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Re: [ptp-user] Need help about setting up and debugging!

Greg,
I'm definitely sure the name appearing in the "Debugger session address" field of the "Debugger" tab in the launch configuration is the right one. My frontend hostname is "frontend", and each node knows that very well, since they are sharing part of the frontend filesystem, and this is set referencing the frontend hostname. I tried to put a completely false address in that field, and the error message returned by the debugger is merely different, complaining that :

ORTE@Local: Debugger error: Proxy server error: could not find host

which does not appear when I put the right hostname/address
I'm starting to think it could be a gdb version problem....I mean, is it possible that, for some crazy reason, this gdb version cannot handle the .gnu.hash section(s) of a binary process/executable (in this case, the executable gdb is complaining about would be /lib64/ld-linux-x86-64.so.2 )....I'm talking randomly, because I've absolutely no idea of what the heck is the " .gnu.hash " section....
BTW, the gdb version is 6.4.90. Do you know if it may be better upgrading GDB?
Thanks,
Fabio

2008/6/27 Greg Watson <g.watson@xxxxxxxxxxxx>:
Fabio,

What do you have in the "Debugger session address" field of the "Debugger" tab in the launch configuration? Please make sure it's the hostname of the machine you're running Eclipse on, and that this machine is accessible from the other nodes using this hostname.

Greg

On Jun 27, 2008, at 12:31 PM, Fabio Meneghini wrote:

Ok, thank you.
I just found out another interesting thing: when I launch the PTP parallel debugger (in eclipse) WITH JUST ONE PROCESSOR, the usual "Debugger has started, waiting for connection" window stucks, and all sinks.
in the console terminal, all appears is:

debug: waiting for connect
ORTE@Local: Debugger error: Proxy server error: could not find host

And then, once i hit the cancel button from the "Debugger has started, waiting for connection" window, the following appears in the console terminal:

calling session finish
debug: received message event
Msg: EventRequestManager - addEventRequest(): Request: Suspend request in status [5] for 0.
Msg: EventRequestManager - addEventRequest(): Request: Terminate request in status [5] for 0.
Msg: EventRequestManager - addEventRequest(): Request: Stop debugger request in status [5] for .
Error completing debug job launch: Cannot connect to debugger
**** Msg: AbstractEventManager - registerEventRequest(): Request: Suspend request in status [5] for 0.
**** Msg: AbstractEventManager - notifyEventRequest(): Request: Suspend request in status [1] for 0



Hope this could help....
Thanks,
best

Fabio


2008/6/27 Beth Tibbitts <tibbitts@xxxxxxxxxx>:

That's good. that's what you should be doing for your setup. Just making sure.


...Beth

Beth Tibbitts (859) 243-4981 (TL 545-4981)
High Productivity Tools / Parallel Tools http://eclipse.org/ptp
IBM T.J.Watson Research Center
Mailing Address: IBM Corp., 745 West New Circle Road, Lexington, KY 40511
<graycol.gif>"Fabio Meneghini" <fab.meneghini@xxxxxxxxx>


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Re: [ptp-user] Need help about setting up and debugging!
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yeah, that's right.....so what?

Fabio

2008/6/27 Beth Tibbitts <tibbitts@xxxxxxxxxx>:
    Dumb question: you're running Eclipse on the frontend node, right? you have an ORTE@Local local resource manager (not remote)



    ...Beth

    Beth Tibbitts (859) 243-4981 (TL 545-4981)
    High Productivity Tools / Parallel Tools
    http://eclipse.org/ptp
    IBM T.J.Watson Research Center
    Mailing Address: IBM Corp., 745 West New Circle Road, Lexington, KY 40511
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    Re: [ptp-user] Need help about setting up and debugging!
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    Greg,
    I just did what you told me to. I tried on each of the 8 nodes (included the frontend), to run the sequential gdb debugger (from the console terminal) with the program, and it's perfectly working, from the start to the end. I'm able to watch variables, set breakpoints wherever I want...
    What else could I try?
    Thanks,
    Fabio


    2008/6/27 Greg Watson <
    g.watson@xxxxxxxxxxxx>:
        Fabio,

        I get virtually identical output to you up to the "don't know how to handle OS specific section" line, so it looks like this is causing the problem.


        Can you try the following:


        1. Log into one of the nodes and run 'gdb myprog' where myprog is the MPI program you're trying to run.
        2. Set a breakpoint in main using the command 'set breakpoint main'.
        3. Start the program using 'run'.


