Re: [PATCH v4 2/2] perf vendor events hygon: Add Hygon Data Fabric PMU events and metrics
From: Qi Liu
Date: Mon Aug 17 2026 - 23:12:51 EST
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 <liuqi@xxxxxxxx> wrote: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.
Add perf JSON event definitions and metrics for the Hygon Data Fabric (DF)
uncore PMU.
Signed-off-by: Qi Liu <liuqi@xxxxxxxx>
---
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.
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.>
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.+ "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 :-)
Thanks,
Qi> Thanks,
Ian
('NodeType', 'type='),
('RdWrMask', 'rdwrmask='),
('EnAllCores', 'enallcores='),
--
2.34.1