Re: [PATCH v3 3/7] perf vendor events: Add JSON metrics for CMN

From: Jing Zhang
Date: Thu Jun 01 2023 - 05:06:33 EST




在 2023/5/31 上午10:43, Shuai Xue 写道:
>
>
> On 2023/5/30 17:19, Jing Zhang wrote:
>> Add JSON metrics for arm CMN. Currently just add part of CMN PMU
>> metrics which are general and compatible for any SoC and CMN-ANY.
>
> Is it a typo? You mean "any SoC integration with CMN-ANY" right?
>

Yes, I will fix it in the next version.

Thanks,
Jing

> Thanks,
> Shuai
>
>>
>> Signed-off-by: Jing Zhang <renyu.zj@xxxxxxxxxxxxxxxxx>
>> ---
>> .../pmu-events/arch/arm64/arm/cmn/sys/metrics.json | 74 ++++++++++++++++++++++
>> tools/perf/pmu-events/jevents.py | 1 +
>> 2 files changed, 75 insertions(+)
>> create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
>>
>> diff --git a/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
>> new file mode 100644
>> index 0000000..e70ac1a
>> --- /dev/null
>> +++ b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
>> @@ -0,0 +1,74 @@
>> +[
>> + {
>> + "MetricName": "slc_miss_rate",
>> + "BriefDescription": "The system level cache miss rate include.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "hnf_cache_miss / hnf_slc_sf_cache_access",
>> + "ScaleUnit": "100%",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "hnf_message_retry_rate",
>> + "BriefDescription": "HN-F message retry rate indicates whether a lack of credits is causing the bottlenecks.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "hnf_pocq_retry / hnf_pocq_reqs_recvd",
>> + "ScaleUnit": "100%",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "sf_hit_rate",
>> + "BriefDescription": "Snoop filter hit rate can be used to measure the Snoop Filter efficiency.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "hnf_sf_hit / hnf_slc_sf_cache_access",
>> + "ScaleUnit": "100%",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "mc_message_retry_rate",
>> + "BriefDescription": "The memory controller request retries rate indicates whether the memory controller is the bottleneck.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "hnf_mc_retries / hnf_mc_reqs",
>> + "ScaleUnit": "100%",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "rni_actual_read_bandwidth.all",
>> + "BriefDescription": "This event measure the actual bandwidth(MB/sec) that RN-I bridge sends to the interconnect.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "rnid_rxdat_flits * 32 / 1e6 / duration_time",
>> + "ScaleUnit": "1MB/s",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "rni_actual_write_bandwidth.all",
>> + "BriefDescription": "This event measures the actual write bandwidth(MB/sec) at RN-I bridges.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "rnid_txdat_flits * 32 / 1e6 / duration_time",
>> + "ScaleUnit": "1MB/s",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "rni_retry_rate",
>> + "BriefDescription": "RN-I bridge retry rate indicates whether the memory controller is the bottleneck.",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "rnid_txreq_flits_retried / rnid_txreq_flits_total",
>> + "ScaleUnit": "100%",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + },
>> + {
>> + "MetricName": "sbsx_actual_write_bandwidth.all",
>> + "BriefDescription": "sbsx actual write bandwidth(MB/sec).",
>> + "MetricGroup": "arm_cmn",
>> + "MetricExpr": "sbsx_txdat_flitv * 32 / 1e6 / duration_time",
>> + "ScaleUnit": "1MB/s",
>> + "Unit": "arm_cmn",
>> + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
>> + }
>> +]
>> diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
>> index 2bcd07c..7cff2c6 100755
>> --- a/tools/perf/pmu-events/jevents.py
>> +++ b/tools/perf/pmu-events/jevents.py
>> @@ -256,6 +256,7 @@ class JsonEvent:
>> 'DFPMC': 'amd_df',
>> 'cpu_core': 'cpu_core',
>> 'cpu_atom': 'cpu_atom',
>> + 'arm_cmn': 'arm_cmn',
>> }
>> return table[unit] if unit in table else f'uncore_{unit.lower()}'
>>