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submission 99219

Petr_Rocoss · python · License unknown

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Vendorable · source mirrored · license unknownView source →

No package. Vendor the mirrored source: 155 lines, June 9 Researcher Reciprocity License v1.0.

submission_production.py
curl "https://kernelindex.com/api/v1/implementations/kernelbot-conv2d-v2-99219?include=source"
interfacepython
Compatibility
measured onNVIDIA L4
declared hardwareNVIDIA L4
architecturessm_89
dtypesfp32

Benchmark evidence

1 measurement across 1 GPU, fastest first.

Operation / workload
Hardware
Latency
Rank
Observed
2D convolutionsuite of 5 cases
NVIDIA L4
784.3ms
#9 of 21
2025-11-23

Reported · How evidence levels are derived →

Source and license

sourceavailable
revision digestsha256:46d8d40f28463fdb1d2c04823ece117d5391795c2bdc0ac2a142a2b9f0034887
license declaredunknown
license concludedunknown
authorsPetr_Rocoss
imported2026-08-15

Techniques

Extracted from the mirrored source by pattern, never inferred. Each row cites its line.

autotune@triton.autotune(
num-warps = 8triton.Config({'BLOCK_H': 8, 'BLOCK_W': 256}, num_warps=8, num_stages=7),
stages = 7triton.Config({'BLOCK_H': 8, 'BLOCK_W': 256}, num_warps=8, num_stages=7),

Kernel source

submission_production.py155 lines
import torch
import triton
import triton.language as tl

@triton.autotune(
    configs=[
        # === H100/B200 Hopper Architecture ===
        # Максимальный prefetch (num_stages=7) для HBM3
        triton.Config({'BLOCK_H': 8, 'BLOCK_W': 256}, num_warps=8, num_stages=7),
        triton.Config({'BLOCK_H': 16, 'BLOCK_W': 128}, num_warps=8, num_stages=6),
        triton.Config({'BLOCK_H': 8, 'BLOCK_W': 128}, num_warps=8, num_stages=6),
        
        # === A100 Ampere ===
        triton.Config({'BLOCK_H': 16, 'BLOCK_W': 64}, num_warps=8, num_stages=5),
        triton.Config({'BLOCK_H': 4, 'BLOCK_W': 256}, num_warps=8, num_stages=5),
        
        # === L4 / Balanced ===
        triton.Config({'BLOCK_H': 4, 'BLOCK_W': 128}, num_warps=4, num_stages=4),
        triton.Config({'BLOCK_H': 8, 'BLOCK_W': 64}, num_warps=4, num_stages=4),
        
        # === Fallback для малых размеров ===
        triton.Config({'BLOCK_H': 2, 'BLOCK_W': 64}, num_warps=4, num_stages=3),
    ],
    key=['W_OUT', 'H_OUT', 'C_IN', 'K'],
)
@triton.jit
def conv2d_kernel_ultimate(
    input_ptr, weight_ptr, output_ptr,
    stride_in_n, stride_in_c, stride_in_h, stride_in_w,
    stride_w_out, stride_w_in, stride_w_h, stride_w_w,
    stride_out_n, stride_out_c, stride_out_h, stride_out_w,
    H_IN, W_IN, H_OUT, W_OUT, C_IN, C_OUT, K,
    BLOCK_H: tl.constexpr, BLOCK_W: tl.constexpr
):
    """
    Ultimate Conv2D Kernel для A100/H100/B200/L4.
    
    Ключевые оптимизации:
    1. Incremental pointer updates (избегаем умножений в цикле)
    2. Aggressive prefetch через num_stages=6-7
    3. 2D tiling с adaptive block sizes
    4. Mask hoisting (маски вычисляются один раз)
    5. Coalesced memory access через broadcasting
    """
    
    # === 1. Grid Decoding ===
    pid_w = tl.program_id(0)
    pid_h = tl.program_id(1)
    pid_z = tl.program_id(2)

    batch_idx = pid_z // C_OUT
    out_ch = pid_z % C_OUT

    # === 2. Coordinate Generation ===
    offs_h = pid_h * BLOCK_H + tl.arange(0, BLOCK_H)
    offs_w = pid_w * BLOCK_W + tl.arange(0, BLOCK_W)

