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

[Arsenault, Benoit]

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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