Date: Fri, 23 Jul 2010 01:36:10 -0700 From: Jack Vogel <jfvogel@gmail.com> To: John Hay <jhay@meraka.org.za> Cc: freebsd-net@freebsd.org Subject: Re: packet loss on ixgbe using vlans and routing Message-ID: <AANLkTinnOWY3B6R3hRi-Eo4w0AEBhrgFKd13zOK8jNu9@mail.gmail.com> In-Reply-To: <20100723074047.GA47514@zibbi.meraka.csir.co.za> References: <20100723074047.GA47514@zibbi.meraka.csir.co.za>
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Yes, I am here, I have been reading this, but I am also very busy with a couple of things, please be patient, I will get on this asap. Cheers, Jack On Fri, Jul 23, 2010 at 12:40 AM, John Hay <jhay@meraka.org.za> wrote: > Hi, > > (Jack any chance that you can look at this please?) > > It looks like there are 2 problems with the ixgbe driver on FreeBSD-8. > I have a Dell T710 with 4 X 10G ethernet interfaces (2 X Dual port Intel > 82599 cards). It is running FreeBSD RELENG_8. > > 1 - When routing (using vlans) there is heavy packet loss that go away > when you do "ifconfig ix2 -rxcsum". The packet loss seems to be on the > receive side because I do not see them on the receiving interface with > tcpdump. This seems to impact both ipv4 and ipv6. > > My test setup is the Dell T710 with its ix2 connected to a 10G port of > a Nortel 4526GTX. On that port I have 2 vlans configured with half of > the 1G ports in the one vlan and the other half in the other vlan. > > If I test with iperf from one of the machines on a 1G port to the T710, > I get 920Mbit/s. If I do it simultaneously from a few machines connected > to the 1G ports, all of them basically saturate their 1G links. > > If I now try to route from the one vlan to the other, ie. doing an iperf > from a 1G connected machine, through the T710, to another 1G connected > machine, I see packet loss, sometimes iperf is only able to do 100kbits/s. > (Configuring a tcp relay, like socat, on the T710, and working through it, > I again get 900Mbit/s and more.) > > So it seems that as long as the T710 with the 10G card is the start or > end point of the connection, I get no packet loss, but as soon as it > has to route, something go wrong. > > 2 - I see packet loss (0 - 40%) on IPv6 packets in vlans, when the > machine is not the originator of the packets. This happen even with > the "ifconfig ix2 -rxcsum". > > Let me try to describe a little more. If a neigbouring machine ping6 it, > there will be packet loss. If it act as a router for ipv6, there will be > packet loss. This happen even when the network is pretty idle and with > different switches (Nortel and Cisco equipment). The packet loss is > very fluctuating. Pinging 1000 packets might loose 1% one time and the > next time 30%. Looking with tcpdump, I can see the packets arriving and > going out, but the packet never arrive at the next machine. (My feeling is > that they get lost inside the card.) The error counters on the switch > does not increment. > > I do not see packet loss if the machine originate the packets, for example > ping6 from the machine. Also ipv4 packets do not have any packets loss. If > I do not use vlans, I don't see packet loss with ipv6 either. > > The machine also have bce 1G interfaces and I do not see the packet loss > on them. > > Here is some info about the machine / setup. The numbers are pretty low > because I rebooted after compiling a kernel with IPFIREWALL, ROUTETABLES, > MROUTING and FLOWTABLE removed. I'll add my kernel config file with empty > and commented out lines removed. > > pciconf -lvc > ix0@pci0:129:0:0: class=0x020000 card=0x00038086 chip=0x10fb8086 > rev=0x01 hdr=0x00 > vendor = 'Intel Corporation' > class = network > subclass = ethernet > cap 01[40] = powerspec 3 supports D0 D3 current D0 > cap 05[50] = MSI supports 1 message, 64 bit, vector masks > cap 11[70] = MSI-X supports 64 messages in map 0x20 enabled > cap 10[a0] = PCI-Express 2 endpoint max data 256(512) link x8(x8) > ix1@pci0:129:0:1: class=0x020000 card=0x00038086 chip=0x10fb8086 > rev=0x01 hdr=0x00 > vendor = 'Intel Corporation' > class = network > subclass = ethernet > cap 01[40] = powerspec 3 supports D0 D3 current D0 > cap 05[50] = MSI supports 1 message, 64 bit, vector masks > cap 11[70] = MSI-X supports 64 messages in map 0x20 enabled > cap 10[a0] = PCI-Express 2 endpoint max data 256(512) link x8(x8) > ix2@pci0:131:0:0: class=0x020000 card=0x00038086 chip=0x10fb8086 > rev=0x01 hdr=0x00 > vendor = 'Intel Corporation' > class = network > subclass = ethernet > cap 01[40] = powerspec 3 supports D0 D3 current D0 > cap 05[50] = MSI supports 1 message, 64 bit, vector masks > cap 11[70] = MSI-X supports 64 messages in map 0x20 enabled > cap 10[a0] = PCI-Express 2 endpoint max data 256(512) link x8(x8) > ix3@pci0:131:0:1: class=0x020000 card=0x00038086 chip=0x10fb8086 > rev=0x01 hdr=0x00 > vendor = 'Intel Corporation' > class = network > subclass = ethernet > cap 01[40] = powerspec 3 supports D0 D3 current D0 > cap 05[50] = MSI supports 1 message, 64 bit, vector masks > cap 11[70] = MSI-X supports 64 messages in map 0x20 enabled > cap 10[a0] = PCI-Express 2 endpoint max data 256(512) link x8(x8) > > output of vmstat -i > > interrupt total rate > irq19: ehci0 28371 0 > irq21: uhci2 uhci4+ 48 0 > irq23: atapci0 46 0 > irq34: mpt0 146954 2 > cpu0: timer 112205297 1999 > irq256: bce0 52063 0 > irq257: bce1 1 0 > irq258: bce2 1 0 > irq259: bce3 1 0 > irq260: ix0:que 0 142258 2 > irq261: ix0:que 1 56464 1 > irq262: ix0:que 2 56199 1 > irq263: ix0:que 3 56198 1 > irq264: ix0:que 4 66569 1 > irq265: ix0:que 5 56148 1 > irq266: ix0:que 6 56217 1 > irq267: ix0:que 7 56311 1 > irq268: ix0:que 8 56169 1 > irq269: ix0:que 9 69485 1 > irq270: ix0:que 10 56176 1 > irq271: ix0:que 11 56205 1 > irq272: ix0:que 12 56281 1 > irq273: ix0:que 13 56359 1 > irq274: ix0:que 14 56292 1 > irq275: ix0:que 15 56197 1 > irq276: ix0:link 2 0 > irq277: ix1:que 0 107873 1 > irq278: ix1:que 1 56094 0 > irq279: ix1:que 2 56097 0 > irq280: ix1:que 3 56096 0 > irq281: ix1:que 4 65439 1 > irq282: ix1:que 5 56091 0 > irq283: ix1:que 6 56092 0 > irq284: ix1:que 7 56098 0 > irq285: ix1:que 8 56091 0 > irq286: ix1:que 9 56096 0 > irq287: ix1:que 10 56093 0 > irq288: ix1:que 11 56091 0 > irq289: ix1:que 12 56096 0 > irq290: ix1:que 13 56095 0 > irq291: ix1:que 14 57125 1 > irq292: ix1:que 15 56093 0 > irq293: ix1:link 1 0 > irq294: ix2:que 0 231250 4 > irq295: ix2:que 1 57784 1 > irq296: ix2:que 2 69956 1 > irq297: ix2:que 3 59498 1 > irq298: ix2:que 4 58201 1 > irq299: ix2:que 5 58599 1 > irq300: ix2:que 6 57813 1 > irq301: ix2:que 7 60075 1 > irq302: ix2:que 8 68639 1 > irq303: ix2:que 9 58194 1 > irq304: ix2:que 10 60752 