message: zero fixed counters if perf API is not used
  potential fix for
diff: @@ -2592,6 +2592,9 @@ PCM::ErrorCode PCM::programCoreCounters(const int i /* core */,
  ctrl_reg.fields.reserved1 = 0;
  }
  + MSR[i]->write(INST_RETIRED_ANY_ADDR, 0);
  + MSR[i]->write(CPU_CLK_UNHALTED_THREAD_ADDR, 0);
  + MSR[i]->write(CPU_CLK_UNHALTED_REF_ADDR, 0);
  MSR[i]->write(IA32_CR_FIXED_CTR_CTRL, ctrl_reg.value);
  }
  