    # === 3. Mask Hoisting (вычисляем один раз) ===
    mask_h = offs_h < H_OUT
    mask_w = offs_w < W_OUT
    mask_2d = mask_h[:, None] & mask_w[None, :]

    # === 4. Base Pointers (2D Broadcasting) ===
    # Output [batch, out_ch, h, w]
    ptr_out = (output_ptr + batch_idx * stride_out_n + out_ch * stride_out_c +
               offs_h[:, None] * stride_out_h + offs_w[None, :] * stride_out_w)

    # Input base [batch, ?, h, w]
    ptr_in_base = (input_ptr + batch_idx * stride_in_n +
                   offs_h[:, None] * stride_in_h + offs_w[None, :] * stride_in_w)

    # Weight base [out_ch, ?, ?, ?]
    ptr_wei_base = weight_ptr + out_ch * stride_w_out

    # === 5. Accumulator ===
    acc = tl.zeros([BLOCK_H, BLOCK_W], dtype=tl.float32)

    # === 6. Main Loop (Pointer Chasing Optimization) ===
    # Текущие указатели для каналов
    ptr_in_ch = ptr_in_base
    ptr_wei_ch = ptr_wei_base

    for cin in range(C_IN):
        # Локальные указатели для spatial loops
        ptr_in_kh = ptr_in_ch
        ptr_wei_kh = ptr_wei_ch
        
        for kh in range(K):
            # Еще более локальные указатели для kw loop
            ptr_in_kw = ptr_in_kh
            ptr_wei_kw = ptr_wei_kh
            
            for kw in range(K):
                # === A. Load Weight (scalar broadcast) ===
                w_val = tl.load(ptr_wei_kw)
                
                # === B. Load Input (vectorized 2D block) ===
                in_val = tl.load(ptr_in_kw, mask=mask_2d, other=0.0)
                
                # === C. FMA ===
                acc += in_val * w_val
                
                # Increment по ширине (kw)
                ptr_in_kw += stride_in_w
                ptr_wei_kw += stride_w_w
            
            # Increment по высоте (kh)
            ptr_in_kh += stride_in_h
            ptr_wei_kh += stride_w_h
        
        # Increment по каналам (cin)
        ptr_in_ch += stride_in_c
        ptr_wei_ch += stride_w_in

    # === 7. Store Result ===
    tl.store(ptr_out, acc, mask=mask_2d)


def custom_kernel(data):
    """
    Production-ready wrapper для Conv2D kernel.
    """
    input_tensor, kernel, output_tensor = data
    
    # Гарантируем contiguous layout для coalesced access
    input_tensor = input_tensor.contiguous()
    kernel = kernel.contiguous()
    
    # Размеры
    batch, c_in, h_in, w_in = input_tensor.shape
    c_out, _, k_h, k_w = kernel.shape
    
    h_out = h_in - k_h + 1
    w_out = w_in - k_w + 1
    
    # Grid configuration
    grid = lambda META: (
        triton.cdiv(w_out, META['BLOCK_W']),
        triton.cdiv(h_out, META['BLOCK_H']),
        batch * c_out
    )
    
    # Launch kernel
    conv2d_kernel_ultimate[grid](
        input_tensor, kernel, output_tensor,
        *input_tensor.stride(),
        *kernel.stride(),
        *output_tensor.stride(),
        h_in, w_in, h_out, w_out,
        c_in, c_out, k_h,
    )
    
    return output_tensor

scrolls · 155 lines total

Source code from GPU Mode and the KernelBot dataset · June 9 Researcher Reciprocity License v1.0

Changes from previous submission

Against this author's previous submission submission 99216.