1 > irq305: ix2:que 11 57628 1 > irq306: ix2:que 12 66796 1 > irq307: ix2:que 13 63307 1 > irq308: ix2:que 14 60788 1 > irq309: ix2:que 15 59102 1 > irq310: ix2:link 5 0 > irq311: ix3:que 0 56090 0 > irq312: ix3:que 1 56090 0 > irq313: ix3:que 2 56090 0 > irq314: ix3:que 3 56090 0 > irq315: ix3:que 4 56090 0 > irq316: ix3:que 5 56090 0 > irq317: ix3:que 6 56090 0 > irq318: ix3:que 7 56090 0 > irq319: ix3:que 8 56090 0 > irq320: ix3:que 9 56090 0 > irq321: ix3:que 10 56090 0 > irq322: ix3:que 11 56090 0 > irq323: ix3:que 12 56090 0 > irq324: ix3:que 13 56090 0 > irq325: ix3:que 14 56090 0 > irq326: ix3:que 15 56090 0 > cpu1: timer 112196134 1999 > cpu10: timer 112196179 1999 > cpu3: timer 112196135 1999 > cpu8: timer 112196108 1999 > cpu4: timer 112196161 1999 > cpu11: timer 112196179 1999 > cpu5: timer 112196161 1999 > cpu13: timer 112196179 1999 > cpu6: timer 112196161 1999 > cpu14: timer 112196179 1999 > cpu2: timer 112196106 1999 > cpu12: timer 112196179 1999 > cpu7: timer 112196161 1999 > cpu9: timer 112196155 1999 > cpu15: timer 112196179 1999 > Total 1799390156 32072 > > netstat -m > > 133178/4042/137220 mbufs in use (current/cache/total) > 133112/2062/135174/262144 mbuf clusters in use (current/cache/total/max) > 133112/2056 mbuf+clusters out of packet secondary zone in use > (current/cache) > 0/20/20/131072 4k (page size) jumbo clusters in use > (current/cache/total/max) > 0/0/0/65536 9k jumbo clusters in use (current/cache/total/max) > 0/0/0/32768 16k jumbo clusters in use (current/cache/total/max) > 299518K/5214K/304733K bytes allocated to network (current/cache/total) > 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) > 0/0/0 requests for jumbo clusters denied (4k/9k/16k) > 0/0/0 sfbufs in use (current/peak/max) > 0 requests for sfbufs denied > 0 requests for sfbufs delayed > 0 requests for I/O initiated by sendfile > 0 calls to protocol drain routines > > kernel config file, basically started with 64 bit and removed the stuff > I do not need. > > cpu HAMMER > ident SEEKAT > device ipmi > makeoptions DEBUG=-g # Build kernel with gdb(1) debug > symbols > options SCHED_ULE # ULE scheduler > options PREEMPTION # Enable kernel thread preemption > options INET # InterNETworking > options INET6 # IPv6 communications protocols > options SCTP # Stream Control Transmission > Protocol > options FFS # Berkeley Fast Filesystem > options SOFTUPDATES # Enable FFS soft updates support > options UFS_DIRHASH # Improve performance on big > directories > options CD9660 # ISO 9660 Filesystem > options PROCFS # Process filesystem (requires > PSEUDOFS) > options PSEUDOFS # Pseudo-filesystem framework > options GEOM_PART_GPT # GUID Partition Tables. > options GEOM_LABEL # Provides labelization > options COMPAT_43TTY # BSD 4.3 TTY compat (sgtty) > options COMPAT_IA32 # Compatible with i386 binaries > options COMPAT_FREEBSD4 # Compatible with FreeBSD4 > options COMPAT_FREEBSD5 # Compatible with FreeBSD5 > options COMPAT_FREEBSD6 # Compatible with FreeBSD6 > options COMPAT_FREEBSD7 # Compatible with FreeBSD7 > options KTRACE # ktrace(1) support > options STACK # stack(9) support > options SYSVSHM # SYSV-style shared memory > options SYSVMSG # SYSV-style message queues > options SYSVSEM # SYSV-style semaphores > options P1003_1B_SEMAPHORES # POSIX-style semaphores > options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time > extensions > options PRINTF_BUFR_SIZE=128 # Prevent printf output being > interspersed. > options KBD_INSTALL_CDEV # install a CDEV entry in /dev > options HWPMC_HOOKS # Necessary kernel hooks for > hwpmc(4) > options INCLUDE_CONFIG_FILE # Include this file in kernel > options SMP # Symmetric MultiProcessor Kernel > device cpufreq > device acpi > device pci > device ata > device atapicd # ATAPI CDROM drives > device mpt # LSI-Logic MPT-Fusion > device scbus # SCSI bus (required for SCSI) > device da # Direct Access (disks) > device pass # Passthrough device (direct SCSI access) > device atkbdc # AT keyboard controller > device atkbd # AT keyboard > device psm # PS/2 mouse > device kbdmux # keyboard multiplexer > device vga # VGA video card driver > device splash # Splash screen and screen saver support > device sc > device agp # support several AGP chipsets > device uart # Generic UART driver > device loop # Network loopback > device random # Entropy device > device ether # Ethernet support > device pty # BSD-style compatibility pseudo ttys > device bpf # Berkeley packet filter > device uhci # UHCI PCI->USB interface > device ehci # EHCI PCI->USB interface (USB 2.0) > device usb # USB Bus (required) > device uhid # "Human Interface Devices" > device ukbd # Keyboard > device umass # Disks/Mass storage - Requires scbus and > da > device ums # Mouse > > kldstat > Id Refs Address Size Name > 1 55 0xffffffff80100000 6ea290 kernel > 2 1 0xffffffff807eb000 19e088 zfs.ko > 3 2 0xffffffff8098a000 3860 opensolaris.ko > 4 2 0xffffffff8098e000 20448 krpc.ko > 5 1 0xffffffff809af000 21100 geom_mirror.ko > 6 1 0xffffffff809d1000 66c0 if_vlan.ko > 7 1 0xffffffff809d8000 506c8 if_bce.ko > 8 2 0xffffffff80a29000 3ec20 miibus.ko > 9 1 0xffffffff80a68000 243e0 if_ixgbe.ko > 10 1 0xffffffff80a8d000 1e08 coretemp.ko > > ifconfig ix2 (with -rxcsum and global addrs modified) > ix2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=5b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,LRO> > ether 00:1b:21:57:ef:7c > inet6 fe80::21b:21ff:fe57:ef7c%ix2 prefixlen 64 scopeid 0x3 > nd6 options=3<PERFORMNUD,ACCEPT_RTADV> > media: Ethernet autoselect (10Gbase-SR <full-duplex>) > status: active > ifconfig ix2.1 > ix2.1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > ether 00:1b:21:57:ef:7c > inet 10.0.28.2 netmask 0xffffff00 broadcast 10.0.28.255 > inet6 fe80::21b:21ff:fe57:b420%ix2.1 prefixlen 64 scopeid 0x9 > inet6 2001:0:0:3:21b:21ff:fe57:b420 prefixlen 64 > inet6 2001:0:0:3:: prefixlen 64 anycast > nd6 options=3<PERFORMNUD,ACCEPT_RTADV> > media: Ethernet autoselect (10Gbase-SR <full-duplex>) > status: active > vlan: 1 parent interface: ix2 > ifconfig ix2.8 > ix2.8: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > ether 00:1b:21:57:ef:7c > inet 10.0.8.50 netmask 0xffffff00 broadcast 10.0.8.255 > inet6 fe80::21b:21ff:fe57:b420%ix2.8 prefixlen 64 scopeid 0xa > inet6 2001:0:0:1:21b:21ff:fe57:b420 prefixlen 64 > inet6 2001:0:0:1:: prefixlen 64 anycast > nd6 options=3<PERFORMNUD,ACCEPT_RTADV> > media: Ethernet autoselect (10Gbase-SR <full-duplex>) > status: active > vlan: 8 parent interface: ix2 > > John > -- > John Hay -- jhay@meraka.csir.co.za / jhay@FreeBSD.org >
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