[NSWI131] 03-counter-spinner - papi problem

[Petr Tůma]

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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