⋯ 3 unchanged lines
@triton.autotune(
configs=[
- # === H100 (Hopper) Ultimate Configs ===
- # HBM3 требует агрессивного prefetching (stages=6/7) и широких транзакций.
-
- # 1. Max Bandwidth: Широкий фронт загрузки (256) + глубокий конвейер
+ # === H100/B200 Hopper Architecture ===
+ # Максимальный prefetch (num_stages=7) для HBM3
triton.Config({'BLOCK_H': 8, 'BLOCK_W': 256}, num_warps=8, num_stages=7),
-
- # 2. Max Reuse: Большой тайл по высоте для минимизации загрузок весов
triton.Config({'BLOCK_H': 16, 'BLOCK_W': 128}, num_warps=8, num_stages=6),
+ triton.Config({'BLOCK_H': 8, 'BLOCK_W': 128}, num_warps=8, num_stages=6),
- # 3. Balanced: Универсальная конфигурация для большинства слоев
- triton.Config({'BLOCK_H': 16, 'BLOCK_W': 64}, num_warps=8, num_stages=6),
+ # === A100 Ampere ===
+ triton.Config({'BLOCK_H': 16, 'BLOCK_W': 64}, num_warps=8, num_stages=5),
+ triton.Config({'BLOCK_H': 4, 'BLOCK_W': 256}, num_warps=8, num_stages=5),
- # 4. Latency Sensitive: Для небольших батчей
- triton.Config({'BLOCK_H': 8, 'BLOCK_W': 64}, num_warps=4, num_stages=4),
-
- # === A100 / Fallback ===
- triton.Config({'BLOCK_H': 8, 'BLOCK_W': 128}, num_warps=8, num_stages=5),
+ # === L4 / Balanced ===
triton.Config({'BLOCK_H': 4, 'BLOCK_W': 128}, num_warps=4, num_stages=4),
+ triton.Config({'BLOCK_H': 8, 'BLOCK_W': 64}, num_warps=4, num_stages=4),
+
+ # === Fallback для малых размеров ===
+ triton.Config({'BLOCK_H': 2, 'BLOCK_W': 64}, num_warps=4, num_stages=3),
],
key=['W_OUT', 'H_OUT', 'C_IN', 'K'],
)
⋯ 7 unchanged lines
BLOCK_H: tl.constexpr, BLOCK_W: tl.constexpr
):
"""
- Ultimate Conv2D Kernel for H100/A100.
+ Ultimate Conv2D Kernel для A100/H100/B200/L4.
- Improvements:
- 1. Pure Pointer Chasing: Убраны все умножения (MUL) из внутренних циклов.
- Используется только сложение (ADD) для обновления указателей.
- 2. Max Stages: Использование до 7 стадий конвейера для скрытия латентности памяти.
- 3. Static Masking: Маски вычисляются один раз вне циклов.
+ Ключевые оптимизации:
+ 1. Incremental pointer updates (избегаем умножений в цикле)
+ 2. Aggressive prefetch через num_stages=6-7
+ 3. 2D tiling с adaptive block sizes
+ 4. Mask hoisting (маски вычисляются один раз)
+ 5. Coalesced memory access через broadcasting
"""
- # --- 1. Setup ---
+ # === 1. Grid Decoding ===
pid_w = tl.program_id(0)
pid_h = tl.program_id(1)
pid_z = tl.program_id(2)
-
+
batch_idx = pid_z // C_OUT
out_ch = pid_z % C_OUT
-
- # --- 2. Offsets & Masks ---
+
+ # === 2. Coordinate Generation ===
offs_h = pid_h * BLOCK_H + tl.arange(0, BLOCK_H)
offs_w = pid_w * BLOCK_W + tl.arange(0, BLOCK_W)
-
- # Pre-calc masks.
- # При stride=1 и padding=0, выходные границы строже входных.
+
+ # === 3. Mask Hoisting (вычисляем один раз) ===
mask_h = offs_h < H_OUT
mask_w = offs_w < W_OUT
- mask_block = mask_h[:, None] & mask_w[None, :]
-
- # --- 3. Base Pointers Calculation ---
-
- # Output: Broadcasting offsets [BLOCK_H, BLOCK_W]
- ptr_out = output_ptr + \
- batch_idx * stride_out_n + \
- out_ch * stride_out_c + \
- (offs_h[:, None] * stride_out_h) + \
- (offs_w[None, :] * stride_out_w)
+ mask_2d = mask_h[:, None] & mask_w[None, :]
- # Input: Base position corresponding to top-left kernel corner
- # [BLOCK_H, BLOCK_W] tensor of pointers
