Re: [PATCH v6 6/7] perf jevents: Add support for Arm CMN PMU aliasing

From: Ian Rogers
Date: Mon Aug 14 2023 - 18:37:03 EST

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On Mon, Aug 7, 2023 at 12:51 AM Jing Zhang <renyu.zj@xxxxxxxxxxxxxxxxx> wrote:
>
> Currently just add aliases for part of Arm CMN PMU events which
> are general and compatible for any SoC and CMN-ANY.
>
> "Compat" value "434*;436*;43c*;43a*" means it is compatible with
> all CMN600/CMN650/CMN700/Ci700, which can be obtained from
> commit 7819e05a0dce ("perf/arm-cmn: Revamp model detection").
>
> The arm-cmn PMU events got from:

nit: The use of the words "events" and "aliases" can be confusing -
aliases isn't specific as there may be a notion of other aliases like
for PMU names. I think in the code base we should avoid to use
"aliases" and just use "events".

Thanks,
Ian

> [0] https://developer.arm.com/documentation/100180/0302/?lang=en
> [1] https://developer.arm.com/documentation/101408/0100/?lang=en
> [2] https://developer.arm.com/documentation/102308/0302/?lang=en
> [3] https://developer.arm.com/documentation/101569/0300/?lang=en
>
> Signed-off-by: Jing Zhang <renyu.zj@xxxxxxxxxxxxxxxxx>
> Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>
> ---
> .../pmu-events/arch/arm64/arm/cmn/sys/cmn.json | 266 +++++++++++++++++++++
> tools/perf/pmu-events/jevents.py | 1 +
> 2 files changed, 267 insertions(+)
> create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json
>
> diff --git a/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json
> new file mode 100644
> index 0000000..e54036c
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json
> @@ -0,0 +1,266 @@
> +[
> + {
> + "EventName": "hnf_cache_miss",
> + "EventIdCode": "0x1",
> + "Type": "0x5",
> + "BriefDescription": "Counts total cache misses in first lookup result (high priority).",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_slc_sf_cache_access",
> + "EventIdCode": "0x2",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of cache accesses in first access (high priority).",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_cache_fill",
> + "EventIdCode": "0x3",
> + "Type": "0x5",
> + "BriefDescription": "Counts total allocations in HN SLC (all cache line allocations to SLC).",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_pocq_retry",
> + "EventIdCode": "0x4",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of retried requests.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_pocq_reqs_recvd",
> + "EventIdCode": "0x5",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of requests that HN receives.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_sf_hit",
> + "EventIdCode": "0x6",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of SF hits.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_sf_evictions",
> + "EventIdCode": "0x7",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of SF eviction cache invalidations initiated.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_dir_snoops_sent",
> + "EventIdCode": "0x8",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of directed snoops sent (not including SF back invalidation).",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_brd_snoops_sent",
> + "EventIdCode": "0x9",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of multicast snoops sent (not including SF back invalidation).",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_slc_eviction",
> + "EventIdCode": "0xa",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of SLC evictions (dirty only).",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_slc_fill_invalid_way",
> + "EventIdCode": "0xb",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of SLC fills to an invalid way.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_mc_retries",
> + "EventIdCode": "0xc",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of retried transactions by the MC.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_mc_reqs",
> + "EventIdCode": "0xd",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of requests that are sent to MC.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hnf_qos_hh_retry",
> + "EventIdCode": "0xe",
> + "Type": "0x5",
> + "BriefDescription": "Counts number of times a HighHigh priority request is protocolretried at the HN‑F.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_s0_rdata_beats",
> + "EventIdCode": "0x1",
> + "Type": "0xa",
> + "BriefDescription": "Number of RData beats (RVALID and RREADY) dispatched on port 0. This event measures the read bandwidth, including CMO responses.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_s1_rdata_beats",