        Let me know if you see any error messages or if gdb fails.


        Thanks,


        Greg


        On Jun 27, 2008, at 7:31 AM, Fabio Meneghini wrote:
                Hi Greg,
                first thanks for you helping me,
                BTW, the machine is a linux cluster, composed by 8 single-processor computers interconnected, frontend included.
                Some moths ago I found that there was no gdb installed on the nodes, but only in the frontend (which is usually part of the computational nodes). So I copied the gdb binary from the frontend to the local folders on the other nodes. Now, when I access (through ssh or rsh) each node, I am able to run the gdb on that node, simply with the command /usr/bin/gdb
                So I suppose this might be ok.

                Regarding my citation: nevermind. Now, don't ask me why, the situation is somewhat different:
                First, as I start Eclipse, the following message appears in the terminal: "ORTE@Local: proxy connected"
                ok. That's awesome

                Then, it's time to start parallel debugging! then I launch the parallel debugger, with 8 processors, and:
                as the usual "Debugger has started...etc etc" window appears, it disappears almost instantly, and an error message raises up:
                "Handling debug Event....
                reason:
                See Details..."
                So I go to see the terminal, and the following results the output from the very moment I made the debugger run:

                debug: waiting for connect
                debug: received connected event
                Msg: EventRequestManager - addEventRequest(): Request: Start debugger request in
                status [5] for 0-7.
                **** Msg: AbstractEventManager - registerEventRequest(): Request: Start debugger
                request in status [5] for 0-7.
                Msg: SDMEventManager - update(): Event: EVENT_DBG_OK transid=1 8:FF
                Msg: SDMEventManager - fireEvent(): added PDIEvent: org.eclipse.ptp.debug.intern
                al.core.pdi.event.ConnectedEvent@4365d26c
                Msg: NotifyJob - size of runnables: 3
                **** Msg: AbstractEventManager - notifyEventRequest(): Request: Start debugger r
                equest in status [3] for .
                Msg: NotifyJob - size of runnables: 3
                Msg: EventRequestManager - addEventRequest(): Request: Set Function Breakpoint R
                equest in status [5] for 0-7.
                **** Msg: AbstractEventManager - registerEventRequest(): Request: Set Function B
                reakpoint Request in status [5] for 0-7.
                Msg: EventRequestManager - addEventRequest(): Request: Resume request in status
                [5] for 0-7.
                Msg: SDMEventManager - update(): Event: EVENT_DBG_OK transid=1 8:FF
                **** Msg: AbstractEventManager - notifyEventRequest(): Request: Set Function Bre akpoint Request in status [3] for .
                **** Msg: AbstractEventManager - notifyEventRequest(): Request: Resume request i n status [3] for 0-7.
                Msg: NotifyJob - size of runnables: 5
                ================= TIME RESUME: 1214569632785
                ORTE@Local: BFD: /lib64/ld-linux-x86-64.so.2: don't know how to handle OS specif ic section `.gnu.hash' [0x6ffffff6]
                Msg: SDMEventManager - update(): Event: EVENT_DBG_EXIT transid=1 8:FF 177
                Msg: SDMEventManager - fireEvent(): added PDIEvent: org.eclipse.ptp.debug.intern al.core.pdi.event.DestroyedEvent@3bb505fe
                Msg: EventRequestManager - addEventRequest(): Request: Stop debugger request in status [5] for .
                Msg: SDMEventManager - fireEvent(): added PDIEvent: org.eclipse.ptp.debug.intern al.core.pdi.event.DisconnectedEvent@72282e3b
                **** Msg: AbstractEventManager - notifyEventRequest(): Request: Stop debugger re quest in status [3] for .
                calling session finish
                Msg: NotifyJob - size of runnables: 4
                debug: received disconnected event
                ORTE@Local: sdm: shutdown completed


                Any hints?
                thanks, again.
                Fabio


                2008/6/27 Greg Watson <
                g.watson@xxxxxxxxxxxx>:
                Fabio,


                What sort of machine are you using? Is it a cluster or an 8 cpu SMP?


                Can you explain what you mean when you say "I can rapidly see the eight blocks representing the processors (in the machine view) becoming green, then all suddenly stops, after one second."? Do you mean the process icons change color at this point?


