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From: Alex Tumanov (atumanov_at_[hidden])
Date: 2007-02-01 22:29:02


On 2/1/07, Galen Shipman <gshipman_at_[hidden]> wrote:
> What does ifconfig report on both nodes?

Hi Galen,

On headnode:
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:11:43:EF:5D:6C
          inet addr:10.1.1.11 Bcast:10.1.1.255 Mask:255.255.255.0
          inet6 addr: fe80::211:43ff:feef:5d6c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:279965 errors:0 dropped:0 overruns:0 frame:0
          TX packets:785652 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:28422663 (27.1 MiB) TX bytes:999981228 (953.6 MiB)
          Base address:0xecc0 Memory:dfae0000-dfb00000

eth1 Link encap:Ethernet HWaddr 00:11:43:EF:5D:6D
          inet addr:<public IP> Bcast:172.25.238.255 Mask:255.255.255.0
          inet6 addr: fe80::211:43ff:feef:5d6d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:1763252 errors:0 dropped:0 overruns:0 frame:0
          TX packets:133260 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1726135418 (1.6 GiB) TX bytes:40990369 (39.0 MiB)
          Base address:0xdcc0 Memory:df8e0000-df900000

ib0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:20.1.0.11 Bcast:20.1.0.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:2044 Metric:1
          RX packets:9746 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9746 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:128
          RX bytes:576988 (563.4 KiB) TX bytes:462432 (451.5 KiB)

ib1 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:30.5.0.11 Bcast:30.5.0.255 Mask:255.255.255.0
          UP BROADCAST MULTICAST MTU:2044 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:128
          RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

on COMPUTE node:

# ifconfig
eth0 Link encap:Ethernet HWaddr 00:11:43:D1:C0:80
          inet addr:10.1.1.254 Bcast:10.1.1.255 Mask:255.255.255.0
          inet6 addr: fe80::211:43ff:fed1:c080/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:145725 errors:0 dropped:0 overruns:0 frame:0
          TX packets:85136 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:46506800 (44.3 MiB) TX bytes:14722190 (14.0 MiB)
          Base address:0xbcc0 Memory:df7e0000-df800000

ib0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:20.1.0.254 Bcast:20.1.0.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:2044 Metric:1
          RX packets:9773 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9773 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:128
          RX bytes:424624 (414.6 KiB) TX bytes:617676 (603.1 KiB)

ib1 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:30.5.0.254 Bcast:30.5.0.255 Mask:255.255.255.0
          UP BROADCAST MULTICAST MTU:2044 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:128
          RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

Additionally, I've discovered that this problem is specific to either
Dell hardware or Gig-E, because I cannot reproduce it in my VMware
cluster. Output of lspci for ethernet devices:
[headnode]# lspci |grep -i "ether"; ssh -x compute-0-0 'lspci |grep -i ether'
06:07.0 Ethernet controller: Intel Corporation 82541GI/PI Gigabit
Ethernet Controller (rev 05)
07:08.0 Ethernet controller: Intel Corporation 82541GI/PI Gigabit
Ethernet Controller (rev 05)
07:07.0 Ethernet controller: Intel Corporation 82541GI/PI Gigabit
Ethernet Controller (rev 05)

i.e. headnode has 2 gig-e interfaces and compute - one, and all are the same.

Thanks,
Alex.

