MI300 and MI200 series performance counters and metrics

2024-11-07

52 min read time

Applies to Linux and Windows

This document lists and describes the hardware performance counters and derived metrics available for the AMD Instinct™ MI300 and MI200 GPU. You can also access this information using the ROCProfiler tool.

MI300 and MI200 series performance counters

Series performance counters include the following categories:

• Command processor counters

• Graphics register bus manager counters

• Shader processor input counters

• Compute unit counters

• L1 instruction cache (L1i) and scalar L1 data cache (L1d) counters

• Vector L1 cache subsystem counters

• L2 cache access counters

The following sections provide additional details for each category.

Note

Preliminary validation of all MI300 and MI200 series performance counters is in progress. Those with an asterisk (*) require further evaluation.

Command processor counters

Command processor counters are further classified into command processor-fetcher and command processor-compute.

Command processor-fetcher counters

Hardware counter	Unit	Definition
CPF_CMP_UTCL1_STALL_ON_TRANSLATION	Cycles	Number of cycles one of the compute unified translation caches (L1) is stalled waiting on translation
CPF_CPF_STAT_BUSY	Cycles	Number of cycles command processor-fetcher is busy
CPF_CPF_STAT_IDLE	Cycles	Number of cycles command processor-fetcher is idle
CPF_CPF_STAT_STALL	Cycles	Number of cycles command processor-fetcher is stalled
CPF_CPF_TCIU_BUSY	Cycles	Number of cycles command processor-fetcher texture cache interface unit interface is busy
CPF_CPF_TCIU_IDLE	Cycles	Number of cycles command processor-fetcher texture cache interface unit interface is idle
CPF_CPF_TCIU_STALL	Cycles	Number of cycles command processor-fetcher texture cache interface unit interface is stalled waiting on free tags

The texture cache interface unit is the interface between the command processor and the memory system.

Command processor-compute counters

Hardware counter	Unit	Definition
CPC_ME1_BUSY_FOR_PACKET_DECODE	Cycles	Number of cycles command processor-compute micro engine is busy decoding packets
CPC_UTCL1_STALL_ON_TRANSLATION	Cycles	Number of cycles one of the unified translation caches (L1) is stalled waiting on translation
CPC_CPC_STAT_BUSY	Cycles	Number of cycles command processor-compute is busy
CPC_CPC_STAT_IDLE	Cycles	Number of cycles command processor-compute is idle
CPC_CPC_STAT_STALL	Cycles	Number of cycles command processor-compute is stalled
CPC_CPC_TCIU_BUSY	Cycles	Number of cycles command processor-compute texture cache interface unit interface is busy
CPC_CPC_TCIU_IDLE	Cycles	Number of cycles command processor-compute texture cache interface unit interface is idle
CPC_CPC_UTCL2IU_BUSY	Cycles	Number of cycles command processor-compute unified translation cache (L2) interface is busy
CPC_CPC_UTCL2IU_IDLE	Cycles	Number of cycles command processor-compute unified translation cache (L2) interface is idle
CPC_CPC_UTCL2IU_STALL	Cycles	Number of cycles command processor-compute unified translation cache (L2) interface is stalled
CPC_ME1_DC0_SPI_BUSY	Cycles	Number of cycles command processor-compute micro engine processor is busy

The micro engine runs packet-processing firmware on the command processor-compute counter.

Graphics register bus manager counters

Hardware counter	Unit	Definition
GRBM_COUNT	Cycles	Number of free-running GPU cycles
GRBM_GUI_ACTIVE	Cycles	Number of GPU active cycles
GRBM_CP_BUSY	Cycles	Number of cycles any of the command processor blocks are busy
GRBM_SPI_BUSY	Cycles	Number of cycles any of the shader processor input is busy in the shader engines
GRBM_TA_BUSY	Cycles	Number of cycles any of the texture addressing unit is busy in the shader engines
GRBM_TC_BUSY	Cycles	Number of cycles any of the texture cache blocks are busy
GRBM_CPC_BUSY	Cycles	Number of cycles the command processor-compute is busy
GRBM_CPF_BUSY	Cycles	Number of cycles the command processor-fetcher is busy
GRBM_UTCL2_BUSY	Cycles	Number of cycles the unified translation cache (Level 2 [L2]) block is busy
GRBM_EA_BUSY	Cycles	Number of cycles the efficiency arbiter block is busy

Texture cache blocks include:

• Texture cache arbiter

• Texture cache per pipe, also known as vector Level 1 (L1) cache

• Texture cache per channel, also known as known as L2 cache

• Texture cache interface

Shader processor input counters

Hardware counter	Unit	Definition
SPI_CSN_BUSY	Cycles	Number of cycles with outstanding waves
SPI_CSN_WINDOW_VALID	Cycles	Number of cycles enabled by perfcounter_start event
SPI_CSN_NUM_THREADGROUPS	Workgroups	Number of dispatched workgroups
SPI_CSN_WAVE	Wavefronts	Number of dispatched wavefronts
SPI_RA_REQ_NO_ALLOC	Cycles	Number of arbiter cycles with requests but no allocation
SPI_RA_REQ_NO_ALLOC_CSN	Cycles	Number of arbiter cycles with compute shader (nth pipe) requests but no compute shader (nth pipe) allocation
SPI_RA_RES_STALL_CSN	Cycles	Number of arbiter stall cycles due to shortage of compute shader (nth pipe) pipeline slots
SPI_RA_TMP_STALL_CSN	Cycles	Number of stall cycles due to shortage of temp space
SPI_RA_WAVE_SIMD_FULL_CSN	SIMD-cycles	Accumulated number of single instruction, multiple data (SIMD) per cycle affected by shortage of wave slots for compute shader (nth pipe) wave dispatch
SPI_RA_VGPR_SIMD_FULL_CSN	SIMD-cycles	Accumulated number of SIMDs per cycle affected by shortage of vector general-purpose register (VGPR) slots for compute shader (nth pipe) wave dispatch
SPI_RA_SGPR_SIMD_FULL_CSN	SIMD-cycles	Accumulated number of SIMDs per cycle affected by shortage of scalar general-purpose register (SGPR) slots for compute shader (nth pipe) wave dispatch
SPI_RA_LDS_CU_FULL_CSN	CU	Number of compute units affected by shortage of local data share (LDS) space for compute shader (nth pipe) wave dispatch
SPI_RA_BAR_CU_FULL_CSN	CU	Number of compute units with compute shader (nth pipe) waves waiting at a BARRIER
SPI_RA_BULKY_CU_FULL_CSN	CU	Number of compute units with compute shader (nth pipe) waves waiting for BULKY resource
SPI_RA_TGLIM_CU_FULL_CSN	Cycles	Number of compute shader (nth pipe) wave stall cycles due to restriction of tg_limit for thread group size
SPI_RA_WVLIM_STALL_CSN	Cycles	Number of cycles compute shader (nth pipe) is stalled due to WAVE_LIMIT
SPI_VWC_CSC_WR	Qcycles	Number of quad-cycles taken to initialize VGPRs when launching waves
SPI_SWC_CSC_WR	Qcycles	Number of quad-cycles taken to initialize SGPRs when launching waves

Compute unit counters

The compute unit counters are further classified into instruction mix, matrix fused multiply-add (FMA) operation counters, level counters, wavefront counters, wavefront cycle counters, and LDS counters.

