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Patch 2773 : libmp rollup : [IRIX 6.4 6.3 6.2]
INDEX
RELATIONS
RELEASE NOTES
1. Patch SG0002773 Release Note
This release note describes patch SG0002773 to IRIX 6.2 (and
above).
1.1 Supported Hardware Platforms
This patch contains bug fixes for all platforms running 6.2
(and above). The software cannot be installed on other
configurations.
1.2 Supported Software Platforms
This patch contains bug fixes for the Fortran, C, and C++
compiler development and execution environment (version
1233356910) on a system running IRIX 6.2 (and above). While
installing the patch you may notice a conflict between
patchSG0002773.compiler_dev_sw.lib and
patchSG0002773.compiler_dev_sw32.lib. These conflicts are to
be expected, so rather than overriding the conflicts, do not
install the conflicting subsystem.
1.3 Bugs Fixed by Patch SG0002773
This patch contains fixes for the following bugs. Bug
numbers from Silicon Graphics bug tracking system are
included for reference.
o SGI bug number 232474: The routine
mp_set_slave_stacksize should return old value of
stacksize. With this patch the routine now returns the
previous value of stacksize.
o SGI bug number 378358: The MP library had a bug in -n32
compilation where the return address was improperly
aligned in memory. This caused a problem with stack-
unwind by tools such as dbx and gprof.
o SGI bug number 404228: The MP library now provides
support for data distribution, useful in the context of
distributed shared memory machines such as the Origins.
o SGI bug number 441658: A user-specified signal handler
to trap control-c did not work. This patch fixes this
bug, so that user-defined handlers to catch SIGINT now
work.
o SGI bug number 451258: CC Sync counter can occasionally
encounter a hardware deadlock on IP25. With this patch
the use of the CC-sync counter is disabled by default.
o SGI bug number 455437: Bug in using hardware fetch-
and-op on IP27 through the _DSM_FOP environment
variable (programs run with 1 thread get deadlocked).
With this patch _DSM_FOP now works correctly with
varying number of threads, including 1.
o SGI bug number 455511: On IP27 the environment variable
_DSM_MUSTRUN could sometimes cause multiple threads to
be assigned to the same node, leading to poor
performance. With this patch the MP library requests a
small amount of memory per node, avoiding corner cases
that resulted in the above problem.
o SGI bug number 460617: The symbol pm_filldefault
referenced by the MP library is undefined on systems
before IRIX 6.4. To allow execution on earlier systems
(e.g. IRIX 6.2) this symbol needs to be declared as
weak within the library.
o SGI bug number 468925: On Origin-2000 systems although
page migration is disabled by default, once enabled the
migration level requested was extremely aggressive.
With this patch the migration level (if enabled) is
lower with the value 10 on a scale of 1-100. In
addition, the user can control the migration level
explicitly through the environment variable
_DSM_MIGRATION_LEVEL (which can take values between 1
and 100).
o SGI bug number 474179: This patch cleans up two
environment variables. The first concerns data
placement on Origin-2000 systems: _DSM_PLACEMENT is
now the recommended way to obtain either FIRST_TOUCH
data placement (default) or ROUND_ROBIN placement
(optional). The second environment variable controls
the underlying barrier implementation in the MP
runtime: _DSM_BARRIER can now be set to FOP, enabling
the hardware uncached/fetchop barrier implementation
(disabled by default).
o SGI bug number 520385: This patch fixes a bug in the
handling a zero-trip parallel loop with either dynamic
or gss scheduling. Before this fix, such a parallel
loop could spin indefinitely.
o SGI bug number 538673: This patch fixes a bug in
program termination when the user program has installed
a SIGCLD handler. Before this fix, such a program could
result in error messages of the form "Error doing
waitpid for slave termination".
o SGI bug number 549413: breakup patch 2416 runtime into
smaller patches
o SGI bug number 561897: This patch fixes a race
condition in handling the ONTO clause.
o SGI bug number 562965: This patch fixes a bug in
handling overlapping portions of a distributed array.
o SGI bug number 574971: This patch fixes a bug in
handling affinity for a non-distributed dimension of an
array, and in computing the loop bounds for a block-
distribution.
o SGI bug number 576927: If the program exits due to an
error condition, some threads might be killed while
they are holding a lock. This fix ensures that the
program does not deadlock in that situation.
1.4 Subsystems Included in Patch SG0002773
This patch replaces patches:
1382 1390 1481 1609 1737 1816 1896 and 2422
This patch release includes these subsystems:
o patchSG0002773.compiler_dev_sw.lib
o patchSG0002773.compiler_dev_sw32.lib
o patchSG0002773.compiler_dev_sw64.lib
o patchSG0002773.compiler_eoe_sw.lib
o patchSG0002773.compiler_eoe_sw64.lib
1.5 Installation Instructions
Because you want to install only the patches for problems
you have encountered, patch software is not installed by
default. After reading the descriptions of the bugs fixed
in this patch (see Section 1.3), determine the patches that
meet your specific needs.
If, after reading Sections 1.1 and 1.2 of these release
notes, you are unsure whether your hardware and software
meet the requirements for installing a particular patch, run
inst. The inst program does not allow you to install
patches that are incompatible with your hardware or
software.
Patch software is installed like any other Silicon Graphics
software product. Follow the instructions in your Software
Installation Administrator's Guide to bring up the miniroot
form of the software installation tools.
Follow these steps to select a patch for installation:
1. At the Inst> prompt, type
install patchSGxxxxxxx
where xxxxxxx is the patch number.
2. Initiate the installation sequence. Type
Inst> go
3. You may find that two patches have been marked as
incompatible. (The installation tools reject an
installation request if an incompatibility is
detected.) If this occurs, you must deselect one of
the patches.
Inst> keep patchSGxxxxxxx
where xxxxxxx is the patch number.
4. After completing the installation process, exit the
inst program by typing
Inst> quit
1.6 Patch Removal Instructions
To remove a patch, use the versions remove command as you
would for any other software subsystem. The removal process
reinstates the original version of software unless you have
specifically removed the patch history from your system.
versions remove patchSGxxxxxxx
where xxxxxxx is the patch number.
To keep a patch but increase your disk space, use the
versions removehist command to remove the patch history.
versions removehist patchSGxxxxxxx
where xxxxxxx is the patch number.
1.7 Known Problems INST SUBSYSTEM REQUIREMENTS No Requirements Information Available. INST SUBSYSTEM CHECKSUMS These checksums help to provide a 'signature' for the patch inst image which can be used to authenticate other inst images. You can obtain this kind of output by running sum -r on the image (from the command line): 20769 11 patchSG0002773 46672 902 patchSG0002773.compiler_dev_sw 46672 902 patchSG0002773.compiler_dev_sw32 39963 916 patchSG0002773.compiler_dev_sw64 09088 661 patchSG0002773.compiler_eoe_sw 03061 657 patchSG0002773.compiler_eoe_sw64 20707 6 patchSG0002773.idb INST SUBSYSTEM FILE LISTINGS The following lists the files which get installed from each subsystem in the patch:
DOWNLOAD PATCH
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Document Id: 20021117071154-IRIXPatch-1175
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