> + "EventIdCode": "0x2",
> + "Type": "0xa",
> + "BriefDescription": "Number of RData beats (RVALID and RREADY) dispatched on port 1. This event measures the read bandwidth, including CMO responses.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_s2_rdata_beats",
> + "EventIdCode": "0x3",
> + "Type": "0xa",
> + "BriefDescription": "Number of RData beats (RVALID and RREADY) dispatched on port 2. This event measures the read bandwidth, including CMO responses.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_rxdat_flits",
> + "EventIdCode": "0x4",
> + "Type": "0xa",
> + "BriefDescription": "Number of RXDAT flits received. This event measures the true read data bandwidth, excluding CMOs.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_txdat_flits",
> + "EventIdCode": "0x5",
> + "Type": "0xa",
> + "BriefDescription": "Number of TXDAT flits dispatched. This event measures the write bandwidth.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_txreq_flits_total",
> + "EventIdCode": "0x6",
> + "Type": "0xa",
> + "BriefDescription": "Number of TXREQ flits dispatched. This event measures the total request bandwidth.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "rnid_txreq_flits_retried",
> + "EventIdCode": "0x7",
> + "Type": "0xa",
> + "BriefDescription": "Number of retried TXREQ flits dispatched. This event measures the retry rate.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "sbsx_txrsp_retryack",
> + "EventIdCode": "0x4",
> + "Type": "0x7",
> + "BriefDescription": "Number of RXREQ flits dispatched. This event is a measure of the retry rate.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "sbsx_txdat_flitv",
> + "EventIdCode": "0x5",
> + "Type": "0x7",
> + "BriefDescription": "Number of TXDAT flits dispatched from XP to SBSX. This event is a measure of the write bandwidth.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "sbsx_arvalid_no_arready",
> + "EventIdCode": "0x21",
> + "Type": "0x7",
> + "BriefDescription": "Number of cycles the SBSX bridge is stalled because of backpressure on AR channel.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "sbsx_awvalid_no_awready",
> + "EventIdCode": "0x22",
> + "Type": "0x7",
> + "BriefDescription": "Number of cycles the SBSX bridge is stalled because of backpressure on AW channel.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "sbsx_wvalid_no_wready",
> + "EventIdCode": "0x23",
> + "Type": "0x7",
> + "BriefDescription": "Number of cycles the SBSX bridge is stalled because of backpressure on W channel.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_txrsp_retryack",
> + "EventIdCode": "0x2a",
> + "Type": "0x4",
> + "BriefDescription": "Number of RXREQ flits dispatched. This event is a measure of the retry rate.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_arvalid_no_arready",
> + "EventIdCode": "0x2b",
> + "Type": "0x4",
> + "BriefDescription": "Number of cycles the HN-I bridge is stalled because of backpressure on AR channel.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_arready_no_arvalid",
> + "EventIdCode": "0x2c",
> + "Type": "0x4",
> + "BriefDescription": "Number of cycles the AR channel is waiting for new requests from HN-I bridge.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_awvalid_no_awready",
> + "EventIdCode": "0x2d",
> + "Type": "0x4",
> + "BriefDescription": "Number of cycles the HN-I bridge is stalled because of backpressure on AW channel.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_awready_no_awvalid",
> + "EventIdCode": "0x2e",
> + "Type": "0x4",
> + "BriefDescription": "Number of cycles the AW channel is waiting for new requests from HN-I bridge.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_wvalid_no_wready",
> + "EventIdCode": "0x2f",
> + "Type": "0x4",
> + "BriefDescription": "Number of cycles the HN-I bridge is stalled because of backpressure on W channel.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + },
> + {
> + "EventName": "hni_txdat_stall",
> + "EventIdCode": "0x30",
> + "Type": "0x4",
> + "BriefDescription": "TXDAT valid but no link credit available.",
> + "Unit": "arm_cmn",
> + "Compat": "434*;436*;43c*;43a*"
> + }
> +]
> diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
> index 9c0f63a..bfdfb67 100755
> --- a/tools/perf/pmu-events/jevents.py
> +++ b/tools/perf/pmu-events/jevents.py
> @@ -272,6 +272,7 @@ 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()}'
>
> --
> 1.8.3.1
>

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