Instruction mix

Hardware counter	Unit	Definition
SQ_INSTS	Instr	Number of instructions issued
SQ_INSTS_VALU	Instr	Number of vector arithmetic logic unit (VALU) instructions including matrix FMA issued
SQ_INSTS_VALU_ADD_F16	Instr	Number of VALU half-precision floating-point (F16) ADD or SUB instructions issued
SQ_INSTS_VALU_MUL_F16	Instr	Number of VALU F16 Multiply instructions issued
SQ_INSTS_VALU_FMA_F16	Instr	Number of VALU F16 FMA or multiply-add instructions issued
SQ_INSTS_VALU_TRANS_F16	Instr	Number of VALU F16 Transcendental instructions issued
SQ_INSTS_VALU_ADD_F32	Instr	Number of VALU full-precision floating-point (F32) ADD or SUB instructions issued
SQ_INSTS_VALU_MUL_F32	Instr	Number of VALU F32 Multiply instructions issued
SQ_INSTS_VALU_FMA_F32	Instr	Number of VALU F32 FMAor multiply-add instructions issued
SQ_INSTS_VALU_TRANS_F32	Instr	Number of VALU F32 Transcendental instructions issued
SQ_INSTS_VALU_ADD_F64	Instr	Number of VALU F64 ADD or SUB instructions issued
SQ_INSTS_VALU_MUL_F64	Instr	Number of VALU F64 Multiply instructions issued
SQ_INSTS_VALU_FMA_F64	Instr	Number of VALU F64 FMA or multiply-add instructions issued
SQ_INSTS_VALU_TRANS_F64	Instr	Number of VALU F64 Transcendental instructions issued
SQ_INSTS_VALU_INT32	Instr	Number of VALU 32-bit integer instructions (signed or unsigned) issued
SQ_INSTS_VALU_INT64	Instr	Number of VALU 64-bit integer instructions (signed or unsigned) issued
SQ_INSTS_VALU_CVT	Instr	Number of VALU Conversion instructions issued
SQ_INSTS_VALU_MFMA_I8	Instr	Number of 8-bit Integer matrix FMA instructions issued
SQ_INSTS_VALU_MFMA_F16	Instr	Number of F16 matrix FMA instructions issued
SQ_INSTS_VALU_MFMA_F32	Instr	Number of F32 matrix FMA instructions issued
SQ_INSTS_VALU_MFMA_F64	Instr	Number of F64 matrix FMA instructions issued
SQ_INSTS_MFMA	Instr	Number of matrix FMA instructions issued
SQ_INSTS_VMEM_WR	Instr	Number of vector memory write instructions (including flat) issued
SQ_INSTS_VMEM_RD	Instr	Number of vector memory read instructions (including flat) issued
SQ_INSTS_VMEM	Instr	Number of vector memory instructions issued, including both flat and buffer instructions
SQ_INSTS_SALU	Instr	Number of scalar arithmetic logic unit (SALU) instructions issued
SQ_INSTS_SMEM	Instr	Number of scalar memory instructions issued
SQ_INSTS_SMEM_NORM	Instr	Number of scalar memory instructions normalized to match smem_level issued
SQ_INSTS_FLAT	Instr	Number of flat instructions issued
SQ_INSTS_FLAT_LDS_ONLY	Instr	MI200 series only Number of FLAT instructions that read/write only from/to LDS issued. Works only if EARLY_TA_DONE is enabled.
SQ_INSTS_LDS	Instr	Number of LDS instructions issued (MI200: includes flat; MI300: does not include flat)
SQ_INSTS_GDS	Instr	Number of global data share instructions issued
SQ_INSTS_EXP_GDS	Instr	Number of EXP and global data share instructions excluding skipped export instructions issued
SQ_INSTS_BRANCH	Instr	Number of branch instructions issued
SQ_INSTS_SENDMSG	Instr	Number of SENDMSG instructions including s_endpgm issued
SQ_INSTS_VSKIPPED	Instr	Number of vector instructions skipped

Flat instructions allow read, write, and atomic access to a generic memory address pointer that can resolve to any of the following physical memories:

• Global Memory

• Scratch (“private”)

• LDS (“shared”)

• Invalid - MEM_VIOL TrapStatus

Matrix fused multiply-add operation counters

Hardware counter	Unit	Definition
SQ_INSTS_VALU_MFMA_MOPS_I8	IOP	Number of 8-bit integer matrix FMA ops in the unit of 512
SQ_INSTS_VALU_MFMA_MOPS_F16	FLOP	Number of F16 floating matrix FMA ops in the unit of 512
SQ_INSTS_VALU_MFMA_MOPS_BF16	FLOP	Number of BF16 floating matrix FMA ops in the unit of 512
SQ_INSTS_VALU_MFMA_MOPS_F32	FLOP	Number of F32 floating matrix FMA ops in the unit of 512
SQ_INSTS_VALU_MFMA_MOPS_F64	FLOP	Number of F64 floating matrix FMA ops in the unit of 512

Level counters

Note

All level counters must be followed by SQ_ACCUM_PREV_HIRES counter to measure average latency.

Hardware counter	Unit	Definition
SQ_ACCUM_PREV	Count	Accumulated counter sample value where accumulation takes place once every four cycles
SQ_ACCUM_PREV_HIRES	Count	Accumulated counter sample value where accumulation takes place once every cycle
SQ_LEVEL_WAVES	Waves	Number of inflight waves
SQ_INST_LEVEL_VMEM	Instr	Number of inflight vector memory (including flat) instructions
SQ_INST_LEVEL_SMEM	Instr	Number of inflight scalar memory instructions
SQ_INST_LEVEL_LDS	Instr	Number of inflight LDS (including flat) instructions
SQ_IFETCH_LEVEL	Instr	Number of inflight instruction fetch requests from the cache

Use the following formulae to calculate latencies:

• Vector memory latency = SQ_ACCUM_PREV_HIRES divided by SQ_INSTS_VMEM

• Wave latency = SQ_ACCUM_PREV_HIRES divided by SQ_WAVE

• LDS latency = SQ_ACCUM_PREV_HIRES divided by SQ_INSTS_LDS

• Scalar memory latency = SQ_ACCUM_PREV_HIRES divided by SQ_INSTS_SMEM_NORM

• Instruction fetch latency = SQ_ACCUM_PREV_HIRES divided by SQ_IFETCH

Wavefront counters

Hardware counter	Unit	Definition
SQ_WAVES	Waves	Number of wavefronts dispatched to sequencers, including both new and restored wavefronts
SQ_WAVES_SAVED	Waves	Number of context-saved waves
SQ_WAVES_RESTORED	Waves	Number of context-restored waves sent to sequencers
SQ_WAVES_EQ_64	Waves	Number of wavefronts with exactly 64 active threads sent to sequencers
SQ_WAVES_LT_64	Waves	Number of wavefronts with less than 64 active threads sent to sequencers
SQ_WAVES_LT_48	Waves	Number of wavefronts with less than 48 active threads sent to sequencers
SQ_WAVES_LT_32	Waves	Number of wavefronts with less than 32 active threads sent to sequencers
SQ_WAVES_LT_16	Waves	Number of wavefronts with less than 16 active threads sent to sequencers

