Re: [PATCH v4 2/2] perf vendor events hygon: Add Hygon Data Fabric PMU events and metrics

Qi Liu <[email protected]> Tue, 18 Aug 2026 11:12:00 +0800
Newsgroups	org.kernel.vger.linux-perf-users,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>
Hi Ian，

Thanks for your reply:)

On 8/18/2026 6:12 AM, Ian Rogers wrote:
> On Tue, Aug 4, 2026 at 12:00 AM Qi Liu <[email protected]> wrote:
>>
>> Add perf JSON event definitions and metrics for the Hygon Data Fabric (DF)
>> uncore PMU.
>>
>> Signed-off-by: Qi Liu <[email protected]>
>> ---
>>   tools/perf/pmu-events/Build                   |   2 +-
>>   .../arch/x86/hygonm1/data-fabric.json         |  87 ++++++++++
>>   .../arch/x86/hygonm4/data-fabric.json         | 122 ++++++++++++++
>>   .../arch/x86/hygonm6/data-fabric.json         | 154 ++++++++++++++++++
>>   tools/perf/pmu-events/arch/x86/mapfile.csv    |   3 +
>>   tools/perf/pmu-events/jevents.py              |   2 +
>>   6 files changed, 369 insertions(+), 1 deletion(-)
>>   create mode 100644 tools/perf/pmu-events/arch/x86/hygonm1/data-fabric.json
>>   create mode 100644 tools/perf/pmu-events/arch/x86/hygonm4/data-fabric.json
>>   create mode 100644 tools/perf/pmu-events/arch/x86/hygonm6/data-fabric.json
>>
>> diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
>> index 372773b998e4..79a9b4cad202 100644
>> --- a/tools/perf/pmu-events/Build
>> +++ b/tools/perf/pmu-events/Build
>> @@ -95,7 +95,7 @@ endif
>>
>>   ifeq ($(JEVENTS_ARCH),$(filter $(JEVENTS_ARCH),x86 all))
>>   # Generate Intel Json
>> -INTELS := $(shell ls -d pmu-events/arch/x86/*|grep -v amdzen|grep -v mapfile.csv)
>> +INTELS := $(shell ls -d pmu-events/arch/x86/*|grep -v amdzen|grep -v hygon|grep -v mapfile.csv)
>>   INTEL_METRICS = $(foreach x,$(INTELS),$(OUTPUT)$(x)/extra-metrics.json)
>>   INTEL_METRICGROUPS = $(foreach x,$(INTELS),$(OUTPUT)$(x)/extra-metricgroups.json)
>>   GEN_JSON += $(INTEL_METRICS) $(INTEL_METRICGROUPS)
>> diff --git a/tools/perf/pmu-events/arch/x86/hygonm1/data-fabric.json b/tools/perf/pmu-events/arch/x86/hygonm1/data-fabric.json
>> new file mode 100644
>> index 000000000000..99c243bd9ba0
>> --- /dev/null
>> +++ b/tools/perf/pmu-events/arch/x86/hygonm1/data-fabric.json
>> @@ -0,0 +1,87 @@
>> +[
>> +  {
>> +    "EventName": "cpu_read_requests_cs_0",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS0",
> 
> Does "Data (64B)" mean that each count should be scaled by 64 and the
> units are bytes? In which case adding:
> "ScaleUnit": "64Bytes",
> Would cause the count to be multiplied by 64 in the perf stat output
> and the unit Bytes to be added.
> 
Thank you for pointing this out. Yes, for these CPU memory-request events, Data 
(64B) means that each count represents a 64-byte data unit. I will add 
"ScaleUnit": "64Bytes" so that perf stat reports the scaled value in Bytes.

The I/O request events are different: each request may carry either 32B or 64B, 
so I will keep those unscaled and retain the separate minimum/maximum bandwidth 
metrics.

