Discussion of the Myrinet interconnect and GM

Phil Cummins | 8 Nov 2000 02:14

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GM 1.2.3 and nfs V3 on Linux


Hello,

   I am upgrading my Linux myrinet network to GM 1.2.3, and also
I have upgraded the kernel to 2.2.17. I saw in the GM documentation
that if I want NFS to perform well I should use NFS version 3.
This doesn't seen to be supported in the 2.2.17 kernel yet, so
I thought I'd go to 2.2.16, where it is. However, there it says
that this version of NFS is "UDP only". In the GM.todo file,
it says "Add UDP service". So, should I infer that there is no
point trying to use Linux's NFS version 3?

--

-- 
---------------------------------------------------------------------
Phil R Cummins                                 cummins <at> jamstec.go.jp
Frontier Research for Subduction Dynamics  tel(i/d):81/0-468-67-3393
JAMSTEC, 2-15 Natsushima-cho               fax(i/d):81/0-468-67-3409
Yokosuka 237-0061, Japan              http://w3.jamstec.go.jp:5090/

Rob Latham | 8 Nov 2000 03:02

Re: [myrinet] GM 1.2.3 and nfs V3 on Linux

On Wed, Nov 08, 2000 at 10:14:08AM +0900, Phil Cummins wrote:
> 
> Hello,
> 
>    I am upgrading my Linux myrinet network to GM 1.2.3, and also
> I have upgraded the kernel to 2.2.17. I saw in the GM documentation
> that if I want NFS to perform well I should use NFS version 3.
> This doesn't seen to be supported in the 2.2.17 kernel yet, so
> I thought I'd go to 2.2.16, where it is.

Huh?  the v3 patches (at least the good -- as in useful -- ones) have
only in late 2.2.18preXX been accepted into the main kernel source.

Either apply trond and dhiggen's patches (from nfs.sourceforge.net) or
wait for the 2.2.18 kernel.

==rob

--

-- 
[                    Rob Latham <rlatham <at> plogic.com>                  ]
[      Paralogic Inc. - www.plogic.com - www.xtreme-machines.com      ]

Phil Cummins | 8 Nov 2000 04:12

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Re: GM 1.2.3 and nfs V3 on Linux


Hi again,

 OK, OK, I had been looking at an out-of-date web site
and have now got the files for 2.2.17. However, the README
still says the server side is UDP only, and GM.todo indicates
UDP is yet to be supported. Well, I guess I will just apply
the kernel patches and hope for the best...

--

-- 
---------------------------------------------------------------------
Phil R Cummins                                 cummins <at> jamstec.go.jp
Frontier Research for Subduction Dynamics  tel(i/d):81/0-468-67-3393
JAMSTEC, 2-15 Natsushima-cho               fax(i/d):81/0-468-67-3409
Yokosuka 237-0061, Japan              http://w3.jamstec.go.jp:5090/

Alice Bonhomme | 8 Nov 2000 15:35

Picon

Picon

Problems with GM


	Hi,

	I've got the following error message when running GM under PCs
(with NT)  with version GM-1.2

gm_user:include\gm_internal.h:338:__gm_send_queue_slot: sqst ctxt =
00000000
gm_user:include\gm_internal.h:339:__gm_send_queue_slot: sqst  pad =
00000001
gm_user:include\gm_internal.h:337:__gm_send_queue_slot: sqst next =
00BB5410

	I don't have any idea what it can be about: problem with routs,
tokens, ports? 

	Alice.

Bob Felderman | 10 Nov 2000 06:47

Re: [myrinet] Re: GM 1.2.3 and nfs V3 on Linux

The README.todo file has now been deleted 
from the main-branch GM development tree to avoid further confusion.
Taht was a lits of things todo, that hade been completed, the
line at the bottom of the file was 
the indicator (to us) of of things that had been done.

On Wed, 8 Nov 2000, Phil Cummins wrote:

> 
> Hi again,
> 
>  OK, OK, I had been looking at an out-of-date web site
> and have now got the files for 2.2.17. However, the README
> still says the server side is UDP only, and GM.todo indicates
> UDP is yet to be supported. Well, I guess I will just apply
> the kernel patches and hope for the best...
> 
> -- 
> ---------------------------------------------------------------------
> Phil R Cummins                                 cummins <at> jamstec.go.jp
> Frontier Research for Subduction Dynamics  tel(i/d):81/0-468-67-3393
> JAMSTEC, 2-15 Natsushima-cho               fax(i/d):81/0-468-67-3409
> Yokosuka 237-0061, Japan              http://w3.jamstec.go.jp:5090/
> 
>

nashif | 15 Nov 2000 17:36

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gm mpich and glibc 2.2


Now that glibc 2.2 is officially released, are there any experiences with
that? mpich does not compile under 2.2.

Anas
--

-- 
Anas Nashif <nashif at suse.de>
SuSE GmbH, Nuremberg, Germany

Wenchao Yang | 16 Nov 2000 02:44

fork in GM?

Is it possible to call fork() in a GM program safely 
(possibly under certain condition)? It seems the GM
replaced the system()/fork() with some empty routine 
at link time that simply prints out a warning message.

Thanks.

--wenchao--

Bob Felderman | 16 Nov 2000 08:32

Re: [myrinet] fork in GM?

You can call fork or system BEFORE you call gm_open, but not after.
In the release after gm-1.4, we'll support fork/system after 
gm_open for linux.

Under linux you can call 
gm_fork
which will test to see if you have any ports open, then
will call __fork for you.

Bob

Oleg I. Vdovikin | 17 Nov 2000 13:48

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alphalinux GM 1.2.3 problems

    We are testing alphalinux cluster with 4 SMP nodes (2x21264A 666 MHz on
Samsung UP-2000, LANai 7 boards, RedHat 6.1 with 2.2.16 SMP kernel). Now I'm
trying to move from GM 1.1.1 to GM 1.2.3. I've compiled GM 1.2.3,
MPICH-1.2..3 from the sources and install them. Now, I'm observing the
following. During host to host transfers evrything works fine, but during
internal host transfers (via shmem I think) processing stops. BTW these SMP
transfers works and we got good results.
    Periodicaly during testing we receive the following message in the
kernel log "unaligned trap at xxxxxxxxxxxxx" and the "[4] Internal error:
msg packet discarded (smppriv.c:626)" or "[0] Internal error: msg packet
discarded (smppriv.c:626)" in the console.
    Our testing configuration file follows:
8
M15E    3
M16E    3
M17E    3
M18E    3
M15E    4
M16E    4
M17E    4
M18E    4

    What is wrong?
    Thanks.

Best regards, Oleg.

P.S. GM 1.1.1 & ParaStation 2 works fine.

(Continue reading)

Wu Shouyuan | 22 Nov 2000 02:57

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Synronization?

Dear Member,

Do any one know how to manage the event/step syncronization in parallel
computer system which use Myrinet?
I am now engaged in a research project on real-time digital simulation
of power network. But I am confused with the problem about how to
syncronize the steps,
ie, in the simulation, the process must keep step with the real time in
steps.
And also there may be AD or DA (Analog to Digital or Digital to Analog)
interface with PCI bus, the AD/DA converter should be sycronised with
the time steps. The time step may be, for example, 100 micoseconds.

Any suggestion or comment is appreciated.

Wu Shouyuan,   Ph. D.
Electric Power Research Institute, CHINA,
Beijing, 100085
Email:wooshy <at> epri.ac.cn

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gmane.network.myrinet.general.

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