Wavefront cycle counters

Hardware counter	Unit	Definition
SQ_CYCLES	Cycles	Clock cycles
SQ_BUSY_CYCLES	Cycles	Number of cycles while sequencers reports it to be busy
SQ_BUSY_CU_CYCLES	Qcycles	Number of quad-cycles each compute unit is busy
SQ_VALU_MFMA_BUSY_CYCLES	Cycles	Number of cycles the matrix FMA arithmetic logic unit (ALU) is busy
SQ_WAVE_CYCLES	Qcycles	Number of quad-cycles spent by waves in the compute units
SQ_WAIT_ANY	Qcycles	Number of quad-cycles spent waiting for anything
SQ_WAIT_INST_ANY	Qcycles	Number of quad-cycles spent waiting for any instruction to be issued
SQ_ACTIVE_INST_ANY	Qcycles	Number of quad-cycles spent by each wave to work on an instruction
SQ_ACTIVE_INST_VMEM	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on a vector memory instruction
SQ_ACTIVE_INST_LDS	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on an LDS instruction
SQ_ACTIVE_INST_VALU	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on a VALU instruction
SQ_ACTIVE_INST_SCA	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on a SALU or scalar memory instruction
SQ_ACTIVE_INST_EXP_GDS	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on an EXPORT or GDS instruction
SQ_ACTIVE_INST_MISC	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on a BRANCH or SENDMSG instruction
SQ_ACTIVE_INST_FLAT	Qcycles	Number of quad-cycles spent by the sequencer instruction arbiter to work on a flat instruction
SQ_INST_CYCLES_VMEM_WR	Qcycles	Number of quad-cycles spent to send addr and cmd data for vector memory write instructions
SQ_INST_CYCLES_VMEM_RD	Qcycles	Number of quad-cycles spent to send addr and cmd data for vector memory read instructions
SQ_INST_CYCLES_SMEM	Qcycles	Number of quad-cycles spent to execute scalar memory reads
SQ_INST_CYCLES_SALU	Qcycles	Number of quad-cycles spent to execute non-memory read scalar operations
SQ_THREAD_CYCLES_VALU	Qcycles	Number of quad-cycles spent to execute VALU operations on active threads
SQ_WAIT_INST_LDS	Qcycles	Number of quad-cycles spent waiting for LDS instruction to be issued

SQ_THREAD_CYCLES_VALU is similar to INST_CYCLES_VALU, but it’s multiplied by the number of active threads.

LDS counters

Hardware counter	Unit	Definition
SQ_LDS_ATOMIC_RETURN	Cycles	Number of atomic return cycles in LDS
SQ_LDS_BANK_CONFLICT	Cycles	Number of cycles LDS is stalled by bank conflicts
SQ_LDS_ADDR_CONFLICT	Cycles	Number of cycles LDS is stalled by address conflicts
SQ_LDS_UNALIGNED_STALL	Cycles	Number of cycles LDS is stalled processing flat unaligned load or store operations
SQ_LDS_MEM_VIOLATIONS	Count	Number of threads that have a memory violation in the LDS
SQ_LDS_IDX_ACTIVE	Cycles	Number of cycles LDS is used for indexed operations

Miscellaneous counters

Hardware counter	Unit	Definition
SQ_IFETCH	Count	Number of instruction fetch requests from L1i, in 32-byte width
SQ_ITEMS	Threads	Number of valid items per wave

L1 instruction cache (L1i) and scalar L1 data cache (L1d) counters

Hardware counter	Unit	Definition
SQC_ICACHE_REQ	Req	Number of L1 instruction (L1i) cache requests
SQC_ICACHE_HITS	Count	Number of L1i cache hits
SQC_ICACHE_MISSES	Count	Number of non-duplicate L1i cache misses including uncached requests
SQC_ICACHE_MISSES_DUPLICATE	Count	Number of duplicate L1i cache misses whose previous lookup miss on the same cache line is not fulfilled yet
SQC_DCACHE_REQ	Req	Number of scalar L1d requests
SQC_DCACHE_INPUT_VALID_READYB	Cycles	Number of cycles while sequencer input is valid but scalar L1d is not ready
SQC_DCACHE_HITS	Count	Number of scalar L1d hits
SQC_DCACHE_MISSES	Count	Number of non-duplicate scalar L1d misses including uncached requests
SQC_DCACHE_MISSES_DUPLICATE	Count	Number of duplicate scalar L1d misses
SQC_DCACHE_REQ_READ_1	Req	Number of constant cache read requests in a single 32-bit data word
SQC_DCACHE_REQ_READ_2	Req	Number of constant cache read requests in two 32-bit data words
SQC_DCACHE_REQ_READ_4	Req	Number of constant cache read requests in four 32-bit data words
SQC_DCACHE_REQ_READ_8	Req	Number of constant cache read requests in eight 32-bit data words
SQC_DCACHE_REQ_READ_16	Req	Number of constant cache read requests in 16 32-bit data words
SQC_DCACHE_ATOMIC	Req	Number of atomic requests
SQC_TC_REQ	Req	Number of texture cache requests that were issued by instruction and constant caches
SQC_TC_INST_REQ	Req	Number of instruction requests to the L2 cache
SQC_TC_DATA_READ_REQ	Req	Number of data Read requests to the L2 cache
SQC_TC_DATA_WRITE_REQ	Req	Number of data write requests to the L2 cache
SQC_TC_DATA_ATOMIC_REQ	Req	Number of data atomic requests to the L2 cache
SQC_TC_STALL	Cycles	Number of cycles while the valid requests to the L2 cache are stalled

Vector L1 cache subsystem counters

The vector L1 cache subsystem counters are further classified into texture addressing unit, texture data unit, vector L1d or texture cache per pipe, and texture cache arbiter counters.

Texture addressing unit counters

Hardware counter	Unit	Definition	Value range for n
TA_TA_BUSY[n]	Cycles	Texture addressing unit busy cycles	0-15
TA_TOTAL_WAVEFRONTS[n]	Instr	Number of wavefronts processed by texture addressing unit	0-15
TA_BUFFER_WAVEFRONTS[n]	Instr	Number of buffer wavefronts processed by texture addressing unit	0-15
TA_BUFFER_READ_WAVEFRONTS[n]	Instr	Number of buffer read wavefronts processed by texture addressing unit	0-15
TA_BUFFER_WRITE_WAVEFRONTS[n]	Instr	Number of buffer write wavefronts processed by texture addressing unit	0-15
TA_BUFFER_ATOMIC_WAVEFRONTS[n]	Instr	Number of buffer atomic wavefronts processed by texture addressing unit	0-15
TA_BUFFER_TOTAL_CYCLES[n]	Cycles	Number of buffer cycles (including read and write) issued to texture cache	0-15
TA_BUFFER_COALESCED_READ_CYCLES[n]	Cycles	Number of coalesced buffer read cycles issued to texture cache	0-15
TA_BUFFER_COALESCED_WRITE_CYCLES[n]	Cycles	Number of coalesced buffer write cycles issued to texture cache	0-15
TA_ADDR_STALLED_BY_TC_CYCLES[n]	Cycles	Number of cycles texture addressing unit address path is stalled by texture cache	0-15
TA_DATA_STALLED_BY_TC_CYCLES[n]	Cycles	Number of cycles texture addressing unit data path is stalled by texture cache	0-15
TA_ADDR_STALLED_BY_TD_CYCLES[n]	Cycles	Number of cycles texture addressing unit address path is stalled by texture data unit	0-15
TA_FLAT_WAVEFRONTS[n]	Instr	Number of flat opcode wavefronts processed by texture addressing unit	0-15
TA_FLAT_READ_WAVEFRONTS[n]	Instr	Number of flat opcode read wavefronts processed by texture addressing unit	0-15
TA_FLAT_WRITE_WAVEFRONTS[n]	Instr	Number of flat opcode write wavefronts processed by texture addressing unit	0-15
TA_FLAT_ATOMIC_WAVEFRONTS[n]	Instr	Number of flat opcode atomic wavefronts processed by texture addressing unit	0-15

