OpenVMS] VMS721_PTHREAD-V0300 (Alpha V7.2-1) PTHREAD ECO Summary
TITLE: OpenVMS] VMS721_PTHREAD-V0300 (Alpha V7.2-1) PTHREAD ECO Summary
New Kit Date : 12-MAR-2001
Modification Date: 04-APR-2001
Modification Type: Updating links for ftp site. No changes made to kit.
NOTE: An OpenVMS saveset or PCSI installation file is stored
on the Internet in a self-expanding compressed file.
For OpenVMS savesets, the name of the compressed saveset
file will be kit_name.a-dcx_vaxexe for OpenVMS VAX or
kit_name.a-dcx_axpexe for OpenVMS Alpha. Once the OpenVMS
saveset is copied to your system, expand the compressed
saveset by typing RUN kitname.dcx_vaxexe or kitname.dcx_alpexe.
For PCSI files, once the PCSI file is copied to your system,
rename the PCSI file to kitname-dcx_axpexe.pcsi, then it can
be expanded by typing RUN kitname-dcx_axpexe.pcsi. The resultant
file will be the PCSI installation file which can be used to install
the ECO.
Copyright (c) Compaq Computer Corporation 2001. All rights reserved.
PRODUCT: OpenVMS Alpha
COMPONENT: PTHREADs
SOURCE: Compaq Computer Corporation
ECO INFORMATION:
ECO Kit Name: VMS721_PTHREAD-V0300
DEC-AXPVMS-VMS721_PTHREAD-V0300--4.PCSI
ECO Kits Superseded by This ECO Kit: VMS721_PTHREAD-V0200
ECO Kit Approximate Size: 1344 Blocks
Kit Applies To: OpenVMS Alpha V7.2-1
System/Cluster Reboot Necessary: No
Rolling Re-boot Supported: N/A
Installation Rating: INSTALL_3
3 - To be installed on all systems running
the listed versions of OpenVMS which
are experiencing the problems described.
Kit Dependencies:
The following remedial kit(s) must be installed BEFORE
installation of this kit:
VMS721_UPDATE-V0100
VMS721_PCSI-V0100
In order to receive all the corrections listed in this
kit, the following remedial kits should also be installed:
None
ECO KIT SUMMARY:
An ECO kit exists for PTHREADS on OpenVMS Alpha V7.2-1. This kit addresses
the following problems:
PROBLEMS ADDRESSED IN VMS721_PTHREAD-V0300 KIT:
o Applications that disable ASTs (asynchronous system traps) may
hang.
Images Affected: [SYSLIB]PTHREAD$DBGSHR.EXE
[SYSLIB]PTHREAD$RTL.EXE
Problems Addressed in VMS721_PTHREAD-V0200:
o When a kernel thread is not needed, it will go idle within a
null thread. There are circumstances in which the thread
cannot be revived. As a result, the user threads would have
one less kernel thread to utilize for remaining work.
Images Affected:
- [SYSLIB]PTHREAD$RTL.EXE
- [SYSLIB]PTHREAD$DBGSHR.EXE
o A request to wake an idle (hibernating) null thread can be
ignored. This can lead to an application hang, if the
application logic requires the kernel thread, on which the
null thread would have run, to execute prior to other parts of
the application.
Images Affected:
- [SYSLIB]PTHREAD$RTL.EXE
- [SYSLIB]PTHREAD$DBGSHR.EXE
o A deadlock can occur when a thread running on one virtual
processor (VP) blocks while holding an internal lock associated
with a different VP.
Images Affected:
- [SYSLIB]PTHREAD$RTL.EXE
- [SYSLIB]PTHREAD$DBGSHR.EXE
o Applications that do frequent, short-duration, timed waits may
affect overall performance.
Images Affected:
- [SYSLIB]PTHREAD$RTL.EXE
- [SYSLIB]PTHREAD$DBGSHR.EXE
o On a system with more than 16 CPUs, a threaded image can crash
during initialization.
Images Affected:
- [SYSLIB]PTHREAD$RTL.EXE
- [SYSLIB]PTHREAD$DBGSHR.EXE
Problems Addressed in VMS721_PTHREAD-V0100:
o A customer's application, when run with upcalls enabled, can die
with an ACCVIO. This is the result of a stack overflow while
running the application's exit handling routine.
o When a thread calls pthread_exit() the entire process is incorrectly
terminated by a %CMA-F-EXIT_THREAD error instead of simply
terminating the calling thread.
o Pagefault Completion Errors
Pagefault completions accumulate (as observed via the "pthread show
-u" command to SDA), with the corresponding waiting threads having
been, apparently, unblocked without consuming (i.e., freeing) the
completions. Also, sometimes threads are found waiting indefinitely
for completions (although this effect was never successfully
reproduced in-house), while other, mismatched completions remain
pending.
o Reduced performance and/or process threads hang.
INSTALLATION NOTES:
No reboot is necessary after successful installation of the kit.
INSTALLATION INSTRUCTIONS:
Install this kit with the POLYCENTER Software installation utility
by logging into the SYSTEM account, and typing the following at the
DCL prompt:
PRODUCT INSTALL VMS721_PTHREAD /SOURCE=[location of Kit]
The kit location may be a tape drive, CD, or a disk directory that
contains the kit.
Additional help on installing PCSI kits can be found by typing
HELP PRODUCT INSTALL at the system prompt
All trademarks are the property of their respective owners.
This patch can be found at any of these sites:
Colorado Site
Georgia Site
Files on this server are as follows:
dec-axpvms-vms721_pthread-v0300--4.README
dec-axpvms-vms721_pthread-v0300--4.CHKSUM
dec-axpvms-vms721_pthread-v0300--4.pcsi-dcx_axpexe
vms721_pthread-v0300.CVRLET_TXT
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