Interactions with mxge, pf, nfsd, and the kernel

Wed Jul 2 16:59:17 UTC 2014

Hi,

I vaguely recall some pf issues that caused the state table to not get
flushed and things to get stuck. I think it fixed post 10.0-REL.

Maybe update to 10-STABLE and see?

-a

On 2 July 2014 08:11, Bob Healey <healer at rpi.edu> wrote:
> Hello.
>
> I've been wrestling with this on and off for a few months now.  I have an
> assortment of systems (some Dell Poweredge R515, R610, and IBM x3630M3) with
> 10 gig Myricom ethernet cards acting as nfs servers to Linux HPC compute
> clusters (12-36 nodes, 384 - 480 cores) connected via gigabit ethernet.
> They are also connected to the outside world via onboard bce (Dell) or igb
> (IBM).  After a variable length of time, I will lose all network access to a
> host. Connecting via console, the machine tends to be fully responsive.  A
> reboot clears the problem, but I have yet to figure out any
> sysctls/loader.conf tunables to clear the problem and make it stay away.  PF
> is in use to restrict access to the host to a pair of public /24's, and to
> 10/8.  If there is a way in zfs's sharenfs property to make that
> restriction, I'd be happy to change, but I really don't like leaving nfs
> open to the university's quartet of /16's, so PF it is.  The vlan2 interface
> has mxge0 as its parent.
>
> Thanks for any help.
>
> This host is getting ready to crash soon, based on netstat.
> root at husker:~ # netstat -i
> Name    Mtu Network       Address              Ipkts Ierrs Idrop Opkts Oerrs
> Coll
> mxge0  9000 <Link#1>      00:60:dd:44:d2:0a  6358280   262 0  4061637     0
> 0
> mxge0  9000 fe80::260:ddf fe80::260:ddff:fe        0     - -        2     -
> -
> bce0   1500 <Link#2>      08:9e:01:50:a1:ac   276391     0 0        0     0
> 0
> bce0   1500 fe80::a9e:1ff fe80::a9e:1ff:fe5        0     - -        3     -
> -
> bce1   1500 <Link#3>      08:9e:01:50:a1:ad 2229709391 16921     0
> 1182942116     0     0
> bce1   1500 128.113.12.0  husker            2226254093     -     -
> 1183962005     -     -
> bce1   1500 fe80::a9e:1ff fe80::a9e:1ff:fe5        0     - -        3     -
> -
> lo0   16384 <Link#4>                            2030     0 0     2030     0
> 0
> lo0   16384 localhost     ::1                      4     - -        4     -
> -
> lo0   16384 fe80::1%lo0   fe80::1                  0     - -        0     -
> -
> lo0   16384 your-net      localhost             2026     -     - 2026     -
> -
> vlan2  9000 <Link#5>      00:60:dd:44:d2:0a  4387250     0 0  3060586     0
> 0
> vlan2  9000 10.2.3.0      husker.galactica.  4370309     -     - 3963931
> -     -
> vlan2  9000 fe80::260:ddf fe80::260:ddff:fe        0     - -        2     -
> -
> vlan2  9000 <Link#6>      00:60:dd:44:d2:0a  1971034     0 0  1001061     0
> 0
> vlan2  9000 10.2.4.0      husker.enterprise  1700742     -     - 1961891
> -     -
> vlan2  9000 fe80::260:ddf fe80::260:ddff:fe        0     - -        4     -
> -
> root at husker:~ # netstat -im
> 6157/3233/9390 mbufs in use (current/cache/total)
> 4081/1883/5964/1018800 mbuf clusters in use (current/cache/total/max)
> 4080/795 mbuf+clusters out of packet secondary zone in use (current/cache)
> 0/5/5/509399 4k (page size) jumbo clusters in use (current/cache/total/max)
> 512/23/535/150933 9k jumbo clusters in use (current/cache/total/max)
> 0/0/0/84899 16k jumbo clusters in use (current/cache/total/max)
> 14309K/4801K/19110K bytes allocated to network (current/cache/total)
> 10/1883/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
> 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters)
> 0/0/0 requests for jumbo clusters delayed (4k/9k/16k)
> 2/1736/0 requests for jumbo clusters denied (4k/9k/16k)
> 0 requests for sfbufs denied
> 0 requests for sfbufs delayed
> 0 requests for I/O initiated by sendfile
> root at husker:~ # uptime
> 11:07AM  up 23 days, 19:27, 1 user, load averages: 0.14, 0.17, 0.13
> root at husker:~ # sysctl -a | grep nmb
> kern.ipc.nmbclusters: 1018800
> kern.ipc.nmbjumbop: 509399
> kern.ipc.nmbjumbo9: 452799
> kern.ipc.nmbjumbo16: 339596
> kern.ipc.nmbufs: 6520320
> root at husker:~ # cat /boot/loader.conf
> zfs_load="YES"
> amdtemp_load="YES"
> if_mxge_load="YES"
> mxge_ethp_z8e_load="YES"
> mxge_eth_z8e_load="YES"
> mxge_rss_ethp_z8e_load="YES"
> mxge_rss_eth_z8e_load="YES"
> vfs.zfs.arc_max="12288M"
> root at husker:~ # cat /var/run/dmesg.boot | head -16
> Copyright (c) 1992-2014 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
>         The Regents of the University of California. All rights reserved.
> FreeBSD is a registered trademark of The FreeBSD Foundation.
> FreeBSD 10.0-RELEASE-p4 #0: Tue Jun  3 13:14:57 UTC 2014
>     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
> FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
> CPU: AMD Opteron(tm) Processor 4122 (2200.07-MHz K8-class CPU)
>   Origin = "AuthenticAMD"  Id = 0x100f80  Family = 0x10  Model = 0x8
> Stepping = 0
> Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
>   Features2=0x802009<SSE3,MON,CX16,POPCNT>
>   AMD
> Features=0xee500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM,3DNow!+,3DNow!>
>   AMD
> Features2=0x837ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,SKINIT,WDT,NodeId>
>   TSC: P-state invariant
> real memory  = 17179869184 (16384 MB)
> avail memory = 16588054528 (15819 MB)
>
>
> --
> Bob Healey
> Systems Administrator
> Biocomputation and Bioinformatics Constellation
> and Molecularium
> healer at rpi.edu
> (518) 276-4407
>
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