Texture data unit counters

Hardware counter	Unit	Definition	Value range for n
TD_TD_BUSY[n]	Cycle	Texture data unit busy cycles while it is processing or waiting for data	0-15
TD_TC_STALL[n]	Cycle	Number of cycles texture data unit is stalled waiting for texture cache data	0-15
TD_SPI_STALL[n]	Cycle	Number of cycles texture data unit is stalled by shader processor input	0-15
TD_LOAD_WAVEFRONT[n]	Instr	Number of wavefront instructions (read, write, atomic)	0-15
TD_STORE_WAVEFRONT[n]	Instr	Number of write wavefront instructions	0-15
TD_ATOMIC_WAVEFRONT[n]	Instr	Number of atomic wavefront instructions	0-15
TD_COALESCABLE_WAVEFRONT[n]	Instr	Number of coalescable wavefronts according to texture addressing unit	0-15

Texture cache per pipe counters

Hardware counter	Unit	Definition	Value range for n
TCP_GATE_EN1[n]	Cycles	Number of cycles vector L1d interface clocks are turned on	0-15
TCP_GATE_EN2[n]	Cycles	Number of cycles vector L1d core clocks are turned on	0-15
TCP_TD_TCP_STALL_CYCLES[n]	Cycles	Number of cycles texture data unit stalls vector L1d	0-15
TCP_TCR_TCP_STALL_CYCLES[n]	Cycles	Number of cycles texture cache router stalls vector L1d	0-15
TCP_READ_TAGCONFLICT_STALL_CYCLES[n]	Cycles	Number of cycles tag RAM conflict stalls on a read	0-15
TCP_WRITE_TAGCONFLICT_STALL_CYCLES[n]	Cycles	Number of cycles tag RAM conflict stalls on a write	0-15
TCP_ATOMIC_TAGCONFLICT_STALL_CYCLES[n]	Cycles	Number of cycles tag RAM conflict stalls on an atomic	0-15
TCP_PENDING_STALL_CYCLES[n]	Cycles	Number of cycles vector L1d is stalled due to data pending from L2 Cache	0-15
TCP_TCP_TA_DATA_STALL_CYCLES	Cycles	Number of cycles texture cache per pipe stalls texture addressing unit data interface	NA
TCP_TA_TCP_STATE_READ[n]	Req	Number of state reads	0-15
TCP_VOLATILE[n]	Req	Number of L1 volatile pixels or buffers from texture addressing unit	0-15
TCP_TOTAL_ACCESSES[n]	Req	Number of vector L1d accesses. Equals TCP_PERF_SEL_TOTAL_READ`+`TCP_PERF_SEL_TOTAL_NONREAD	0-15
TCP_TOTAL_READ[n]	Req	Number of vector L1d read accesses	0-15
TCP_TOTAL_WRITE[n]	Req	Number of vector L1d write accesses	0-15
TCP_TOTAL_ATOMIC_WITH_RET[n]	Req	Number of vector L1d atomic requests with return	0-15
TCP_TOTAL_ATOMIC_WITHOUT_RET[n]	Req	Number of vector L1d atomic without return	0-15
TCP_TOTAL_WRITEBACK_INVALIDATES[n]	Count	Total number of vector L1d writebacks and invalidates	0-15
TCP_UTCL1_REQUEST[n]	Req	Number of address translation requests to unified translation cache (L1)	0-15
TCP_UTCL1_TRANSLATION_HIT[n]	Req	Number of unified translation cache (L1) translation hits	0-15
TCP_UTCL1_TRANSLATION_MISS[n]	Req	Number of unified translation cache (L1) translation misses	0-15
TCP_UTCL1_PERMISSION_MISS[n]	Req	Number of unified translation cache (L1) permission misses	0-15
TCP_TOTAL_CACHE_ACCESSES[n]	Req	Number of vector L1d cache accesses including hits and misses	0-15
TCP_TCP_LATENCY[n]	Cycles	MI200 series only Accumulated wave access latency to vL1D over all wavefronts	0-15
TCP_TCC_READ_REQ_LATENCY[n]	Cycles	MI200 series only Total vL1D to L2 request latency over all wavefronts for reads and atomics with return	0-15
TCP_TCC_WRITE_REQ_LATENCY[n]	Cycles	MI200 series only Total vL1D to L2 request latency over all wavefronts for writes and atomics without return	0-15
TCP_TCC_READ_REQ[n]	Req	Number of read requests to L2 cache	0-15
TCP_TCC_WRITE_REQ[n]	Req	Number of write requests to L2 cache	0-15
TCP_TCC_ATOMIC_WITH_RET_REQ[n]	Req	Number of atomic requests to L2 cache with return	0-15
TCP_TCC_ATOMIC_WITHOUT_RET_REQ[n]	Req	Number of atomic requests to L2 cache without return	0-15
TCP_TCC_NC_READ_REQ[n]	Req	Number of non-coherently cached read requests to L2 cache	0-15
TCP_TCC_UC_READ_REQ[n]	Req	Number of uncached read requests to L2 cache	0-15
TCP_TCC_CC_READ_REQ[n]	Req	Number of coherently cached read requests to L2 cache	0-15
TCP_TCC_RW_READ_REQ[n]	Req	Number of coherently cached with write read requests to L2 cache	0-15
TCP_TCC_NC_WRITE_REQ[n]	Req	Number of non-coherently cached write requests to L2 cache	0-15
TCP_TCC_UC_WRITE_REQ[n]	Req	Number of uncached write requests to L2 cache	0-15
TCP_TCC_CC_WRITE_REQ[n]	Req	Number of coherently cached write requests to L2 cache	0-15
TCP_TCC_RW_WRITE_REQ[n]	Req	Number of coherently cached with write write requests to L2 cache	0-15
TCP_TCC_NC_ATOMIC_REQ[n]	Req	Number of non-coherently cached atomic requests to L2 cache	0-15
TCP_TCC_UC_ATOMIC_REQ[n]	Req	Number of uncached atomic requests to L2 cache	0-15
TCP_TCC_CC_ATOMIC_REQ[n]	Req	Number of coherently cached atomic requests to L2 cache	0-15
TCP_TCC_RW_ATOMIC_REQ[n]	Req	Number of coherently cached with write atomic requests to L2 cache	0-15

Note that:

• TCP_TOTAL_READ[n] = TCP_PERF_SEL_TOTAL_HIT_LRU_READ + TCP_PERF_SEL_TOTAL_MISS_LRU_READ + TCP_PERF_SEL_TOTAL_MISS_EVICT_READ

• TCP_TOTAL_WRITE[n] = TCP_PERF_SEL_TOTAL_MISS_LRU_WRITE``+ ``TCP_PERF_SEL_TOTAL_MISS_EVICT_WRITE

• TCP_TOTAL_WRITEBACK_INVALIDATES[n] = TCP_PERF_SEL_TOTAL_WBINVL1``+ ``TCP_PERF_SEL_TOTAL_WBINVL1_VOL``+ ``TCP_PERF_SEL_CP_TCP_INVALIDATE``+ ``TCP_PERF_SEL_SQ_TCP_INVALIDATE_VOL

Texture cache arbiter counters

Hardware counter	Unit	Definition	Value range for n
TCA_CYCLE[n]	Cycles	Number of texture cache arbiter cycles	0-31
TCA_BUSY[n]	Cycles	Number of cycles texture cache arbiter has a pending request	0-31

L2 cache access counters

L2 cache is also known as texture cache per channel.

