[mpich-discuss] Client - server programs on Windows
Darius Buntinas
buntinas at mcs.anl.gov
Tue Aug 23 12:35:27 CDT 2011
Have you tried starting each one with a separate mpiexec? Unless there are some constraints on doing this on Windows, it should work if you give the port name correctly to the client.
-d
On Aug 23, 2011, at 11:06 AM, Thierry Roudier wrote:
> Actually it's one of my constraints: I cannot run the programs in the same command line.
>
> Thierry
>
> On 23/08/2011 5:52 PM, Darius Buntinas wrote:
>> If you want to run two different binaries in the same application you can separate them by a colon (:). E.g.,
>>
>> mpiexec -n 4 prog1 : -n 2 prog2
>>
>> This will start 4 processes with the prog1 executable and 2 processes with the prog2 executable.
>>
>> Is this what you're trying to do?
>>
>> -d
>>
>>
>> On Aug 23, 2011, at 10:31 AM, Thierry Roudier wrote:
>>
>>> Thanks Darius for your answer. Unfortunately, by running mpiexec I didn't find a way to set a unique KVS and domain name. Then the programs run in 2 different scopes. And it seems that is the reason why they cannot communicate together.
>>> Regards,
>>>
>>> Thierry
>>>
>>> On 23/08/2011 4:50 PM, Darius Buntinas wrote:
>>>> A pmi server is needed to exchange connection information (ip address and port) between the processes. Mpiexec provides this. Sorry, there's really no way I can see to do this statically.
>>>>
>>>> -d
>>>>
>>>> On Aug 23, 2011, at 2:40 AM, Thierry Roudier wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Did someone already try this kind of config?
>>>>> Thank you very much!
>>>>>
>>>>> Best regards,
>>>>>
>>>>> Thierry
>>>>>
>>>>> On 17/08/2011 9:14 PM, Thierry Roudier wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I try to connect 2 programs together using MPICH2 v1.4 between 2 Windows 7 64-bit computers.
>>>>>> I tested various configurations without success. Below is the last config I tried:
>>>>>>
>>>>>> - Windows 1: Server
>>>>>> From a command prompt I set the following variables, and ran the server:
>>>>>> set PMI_ROOT_HOST=windows_1
>>>>>> set PMI_KVS=mpich2
>>>>>> set PMI_ROOT_LOCAL=1
>>>>>> set PMI_ROOT_PORT=9222
>>>>>> set PMI_SIZE=2
>>>>>> set PMI_RANK=0
>>>>>> Here is the C code for the server:
>>>>>> #include<stdio.h>
>>>>>> #include<mpi.h>
>>>>>> int main(int nArgc, char ** sArgv)
>>>>>> {
>>>>>> int nMyRank = 0;
>>>>>> MPI_Comm mInterComm;
>>>>>> int nRet;
>>>>>>
>>>>>> char sPortName[MPI_MAX_PORT_NAME];
>>>>>>
>>>>>> nRet = MPI_Init(&nArgc,&sArgv);
>>>>>> printf("Init - nRet: %d\n", nRet);
>>>>>> fflush(stdout);
>>>>>> nRet = MPI_Comm_rank(MPI_COMM_WORLD,&nMyRank);
>>>>>> printf("Comm_rank - nRet: %d - MyRank: %d\n", nRet, nMyRank);
>>>>>> fflush(stdout);
>>>>>>
>>>>>> nRet = MPI_Open_port(MPI_INFO_NULL, sPortName);
>>>>>> printf("Open_port - nRet: %d - Port name: -%s-\n", nRet, sPortName);
>>>>>> fflush(stdout);
>>>>>>
>>>>>> nRet = MPI_Comm_accept(sPortName, MPI_INFO_NULL, 0, MPI_COMM_WORLD,&mInterComm);
>>>>>> printf("Comm_accept - nRet: %d\n", nRet);
>>>>>> fflush(stdout);
>>>>>>
>>>>>> MPI_Comm_disconnect(&mInterComm);
>>>>>> MPI_Finalize();
>>>>>>
>>>>>> return 0;
>>>>>> }
>>>>>>
>>>>>>
>>>>>> - Windows 2: Client (on a command prompt on the second computer)
>>>>>> set PMI_ROOT_HOST=windows_1
>>>>>> set PMI_KVS=mpich2
>>>>>> set PMI_ROOT_LOCAL=0
>>>>>> set PMI_ROOT_PORT=9222
>>>>>> set PMI_SIZE=2
>>>>>> set PMI_RANK=1
>>>>>> Here is the C code for the client:
>>>>>> #include<stdio.h>
>>>>>> #include<mpi.h>
>>>>>> int main(int nArgc, char ** sArgv)
>>>>>> {
>>>>>> int nMyRank;
>>>>>> MPI_Comm mInterComm;
>>>>>> int nRet;
>>>>>>
>>>>>> char sPortName[MPI_MAX_PORT_NAME];
>>>>>> char sPortNumber[MPI_MAX_PORT_NAME];
>>>>>>
>>>>>> nRet = MPI_Init(&nArgc,&sArgv);
>>>>>> printf("Init - nRet: %d\n", nRet);
>>>>>> fflush(stdout);
>>>>>> nRet = MPI_Comm_rank(MPI_COMM_WORLD,&nMyRank);
>>>>>> printf("Comm_rank - nRet: %d - MyRank: %d\n", nRet, nMyRank);
>>>>>> fflush(stdout);
>>>>>>
>>>>>> printf("Enter the port number: ");
>>>>>> fflush(stdout);
>>>>>> gets(sPortNumber);
>>>>>> sprintf(sPortName, "tag=0 description=windows_1 port=%s ifname=192.168.1.101 ", sPortNumber);
>>>>>>
>>>>>> printf("Connecting to: -%s-\n", sPortName);
>>>>>> fflush(stdout);
>>>>>> nRet = MPI_Comm_connect(sPortName, MPI_INFO_NULL, 0, MPI_COMM_WORLD,&mInterComm);
>>>>>> printf("Comm_connect - nRet: %d\n", nRet);
>>>>>> fflush(stdout);
>>>>>>
>>>>>> MPI_Comm_disconnect(&mInterComm);
>>>>>> MPI_Finalize();
>>>>>>
>>>>>> return 0;
>>>>>> }
>>>>>>
>>>>>> I don't use mpiexec. I directly start the programs on each computer from the command prompts. And the smpd services are stopped.
>>>>>> Note: I also checked without fixing the variables above, and with a mpiexec command (smpd(s) running). It doesn't work. Same problem as described below.
>>>>>>
>>>>>> The issue I encountered is the following: The server initializes, wait in the MPI_Init function until the client starts. Once the client initialized, both programs get their respective rank 0 (server) and 1 (client). The server opens the port and displays the info. I enter the port number in the client program. And both waits. The connection is never established. The server waits in MPI_Comm_accept and the client waits in MPI_Comm_connect.
>>>>>>
>>>>>> Note: I didn't set a domain name on my machines. I only set a unique workgroup name.
>>>>>>
>>>>>> Any help would be really appreciated.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Thierry
>>>>>>
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