> Would it be possible to define terms like CS0?
Thank you. I will replace uses such as CS0 with Coherent Slave 0 (CS0) in the 
event descriptions.>
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_read_requests_cs_1",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS1",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_0",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS0",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_1",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS1",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_0",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS0",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_1",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS1",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_0",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS0",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_1",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS1",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "MetricName": "cpu_memory_bandwidth",
>> +    "MetricExpr": "(cpu_read_requests_cs_0 + cpu_read_requests_cs_1 + cpu_write_requests_cs_0 + cpu_write_requests_cs_1) * 64 / (duration_time * 1e6)",
>> +    "BriefDescription": "Total CPU memory access bandwidth",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  },
>> +  {
>> +    "MetricName": "io_memory_max_bandwidth",
>> +    "MetricExpr": "(io_read_requests_cs_0 + io_read_requests_cs_1 + io_write_requests_cs_0 + io_write_requests_cs_1) * 64 / (duration_time * 1e6)",
>> +    "BriefDescription": "Maximum inbound I/O memory access bandwidth (upper bound, assuming 64B per request. Actual inbound I/O requests may be 32B or 64B)",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  },
>> +  {
>> +    "MetricName": "io_memory_min_bandwidth",
>> +    "MetricExpr": "(io_read_requests_cs_0 + io_read_requests_cs_1 + io_write_requests_cs_0 + io_write_requests_cs_1) * 32 / (duration_time * 1e6)",
>> +    "BriefDescription": "Minimum inbound I/O memory access bandwidth (lower bound, assuming 32B per request. Actual inbound I/O requests may be 32B or 64B)",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  }
>> +]
>> diff --git a/tools/perf/pmu-events/arch/x86/hygonm4/data-fabric.json b/tools/perf/pmu-events/arch/x86/hygonm4/data-fabric.json
>> new file mode 100644
>> index 000000000000..f32dcea7061c
>> --- /dev/null
>> +++ b/tools/perf/pmu-events/arch/x86/hygonm4/data-fabric.json
>> @@ -0,0 +1,122 @@
>> +[
>> +  {
>> +    "EventName": "cpu_read_requests_cs_0",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS0",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_read_requests_cs_1",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS1",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_read_requests_cs_2",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS2",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_0",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS0",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_1",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS1",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_2",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS2",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_0",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS0",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_1",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS1",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_2",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS2",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_0",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS0",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_1",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS1",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_2",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS2",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "MetricName": "cpu_memory_bandwidth",
>> +    "MetricExpr": "(cpu_read_requests_cs_0 + cpu_read_requests_cs_1 + cpu_read_requests_cs_2 + cpu_write_requests_cs_0 + cpu_write_requests_cs_1 + cpu_write_requests_cs_2) * 64 / (duration_time * 1e6)",
>> +    "MetricConstraint": "NO_GROUP_EVENTS",
>> +    "BriefDescription": "Total CPU memory access bandwidth",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  },
>> +  {
>> +    "MetricName": "io_memory_max_bandwidth",
>> +    "MetricExpr": "(io_read_requests_cs_0 + io_read_requests_cs_1 + io_read_requests_cs_2 + io_write_requests_cs_0 + io_write_requests_cs_1 + io_write_requests_cs_2) * 64 / (duration_time * 1e6)",
>> +    "MetricConstraint": "NO_GROUP_EVENTS",
>> +    "BriefDescription": "Maximum inbound I/O memory access bandwidth (upper bound, assuming 64B per request. Actual inbound I/O requests may be 32B or 64B)",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  },
>> +  {
>> +    "MetricName": "io_memory_min_bandwidth",
>> +    "MetricExpr": "(io_read_requests_cs_0 + io_read_requests_cs_1 + io_read_requests_cs_2 + io_write_requests_cs_0 + io_write_requests_cs_1 + io_write_requests_cs_2) * 32 / (duration_time * 1e6)",
>> +    "MetricConstraint": "NO_GROUP_EVENTS",
>> +    "BriefDescription": "Minimum inbound I/O memory access bandwidth (lower bound, assuming 32B per request. Actual inbound I/O requests may be 32B or 64B)",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  }
>> +]
>> diff --git a/tools/perf/pmu-events/arch/x86/hygonm6/data-fabric.json b/tools/perf/pmu-events/arch/x86/hygonm6/data-fabric.json
>> new file mode 100644
>> index 000000000000..bff5c0959d82
>> --- /dev/null
>> +++ b/tools/perf/pmu-events/arch/x86/hygonm6/data-fabric.json
>> @@ -0,0 +1,154 @@
>> +[
>> +  {
>> +    "EventName": "cpu_read_requests_cs_0",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS0",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_read_requests_cs_1",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS1",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_read_requests_cs_2",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS2",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_read_requests_cs_3",