MI300 hardware counter

Hardware counter	Unit	Definition	Value range for n
TCC_CYCLE[n]	Cycles	Number of L2 cache free-running clocks	0-31
TCC_BUSY[n]	Cycles	Number of L2 cache busy cycles	0-31
TCC_REQ[n]	Req	Number of L2 cache requests of all types (measured at the tag block)	0-31
TCC_STREAMING_REQ[n]	Req	Number of L2 cache streaming requests (measured at the tag block)	0-31
TCC_NC_REQ[n]	Req	Number of non-coherently cached requests (measured at the tag block)	0-31
TCC_UC_REQ[n]	Req	Number of uncached requests. This is measured at the tag block	0-31
TCC_CC_REQ[n]	Req	Number of coherently cached requests. This is measured at the tag block	0-31
TCC_RW_REQ[n]	Req	Number of coherently cached with write requests. This is measured at the tag block	0-31
TCC_PROBE[n]	Req	Number of probe requests	0-31
TCC_PROBE_ALL[n]	Req	Number of external probe requests with EA_TCC_preq_all == 1	0-31
TCC_READ[n]	Req	Number of L2 cache read requests (includes compressed reads but not metadata reads)	0-31
TCC_WRITE[n]	Req	Number of L2 cache write requests	0-31
TCC_ATOMIC[n]	Req	Number of L2 cache atomic requests of all types	0-31
TCC_HIT[n]	Req	Number of L2 cache hits	0-31
TCC_MISS[n]	Req	Number of L2 cache misses	0-31
TCC_WRITEBACK[n]	Req	Number of lines written back to the main memory, including writebacks of dirty lines and uncached write or atomic requests	0-31
TCC_EA0_WRREQ[n]	Req	Number of 32-byte and 64-byte transactions going over the TC_EA_wrreq interface (doesn’t include probe commands)	0-31
TCC_EA0_WRREQ_64B[n]	Req	Total number of 64-byte transactions (write or CMPSWAP) going over the TC_EA_wrreq interface	0-31
TCC_EA0_WR_UNCACHED_32B[n]	Req	Number of 32 or 64-byte write or atomic going over the TC_EA_wrreq interface due to uncached traffic	0-31
TCC_EA0_WRREQ_STALL[n]	Cycles	Number of cycles a write request is stalled	0-31
TCC_EA0_WRREQ_IO_CREDIT_STALL[n]	Cycles	Number of cycles an efficiency arbiter write request is stalled due to the interface running out of input-output (IO) credits	0-31
TCC_EA0_WRREQ_GMI_CREDIT_STALL[n]	Cycles	Number of cycles an efficiency arbiter write request is stalled due to the interface running out of GMI credits	0-31
TCC_EA0_WRREQ_DRAM_CREDIT_STALL[n]	Cycles	Number of cycles an efficiency arbiter write request is stalled due to the interface running out of DRAM credits	0-31
TCC_TOO_MANY_EA_WRREQS_STALL[n]	Cycles	Number of cycles the L2 cache is unable to send an efficiency arbiter write request due to it reaching its maximum capacity of pending efficiency arbiter write requests	0-31
TCC_EA0_WRREQ_LEVEL[n]	Req	The accumulated number of efficiency arbiter write requests in flight	0-31
TCC_EA0_ATOMIC[n]	Req	Number of 32-byte or 64-byte atomic requests going over the TC_EA_wrreq interface	0-31
TCC_EA0_ATOMIC_LEVEL[n]	Req	The accumulated number of efficiency arbiter atomic requests in flight	0-31
TCC_EA0_RDREQ[n]	Req	Number of 32-byte or 64-byte read requests to efficiency arbiter	0-31
TCC_EA0_RDREQ_32B[n]	Req	Number of 32-byte read requests to efficiency arbiter	0-31
TCC_EA0_RD_UNCACHED_32B[n]	Req	Number of 32-byte efficiency arbiter reads due to uncached traffic. A 64-byte request is counted as 2	0-31
TCC_EA0_RDREQ_IO_CREDIT_STALL[n]	Cycles	Number of cycles there is a stall due to the read request interface running out of IO credits	0-31
TCC_EA0_RDREQ_GMI_CREDIT_STALL[n]	Cycles	Number of cycles there is a stall due to the read request interface running out of GMI credits	0-31
TCC_EA0_RDREQ_DRAM_CREDIT_STALL[n]	Cycles	Number of cycles there is a stall due to the read request interface running out of DRAM credits	0-31
TCC_EA0_RDREQ_LEVEL[n]	Req	The accumulated number of efficiency arbiter read requests in flight	0-31
TCC_EA0_RDREQ_DRAM[n]	Req	Number of 32-byte or 64-byte efficiency arbiter read requests to High Bandwidth Memory (HBM)	0-31
TCC_EA0_WRREQ_DRAM[n]	Req	Number of 32-byte or 64-byte efficiency arbiter write requests to HBM	0-31
TCC_TAG_STALL[n]	Cycles	Number of cycles the normal request pipeline in the tag is stalled for any reason	0-31
TCC_NORMAL_WRITEBACK[n]	Req	Number of writebacks due to requests that are not writeback requests	0-31
TCC_ALL_TC_OP_WB_WRITEBACK[n]	Req	Number of writebacks due to all TC_OP writeback requests	0-31
TCC_NORMAL_EVICT[n]	Req	Number of evictions due to requests that are not invalidate or probe requests	0-31
TCC_ALL_TC_OP_INV_EVICT[n]	Req	Number of evictions due to all TC_OP invalidate requests	0-31

