tools/perf/pmu-events/arch/test/test_soc/sys/uncore.json

[
  {
           "BriefDescription": "ddr write-cycles event",
           "EventCode": "0x2b",
           "EventName": "sys_ddr_pmu.write_cycles",
           "Unit": "sys_ddr_pmu",
           "Compat": "v8"
   },
]