this is interface/driver-related, I'll also
take suggestions on what different 10GE (copper) card to try instead.
FreeBSD crest 10.2-RELEASE-p7 FreeBSD
10.2-RELEASE-p7 #0: Mon Nov 2 14:19:39 UTC 2015
root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
ix0@pci0:5:0:0: class=0x020000 card=0x00028086 chip=0x15288086 rev=0x01
hdr=0x00 vendor = 'Intel Corporation' device = 'Ethernet
Controller 10-Gigabit X540-AT2' class = network
subclass = ethernet
ix0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8404bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,LRO,VLAN_HWTSO>
ether a0:36:9f:23:3d:b6 inet 192.168.6.2 netmask 0xffffff00 broadcast
192.168.6.255 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media:
Ethernet autoselect (10Gbase-T <full-duplex>) status: active
cu
Gerrit
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