snRuntime/src/perf_cnt.h

Classes

	Name
union	perf_reg32_t
struct	perf_regs_t

Types

	Name
enum	snrt_perf_cnt { SNRT_PERF_CNT0, SNRT_PERF_CNT1, SNRT_PERF_CNT2, SNRT_PERF_CNT3, SNRT_PERF_CNT4, SNRT_PERF_CNT5, SNRT_PERF_CNT6, SNRT_PERF_CNT7, SNRT_PERF_CNT8, SNRT_PERF_CNT9, SNRT_PERF_CNT10, SNRT_PERF_CNT11, SNRT_PERF_CNT12, SNRT_PERF_CNT13, SNRT_PERF_CNT14, SNRT_PERF_CNT15, SNRT_PERF_N_CNT} Different perf counters.
enum	snrt_perf_cnt_type { SNRT_PERF_CNT_CYCLES, SNRT_PERF_CNT_TCDM_ACCESSED, SNRT_PERF_CNT_TCDM_CONGESTED, SNRT_PERF_CNT_ISSUE_FPU, SNRT_PERF_CNT_ISSUE_FPU_SEQ, SNRT_PERF_CNT_ISSUE_CORE_TO_FPU, SNRT_PERF_CNT_RETIRED_INSTR, SNRT_PERF_CNT_RETIRED_LOAD, SNRT_PERF_CNT_RETIRED_I, SNRT_PERF_CNT_RETIRED_ACC, SNRT_PERF_CNT_DMA_AW_STALL, SNRT_PERF_CNT_DMA_AR_STALL, SNRT_PERF_CNT_DMA_R_STALL, SNRT_PERF_CNT_DMA_W_STALL, SNRT_PERF_CNT_DMA_BUF_W_STALL, SNRT_PERF_CNT_DMA_BUF_R_STALL, SNRT_PERF_CNT_DMA_AW_DONE, SNRT_PERF_CNT_DMA_AW_BW, SNRT_PERF_CNT_DMA_AR_DONE, SNRT_PERF_CNT_DMA_AR_BW, SNRT_PERF_CNT_DMA_R_DONE, SNRT_PERF_CNT_DMA_R_BW, SNRT_PERF_CNT_DMA_W_DONE, SNRT_PERF_CNT_DMA_W_BW, SNRT_PERF_CNT_DMA_B_DONE, SNRT_PERF_CNT_DMA_BUSY, SNRT_PERF_CNT_ICACHE_MISS, SNRT_PERF_CNT_ICACHE_HIT, SNRT_PERF_CNT_ICACHE_PREFETCH, SNRT_PERF_CNT_ICACHE_DOUBLE_HIT, SNRT_PERF_CNT_ICACHE_STALL} Different types of performance counters.

Functions

	Name
perf_regs_t *	snrt_perf_counters()
void	snrt_start_perf_counter(enum snrt_perf_cnt perf_cnt, enum snrt_perf_cnt_type perf_cnt_type, uint32_t hart_id)
void	snrt_stop_perf_counter(enum snrt_perf_cnt perf_cnt)
void	snrt_reset_perf_counter(enum snrt_perf_cnt perf_cnt)
uint32_t	snrt_get_perf_counter(enum snrt_perf_cnt perf_cnt)

Types Documentation

enum snrt_perf_cnt

Enumerator	Value	Description
SNRT_PERF_CNT0
SNRT_PERF_CNT1
SNRT_PERF_CNT2
SNRT_PERF_CNT3
SNRT_PERF_CNT4
SNRT_PERF_CNT5
SNRT_PERF_CNT6
SNRT_PERF_CNT7
SNRT_PERF_CNT8
SNRT_PERF_CNT9
SNRT_PERF_CNT10
SNRT_PERF_CNT11
SNRT_PERF_CNT12
SNRT_PERF_CNT13
SNRT_PERF_CNT14
SNRT_PERF_CNT15
SNRT_PERF_N_CNT

Different perf counters.

enum snrt_perf_cnt_type

Enumerator	Value	Description
SNRT_PERF_CNT_CYCLES
SNRT_PERF_CNT_TCDM_ACCESSED
SNRT_PERF_CNT_TCDM_CONGESTED
SNRT_PERF_CNT_ISSUE_FPU
SNRT_PERF_CNT_ISSUE_FPU_SEQ
SNRT_PERF_CNT_ISSUE_CORE_TO_FPU
SNRT_PERF_CNT_RETIRED_INSTR
SNRT_PERF_CNT_RETIRED_LOAD
SNRT_PERF_CNT_RETIRED_I
SNRT_PERF_CNT_RETIRED_ACC
SNRT_PERF_CNT_DMA_AW_STALL
SNRT_PERF_CNT_DMA_AR_STALL
SNRT_PERF_CNT_DMA_R_STALL
SNRT_PERF_CNT_DMA_W_STALL
SNRT_PERF_CNT_DMA_BUF_W_STALL
SNRT_PERF_CNT_DMA_BUF_R_STALL
SNRT_PERF_CNT_DMA_AW_DONE
SNRT_PERF_CNT_DMA_AW_BW
SNRT_PERF_CNT_DMA_AR_DONE
SNRT_PERF_CNT_DMA_AR_BW
SNRT_PERF_CNT_DMA_R_DONE
SNRT_PERF_CNT_DMA_R_BW
SNRT_PERF_CNT_DMA_W_DONE
SNRT_PERF_CNT_DMA_W_BW
SNRT_PERF_CNT_DMA_B_DONE
SNRT_PERF_CNT_DMA_BUSY
SNRT_PERF_CNT_ICACHE_MISS
SNRT_PERF_CNT_ICACHE_HIT
SNRT_PERF_CNT_ICACHE_PREFETCH
SNRT_PERF_CNT_ICACHE_DOUBLE_HIT
SNRT_PERF_CNT_ICACHE_STALL

Different types of performance counters.