MI200 hardware counter

Hardware counter	Unit	Definition	Value range for n
TCC_CYCLE[n]	Cycles	Number of L2 cache free-running clocks	0-31
TCC_BUSY[n]	Cycles	Number of L2 cache busy cycles	0-31
TCC_REQ[n]	Req	Number of L2 cache requests of all types (measured at the tag block)	0-31
TCC_STREAMING_REQ[n]	Req	Number of L2 cache streaming requests (measured at the tag block)	0-31
TCC_NC_REQ[n]	Req	Number of non-coherently cached requests (measured at the tag block)	0-31
TCC_UC_REQ[n]	Req	Number of uncached requests. This is measured at the tag block	0-31
TCC_CC_REQ[n]	Req	Number of coherently cached requests. This is measured at the tag block	0-31
TCC_RW_REQ[n]	Req	Number of coherently cached with write requests. This is measured at the tag block	0-31
TCC_PROBE[n]	Req	Number of probe requests	0-31
TCC_PROBE_ALL[n]	Req	Number of external probe requests with EA_TCC_preq_all == 1	0-31
TCC_READ[n]	Req	Number of L2 cache read requests (includes compressed reads but not metadata reads)	0-31
TCC_WRITE[n]	Req	Number of L2 cache write requests	0-31
TCC_ATOMIC[n]	Req	Number of L2 cache atomic requests of all types	0-31
TCC_HIT[n]	Req	Number of L2 cache hits	0-31
TCC_MISS[n]	Req	Number of L2 cache misses	0-31
TCC_WRITEBACK[n]	Req	Number of lines written back to the main memory, including writebacks of dirty lines and uncached write or atomic requests	0-31
TCC_EA_WRREQ[n]	Req	Number of 32-byte and 64-byte transactions going over the TC_EA_wrreq interface (doesn’t include probe commands)	0-31
TCC_EA_WRREQ_64B[n]	Req	Total number of 64-byte transactions (write or CMPSWAP) going over the TC_EA_wrreq interface	0-31
TCC_EA_WR_UNCACHED_32B[n]	Req	Number of 32 write or atomic going over the TC_EA_wrreq interface due to uncached traffic. A 64-byte request will be counted as 2	0-31
TCC_EA_WRREQ_STALL[n]	Cycles	Number of cycles a write request is stalled	0-31
TCC_EA_WRREQ_IO_CREDIT_STALL[n]	Cycles	Number of cycles an efficiency arbiter write request is stalled due to the interface running out of input-output (IO) credits	0-31
TCC_EA_WRREQ_GMI_CREDIT_STALL[n]	Cycles	Number of cycles an efficiency arbiter write request is stalled due to the interface running out of GMI credits	0-31
TCC_EA_WRREQ_DRAM_CREDIT_STALL[n]	Cycles	Number of cycles an efficiency arbiter write request is stalled due to the interface running out of DRAM credits	0-31
TCC_TOO_MANY_EA_WRREQS_STALL[n]	Cycles	Number of cycles the L2 cache is unable to send an efficiency arbiter write request due to it reaching its maximum capacity of pending efficiency arbiter write requests	0-31
TCC_EA_WRREQ_LEVEL[n]	Req	The accumulated number of efficiency arbiter write requests in flight	0-31
TCC_EA_ATOMIC[n]	Req	Number of 32-byte or 64-byte atomic requests going over the TC_EA_wrreq interface	0-31
TCC_EA_ATOMIC_LEVEL[n]	Req	The accumulated number of efficiency arbiter atomic requests in flight	0-31
TCC_EA_RDREQ[n]	Req	Number of 32-byte or 64-byte read requests to efficiency arbiter	0-31
TCC_EA_RDREQ_32B[n]	Req	Number of 32-byte read requests to efficiency arbiter	0-31
TCC_EA_RD_UNCACHED_32B[n]	Req	Number of 32-byte efficiency arbiter reads due to uncached traffic. A 64-byte request is counted as 2	0-31
TCC_EA_RDREQ_IO_CREDIT_STALL[n]	Cycles	Number of cycles there is a stall due to the read request interface running out of IO credits	0-31
TCC_EA_RDREQ_GMI_CREDIT_STALL[n]	Cycles	Number of cycles there is a stall due to the read request interface running out of GMI credits	0-31
TCC_EA_RDREQ_DRAM_CREDIT_STALL[n]	Cycles	Number of cycles there is a stall due to the read request interface running out of DRAM credits	0-31
TCC_EA_RDREQ_LEVEL[n]	Req	The accumulated number of efficiency arbiter read requests in flight	0-31
TCC_EA_RDREQ_DRAM[n]	Req	Number of 32-byte or 64-byte efficiency arbiter read requests to High Bandwidth Memory (HBM)	0-31
TCC_EA_WRREQ_DRAM[n]	Req	Number of 32-byte or 64-byte efficiency arbiter write requests to HBM	0-31
TCC_TAG_STALL[n]	Cycles	Number of cycles the normal request pipeline in the tag is stalled for any reason	0-31
TCC_NORMAL_WRITEBACK[n]	Req	Number of writebacks due to requests that are not writeback requests	0-31
TCC_ALL_TC_OP_WB_WRITEBACK[n]	Req	Number of writebacks due to all TC_OP writeback requests	0-31
TCC_NORMAL_EVICT[n]	Req	Number of evictions due to requests that are not invalidate or probe requests	0-31
TCC_ALL_TC_OP_INV_EVICT[n]	Req	Number of evictions due to all TC_OP invalidate requests	0-31

Note the following:

• TCC_REQ[n] may be more than the number of requests arriving at the texture cache per channel, but it’s a good indication of the total amount of work that needs to be performed.

• For TCC_EA0_WRREQ[n], atomics may travel over the same interface and are generally classified as write requests.

• CC mtypes can produce uncached requests, and those are included in TCC_EA0_WR_UNCACHED_32B[n]

• TCC_EA0_WRREQ_LEVEL[n] is primarily intended to measure average efficiency arbiter write latency.

  • Average write latency = TCC_PERF_SEL_EA0_WRREQ_LEVEL divided by TCC_PERF_SEL_EA0_WRREQ

• TCC_EA0_ATOMIC_LEVEL[n] is primarily intended to measure average efficiency arbiter atomic latency

  • Average atomic latency = TCC_PERF_SEL_EA0_WRREQ_ATOMIC_LEVEL divided by TCC_PERF_SEL_EA0_WRREQ_ATOMIC

• TCC_EA0_RDREQ_LEVEL[n] is primarily intended to measure average efficiency arbiter read latency.

  • Average read latency = TCC_PERF_SEL_EA0_RDREQ_LEVEL divided by TCC_PERF_SEL_EA0_RDREQ

• Stalls can occur regardless of the need for a read to be performed

• Normally, stalls are measured exactly at one point in the pipeline however in the case of TCC_TAG_STALL[n], probes can stall the pipeline at a variety of places. There is no single point that can accurately measure the total stalls

