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Message-ID: <CAP-5=fX1NQzus3MQapmBrdgEhDG4+XmawgytfugHHOKD0E-COg@mail.gmail.com>
Date: Wed, 19 Jul 2023 09:12:42 -0700
From: Ian Rogers <irogers@...gle.com>
To: Sandipan Das <sandipan.das@....com>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
x86@...nel.org, peterz@...radead.org, mingo@...hat.com,
acme@...nel.org, mark.rutland@....com,
alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
namhyung@...nel.org, adrian.hunter@...el.com, tglx@...utronix.de,
bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
eranian@...gle.com, ananth.narayan@....com, ravi.bangoria@....com,
santosh.shukla@....com
Subject: Re: [PATCH 6/6] perf vendor events amd: Add Zen 4 memory controller events
On Tue, Jul 18, 2023 at 11:58 PM Sandipan Das <sandipan.das@....com> wrote:
>
> Make the jevents parser aware of the Unified Memory Controller (UMC) PMU
> and add events taken from Section 8.2.1 "UMC Performance Monitor Events"
> of the Processor Programming Reference (PPR) for AMD Family 19h Model 11h
> processors. The events capture UMC command activity such as CAS, ACTIVATE,
> PRECHARGE etc. while the metrics derive data bus utilization and memory
> bandwidth out of these events.
>
> Signed-off-by: Sandipan Das <sandipan.das@....com>
Acked-by: Ian Rogers <irogers@...gle.com>
> ---
> .../arch/x86/amdzen4/memory-controller.json | 101 ++++++++++++++++++
> .../arch/x86/amdzen4/recommended.json | 84 +++++++++++++++
> tools/perf/pmu-events/jevents.py | 2 +
> 3 files changed, 187 insertions(+)
> create mode 100644 tools/perf/pmu-events/arch/x86/amdzen4/memory-controller.json
>
> diff --git a/tools/perf/pmu-events/arch/x86/amdzen4/memory-controller.json b/tools/perf/pmu-events/arch/x86/amdzen4/memory-controller.json
> new file mode 100644
> index 000000000000..55263e5e4f69
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/x86/amdzen4/memory-controller.json
> @@ -0,0 +1,101 @@
> +[
> + {
> + "EventName": "umc_mem_clk",
> + "PublicDescription": "Number of memory clock cycles.",
> + "EventCode": "0x00",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
nit: Why use UMCPMC and then rewrite to amd_umc, why not just use "amd_umc" ?
Thanks,
Ian
> + },
> + {
> + "EventName": "umc_act_cmd.all",
> + "PublicDescription": "Number of ACTIVATE commands sent.",
> + "EventCode": "0x05",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_act_cmd.rd",
> + "PublicDescription": "Number of ACTIVATE commands sent for reads.",
> + "EventCode": "0x05",
> + "RdWrMask": "0x1",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_act_cmd.wr",
> + "PublicDescription": "Number of ACTIVATE commands sent for writes.",
> + "EventCode": "0x05",
> + "RdWrMask": "0x2",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_pchg_cmd.all",
> + "PublicDescription": "Number of PRECHARGE commands sent.",
> + "EventCode": "0x06",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_pchg_cmd.rd",
> + "PublicDescription": "Number of PRECHARGE commands sent for reads.",
> + "EventCode": "0x06",
> + "RdWrMask": "0x1",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_pchg_cmd.wr",
> + "PublicDescription": "Number of PRECHARGE commands sent for writes.",
> + "EventCode": "0x06",
> + "RdWrMask": "0x2",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_cas_cmd.all",
> + "PublicDescription": "Number of CAS commands sent.",
> + "EventCode": "0x0a",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_cas_cmd.rd",
> + "PublicDescription": "Number of CAS commands sent for reads.",
> + "EventCode": "0x0a",
> + "RdWrMask": "0x1",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_cas_cmd.wr",
> + "PublicDescription": "Number of CAS commands sent for writes.",
> + "EventCode": "0x0a",
> + "RdWrMask": "0x2",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_data_slot_clks.all",
> + "PublicDescription": "Number of clocks used by the data bus.",
> + "EventCode": "0x14",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_data_slot_clks.rd",
> + "PublicDescription": "Number of clocks used by the data bus for reads.",
> + "EventCode": "0x14",