Functions Documentation

function snrt_perf_counters

inline perf_regs_t * snrt_perf_counters()

function snrt_start_perf_counter

inline void snrt_start_perf_counter(
    enum snrt_perf_cnt perf_cnt,
    enum snrt_perf_cnt_type perf_cnt_type,
    uint32_t hart_id
)

function snrt_stop_perf_counter

inline void snrt_stop_perf_counter(
    enum snrt_perf_cnt perf_cnt
)

function snrt_reset_perf_counter

inline void snrt_reset_perf_counter(
    enum snrt_perf_cnt perf_cnt
)

function snrt_get_perf_counter

inline uint32_t snrt_get_perf_counter(
    enum snrt_perf_cnt perf_cnt
)

Source code

// Copyright 2023 ETH Zurich and University of Bologna.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0

// Must match with `snitch_cluster_peripheral`
enum snrt_perf_cnt {
    SNRT_PERF_CNT0,
    SNRT_PERF_CNT1,
    SNRT_PERF_CNT2,
    SNRT_PERF_CNT3,
    SNRT_PERF_CNT4,
    SNRT_PERF_CNT5,
    SNRT_PERF_CNT6,
    SNRT_PERF_CNT7,
    SNRT_PERF_CNT8,
    SNRT_PERF_CNT9,
    SNRT_PERF_CNT10,
    SNRT_PERF_CNT11,
    SNRT_PERF_CNT12,
    SNRT_PERF_CNT13,
    SNRT_PERF_CNT14,
    SNRT_PERF_CNT15,
    SNRT_PERF_N_CNT,
};

enum snrt_perf_cnt_type {
    SNRT_PERF_CNT_CYCLES,
    SNRT_PERF_CNT_TCDM_ACCESSED,
    SNRT_PERF_CNT_TCDM_CONGESTED,
    SNRT_PERF_CNT_ISSUE_FPU,
    SNRT_PERF_CNT_ISSUE_FPU_SEQ,
    SNRT_PERF_CNT_ISSUE_CORE_TO_FPU,
    SNRT_PERF_CNT_RETIRED_INSTR,
    SNRT_PERF_CNT_RETIRED_LOAD,
    SNRT_PERF_CNT_RETIRED_I,
    SNRT_PERF_CNT_RETIRED_ACC,
    SNRT_PERF_CNT_DMA_AW_STALL,
    SNRT_PERF_CNT_DMA_AR_STALL,
    SNRT_PERF_CNT_DMA_R_STALL,
    SNRT_PERF_CNT_DMA_W_STALL,
    SNRT_PERF_CNT_DMA_BUF_W_STALL,
    SNRT_PERF_CNT_DMA_BUF_R_STALL,
    SNRT_PERF_CNT_DMA_AW_DONE,
    SNRT_PERF_CNT_DMA_AW_BW,
    SNRT_PERF_CNT_DMA_AR_DONE,
    SNRT_PERF_CNT_DMA_AR_BW,
    SNRT_PERF_CNT_DMA_R_DONE,
    SNRT_PERF_CNT_DMA_R_BW,
    SNRT_PERF_CNT_DMA_W_DONE,
    SNRT_PERF_CNT_DMA_W_BW,
    SNRT_PERF_CNT_DMA_B_DONE,
    SNRT_PERF_CNT_DMA_BUSY,
    SNRT_PERF_CNT_ICACHE_MISS,
    SNRT_PERF_CNT_ICACHE_HIT,
    SNRT_PERF_CNT_ICACHE_PREFETCH,
    SNRT_PERF_CNT_ICACHE_DOUBLE_HIT,
    SNRT_PERF_CNT_ICACHE_STALL,
};

typedef union {
    uint32_t value __attribute__((aligned(8)));
} perf_reg32_t;

typedef struct {
    volatile perf_reg32_t enable[SNRT_PERF_N_CNT];
    volatile perf_reg32_t hart_select[SNRT_PERF_N_CNT];
    volatile perf_reg32_t perf_counter[SNRT_PERF_N_CNT];
} perf_regs_t;

inline perf_regs_t* snrt_perf_counters() {
    return (perf_regs_t*)snrt_cluster_perf_counters_addr();
}

// Enable a specific perf_counter
inline void snrt_start_perf_counter(enum snrt_perf_cnt perf_cnt,
                                    enum snrt_perf_cnt_type perf_cnt_type,
                                    uint32_t hart_id) {
    snrt_perf_counters()->hart_select[perf_cnt].value |= hart_id;
    snrt_perf_counters()->enable[perf_cnt].value = (0x1 << perf_cnt_type);
}

// Stops the counter but does not reset it
inline void snrt_stop_perf_counter(enum snrt_perf_cnt perf_cnt) {
    snrt_perf_counters()->enable[perf_cnt].value = 0x0;
}

// Resets the counter completely
inline void snrt_reset_perf_counter(enum snrt_perf_cnt perf_cnt) {
    snrt_perf_counters()->enable[perf_cnt].value = 0x0;
    snrt_perf_counters()->hart_select[perf_cnt].value = 0x0;
    snrt_perf_counters()->perf_counter[perf_cnt].value = 0x0;
}

// Get counter of specified perf_counter
inline uint32_t snrt_get_perf_counter(enum snrt_perf_cnt perf_cnt) {
    return (uint32_t)(snrt_perf_counters()->perf_counter[perf_cnt].value);
}

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Updated on 2023-06-19 at 09:43:56 +0000