                The first trace you sent looks ok up to the point:
                        ORTE@Local: BFD: /lib64/ld-linux-x86-64.so.2: don't know how to handle OS specific section `.gnu.hash' [0x6ffffff6]

                This looks like a message from GDB. It's possible GDB is exiting at this point which may be causing the problem. Is there any delay between this message and the next:
                        Msg: SDMEventManager - update(): Event: EVENT_DBG_EXIT transid=1 8:FF 177

                Thanks,


                Greg



                On Jun 27, 2008, at 5:25 AM, Fabio Meneghini wrote:
                        P.S. I was forgetting.....
                        when I hit the cancel button, in the "Debugger has started, waiting for connection...." window, the following appears in the console terminal:
                        calling session finish
                        debug: received message event
                        Msg: EventRequestManager - addEventRequest(): Request: Suspend request in status [5] for 0-4.
                        Error completing debug job launch: Cannot connect to debugger
                        Msg: EventRequestManager - addEventRequest(): Request: Terminate request in status [5] for 0-4.
                        Msg: EventRequestManager - addEventRequest(): Request: Stop debugger request in status [5] for .
                        **** Msg: AbstractEventManager - registerEventRequest(): Request: Suspend request in status [5] for 0-4.
                        **** Msg: AbstractEventManager - notifyEventRequest(): Request: Suspend request in status [1] for 0-4.


                        ...



                        2008/6/27 Fabio Meneghini <
                        fab.meneghini@xxxxxxxxx>:
                            hi again, now I noticed another weird thing: if I set the number of processors other than 8 (8 is the maximum number of processors of my machine), e.g. 5 or 3, or 2.... when I give the debug command, it stucks in the "Debugger has started, waiting for connection...." window....and it remains there forever, while in the terminal (from which I launched Eclipse) the following appears:

                            debug: waiting for connect

                            ORTE@Local: Debugger error: Proxy server error: could not find host
                            Again, please take note that
                            ORTE@Local is my Resource Manager, that is supposed to be perfectly working, since I use it in the Run Sessions (instead of Debug Sessions) and it works great.

                            Please, help...I'm going mad...
                            Best
                            Fabio


                            2008/6/27 Fabio Meneghini <
                            fab.meneghini@xxxxxxxxx>:

                            Hi Clement,
                            ok, I usually start eclipse from command line, just in order to see events messages...here's the output messages when I try to parallel debug my application:


                            CDT version: 4.0.3.200802251018
                            debug: waiting for connect
                            debug: received connected event
                            Msg: EventRequestManager - addEventRequest(): Request: Start debugger request in status [5] for 0-7.
                            **** Msg: AbstractEventManager - registerEventRequest(): Request: Start debugger request in status [5] for 0-7.
                            Msg: SDMEventManager - update(): Event: EVENT_DBG_OK transid=1 8:FF
                            Msg: SDMEventManager - fireEvent(): added PDIEvent:
                            org.eclipse.ptp.debug.internal.core.pdi.event.ConnectedEvent@615c6e8d
                            Msg: NotifyJob - size of runnables: 3
                            **** Msg: AbstractEventManager - notifyEventRequest(): Request: Start debugger request in status [3] for .
                            Msg: NotifyJob - size of runnables: 3
                            Msg: EventRequestManager - addEventRequest(): Request: Set Function Breakpoint Request in status [5] for 0-7.
                            **** Msg: AbstractEventManager - registerEventRequest(): Request: Set Function Breakpoint Request in status [5] for 0-7.
                            Msg: EventRequestManager - addEventRequest(): Request: Resume request in status [5] for 0-7.
                            Msg: SDMEventManager - update(): Event: EVENT_DBG_OK transid=1 8:FF
                            **** Msg: AbstractEventManager - notifyEventRequest(): Request: Set Function Breakpoint Request in status [3] for .
                            **** Msg: AbstractEventManager - notifyEventRequest(): Request: Resume request in status [3] for 0-7.
                            Msg: NotifyJob - size of runnables: 5
                            ================= TIME RESUME: 1214557631787