MI300 and MI200 series derived metrics list

Hardware counter	Definition
ALUStalledByLDS	Percentage of GPU time ALU units are stalled due to the LDS input queue being full or the output queue not being ready (value range: 0% (optimal) to 100%)
FetchSize	Total kilobytes fetched from the video memory; measured with all extra fetches and any cache or memory effects taken into account
FlatLDSInsts	Average number of flat instructions that read from or write to LDS, run per work item (affected by flow control)
FlatVMemInsts	Average number of flat instructions that read from or write to the video memory, run per work item (affected by flow control). Includes flat instructions that read from or write to scratch
GDSInsts	Average number of global data share read or write instructions run per work item (affected by flow control)
GPUBusy	Percentage of time GPU is busy
L2CacheHit	Percentage of fetch, write, atomic, and other instructions that hit the data in L2 cache (value range: 0% (no hit) to 100% (optimal))
LDSBankConflict	Percentage of GPU time LDS is stalled by bank conflicts (value range: 0% (optimal) to 100%)
LDSInsts	Average number of LDS read or write instructions run per work item (affected by flow control). Excludes flat instructions that read from or write to LDS.
MemUnitBusy	Percentage of GPU time the memory unit is active, which is measured with all extra fetches and writes and any cache or memory effects taken into account (value range: 0% to 100% (fetch-bound))
MemUnitStalled	Percentage of GPU time the memory unit is stalled (value range: 0% (optimal) to 100%)
MemWrites32B	Total number of effective 32B write transactions to the memory
TCA_BUSY_sum	Total number of cycles texture cache arbiter has a pending request, over all texture cache arbiter instances
TCA_CYCLE_sum	Total number of cycles over all texture cache arbiter instances
SALUBusy	Percentage of GPU time scalar ALU instructions are processed (value range: 0% to 100% (optimal))
SALUInsts	Average number of scalar ALU instructions run per work item (affected by flow control)
SFetchInsts	Average number of scalar fetch instructions from the video memory run per work item (affected by flow control)
VALUBusy	Percentage of GPU time vector ALU instructions are processed (value range: 0% to 100% (optimal))
VALUInsts	Average number of vector ALU instructions run per work item (affected by flow control)
VALUUtilization	Percentage of active vector ALU threads in a wave, where a lower number can mean either more thread divergence in a wave or that the work-group size is not a multiple of 64 (value range: 0%, 100% (optimal - no thread divergence))
VFetchInsts	Average number of vector fetch instructions from the video memory run per work-item (affected by flow control); excludes flat instructions that fetch from video memory
VWriteInsts	Average number of vector write instructions to the video memory run per work-item (affected by flow control); excludes flat instructions that write to video memory
Wavefronts	Total wavefronts
WRITE_REQ_32B	Total number of 32-byte effective memory writes
WriteSize	Total kilobytes written to the video memory; measured with all extra fetches and any cache or memory effects taken into account
WriteUnitStalled	Percentage of GPU time the write unit is stalled (value range: 0% (optimal) to 100%)

You can lower ALUStalledByLDS by reducing LDS bank conflicts or number of LDS accesses. You can lower MemUnitStalled by reducing the number or size of fetches and writes. MemUnitBusy includes the stall time (MemUnitStalled).

Hardware counters by and over all texture addressing unit instances

The following table shows the hardware counters by all texture addressing unit instances.

Hardware counter	Definition
TA_BUFFER_WAVEFRONTS_sum	Total number of buffer wavefronts processed
TA_BUFFER_READ_WAVEFRONTS_sum	Total number of buffer read wavefronts processed
TA_BUFFER_WRITE_WAVEFRONTS_sum	Total number of buffer write wavefronts processed
TA_BUFFER_ATOMIC_WAVEFRONTS_sum	Total number of buffer atomic wavefronts processed
TA_BUFFER_TOTAL_CYCLES_sum	Total number of buffer cycles (including read and write) issued to texture cache
TA_BUFFER_COALESCED_READ_CYCLES_sum	Total number of coalesced buffer read cycles issued to texture cache
TA_BUFFER_COALESCED_WRITE_CYCLES_sum	Total number of coalesced buffer write cycles issued to texture cache
TA_FLAT_READ_WAVEFRONTS_sum	Sum of flat opcode reads processed
TA_FLAT_WRITE_WAVEFRONTS_sum	Sum of flat opcode writes processed
TA_FLAT_WAVEFRONTS_sum	Total number of flat opcode wavefronts processed
TA_FLAT_READ_WAVEFRONTS_sum	Total number of flat opcode read wavefronts processed
TA_FLAT_ATOMIC_WAVEFRONTS_sum	Total number of flat opcode atomic wavefronts processed
TA_TOTAL_WAVEFRONTS_sum	Total number of wavefronts processed

The following table shows the hardware counters over all texture addressing unit instances.

Hardware counter	Definition
TA_ADDR_STALLED_BY_TC_CYCLES_sum	Total number of cycles texture addressing unit address path is stalled by texture cache
TA_ADDR_STALLED_BY_TD_CYCLES_sum	Total number of cycles texture addressing unit address path is stalled by texture data unit
TA_BUSY_avr	Average number of busy cycles
TA_BUSY_max	Maximum number of texture addressing unit busy cycles
TA_BUSY_min	Minimum number of texture addressing unit busy cycles
TA_DATA_STALLED_BY_TC_CYCLES_sum	Total number of cycles texture addressing unit data path is stalled by texture cache
TA_TA_BUSY_sum	Total number of texture addressing unit busy cycles

Hardware counters over all texture cache per channel instances

Hardware counter	Definition
TCC_ALL_TC_OP_WB_WRITEBACK_sum	Total number of writebacks due to all TC_OP writeback requests.
TCC_ALL_TC_OP_INV_EVICT_sum	Total number of evictions due to all TC_OP invalidate requests.
TCC_ATOMIC_sum	Total number of L2 cache atomic requests of all types.
TCC_BUSY_avr	Average number of L2 cache busy cycles.
TCC_BUSY_sum	Total number of L2 cache busy cycles.
TCC_CC_REQ_sum	Total number of coherently cached requests.
TCC_CYCLE_sum	Total number of L2 cache free running clocks.
TCC_EA0_WRREQ_sum	Total number of 32-byte and 64-byte transactions going over the TC_EA0_wrreq interface. Atomics may travel over the same interface and are generally classified as write requests. This does not include probe commands.
TCC_EA0_WRREQ_64B_sum	Total number of 64-byte transactions (write or CMPSWAP) going over the TC_EA0_wrreq interface.
TCC_EA0_WR_UNCACHED_32B_sum	Total Number of 32-byte write or atomic going over the TC_EA0_wrreq interface due to uncached traffic. Note that coherently cached mtypes can produce uncached requests, and those are included in this. A 64-byte request is counted as 2.
TCC_EA0_WRREQ_STALL_sum	Total Number of cycles a write request is stalled, over all instances.
TCC_EA0_WRREQ_IO_CREDIT_STALL_sum	Total number of cycles an efficiency arbiter write request is stalled due to the interface running out of IO credits, over all instances.
TCC_EA0_WRREQ_GMI_CREDIT_STALL_sum	Total number of cycles an efficiency arbiter write request is stalled due to the interface running out of GMI credits, over all instances.
TCC_EA0_WRREQ_DRAM_CREDIT_STALL_sum	Total number of cycles an efficiency arbiter write request is stalled due to the interface running out of DRAM credits, over all instances.
TCC_EA0_WRREQ_LEVEL_sum	Total number of efficiency arbiter write requests in flight.
TCC_EA0_RDREQ_LEVEL_sum	Total number of efficiency arbiter read requests in flight.
TCC_EA0_ATOMIC_sum	Total Number of 32-byte or 64-byte atomic requests going over the TC_EA0_wrreq interface.
TCC_EA0_ATOMIC_LEVEL_sum	Total number of efficiency arbiter atomic requests in flight.
TCC_EA0_RDREQ_sum	Total number of 32-byte or 64-byte read requests to efficiency arbiter.
TCC_EA0_RDREQ_32B_sum	Total number of 32-byte read requests to efficiency arbiter.
TCC_EA0_RD_UNCACHED_32B_sum	Total number of 32-byte efficiency arbiter reads due to uncached traffic.
TCC_EA0_RDREQ_IO_CREDIT_STALL_sum	Total number of cycles there is a stall due to the read request interface running out of IO credits.
TCC_EA0_RDREQ_GMI_CREDIT_STALL_sum	Total number of cycles there is a stall due to the read request interface running out of GMI credits.
TCC_EA0_RDREQ_DRAM_CREDIT_STALL_sum	Total number of cycles there is a stall due to the read request interface running out of DRAM credits.
TCC_EA0_RDREQ_DRAM_sum	Total number of 32-byte or 64-byte efficiency arbiter read requests to HBM.
TCC_EA0_WRREQ_DRAM_sum	Total number of 32-byte or 64-byte efficiency arbiter write requests to HBM.
TCC_HIT_sum	Total number of L2 cache hits.
TCC_MISS_sum	Total number of L2 cache misses.
TCC_NC_REQ_sum	Total number of non-coherently cached requests.
TCC_NORMAL_WRITEBACK_sum	Total number of writebacks due to requests that are not writeback requests.
TCC_NORMAL_EVICT_sum	Total number of evictions due to requests that are not invalidate or probe requests.
TCC_PROBE_sum	Total number of probe requests.
TCC_PROBE_ALL_sum	Total number of external probe requests with EA0_TCC_preq_all == 1.
TCC_READ_sum	Total number of L2 cache read requests (including compressed reads but not metadata reads).
TCC_REQ_sum	Total number of all types of L2 cache requests.
TCC_RW_REQ_sum	Total number of coherently cached with write requests.
TCC_STREAMING_REQ_sum	Total number of L2 cache streaming requests.
TCC_TAG_STALL_sum	Total number of cycles the normal request pipeline in the tag is stalled for any reason.
TCC_TOO_MANY_EA0_WRREQS_STALL_sum	Total number of cycles L2 cache is unable to send an efficiency arbiter write request due to it reaching its maximum capacity of pending efficiency arbiter write requests.
TCC_UC_REQ_sum	Total number of uncached requests.
TCC_WRITE_sum	Total number of L2 cache write requests.
TCC_WRITEBACK_sum	Total number of lines written back to the main memory including writebacks of dirty lines and uncached write or atomic requests.
TCC_WRREQ_STALL_max	Maximum number of cycles a write request is stalled.

