MI300 Stochastic PC Sampling Documentation and Changelog (#336)
* MI300 Stochastic PC Sampling Documentation
* Stochastic PC sampling title renaming
---------
Co-authored-by: Welton, Benjamin <Benjamin.Welton@amd.com>
[ROCm/rocprofiler-sdk commit: 96a0ef244f]
Этот коммит содержится в:
Indic, Vladimir
коммит произвёл
GitHub
GitHub
родитель
50bc3ed803
Коммит
3dc4148c46
@@ -172,9 +172,11 @@ Full documentation for ROCprofiler-SDK is available at [rocm.docs.amd.com/projec
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- Added perfetto support for counter collection.
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- Added support for negating rocprofv3 tracing options when using aggregate options, e.g. `--sys-trace --hsa-trace=no`
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- Added `--agent-index` option in rocprofv3 to specify the agent naming convention in the output
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- absolute == node_id
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- relative == logical_node_id
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- type-relative == logical_node_type_id
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- absolute == node_id
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- relative == logical_node_id
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- type-relative == logical_node_type_id
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- Added MI300 stochastic (hardware-based) PC sampling support in ROCProfiler-SDK and ROCProfV3
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### Changed
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@@ -0,0 +1,98 @@
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"Sample_Timestamp","Exec_Mask","Dispatch_Id","Instruction","Instruction_Comment","Correlation_Id","Wave_Issued_Instruction","Instruction_Type","Stall_Reason","Wave_Count"
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
||||
390706113352487,18446744073709551615,86,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:99",86,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706113369607,18446744073709551615,87,"s_waitcnt vmcnt(1)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",87,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706113373647,18446744073709551615,87,"s_waitcnt vmcnt(1)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",87,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706113387017,18446744073709551615,88,"s_waitcnt lgkmcnt(0)","/usr/include/hip/amd_detail/amd_hip_runtime.h:275",88,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",1
|
||||
390706113390207,18446744073709551615,88,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",88,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706113408977,18446744073709551615,89,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",89,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706113409057,18446744073709551615,89,"v_add_f32_e32 v2, v2, v3","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",89,1,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_VALU","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_OTHER_WAIT",10
|
||||
390706113411607,18446744073709551615,89,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",89,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",9
|
||||
390706113411737,18446744073709551615,89,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",89,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",7
|
||||
390706113412777,18446744073709551615,89,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",89,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",7
|
||||
390706113415847,18446744073709551615,89,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",89,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",9
|
||||
390706113424217,18446744073709551615,90,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:99",90,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",4
|
||||
390706113443127,18446744073709551615,91,"v_add_f32_e32 v2, -1.0, v2","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",91,1,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_VALU","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_OTHER_WAIT",2
|
||||
390706113444857,18446744073709551615,91,"v_add_f32_e32 v3, -1.0, v3","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",91,1,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_VALU","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_OTHER_WAIT",3
|
||||
390706113459367,18446744073709551615,92,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",92,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706113459767,18446744073709551615,92,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",92,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706113462927,18446744073709551615,92,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",92,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",4
|
||||
390706113480097,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",15
|
||||
390706113484087,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",7
|
||||
390706113496167,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706113500167,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",9
|
||||
390706113506057,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",14
|
||||
390706113506327,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706113508577,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",17
|
||||
390706113522058,18446744073709551615,93,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",93,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",15
|
||||
390706113561378,18446744073709551615,94,"s_waitcnt lgkmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:97",94,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",3
|
||||
