PAPI Forum

Dear PAPI Users,

I apologise if the issue that I am facing has already been discussed and addressed before.

I have installed papi-5.3.0 on my Linux UBUNTU machine (8 cores Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz).

I use 'rapl' component to measure power. My application which calls PAPI_Library_init and PAPI_shutdown as follows throws SIGSEGV:

Code: Select all

int main() {
     PAPI_library_init(PAPI_VER_CURRENT);
     /* Find RAPL component */
     /* Create event set */
     PAPI_start(eventSet);
     /* Execute a user function */
     /* cleanup event set */
     /* destroy event set */
     PAPI_shutdown();

[color=#FF0000]     PAPI_library_init(PAPI_VER_CURRENT);[/color] /* SIGSEGV happens here */
     /* Find RAPL component */
     /* Create event set */
     PAPI_start(eventSet);
     /* Execute a user function */
     /* cleanup event set */
     /* destroy event set */
     PAPI_shutdown();     
}


As you can see, I am calling PAPI_library_init() and then PAPI_shutdown() to free all the resources and then I call PAPI_library_init() again.

The valgrind output shows "invalid read" errors, which are reproduced below:

==26654== Invalid read of size 8
==26654== at 0x4A22CE: pfm_perf_get_event_attr_info (pfmlib_perf_event_pmu.c:736)
==26654== by 0x49EDDF: pfmlib_build_event_pattrs (pfmlib_common.c:961)
==26654== by 0x4A0529: pfm_get_event_info (pfmlib_common.c:1576)
==26654== by 0x497C21: allocate_native_event (pe_libpfm4_events.c:171)
==26654== by 0x497FE4: _pe_libpfm4_ntv_name_to_code (pe_libpfm4_events.c:816)
==26654== by 0x493079: _papi_load_preset_table (papi_preset.c:492)
==26654== by 0x4990D0: _pe_libpfm4_init (pe_libpfm4_events.c:1427)
==26654== by 0x4964AB: _pe_init_component (perf_event.c:1606)
==26654== by 0x48C37B: _papi_hwi_init_global (papi_internal.c:1705)
==26654== by 0x48A0C4: PAPI_library_init (papi.c:612)
...
==26654== Address 0x8b9a2b0 is 0 bytes after a block of size 131,072 alloc'd
==26654== at 0x4C2CE8E: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==26654== by 0x4A1238: perf_table_alloc_umask (pfmlib_perf_event_pmu.c:295)
==26654== by 0x4A1640: gen_tracepoint_table (pfmlib_perf_event_pmu.c:417)
==26654== by 0x4A1896: pfm_perf_init (pfmlib_perf_event_pmu.c:490)
==26654== by 0x49E167: pfmlib_pmu_activate (pfmlib_common.c:545)
==26654== by 0x49E38E: pfmlib_init_pmus (pfmlib_common.c:626)
==26654== by 0x49E523: pfm_initialize (pfmlib_common.c:689)
==26654== by 0x4AAEB4: _papi_libpfm4_init (papi_libpfm4_events.c:105)
==26654== by 0x49648A: _pe_init_component (perf_event.c:1599)
==26654== by 0x48C37B: _papi_hwi_init_global (papi_internal.c:1705)
==26654== by 0x48A0C4: PAPI_library_init (papi.c:612)
==26654==
==26654==
==26654== Process terminating with default action of signal 11 (SIGSEGV)
==26654== Access not within mapped region at address 0x125FCAB0
==26654== at 0x4A22CE: pfm_perf_get_event_attr_info (pfmlib_perf_event_pmu.c:736)
==26654== by 0x49EDDF: pfmlib_build_event_pattrs (pfmlib_common.c:961)
==26654== by 0x4A0529: pfm_get_event_info (pfmlib_common.c:1576)
==26654== by 0x497C21: allocate_native_event (pe_libpfm4_events.c:171)
==26654== by 0x497FE4: _pe_libpfm4_ntv_name_to_code (pe_libpfm4_events.c:816)
==26654== by 0x493079: _papi_load_preset_table (papi_preset.c:492)
==26654== by 0x4990D0: _pe_libpfm4_init (pe_libpfm4_events.c:1427)
==26654== by 0x4964AB: _pe_init_component (perf_event.c:1606)
==26654== by 0x48C37B: _papi_hwi_init_global (papi_internal.c:1705)
==26654== by 0x48A0C4: PAPI_library_init (papi.c:612)

Please let me know if my use of the PAPI functions is erroneous.

Thanks a lot for your help.

Best Regards
Manumachu

Version 5.3.0 is almost over one year old.
Could you please try the PAPI git version and let us know if you still get the same problem?

git clone https://icl.cs.utk.edu/git/papi.git

Thanks,
Heike

Hi Heike,

I have tried the latest PAPI version through the 'git clone' command.

There is a problem. Please find attached the test file I used for the bug verification.

To summarize, the test file has the following function call order:

Code: Select all

PAPI_library_init
PAPI_create_eventset
PAPI_start
PAPI_stop
PAPI_cleanup_eventset
PAPI_destroy_eventset
PAPI_shutdown

PAPI_library_init
PAPI_create_eventset
PAPI_start
PAPI_stop
PAPI_cleanup_eventset
PAPI_destroy_eventset
PAPI_shutdown

When I call 'PAPI_library_init' for the second time, I get the following error:

rdmsr:pread: No such file or directory

However, if I remove 'PAPI_shutdown', I am able to run the test successfully.

Best Regards
Manumachu