Hardware counters by, for, or over all texture cache per pipe instances

The following table shows the hardware counters by all texture cache per pipe instances.

Hardware counter	Definition
TCP_TA_TCP_STATE_READ_sum	Total number of state reads by ATCPPI
TCP_TOTAL_CACHE_ACCESSES_sum	Total number of vector L1d accesses (including hits and misses)
TCP_UTCL1_PERMISSION_MISS_sum	Total number of unified translation cache (L1) permission misses
TCP_UTCL1_REQUEST_sum	Total number of address translation requests to unified translation cache (L1)
TCP_UTCL1_TRANSLATION_MISS_sum	Total number of unified translation cache (L1) translation misses
TCP_UTCL1_TRANSLATION_HIT_sum	Total number of unified translation cache (L1) translation hits

The following table shows the hardware counters for all texture cache per pipe instances.

Hardware counter	Definition
TCP_TCC_READ_REQ_LATENCY_sum	Total vector L1d to L2 request latency over all wavefronts for reads and atomics with return
TCP_TCC_WRITE_REQ_LATENCY_sum	Total vector L1d to L2 request latency over all wavefronts for writes and atomics without return
TCP_TCP_LATENCY_sum	Total wave access latency to vector L1d over all wavefronts

The following table shows the hardware counters over all texture cache per pipe instances.

Hardware counter	Definition
TCP_ATOMIC_TAGCONFLICT_STALL_CYCLES_sum	Total number of cycles tag RAM conflict stalls on an atomic
TCP_GATE_EN1_sum	Total number of cycles vector L1d interface clocks are turned on
TCP_GATE_EN2_sum	Total number of cycles vector L1d core clocks are turned on
TCP_PENDING_STALL_CYCLES_sum	Total number of cycles vector L1d cache is stalled due to data pending from L2 Cache
TCP_READ_TAGCONFLICT_STALL_CYCLES_sum	Total number of cycles tag RAM conflict stalls on a read
TCP_TCC_ATOMIC_WITH_RET_REQ_sum	Total number of atomic requests to L2 cache with return
TCP_TCC_ATOMIC_WITHOUT_RET_REQ_sum	Total number of atomic requests to L2 cache without return
TCP_TCC_CC_READ_REQ_sum	Total number of coherently cached read requests to L2 cache
TCP_TCC_CC_WRITE_REQ_sum	Total number of coherently cached write requests to L2 cache
TCP_TCC_CC_ATOMIC_REQ_sum	Total number of coherently cached atomic requests to L2 cache
TCP_TCC_NC_READ_REQ_sum	Total number of non-coherently cached read requests to L2 cache
TCP_TCC_NC_WRITE_REQ_sum	Total number of non-coherently cached write requests to L2 cache
TCP_TCC_NC_ATOMIC_REQ_sum	Total number of non-coherently cached atomic requests to L2 cache
TCP_TCC_READ_REQ_sum	Total number of read requests to L2 cache
TCP_TCC_RW_READ_REQ_sum	Total number of coherently cached with write read requests to L2 cache
TCP_TCC_RW_WRITE_REQ_sum	Total number of coherently cached with write write requests to L2 cache
TCP_TCC_RW_ATOMIC_REQ_sum	Total number of coherently cached with write atomic requests to L2 cache
TCP_TCC_UC_READ_REQ_sum	Total number of uncached read requests to L2 cache
TCP_TCC_UC_WRITE_REQ_sum	Total number of uncached write requests to L2 cache
TCP_TCC_UC_ATOMIC_REQ_sum	Total number of uncached atomic requests to L2 cache
TCP_TCC_WRITE_REQ_sum	Total number of write requests to L2 cache
TCP_TCR_TCP_STALL_CYCLES_sum	Total number of cycles texture cache router stalls vector L1d
TCP_TD_TCP_STALL_CYCLES_sum	Total number of cycles texture data unit stalls vector L1d
TCP_TOTAL_ACCESSES_sum	Total number of vector L1d accesses
TCP_TOTAL_READ_sum	Total number of vector L1d read accesses
TCP_TOTAL_WRITE_sum	Total number of vector L1d write accesses
TCP_TOTAL_ATOMIC_WITH_RET_sum	Total number of vector L1d atomic requests with return
TCP_TOTAL_ATOMIC_WITHOUT_RET_sum	Total number of vector L1d atomic requests without return
TCP_TOTAL_WRITEBACK_INVALIDATES_sum	Total number of vector L1d writebacks and invalidates
TCP_VOLATILE_sum	Total number of L1 volatile pixels or buffers from texture addressing unit
TCP_WRITE_TAGCONFLICT_STALL_CYCLES_sum	Total number of cycles tag RAM conflict stalls on a write

Hardware counter over all texture data unit instances

Hardware counter	Definition
TD_ATOMIC_WAVEFRONT_sum	Total number of atomic wavefront instructions
TD_COALESCABLE_WAVEFRONT_sum	Total number of coalescable wavefronts according to texture addressing unit
TD_LOAD_WAVEFRONT_sum	Total number of wavefront instructions (read, write, atomic)
TD_SPI_STALL_sum	Total number of cycles texture data unit is stalled by shader processor input
TD_STORE_WAVEFRONT_sum	Total number of write wavefront instructions
TD_TC_STALL_sum	Total number of cycles texture data unit is stalled waiting for texture cache data
TD_TD_BUSY_sum	Total number of texture data unit busy cycles while it is processing or waiting for data