                            ORTE@Local: BFD: /lib64/ld-linux-x86-64.so.2: don't know how to handle OS specific section `.gnu.hash' [0x6ffffff6]
                            Msg: SDMEventManager - update(): Event: EVENT_DBG_EXIT transid=1 8:FF 177
                            Msg: SDMEventManager - fireEvent(): added PDIEvent:
                            org.eclipse.ptp.debug.internal.core.pdi.event.DestroyedEvent@15bde556
                            Msg: EventRequestManager - addEventRequest(): Request: Stop debugger request in status [5] for .
                            Msg: SDMEventManager - fireEvent(): added PDIEvent:
                            org.eclipse.ptp.debug.internal.core.pdi.event.DisconnectedEvent@44f4ccc0
                            **** Msg: AbstractEventManager - notifyEventRequest(): Request: Stop debugger request in status [3] for .
                            calling session finish
                            Msg: NotifyJob - size of runnables: 4

                            ORTE@Local: sdm: shutdown completed
                            Please note that
                            ORTE@local is the Resource Manager I created. Just One thing to note: When I created this resource manager, there were no possibility to select a Multiplexing option (just "none" selected), in the PTP -> Resource Manager-> Open RTE preferences, the "port forwarding" multiplexing option is selected instead.

                            What should I do?


                            Thanks again,
                            best
                            Fabio



                            2008/6/27 Clement Kam Man Chu <
                            clement.chu@xxxxxxxxxxxxxxxxxxxxxx>:
                                Hi Fabio,

                                How do you start up eclipse? You can try to start up eclipse on command line, then you can see ptp debug message on command line window. If possible, please send me a copy. Thanks.

                                Regards,
                                Clement

                                Fabio Meneghini wrote:
                                ok, thank you very much: I'm done with the Resource Manager. Successfully cvreated, following the instructions in the help!!!
                                Now, I managed to set-up the running configuration, and tried it within the PTP Runtime Perspective, and it works, great!
                                But, still I can't debug: seems weird, but as I start debugging (with 8 processors), I can rapidly see the eight blocks representing the processors (in the machine view) becoming green, then all suddenly stops, after one second. Actually I'm pretty good in parallel programming, but not THIS good! :-)
                                I'm sure there is no mistake in the code, and the program itself, since when I run it, either from command line (mpirun, etc etc) , or from the Parallel Run command in eclipse, it does what it's supposed to.
                                In the console windows no messages appears, where can I look for some error message occurred?
                                Thanks again,
                                best
                                Fabio


                                2008/6/26 Beth Tibbitts <
                                tibbitts@xxxxxxxxxx <mailto:tibbitts@xxxxxxxxxx>>:


                                There is another walk-thru of the setup steps in a recent tutorial
                                we gave.
                                See the PTP tutorials page:
                                http://wiki.eclipse.org/PTP/tutorials
                                and get the slides from the TACC tutorial on May 16.




                                ...Beth

                                Beth Tibbitts (859) 243-4981 (TL 545-4981)
                                High Productivity Tools / Parallel Tools
                                http://eclipse.org/ptp
                                IBM T.J.Watson Research Center
                                Mailing Address: IBM Corp., 745 West New Circle Road, Lexington,
                                KY 40511
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                                Re: [ptp-user] Need help about setting up and debugging!






                                I just removed the eclipse ganymede, and installed the europa.
                                Then the same procedure to install the PTP 2.0, with the same
                                BUILD command. Again, the building seems to go ok: the binaries
                                are created, BUT, again, whenever I try to set up a new parallel
                                debug configuration, Eclipse complain about no Resource Manager
                                selected, showing me an empty list of choices....
                                I can't really figure out what's wrong....

                                Fabio


                                2008/6/26 Fabio Meneghini <
                                _fab.meneghini@gmail.com_
                                <mailto:
                                fab.meneghini@xxxxxxxxx>>:


                                yes, I can. mpirun and stuff work great. Now I'll try the
                                versions of eclipse and cdt you suggested me.
                                I'll get you informed.
                                thanks,
                                best
                                fabio


                                2008/6/26 Beth Tibbitts <
                                _tibbitts@xxxxxx.com_
                                <mailto:
                                tibbitts@xxxxxxxxxx>>:

                                >Are you asking me if the mpi tests from the command line
                                run successfully?
                                Yes, for example can you do mpicc and mpirun from the
                                command line?
                                The release notes at
                                _
                                http://wiki.eclipse.org/PTP/release_notes/2.0#Install_Open_MPI_
                                cover this.
                                Let us know how you fare.



                                ...Beth

                                Beth Tibbitts (859) 243-4981 (TL 545-4981)
                                High Productivity Tools / Parallel Tools
                                _
                                http://eclipse.org/ptp_
                                IBM T.J.Watson Research Center
                                Mailing Address: IBM Corp., 745 West New Circle Road,
                                Lexington, KY 40511
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                                06/26/08
                                10:53 AM

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                                Re: [ptp-user] Need help about setting up and debugging!




