10 More Discussions You Might Find Interesting
1. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
I am VERY much a neophyte with shell scripting. I am working on the following,
1. The problem statement, all variables and given/known data:
"Create a script sends an... (7 Replies)
Discussion started by: doghouse308
7 Replies
2. Shell Programming and Scripting
So here I have a simple function that I wish to debug. However, I am unable to debug the desired function even with set -o functrace enabled. Before resorting to asking this question, I had managed to find a possible solution that did not produce the desired results, which is located here.
How... (5 Replies)
Discussion started by: BrandonD
5 Replies
3. Programming
hey
i have a problem with a switch case in program and the debugger is messy has hell ( we use normal VI and gdb in our schoool to make it more diffiacult)
any way i have a problom where for some unknown reason the debugger just skips a switch statment as if it wasent even there
the rest... (2 Replies)
Discussion started by: gotenxds
2 Replies
4. Homework & Coursework Questions
School:Syrian Virtual University - Bachelor in Information Technology - Tutor: A.Issa - course: S10-iti320
hi all, would you please help me correcting and debugging this script: fx-permiss.sh which accepts a list of users as argument resiting those files permissions:
say our directory... (0 Replies)
Discussion started by: erzal
0 Replies
5. Shell Programming and Scripting
hi all, would you please help me correcting and debugging this script: fx-permiss.sh which accepts a list of users as argument resiting those files permissions:
say our directory structure:
/home/erzal/file
/home/erzal/dire
/home/erzal/share
/home/erzal/share/file
/home/erzal/share/dire
1-... (1 Reply)
Discussion started by: erzal
1 Replies
6. Shell Programming and Scripting
is there any way you can add a breakpoint in a script so you can stop on it?
i have used -xv in my shebang but the script just runs and i want it to stop at a specific point in the script.
appreciate any help. (1 Reply)
Discussion started by: npatwardhan
1 Replies
7. Programming
Hi i want to debug the C program with GDB debugger. I want to debug the program by line by line. I want to debug program like as we debug the program in Turbo-C using the F8. Can any one help me?
I know i have to use single stepping. But i don't know how to use it. Any help can be appreciated..... (5 Replies)
Discussion started by: ps_sach
5 Replies
8. Solaris
when I tried to debug my application i got the following.
gdb -v
GNU gdb 6.6
file is in C and Xmotiff Languages
(gdb) attach 25499
Attaching to process 25499
Retry #1:
Retry #2:
Retry #3:
Retry #4:
0xfea40b68 in ?? ()
(gdb) where
#0 0xfea40b68 in ?? () (0 Replies)
Discussion started by: satish@123
0 Replies
9. Solaris
OS : SOLARIS 10
debug tool :$gdb -v
GNU gdb 6.6
compiler : $gcc -v
gcc version 2.95.3 20010315 (release)
When i tried to debug my application i got the following error.
$gdb Pal
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
This GDB was... (2 Replies)
Discussion started by: satish@123
2 Replies
10. Shell Programming and Scripting
Hi,
If we want to debug a shell script, then set -vx has to be included in the begining of the script. Just i want to know what purpose -vx is used.
Thanks in advace
Sarwan (2 Replies)
Discussion started by: sarwan
2 Replies
OPAL_CRS(7) Open MPI OPAL_CRS(7)
NAME
OPAL_CRS - Open PAL MCA Checkpoint/Restart Service (CRS): Overview of Open PAL's CRS framework, and selected modules. Open MPI 1.4.5.
DESCRIPTION
Open PAL can involuntarily checkpoint and restart sequential programs. Doing so requires that Open PAL was compiled with thread support
and that the back-end checkpointing systems are available at run-time.
Phases of Checkpoint / Restart
Open PAL defines three phases for checkpoint / restart support in a procress:
Checkpoint
When the checkpoint request arrives, the procress is notified of the request before the checkpoint is taken.
Continue
After a checkpoint has successfully completed, the same process as the checkpoint is notified of its successful continuation of execu-
tion.
Restart
After a checkpoint has successfully completed, a new / restarted process is notified of its successful restart.
The Continue and Restart phases are identical except for the process in which they are invoked. The Continue phase is invoked in the same
process as the Checkpoint phase was invoked. The Restart phase is only invoked in newly restarted processes.
GENERAL PROCESS REQUIREMENTS
In order for a process to use the Open PAL CRS components it must adhear to a few programmatic requirements.
First, the program must call OPAL_INIT early in its execution. This should only be called once, and it is not possible to checkpoint the
process without it first having called this function.
The program must call OPAL_FINALIZE before termination. This does a significant amount of cleanup. If it is not called, then it is very
likely that remnants are left in the filesystem.
To checkpoint and restart a process you must use the Open PAL tools to do so. Using the backend checkpointer's checkpoint and restart tools
will lead to undefined behavior. To checkpoint a process use opal_checkpoint (opal_checkpoint(1)). To restart a process use opal_restart
(opal_restart(1)).
AVAILABLE COMPONENTS
Open PAL ships with two CRS components: self and blcr.
The following MCA parameters apply to all components:
crs_base_verbose
Set the verbosity level for all components. Default is 0, or silent except on error.
crs_base_snapshot_dir
The directory to store the checkpoint snapshots. Default is /tmp.
self CRS Component
The self component invokes user-defined functions to save and restore checkpoints. It is simply a mechanism for user-defined functions to
be invoked at Open PAL's Checkpoint, Continue, and Restart phases. Hence, the only data that is saved during the checkpoint is what is
written in the user's checkpoint function. No libary state is saved at all.
As such, the model for the self component is slightly differnt than for other components. Specifically, the Restart function is not invoked
in the same process image of the process that was checkpointed. The Restart phase is invoked during OPAL_INIT of the new instance of the
applicaiton (i.e., it starts over from main()).
The self component has the following MCA parameters:
crs_self_prefix
Speficy a string prefix for the name of the checkpoint, continue, and restart functions that Open PAL will invoke during the respective
stages. That is, by specifying "-mca crs_self_prefix foo" means that Open PAL expects to find three functions at run-time:
int foo_checkpoint()
int foo_continue()
int foo_restart()
By default, the prefix is set to "opal_crs_self_user".
crs_self_priority
Set the self components default priority
crs_self_verbose
Set the verbosity level. Default is 0, or silent except on error.
crs_self_do_restart
This is mostly internally used. A general user should never need to set this value. This is set to non-0 when a the new process should
invoke the restart callback in OPAL_INIT. Default is 0, or normal execution.
blcr CRS Component
The Berkeley Lab Checkpoint/Restart (BLCR) single-process checkpoint is a software system developed at Lawrence Berkeley National Labora-
tory. See the project website for more details:
http://ftg.lbl.gov/CheckpointRestart/CheckpointRestart.shtml
The blcr component has the following MCA parameters:
crs_blcr_priority
Set the blcr components default priority.
crs_blcr_verbose
Set the verbosity level. Default is 0, or silent except on error.
none CRS Component
The none component simply selects no CRS component. All of the CRS function calls return immediately with OPAL_SUCCESS.
This component is the last component to be selected by default. This means that if another component is available, and the none component
was not explicity requested then OPAL will attempt to activate all of the available components before falling back to this component.
SEE ALSO
opal_checkpoint(1), opal_restart(1)
1.4.5 Feb 10, 2012 OPAL_CRS(7)