390706113573138,18446744073709551615,95,"s_waitcnt vmcnt(1)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",95,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706526501642,18446744073709551615,112,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",112,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706526582893,18446744073709551615,117,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:82",117,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",8
|
||||
390706526594683,18446744073709551615,118,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:99",118,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",4
|
||||
390706526629813,18446744073709551615,120,"s_waitcnt lgkmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:131",120,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706526629803,18446744073709551615,120,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",120,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706526633683,18446744073709551615,120,"v_mul_f32_e32 v7, v3, v6","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",120,1,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_VALU","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_OTHER_WAIT",4
|
||||
390706526634933,18446744073709551615,120,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",120,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",4
|
||||
390706526665053,18446744073709551615,122,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:99",122,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",4
|
||||
390706526677283,18446744073709551615,123,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",123,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",6
|
||||
390706526695733,18446744073709551615,124,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:133",124,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706526809694,18446744073709551615,126,"v_and_b32_e32 v2, 0x7fffffff, v2","/opt/rocm-6.5.0/lib/llvm/lib/clang/19/include/__clang_hip_math.h:427",126,1,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_VALU","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_OTHER_WAIT",5
|
||||
390706526810014,18446744073709551615,126,"s_waitcnt vmcnt(0)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:99",126,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
390706526821284,18446744073709551615,127,"s_waitcnt vmcnt(1)","/home/vlaindic/git/rocprofiler-sdk-internal/tests/bin/vector-operations/vector-ops.cpp:116",127,0,"ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_NO_INST","ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_WAITCNT",5
|
||||
|
@@ -180,3 +180,128 @@ The preceding command generates a JSON file with the comprehensive output. Here
|
||||
}
|
||||
|
||||
For description of the fields in the JSON output, see :ref:`output-file-fields`.
|
||||
|
||||
|
||||
Hardware-Based (Stochastic) PC Sampling Method
|
||||
===============================================
|
||||
|
||||
The new ``ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC`` has been introduced for gfx942 architecture.
|
||||
It employes a specific hardware for probing waves actively running on GPU.
|
||||
Beside information already provided with ``ROCPROFILER_PC_SAMPLING_METHOD_HOST_TRAP`` useful for determining hot-spots within the kernel,
|
||||
it delivers additional information that tells whether a sampled wave issued an instruction represented with particular PC.
|
||||
If not, it tells what is the reason for not issuing the instruction (stall reason).
|
||||
This type of information is particularly useful for understanding stalls during the kernel execution.
|
||||
|
||||
To use this method on gfx942, we recommend listing available PC sampling configurations to verify if the latest ROCm stack is installed
|
||||
on the system by running:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
rocprofv3 -L
|
||||
|
||||
Outputi similar to the following indicates that the ``ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC`` method is available:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
Method: ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC
|
||||
Unit: ROCPROFILER_PC_SAMPLING_UNIT_CYCLES
|
||||
Minimum_Interval: 256
|
||||
Maximum_Interval: 2147483648
|
||||
|
||||
Please note that on gfx942, ``ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC`` requires intervals to be specified in cycles whose value are power of 2.
|
||||
|
||||
To profile a gfx942 accelarated application with ``ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC`` PC sampling, one can use the following command:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
rocprofv3 --pc-sampling-beta-enabled --pc-sampling-method stochastic --pc-sampling-unit cycles --pc-sampling-interval 1048576 --output-format csv, json -- <application_path>
|
||||
|
||||
The previous command serializes samples in both CSV and JSON output formats in the ``pc_sampling_stochastic.csv`` and ``out_results.json`` files, respectively.
|
||||
|
||||
Comparing the ``pc_sampling_stochastic.csv`` to ``pc_sampling_host_trap`` from previous section, one can notice that the ``ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC`` method
|
||||
generates additional fields:
|
||||
- ``Wave_Issued_Instruction``: Indicates whether the wave issued an instruction (value 1) represented with particular PC or not (value 0)
|
||||
- ``Instruction_Type``: If the value of ``Wave_Issued_Instruction`` is 1, this fields indicates the type of the issued instruction. Otherwise, this fields irrelevant.
|
||||
- ``Stall_Reason``: If the value of ``Wave_Issued_Instruction`` is 0, this fields indicates the reason for not issuing the instruction (stall reason). Otherwise, this field is irrelevant.
|
||||
- ``Wave_Count``: Total number of waves actively running on a compute unit when the sample was generated.
