OBSOLETE Patch-ID# 106082-02
Keywords: large-proc large-task perf SMP bcast pbind
Synopsis: OBSOLETED by 107523
Date: Apr/30/98

Solaris Release: 2.5.1, 2.6

SunOS Release: 5.5.1, 5.6

Unbundled Product: HPC

Unbundled Release: 2.0

Relevant Architectures: sun4u

BugId's fixed with this patch: 4106335 4104172 4098183 4126940 4120847

Changes incorporated in this version: 4104172 4098183 4126940 4120847

Patches accumulated and obsoleted by this patch: 

Patches which conflict with this patch: 

Patches required with this patch: 106066-02 106346-01

Obsoleted by: 107523 on Jun/15/99

Files included with this patch: 

/opt/SUNWhpc/HPC2.0/lib/libfmpi.so.1
/opt/SUNWhpc/HPC2.0/lib/libmpi.so.1
/opt/SUNWhpc/HPC2.0/lib/libmpi_mt.so.1
/opt/SUNWhpc/HPC2.0/lib/libpmpi.so.1
/opt/SUNWhpc/HPC2.0/man/man3/MPI.3

Problem Description: 

4126940 performance within a large SMP can be improved by binding to processors
4120847 MPI broadcast optimizations for single SMP 
4098183 unpacking of partial receives of hvectors is done incorrectly
4104172 truncating error not reported when unpacking a non-contiguous datatype

4106335 RTE file descriptor fix for large tasks benefits from mpi changes

	Though this fix is not required, it does help in reducing the
	file descriptor problem.



Patch Installation Instructions: 
-------------------------------- 
Refer to the Install.info file for instructions on using the
generic 'installpatch' and 'backoutpatch' scripts provided with
each patch.  Any other special or non-generic installation
instructions should be described below as special instructions.

Special Install Instructions: 
----------------------------- 

This patch should not be applied when any MPI, HPF, or S3L
tasks are active on the system (due to the MPI .so changes).
"/opt/SUNWhpc/bin/tmps -Ae" should not report any active tasks.
If you install this patch while tasks are active, it's possible 
that they will die from a SEGV or BUS error.


Processor binding functionality was introduced with the fix 
for 4126940. Users must set MPI_PROCBIND in their shell 
environment from which they execute the tmrun of their HPC 
tasks. The HPC administrator must also set allow_pbind,
through tmadmin, in the partition that will be used for the 
task. Warning: performance gains by setting MPI_PROCBIND have 
been demonstrated on dedicated single SMP partition; performance 
on other systems is less likely to be improved and may 
show degradation.