                                Hi Beth
                                Thank you very much for your quick, kind and clear reply!
                                So it turns out it's a "versioning" problem, uh?
                                ok, I'll follow your advices....just one question: what do
                                you exactly mean with
                                " Did you confirm that your MPI installation (e.g. OpenMPI)
                                works from the command line first? "
                                Are you asking me if the mpi tests from the command line run
                                successfully?

                                Thanks again,
                                best
                                Fabio Meneghini


                                2008/6/26 Beth Tibbitts <
                                _tibbitts@xxxxxx.com_
                                <mailto:
                                tibbitts@xxxxxxxxxx>>:

                                Hi Fabio,
                                Sorry you have having problems.
                                PTP 2.0 was built to run with Eclipse 3.3 - Hmmm
                                we need to make the pre-reqs more explicit - we
                                check that your release is 'new enough" but not
                                'too new" methinks. :)
                                PTP 2.1, targeted at around August, will work
                                with Eclipse 3.4 (Ganymede)


                                Try it with Eclipse 3.3 and CDT _
                                4.0.3._
                                <
                                http://4.0.0.3/>

                                Did you walk thru the release notes at
                                _
                                http://wiki.eclipse.org/PTP/release_notes/2.0?_
                                Did you confirm that your MPI installation (e.g.
                                OpenMPI) works from the command line first?

                                Also, read the help in Eclipse Help > Help
                                Contents and click on PTP on the left navigation
                                area, it will walk you through the setup once
                                you launch eclipse.

                                Note that you have to configure at least one
                                "Resource Manager"
                                which can be as simple as OpenMPI/ORTE, doesn't
                                have to be a more complex scheduler.
                                A "local" resource manager means it (e.g.
                                OpenMPI) is on the same machine where your
                                Eclipse workbench (and PTP) are running.
                                A "remote" resource manager means it's on a
                                different machine.

                                ptp_orte_proxy is not meant to be run
                                stand-alone, it will be launched from PTP.



                                ...Beth

                                Beth Tibbitts (859) 243-4981 (TL 545-4981)
                                High Productivity Tools / Parallel Tools
                                _
                                http://eclipse.org/ptp_
                                IBM T.J.Watson Research Center
                                Mailing Address: IBM Corp., 745 West New Circle
                                Road, Lexington, KY 40511
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                                [ptp-user] Need help about setting up and debugging!




                                Hi all,
                                I've just downloaded the latest version of
                                eclipse for c++ developer (3.4.0), and the PTP
                                2.0 correctly installed
                                Since my installation of openmpi isn't resident
                                in canonical folder (i.e. /usr/local ), I built
                                up all the ptp binaries stuff with the command:

                                CFLAGS=-I/opt/openmpi/include/
                                LDFLAGS="-L/opt/openmpi/lib
                                -Wl,-rpath,/opt/openmpi/lib" sh BUILD

                                compilation, linking and installation seem to be
                                accomplished. No errors or problems.
                                So the binaries are actually in the right
                                folder. Then I tried to parallel debug a program
                                of mine. No way, because the debug configuration
                                stucks me with the remark: "No Resource Manager
                                has been selected". Infact, there is no resource
                                manager available in the list.
                                I do not use any external, thirdy party,
                                Resource Manager, like IBM's or something. And I
                                actually don't even understand if I need one,
                                since I didn't realize what you mean with the
                                _expression_:
                                " If you don't intend to run parallel
                                applications locally, there is no need to
                                install any resource managers ".
                                I'm supposed to run and debug parallel
                                applications locally, since I use to locally
                                access the cluster frontend, so am I supposed to
                                use a "Resource Manager", or whatever? and if
                                so, may I use the ptp_orte_proxy as a "Resource
                                Manager"? .....or what?
                                BTW, I suspect there is something wrong with the
                                ptp_orte_proxy, because when I try to execute
                                from a terminal, it results in " proxy
                                connection failed"
                                I know I could sound something sick, but I'm
                                really frustrated by this problem...all I am
                                trying to do, from weeks ago, is simply
                                debugging my parallels programs...but I can't
                                managed yet.
                                Can anybody help me, please?
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                                Research Fellow
                                Faculty of Information Technology
                                Monash University, Caulfield Campus
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