Re: [PATCH v2 00/23] Intel vendor events and TMA 5.01 metrics

["Liang, Kan" <kan.liang@linux.intel.com>]

On 2025-01-17 11:03 a.m., Liang, Kan wrote:
> 
> 
> On 2025-01-16 1:43 a.m., Ian Rogers wrote:
>> Update the Intel vendor events to the latest.
>> Update the metrics to TMA 5.01.
>> Add Arrowlake and Clearwaterforest support.
>> Add metrics for LNL and GNR.
>> Address IIO uncore issue spotted on EMR, GRR, GNR, SPR and SRF.
>>
>> The perf json was generated using the script:
>> https://github.com/intel/perfmon/blob/main/scripts/create_perf_json.py
>> with the generated json being in:
>> https://github.com/intel/perfmon/tree/main/scripts/perf
>>
>> Thanks to Perry Taylor <perry.taylor@intel.com>, Caleb Biggers
>> <caleb.biggers@intel.com>, Edward Baker <edward.baker@intel.com> and
>> Weilin Wang <weilin.wang@intel.com> for helping get this patch series
>> together.
>>
>> v2: Fix hybrid and Co-authored-by tag issues reported by
>>     Arnaldo. Updates to Lunarlake and Meteorlake events. Addition of
>>     Clearwaterforest.
> 
> Thanks Ian!
> 
> Acked-by: Kan Liang <kan.liang@linux.intel.com>
> 

Thanks Thomas to do more tests for the series.

There is an issue for the FP_ARITH* related metrics on hybrid platforms.
I have to take the acked-by back. Sorry for the noise.

Here is the issue on ADL and ARL.

$ sudo ./perf stat -M tma_info_inst_mix_iparith -a sleep 1
Cannot resolve IDs for tma_info_inst_mix_iparith: INST_RETIRED.ANY /
(FP_ARITH_INST_RETIRED.SCALAR + FP_ARITH_INST_RETIRED.VECTOR)


The patch set add the tma_info_inst_mix_iparith for cpu_atom.

+    {
+        "BriefDescription": "Instructions per FP Arithmetic instruction
(lower number means higher occurrence rate)",
+        "MetricExpr": "INST_RETIRED.ANY / (FP_ARITH_INST_RETIRED.SCALAR
+ FP_ARITH_INST_RETIRED.VECTOR)",
+        "MetricGroup": "Flops;InsType;Inst_Metric",
+        "MetricName": "tma_info_inst_mix_iparith",
+        "MetricThreshold": "tma_info_inst_mix_iparith < 10",
+        "PublicDescription": "Instructions per FP Arithmetic
instruction (lower number means higher occurrence rate). Values < 1 are
possible due to intentional FMA double counting. Approximated prior to BDW",
+        "Unit": "cpu_atom"
+    },

However, the FP_ARITH_INST_RETIRED.SCALAR and
FP_ARITH_INST_RETIRED.VECTOR event are only available for cpu_core.

sudo ./perf stat -e FP_ARITH_INST_RETIRED.SCALAR -a sleep 1

 Performance counter stats for 'system wide':

                 0      cpu_core/FP_ARITH_INST_RETIRED.SCALAR/

There should be no such metric for cpu_atom.

Thanks,
Kan