|
||||
|
||||
.. csv-table:: PC sampling stochastic with debug symbols
|
||||
:file: /data/pc_sampling_stochastic_debug.csv
|
||||
:widths: 20,10,10,10,10,20,10,20,20,10
|
||||
:header-rows: 1
|
||||
|
||||
Similarly, ``ROCPROFILER_PC_SAMPLING_METHOD_STOCHASTIC`` method delievers additional information to every sample in the JSON output.
|
||||
The following snippet shows one sample from ``out_results.json`` file.
|
||||
|
||||
.. code-block:: text
|
||||
|
||||
{
|
||||
"record": {
|
||||
"flags": {
|
||||
"has_mem_cnt": 0
|
||||
},
|
||||
"hw_id": {
|
||||
"chiplet": 4,
|
||||
"wave_id": 0,
|
||||
"simd_id": 2,
|
||||
"pipe_id": 3,
|
||||
"cu_or_wgp_id": 1,
|
||||
"shader_array_id": 0,
|
||||
"shader_engine_id": 3,
|
||||
"workgroup_id": 0,
|
||||
"vm_id": 3,
|
||||
"queue_id": 2,
|
||||
"microengine_id": 1
|
||||
},
|
||||
"pc": {
|
||||
"code_object_id": 2,
|
||||
"code_object_offset": 13880
|
||||
},
|
||||
"exec_mask": 18446744073709551615,
|
||||
"timestamp": 390705261924637,
|
||||
"dispatch_id": 29,
|
||||
"corr_id": {
|
||||
"internal": 29,
|
||||
"external": 0
|
||||
},
|
||||
"wrkgrp_id": {
|
||||
"x": 9,
|
||||
"y": 489,
|
||||
"z": 0
|
||||
},
|
||||
"wave_in_grp": 0,
|
||||
"wave_issued": 1,
|
||||
"inst_type": "ROCPROFILER_PC_SAMPLING_INSTRUCTION_TYPE_VALU",
|
||||
"wave_cnt": 6,
|
||||
"snapshot": {
|
||||
"stall_reason": "ROCPROFILER_PC_SAMPLING_INSTRUCTION_NOT_ISSUED_REASON_OTHER_WAIT",
|
||||
"dual_issue_valu": 0,
|
||||
"arb_state_issue_valu": 1,
|
||||
"arb_state_issue_matrix": 0,
|
||||
"arb_state_issue_lds": 0,
|
||||
"arb_state_issue_lds_direct": 0,
|
||||
"arb_state_issue_scalar": 0,
|
||||
"arb_state_issue_vmem_tex": 0,
|
||||
"arb_state_issue_flat": 0,
|
||||
"arb_state_issue_exp": 0,
|
||||
"arb_state_issue_misc": 0,
|
||||
"arb_state_issue_brmsg": 0,
|
||||
"arb_state_stall_valu": 0,
|
||||
"arb_state_stall_matrix": 0,
|
||||
"arb_state_stall_lds": 0,
|
||||
"arb_state_stall_lds_direct": 0,
|
||||
"arb_state_stall_scalar": 0,
|
||||
"arb_state_stall_vmem_tex": 0,
|
||||
"arb_state_stall_flat": 0,
|
||||
"arb_state_stall_exp": 0,
|
||||
"arb_state_stall_misc": 0,
|
||||
"arb_state_stall_brmsg": 0
|
||||
}
|
||||
},
|
||||
"inst_index": 1
|
||||
},
|
||||
|
||||
Fields starting with ``arb_state_`` are of particular interest as they indicate the state of the arbiter at the time of sampling.
|
||||
Namely, ``arb_state_issue_`` fields indicate what type of instructions arbiter issued at the time of sampling.
|
||||
On the other hand, ``arb_state_stall_`` fields indicate what type of instructions were stalled at the time of sampling.
|
||||
This information is useful for understanding how many instructions per cycle (IPC) are issued.
|
||||
|
||||
Ссылка в новой задаче
Block a user