No counters available despite papi_avail showing them

[cristobal-ortega]

papi_high.num_counters() reports 0 counters while papi_avail shows plenty of them:

$ papi_avail 
Available PAPI preset and user defined events plus hardware information.
--------------------------------------------------------------------------------
PAPI version             : 7.1.0.0
Operating system         : Linux 5.15.0-91-generic
Vendor string and code   : GenuineIntel (1, 0x1)
Model string and code    : Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz (165, 0xa5)
CPU revision             : 2.000000
CPUID                    : Family/Model/Stepping 6/165/2, 0x06/0xa5/0x02
CPU Max MHz              : 5000
CPU Min MHz              : 800
Total cores              : 12
SMT threads per core     : 2
Cores per socket         : 6
Sockets                  : 1
Cores per NUMA region    : 12
NUMA regions             : 1
Running in a VM          : no
Number Hardware Counters : 11
Max Multiplex Counters   : 384
Fast counter read (rdpmc): yes
--------------------------------------------------------------------------------

================================================================================
  PAPI Preset Events
================================================================================
    Name        Code    Avail Deriv Description (Note)
PAPI_L1_DCM  0x80000000  Yes   No   Level 1 data cache misses
PAPI_L1_ICM  0x80000001  Yes   No   Level 1 instruction cache misses
...
PAPI_TOT_CYC 0x8000003b  Yes   No   Total cycles
...
Of 108 possible events, 59 are available, of which 18 are derived.

When trying to start a counter through the high level interface or add it through the low level interface I get the following error:

    papi_low.add_event(group1, PAPI_TOT_CYC)
NameError: name 'PAPI_TOT_CYC' is not defined

libpfm is here: /usr/lib/libpfm.so

Note that I installed PAPI through the source code and not from the repo.

Thanks.

[flozz]

Hello,

The PAPI version used by your papi_avail command is the v7.1.x, this binding still use the v5.5.x... There is a PR for the v6.0.x but it is not merged yet if you want to try it.

---

For your error:

    papi_low.add_event(group1, PAPI_TOT_CYC)
NameError: name 'PAPI_TOT_CYC' is not defined

This seems to be a Python error. In the bindings, all events are defined in the events module; you must import it:

import pypapi.events
# ...
papi_low.add_event(group1, pypapi.events.PAPI_TOT_CYC)

or

from pypapi.events import PAPI_TOT_CYC
#...
papi_low.add_event(group1, PAPI_TOT_CYC)