On 2/1/07, Galen Shipman <gshipman_at_[hidden]> wrote:
> What does ifconfig report on both nodes?
>
> - Galen
>
> On Feb 1, 2007, at 2:50 PM, Alex Tumanov wrote:
>
> > Hi,
> >
> > I have kept doing my own investigation and recompiled OpenMPI to have
> > only the barebones functionality with no support for any interconnects
> > other than ethernet:
> > # rpmbuild --rebuild --define="configure_options
> > --prefix=/opt/openmpi/1.1.4" --define="install_in_opt 1"
> > --define="mflags all" openmpi-1.1.4-1.src.rpm
> >
> > The error detailed in my previous message persisted, which eliminates
> > the possibility of interconnect support interfering with ethernet
> > support. Here's an excerpt from ompi_info:
> > # ompi_info
> > Open MPI: 1.1.4
> > Open MPI SVN revision: r13362
> > Open RTE: 1.1.4
> > Open RTE SVN revision: r13362
> > OPAL: 1.1.4
> > OPAL SVN revision: r13362
> > Prefix: /opt/openmpi/1.1.4
> > Configured architecture: x86_64-redhat-linux-gnu
> > . . .
> > Thread support: posix (mpi: no, progress: no)
> > Internal debug support: no
> > MPI parameter check: runtime
> > . . .
> > MCA btl: self (MCA v1.0, API v1.0, Component v1.1.4)
> > MCA btl: sm (MCA v1.0, API v1.0, Component v1.1.4)
> > MCA btl: tcp (MCA v1.0, API v1.0, Component v1.0)
> >
> > Again, to replicate the error, I ran
> > # mpirun -hostfile ~/testdir/hosts --mca btl tcp,self ~/testdir/hello
> > In this case, you can even omit the runtime mca param specifications:
> > # mpirun -hostfile ~/testdir/hosts ~/testdir/hello
> >
> > Thanks for reading this. I hope I've provided enough information.
> >
> > Sincerely,
> > Alex.
> >
> > On 2/1/07, Alex Tumanov <atumanov_at_[hidden]> wrote:
> >> Hello,
> >>
> >> I have tried a very basic test on a 2 node "cluster" consisting of 2
> >> dell boxes. One of them is dual CPU Intel(R) Xeon(TM) CPU 2.80GHz
> >> with
> >> 1GB of RAM and the slave node is quad-CPU Intel(R) Xeon(TM) CPU
> >> 3.40GHz with 2GB of RAM. Both have Infiniband cards and Gig-E. The
> >> slave node is connected directly to the headnode.
> >>
> >> OpenMPI version 1.1.4 was compiled with support for the following
> >> btl's: openib,mx,gm, and mvapi. I got it to work over openib, but,
> >> ironically, the same trivial hello world job fails over tcp (please
> >> see the log below). I found that the same problem was already
> >> discussed on this list here:
> >> http://www.open-mpi.org/community/lists/users/2006/06/1347.php
> >> The discussion mentioned that there could be something wrong with the
> >> TCP setup of the nodes. Unfortunately it was taken offline. Could
> >> someone help me with this?
> >>
> >> Thanks,
> >> Alex.
> >>
> >> # mpirun -hostfile ~/testdir/hosts --mca btl tcp,self ~/testdir/hello
> >> Hello from Alex' MPI test program
> >> Process 0 on headnode out of 2
> >> Hello from Alex' MPI test program
> >> Process 1 on compute-0-0.local out of 2
> >> Signal:11 info.si_errno:0(Success) si_code:1(SEGV_MAPERR)
> >> Failing at addr:0xdebdf8
> >> [0] func:/opt/openmpi/1.1.4/lib/libopal.so.0 [0x2a9587e0e5]
> >> [1] func:/lib64/tls/libpthread.so.0 [0x3d1a00c430]
> >> [2] func:/opt/openmpi/1.1.4/lib/libopal.so.0 [0x2a95880729]
> >> [3] func:/opt/openmpi/1.1.4/lib/libopal.so.0(_int_free+0x24a)
> >> [0x2a95880d7a]
> >> [4] func:/opt/openmpi/1.1.4/lib/libopal.so.0(free+0xbf)
> >> [0x2a9588303f]
> >> [5] func:/opt/openmpi/1.1.4/lib/libmpi.so.0 [0x2a955949ca]
> >> [6] func:/opt/openmpi/1.1.4/lib/openmpi/mca_btl_tcp.so
> >> (mca_btl_tcp_component_close+0x34f)
> >> [0x2a988ee8ef]
> >> [7] func:/opt/openmpi/1.1.4/lib/libopal.so.0
> >> (mca_base_components_close+0xde)
> >> [0x2a95872e1e]
> >> [8] func:/opt/openmpi/1.1.4/lib/libmpi.so.0(mca_btl_base_close+0xe9)
> >> [0x2a955e5159]
> >> [9] func:/opt/openmpi/1.1.4/lib/libmpi.so.0(mca_bml_base_close+0x9)
> >> [0x2a955e5029]
> >> [10] func:/opt/openmpi/1.1.4/lib/openmpi/mca_pml_ob1.so
> >> (mca_pml_ob1_component_close+0x25)
> >> [0x2a97f4dc55]
> >> [11] func:/opt/openmpi/1.1.4/lib/libopal.so.0
> >> (mca_base_components_close+0xde)
> >> [0x2a95872e1e]
> >> [12] func:/opt/openmpi/1.1.4/lib/libmpi.so.0(mca_pml_base_close+0x69)
> >> [0x2a955ea3e9]
> >> [13] func:/opt/openmpi/1.1.4/lib/libmpi.so.0(ompi_mpi_finalize+0xfe)
> >> [0x2a955ab57e]
> >> [14] func:/root/testdir/hello(main+0x7b) [0x4009d3]
> >> [15] func:/lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x3d1951c3fb]
> >> [16] func:/root/testdir/hello [0x4008ca]
> >> *** End of error message ***
> >> mpirun noticed that job rank 0 with PID 15573 on node "dr11.local"
> >> exited on signal 11.
> >> 2 additional processes aborted (not shown)
> >>
> > _______________________________________________
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> > users_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>
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