[mpich-discuss] Large Message Sizes with Mpich2 V 1.0.8

[Rajeev Thakur]

What maximum message predefined message size in MPICH2 are you refering to?
 
Rajeev


  _____  

From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Arsenault, Benoit
Sent: Monday, March 16, 2009 3:21 PM
To: mpich-discuss at mcs.anl.gov
Subject: [mpich-discuss] Large Message Sizes with Mpich2 V 1.0.8



UNRESTRICTED | ILLIMITÉ 

Mpich2 Users, 

I compiled the 64-bit mpich2 Version 1.0.8 with MCNP5 Version 1.40 on Linux
RedHat.  I can run reasonable size problems without any difficulties, but
the code crashes when I use large models.  The error message that I get is
listed below and relates to a subroutine in MCNP5.

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2069154944)

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2049205848)

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2029256752)

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2029256704)

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2028987040)

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2028987032)

 [pe:0] **DOTCOMM Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!((
dotcommp_sbuf.data != ((void *)0) ))]) (alloc(dotcommp_sbuf.data))
(2028592456).

I browsed the MCNP Users' group and similar problems have been encountered
where users had to re-compile mpich2 with a change to increase the maximum
size of a message.  I couldn't find a way to go beyond the maximum size of a
message pre-defined in mpich2 V 1.0.8.

Would anyone knows if mpich2 V 1.0.8 has the same limitations in terms of
maximum message size, and if this can be resolved?


Thanks for your help. 


Ben 





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