> + "RdWrMask": "0x1",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + },
> + {
> + "EventName": "umc_data_slot_clks.wr",
> + "PublicDescription": "Number of clocks used by the data bus for writes.",
> + "EventCode": "0x14",
> + "RdWrMask": "0x2",
> + "PerPkg": "1",
> + "Unit": "UMCPMC"
> + }
> +]
> diff --git a/tools/perf/pmu-events/arch/x86/amdzen4/recommended.json b/tools/perf/pmu-events/arch/x86/amdzen4/recommended.json
> index 5e6a793acf7b..96e06401c6cb 100644
> --- a/tools/perf/pmu-events/arch/x86/amdzen4/recommended.json
> +++ b/tools/perf/pmu-events/arch/x86/amdzen4/recommended.json
> @@ -330,5 +330,89 @@
> "MetricGroup": "data_fabric",
> "PerPkg": "1",
> "ScaleUnit": "6.103515625e-5MiB"
> + },
> + {
> + "MetricName": "umc_data_bus_utilization",
> + "BriefDescription": "Memory controller data bus utilization.",
> + "MetricExpr": "d_ratio(umc_data_slot_clks.all / 2, umc_mem_clk)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "100%"
> + },
> + {
> + "MetricName": "umc_cas_cmd_rate",
> + "BriefDescription": "Memory controller CAS command rate.",
> + "MetricExpr": "d_ratio(umc_cas_cmd.all * 1000, umc_mem_clk)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1"
> + },
> + {
> + "MetricName": "umc_cas_cmd_read_ratio",
> + "BriefDescription": "Ratio of memory controller CAS commands for reads.",
> + "MetricExpr": "d_ratio(umc_cas_cmd.rd, umc_cas_cmd.all)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "100%"
> + },
> + {
> + "MetricName": "umc_cas_cmd_write_ratio",
> + "BriefDescription": "Ratio of memory controller CAS commands for writes.",
> + "MetricExpr": "d_ratio(umc_cas_cmd.wr, umc_cas_cmd.all)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "100%"
> + },
> + {
> + "MetricName": "umc_mem_read_bandwidth",
> + "BriefDescription": "Estimated memory read bandwidth.",
> + "MetricExpr": "(umc_cas_cmd.rd * 64) / 1e6 / duration_time",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "1MB/s"
> + },
> + {
> + "MetricName": "umc_mem_write_bandwidth",
> + "BriefDescription": "Estimated memory write bandwidth.",
> + "MetricExpr": "(umc_cas_cmd.wr * 64) / 1e6 / duration_time",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "1MB/s"
> + },
> + {
> + "MetricName": "umc_mem_bandwidth",
> + "BriefDescription": "Estimated combined memory bandwidth.",
> + "MetricExpr": "(umc_cas_cmd.all * 64) / 1e6 / duration_time",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "1MB/s"
> + },
> + {
> + "MetricName": "umc_cas_cmd_read_ratio",
> + "BriefDescription": "Ratio of memory controller CAS commands for reads.",
> + "MetricExpr": "d_ratio(umc_cas_cmd.rd, umc_cas_cmd.all)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1",
> + "ScaleUnit": "100%"
> + },
> + {
> + "MetricName": "umc_cas_cmd_rate",
> + "BriefDescription": "Memory controller CAS command rate.",
> + "MetricExpr": "d_ratio(umc_cas_cmd.all * 1000, umc_mem_clk)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1"
> + },
> + {
> + "MetricName": "umc_activate_cmd_rate",
> + "BriefDescription": "Memory controller ACTIVATE command rate.",
> + "MetricExpr": "d_ratio(umc_act_cmd.all * 1000, umc_mem_clk)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1"
> + },
> + {
> + "MetricName": "umc_precharge_cmd_rate",
> + "BriefDescription": "Memory controller PRECHARGE command rate.",
> + "MetricExpr": "d_ratio(umc_pchg_cmd.all * 1000, umc_mem_clk)",
> + "MetricGroup": "memory_controller",
> + "PerPkg": "1"
> }
> ]
> diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
> index 12e80bb7939b..c2a5728253db 100755
> --- a/tools/perf/pmu-events/jevents.py
> +++ b/tools/perf/pmu-events/jevents.py
> @@ -272,6 +272,7 @@ class JsonEvent:
> 'imx8_ddr': 'imx8_ddr',
> 'L3PMC': 'amd_l3',
> 'DFPMC': 'amd_df',
> + 'UMCPMC': 'amd_umc',
> 'cpu_core': 'cpu_core',
> 'cpu_atom': 'cpu_atom',
> }
> @@ -330,6 +331,7 @@ class JsonEvent:
> ('Invert', 'inv='),
> ('SampleAfterValue', 'period='),
> ('UMask', 'umask='),
> + ('RdWrMask', 'rdwrmask='),
> ]
> for key, value in event_fields:
> if key in jd and jd[key] != '0':
> --
> 2.34.1
>
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