Hi, This is the command I'm using: mpiexec.exe -machinefile machines.txt -env MPICH2_CHANNEL sock -n 2 cpi.exe I have tried using both machine file and hosts in the command line, but I get the same results. The program runs on a single instance with any number of processors. I tried running mpiexec on one instance and using the other as a single host and that also works. -Nicholas On Fri, Feb 8, 2013 at 12:04 PM, Jayesh Krishna <[email protected]> wrote:
Hi, How are you running your job (mpiexec command)? Did you try using a machine file to specify the hostnames when running the job? Does the program (cpi) execute correctly on a single ec2 instance?
Regards, Jayesh
----- Original Message ----- From: "Nicholas Sgro" <[email protected]> To: "Jayesh Krishna" <[email protected]> Sent: Thursday, February 7, 2013 9:57:55 PM Subject: Re: [mpich-discuss] Amazon ec2 Windows machine
I'm using version 1.4.1p1. I tried the sock channel. It doesn't seem to work either. With sock, I get to the point where I enter the number of intervals, but then it does nothing.
Do you know any reason it wouldn't work with ec2 instances?
On Thu, Feb 7, 2013 at 4:29 PM, Jayesh Krishna < [email protected] > wrote:
Hi, Which version of MPICH2 are you using? Did you try the "sock" channel (See if it works)?
(PS: We haven't tested MPICH2 on Windows with ec2 instances.) Regards, Jayesh
----- Original Message ----- From: "Nicholas Sgro" < [email protected] > To: [email protected] Sent: Thursday, February 7, 2013 11:29:57 AM Subject: [mpich-discuss] Amazon ec2 Windows machine
Hi all,
I am trying to run the example cpi.exe across 2 amazon ec2 instances running windows. I have different problems depending on the channel I choose. If I try nemesis, I get the following error:
Fatal error in MPI_Init: Other MPI error, error stack: MPIR_Init_thread(392).................: MPID_Init(139)........................: channel initialization failed MPIDI_CH3_Init(38)....................: MPID_nem_init(196)....................: MPIDI_CH3I_Seg_commit(366)............: MPIU_SHMW_Hnd_deserialize(324)........: MPIU_SHMW_Seg_open(863)...............: MPIU_SHMW_Seg_create_attach_templ(763): unable to allocate shared memory - OpenFileMapping The system cannot find the file specified.
If I try to use shm, cpi.exe uses 100% of the processors on both machines, but makes no progress and I have to cancel the job.
I am attaching logs from smpd from both machines from the runs with nemesis and shm.
I don't have any experience with mpich, so I have no idea what the problem is. Any guidance would be appreciated.
Thanks
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