>> +    "BriefDescription": "The number of CPU read requests to memory: Data (64B): CS3",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x07",
>> +    "ConstId": "0x3",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_0",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS0",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_1",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS1",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_2",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS2",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "cpu_write_requests_cs_3",
>> +    "BriefDescription": "The number of CPU write requests to memory: Data (64B): CS3",
>> +    "EventCode": "0x2",
>> +    "UMask": "0x08",
>> +    "ConstId": "0x3",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_0",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS0",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_1",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS1",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_2",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS2",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_read_requests_cs_3",
>> +    "BriefDescription": "The number of inbound I/O read requests to memory: Data (32B or 64B): CS3",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x0F",
>> +    "ConstId": "0x3",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_0",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS0",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x0",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_1",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS1",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x1",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_2",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS2",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x2",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "EventName": "io_write_requests_cs_3",
>> +    "BriefDescription": "The number of inbound I/O write requests to memory: Data (32B or 64B): CS3",
>> +    "EventCode": "0x3",
>> +    "UMask": "0x70",
>> +    "ConstId": "0x3",
>> +    "Unit": "HYGON_DF"
>> +  },
>> +  {
>> +    "MetricName": "cpu_memory_bandwidth",
>> +    "MetricExpr": "(cpu_read_requests_cs_0 + cpu_read_requests_cs_1 + cpu_read_requests_cs_2 + cpu_read_requests_cs_3 + cpu_write_requests_cs_0 + cpu_write_requests_cs_1 + cpu_write_requests_cs_2 + cpu_write_requests_cs_3) * 64 / (duration_time * 1e6)",
>> +    "MetricConstraint": "NO_GROUP_EVENTS",
>> +    "BriefDescription": "Total CPU memory access bandwidth",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  },
>> +  {
>> +    "MetricName": "io_memory_max_bandwidth",
>> +    "MetricExpr": "(io_read_requests_cs_0 + io_read_requests_cs_1 + io_read_requests_cs_2 + io_read_requests_cs_3 + io_write_requests_cs_0 + io_write_requests_cs_1 + io_write_requests_cs_2 + io_write_requests_cs_3) * 64 / (duration_time * 1e6)",
>> +    "MetricConstraint": "NO_GROUP_EVENTS",
>> +    "BriefDescription": "Maximum inbound I/O memory access bandwidth (upper bound, assuming 64B per request. Actual inbound I/O requests may be 32B or 64B)",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  },
>> +  {
>> +    "MetricName": "io_memory_min_bandwidth",
>> +    "MetricExpr": "(io_read_requests_cs_0 + io_read_requests_cs_1 + io_read_requests_cs_2 + io_read_requests_cs_3 + io_write_requests_cs_0 + io_write_requests_cs_1 + io_write_requests_cs_2 + io_write_requests_cs_3) * 32 / (duration_time * 1e6)",
>> +    "MetricConstraint": "NO_GROUP_EVENTS",
>> +    "BriefDescription": "Minimum inbound I/O memory access bandwidth (lower bound, assuming 32B per request. Actual inbound I/O requests may be 32B or 64B)",
>> +    "MetricGroup": "DF_Memory_BW",
>> +    "ScaleUnit": "1MB/s"
>> +  }
>> +]
>> diff --git a/tools/perf/pmu-events/arch/x86/mapfile.csv b/tools/perf/pmu-events/arch/x86/mapfile.csv
>> index 50a403b429b1..ba17117245d1 100644
>> --- a/tools/perf/pmu-events/arch/x86/mapfile.csv
>> +++ b/tools/perf/pmu-events/arch/x86/mapfile.csv
>> @@ -45,3 +45,6 @@ AuthenticAMD-25-([245][[:xdigit:]]|[[:xdigit:]]),v1,amdzen3,core
>>   AuthenticAMD-25-[[:xdigit:]]+,v1,amdzen4,core
>>   AuthenticAMD-26-([12467][[:xdigit:]]|[[:xdigit:]]),v1,amdzen5,core
>>   AuthenticAMD-26-[[:xdigit:]]+,v1,amdzen6,core
>> +HygonGenuine-24-[0123],v1,hygonm1,core
>> +HygonGenuine-24-[45],v1,hygonm4,core
>> +HygonGenuine-24-(1[012345678]|[6789ABCDEF]),v1,hygonm6,core
>> diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
>> index 376dc2d24162..63ae3a763a4f 100755
>> --- a/tools/perf/pmu-events/jevents.py
>> +++ b/tools/perf/pmu-events/jevents.py
>> @@ -294,6 +294,7 @@ class JsonEvent:
>>             'L3PMC': 'amd_l3',
>>             'DFPMC': 'amd_df',
>>             'UMCPMC': 'amd_umc',
>> +          'HYGON_DF': 'hygon_df',
>>             'cpu_core': 'cpu_core',
>>             'cpu_atom': 'cpu_atom',
>>             'ali_drw': 'ali_drw',
>> @@ -390,6 +391,7 @@ class JsonEvent:
>>           ('Invert', 'inv='),
>>           ('SampleAfterValue', 'period='),
>>           ('UMask', 'umask='),
>> +        ('ConstId', 'constid='),
> 
> Is Const a shortening of Constant? It seems a little redundant in the
> format name. Would CsId be more intention revealing? I don't know what
> CS means, but this at least looks a little more intuitive to me than
> Constant :-)
> 
Thank you for the suggestion. ConstId stands for Component Select ID. It 
identifies the selected Data Fabric component instance, and I agree that the 
current name is not particularly intuitive. I will rename it to CompId 
(Component ID) in the next revision.

Thanks,
Qi> Thanks,
> Ian
> 
>>           ('NodeType', 'type='),
>>           ('RdWrMask', 'rdwrmask='),
>>           ('EnAllCores', 'enallcores='),
>> --
>> 2.34.1
>>
>>
>>
>