[mpich-discuss] ch3:nemesis performance and SMP cluster

[Vamvakopoulos Manolis]

Dear sir
as wrote the previous mail i forgot to refer

that i made my all test with "OSC mpiexec"
( http://www.osc.edu/~djohnson/mpiexec/index.php )

which formal support ch3:sock as communication device over PMI



with MPICH2-1.1.1p1 LIB and mdp as a Proccess manager
the 8x2 tests on smp machine  it is OK over ch3:nemesis and it works fine!

the problem now is that mpiexec 0.83 (from OSC) it is not compatible

with the MPICH2-1.1.1p1 with nemesis communicator !!

best

E.V.






-- 
University OF Ioannina
Department of Computer Science
P.O. BOX 1186 Ioannina, Greece
Tel: (+30)-26510-98864
Fax: (+30)-26510-98890


Quoting Rajeev Thakur <thakur at mcs.anl.gov>:

> Not sure what you are saying here. What behavior are you seeing with
> 1.1.1p1?
>
> Rajeev
>
> > -----Original Message-----
> > From: mpich-discuss-bounces at mcs.anl.gov
> > [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of
> > Vamvakopoulos Manolis
> > Sent: Saturday, September 05, 2009 5:09 PM
> > To: mpich-discuss at mcs.anl.gov
> > Subject: [mpich-discuss] ch3:nemesis performance and SMP cluster
> >
> > Dear Developers and Users
> >
> > In our cluster we have already install  mpich2-1.0.8 as a
> > default production
> > version configure with ch3:ssm device.
> >
> > With the above lib ,an application  with alltoall
> > communication (let's say
> > amber9) "runs" efficiently  on 16 procs with 1 procs per node  (16x1)
> > and 16 procs with two procs per node (8x2) (run's time are comparable)
> >
> > --------------------------------------------------------------
> > ---------------
> > I make run test with same application and  mpich2-1.1.1p1
> > with nemesis device
> > and the same tests was faster (up to 30%) on first case (one
> > proc per node)
> >
> > same behavior i found with  mpich2-1.1.1p and ch3:ssm device
> >
> >
> > In all case with mpich2-1.1.1p the runs on 16 procs on 16
> > different node were
> > faster
> >
> > -----
> > Our cluster consist from DL145 HP with 2 single CPU: opteron
> > 248 2.2 MHZ with
> > 4GB per node with linux 2.6.9-78.0.1.ELsmp SL 4.7 and for the
> > interconnect we
> > use a full crossbar dedicate Gigabit switch (with high
> > backplane 400Gb)
> >
> > can somebody  shed a light to this issue
> >
> > thank you very much in advance
> >
> > E.V.
> >
> > --
> > University OF Ioannina
> > Department of Computer Science
> > P.O. BOX 1186 Ioannina, Greece
> > Tel: (+30)-26510-98864
> > Fax: (+30)-26510-98890
> >
> >
> >
> >
>
>