Re: [PATCH v7 7/8] perf jevents: Add support for Arm CMN PMU aliasing

[Jing Zhang <renyu.zj@linux.alibaba.com>]

在 2023/8/23 下午5:33, Robin Murphy 写道:
> On 2023-08-21 09:36, Jing Zhang 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:
>> [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@linux.alibaba.com>
>> Reviewed-by: John Garry <john.g.garry@oracle.com>
>> ---
>>   .../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..30435a3
>> --- /dev/null
>> +++ b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json
>> @@ -0,0 +1,266 @@
>> +[
>> +    {
>> +        "EventName": "hnf_cache_miss",
>> +        "EventIdCode": "0x1",
>> +        "NodeType": "0x5",
> 
> Given my other comment, I also think there would be no harm in just having these as:
>     
>         "ConfigCode" : "0x10005"
> 
> if you'd rather make life easier to begin with, then be able to come back and improve things later. IMO it doesn't affect the readability of the important values *all* that much, since it's not like they're tighly packed together in oddly-aligned bitfields.
> 

Thanks a lot! that's a great suggestion.  I hope to merge it in v6.6 first in the current way,
and then I will improve it in CMN driver and perf tools later.

Thanks,
Jing


> Thanks,
> Robin.
> 
>> +        "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "0x5",
>> +        "BriefDescription": "Counts number of retried requests.",
>> +        "Unit": "arm_cmn",
>> +        "Compat": "434*;436*;43c*;43a*"
>> +    },
>> +    {
>> +        "EventName": "hnf_pocq_reqs_recvd",
>> +        "EventIdCode": "0x5",
>> +        "NodeType": "0x5",
>> +        "BriefDescription": "Counts number of requests that HN receives.",
>> +        "Unit": "arm_cmn",
>> +        "Compat": "434*;436*;43c*;43a*"
>> +    },
>> +    {
>> +        "EventName": "hnf_sf_hit",
>> +        "EventIdCode": "0x6",
>> +        "NodeType": "0x5",
>> +        "BriefDescription": "Counts number of SF hits.",
>> +        "Unit": "arm_cmn",
>> +        "Compat": "434*;436*;43c*;43a*"
>> +    },
>> +    {
>> +        "EventName": "hnf_sf_evictions",
>> +        "EventIdCode": "0x7",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "0x5",
>> +        "BriefDescription": "Counts number of retried transactions by the MC.",
>> +        "Unit": "arm_cmn",
>> +        "Compat": "434*;436*;43c*;43a*"
>> +    },
>> +    {
>> +        "EventName": "hnf_mc_reqs",
>> +        "EventIdCode": "0xd",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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",
>> +        "NodeType": "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 369c8bf..935bd4b 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()}'
>>