[NSWI131] 03-counter-spinner - papi problem
William Tatarko
william.tatarko at gmail.com
Fri Mar 20 23:25:45 CET 2020
Hello,
thank you very much. It finally compiles. I have actually encountered the
same StackOverflow post and tried it. However, because of the "paranoid=3"
option (which I obviously did not know about), it did not work anyway, so
changed it back to the original command.
Best regards
William
On Fri, Mar 20, 2020 at 9:36 PM Petr Tůma <petr.tuma at d3s.mff.cuni.cz> wrote:
> Hi,
>
> thanks! You're obviously right (we've had a similar issue some time ago
> but I completely forgot). I've updated the upstream Makefile, but since
> your repositories do not have tracking set up, it's probably best to just
> modify the Makefile in your clones as needed. Sorry about that.
>
> Petr
>
>
> On 20/03/2020 20:46, Karel Maděra wrote:
> > I had a similar problem, what helped was these StackOverflow question
> https://stackoverflow.com/questions/35897290/what-is-the-right-order-of-linker-flags-in-gcc
> and
> https://stackoverflow.com/questions/20731220/compile-error-gcc-lpthread-position
> .
> >
> > In a nutshell, try moving the -lpapi "option" to the last position, so
> something like this: $(CXX) $(CXXFLAGS) -O3 -Wall -o $@
> counter-spinner.cpp harness.cpp -lpapi
> >
> > From what I understand (and i may be wrong on this), the -l option is
> processed as soon as it is encountered, so if it is used before mentioning
> the files that use the library, it is discarded.
> > So it s not really an option or switch of gcc, as the form -l would
> suggest, and more like a command.
> > It used to work on older gcc versions, but then they changed some
> default properties or something.
> >
> > Karel Maděra
> > ---------- Původní e-mail ----------
> > Od: Petr Tůma <petr.tuma at d3s.mff.cuni.cz>
> > Komu: William Tatarko <william.tatarko at gmail.com>
> > Datum: 20. 3. 2020 18:33:27
> > Předmět: Re: [NSWI131] 03-counter-spinner - papi problem
> >
> >
> > Hi,
> >
> > this is seriously weird :-) and in fact exactly the same error I get
> if I omit "-lpapi" from the command line. (Why it is weird is because from
> the log you have sent, it is clear that "-lpapi" is there, and if the
> library file was missing, GCC would display an error message saying "cannot
> find -lpapi".)
> >
> > What you can try to do is see what library file the "papi_avail"
> command uses, on my machine it is something like this:
> >
> > > ldd $(which papi_avail)
> > linux-vdso.so.1 (0x...)
> > libpapi.so.5 => /lib64/libpapi.so.5 (0x...)
> > ...
> >
> > This library obviously works, or the "papi_avail" command would not
> start. As the next step, you can try to use the library on the GCC command
> line directly:
> >
> > > g++ -O3 -Wall /lib64/libpapi.so.5 -o counter-spinner
> counter-spinner.cpp harness.cpp
> >
> > (Obviously, replace the library file name with whatever ldd shows on
> your system.)
> >
> > If this also fails, and you do not see any obvious permission issues
> on the files involved, then I would recommend to simply use a lab computer
> (remote access should work) otherwise you will waste too much time with
> this.
> >
> > Petr
> >
> >
> > On 20/03/2020 10:41, William Tatarko wrote:
> > > Hello,
> > >
> > > thank you very much for the answer, but I am still unable to make
> ti work.
> > >
> > > Initially I tried to install from the Git repository. From the src
> folder I ran "./configure", "make" and then I tried "make test", which
> resulted in "PASSED". Finally I ran "make install" with sudo, because
> otherwise I got a permission denied message. Later I also tried "make
> install-all" and papi versions 6.0 and 5.7 (which allegedly worked for a
> random person on the web). I also tried to install papi-tools using the
> "apt install" command (I am running Ubuntu).
> > >
> > > Command "papi_available" show no available events, which was
> suspicious. After I ran "papi_native_avail" I got a message that
> essentially said that with paranoid=3 it cannot work. This was weird,
> because I got this error message when I was installing papi for the first
> time and I had done what the error message had asked me to do, after which
> I have not seen this error message (until running "papi_native_avail").
> Anyway, I executed "sudo sh -c 'echo -1
> >/proc/sys/kernel/perf_event_paranoid" and then "papi_available" suddenly
> showed 59 available events and "papi_native_avail" stoped complaining.
> However the compilation still throws the same error (it is in the
> attachment).
> > >
> > > I believe it was initially installed (at least) into
> "/usr/local/lib/" directory. I tried to copy it also to different folders
> ("/lib/", "/lib64/", "/usr/lib/" and "/usr/lib64/") but it did not helped
> either. I also tried to explicitly set the path by modifying the
> compilation command to "$(CXX) $(CXXFLAGS) -O3 -Wall -L/usr/local/lib/
> -lpapi -o $@ counter-spinner.cpp harness.cpp", but still no luck.
> > >
> > > Best regards
> > > William
> > >
> > > On Fri, Mar 20, 2020 at 8:09 AM Petr Tůma <
> petr.tuma at d3s.mff.cuni.cz <mailto:petr.tuma at d3s.mff.cuni.cz>> wrote:
> > >
> > > Hi,
> > >
> > > this sounds like a PAPI installation problem. It's hard to debug
> with little information, but these are the steps I would try (if they do
> not help, please include exact log of what commands you were running and
> what was the output):
> > >
> > > - Did you install using your distribution packages, or from the
> Git repository ? If the latter, did you do 'make install' ?
> > >
> > > - Do the 'papi_avail' and 'papi_native_avail' commands work, when
> launched from any directory (not just the build directory) ?
> > >
> > > - Do you have the PAPI library in your system default library
> path, e.g. /lib64/libpapi.so.* ?
> > >
> > > Hope this puts you on the right path, Petr
> > >
> > >
> > > On 19/03/2020 19:19, William Tatarko wrote:
> > > > Hello,
> > > >
> > > > I have some trouble with papi. I installed it without any
> problem (and even passed the original papi test). However when I try to run
> the make for the c++ version (without modifying the code at all) I got
> several errors like "undefined reference to `PAPI_*', where * is "stop",
> "start", "library_init" and many more. I also tried the java version (again
> without changing the code), but the run.sh script resulted in "error: PAPI
> library initialization: Invalid argument (-1)". I am probably doing
> something terribly wrong, but after about 4 hours of debugging I have not
> figured it out.
> > > >
> > > > Can anybody please help me?
> > > >
> > > > Best regards
> > > > William
> > > >
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