- ptr_in_base = input_ptr + \
- batch_idx * stride_in_n + \
- (offs_h[:, None] * stride_in_h) + \
- (offs_w[None, :] * stride_in_w)
+ # === 4. Base Pointers (2D Broadcasting) ===
+ # Output [batch, out_ch, h, w]
+ ptr_out = (output_ptr + batch_idx * stride_out_n + out_ch * stride_out_c +
+ offs_h[:, None] * stride_out_h + offs_w[None, :] * stride_out_w)
- # Weight: Base scalar pointer
+ # Input base [batch, ?, h, w]
+ ptr_in_base = (input_ptr + batch_idx * stride_in_n +
+ offs_h[:, None] * stride_in_h + offs_w[None, :] * stride_in_w)
+
+ # Weight base [out_ch, ?, ?, ?]
ptr_wei_base = weight_ptr + out_ch * stride_w_out
-
- # Accumulator
+
+ # === 5. Accumulator ===
acc = tl.zeros([BLOCK_H, BLOCK_W], dtype=tl.float32)
-
- # --- 4. Optimized Loop Structure (Pointer Chasing) ---
-
- # Инициализируем "бегущие" указатели
- curr_in_ch = ptr_in_base
- curr_wei_ch = ptr_wei_base
-
+
+ # === 6. Main Loop (Pointer Chasing Optimization) ===
+ # Текущие указатели для каналов
+ ptr_in_ch = ptr_in_base
+ ptr_wei_ch = ptr_wei_base
+
for cin in range(C_IN):
- # Сохраняем начало канала, чтобы вернуться к нему (или двигаться от него)
- # Используем временные указатели для строк
- curr_in_row = curr_in_ch
- curr_wei_row = curr_wei_ch
+ # Локальные указатели для spatial loops
+ ptr_in_kh = ptr_in_ch
+ ptr_wei_kh = ptr_wei_ch
for kh in range(K):
- # Входим в самую горячую часть.
- # Копируем указатели для прохода по ширине (KW)
- curr_in_ptr = curr_in_row
- curr_wei_ptr = curr_wei_row
+ # Еще более локальные указатели для kw loop
+ ptr_in_kw = ptr_in_kh
+ ptr_wei_kw = ptr_wei_kh
for kw in range(K):
- # 1. Load Weight (Scalar)
- # Просто загружаем по текущему указателю
- wei_val = tl.load(curr_wei_ptr)
+ # === A. Load Weight (scalar broadcast) ===
+ w_val = tl.load(ptr_wei_kw)
- # 2. Load Input (Vectorized Block)
- # Загружаем по текущему указателю (он уже содержит все смещения H/W)
- in_val = tl.load(curr_in_ptr, mask=mask_block, other=0.0)
+ # === B. Load Input (vectorized 2D block) ===
+ in_val = tl.load(ptr_in_kw, mask=mask_2d, other=0.0)
- # 3. FMA
- acc = acc + in_val * wei_val
+ # === C. FMA ===
+ acc += in_val * w_val
- # 4. Pointer Increment (ALU optimization)
- # Вместо умножения (kw+1)*stride, просто добавляем stride.
- # Это супер-дешевая операция.
- curr_wei_ptr += stride_w_w
- curr_in_ptr += stride_in_w
-
- # Сдвиг вниз по высоте ядра
- curr_in_row += stride_in_h
- curr_wei_row += stride_w_h
+ # Increment по ширине (kw)
+ ptr_in_kw += stride_in_w
+ ptr_wei_kw += stride_w_w
- # Переход к следующему каналу
- curr_in_ch += stride_in_c
- curr_wei_ch += stride_w_in
+ # Increment по высоте (kh)
+ ptr_in_kh += stride_in_h
+ ptr_wei_kh += stride_w_h
+
+ # Increment по каналам (cin)
+ ptr_in_ch += stride_in_c
+ ptr_wei_ch += stride_w_in
- # --- 5. Store ---
- tl.store(ptr_out, acc, mask=mask_block)
+ # === 7. Store Result ===
+ tl.store(ptr_out, acc, mask=mask_2d)
def custom_kernel(data):
"""
- Ultimate Optimized Wrapper.
+ Production-ready wrapper для Conv2D kernel.
"""
input_tensor, kernel, output_tensor = data
- # Critical for vectorized loads on H100/A100
- if not input_tensor.is_contiguous():
- input_tensor = input_tensor.contiguous()
- if not kernel.is_contiguous():
- kernel = kernel.contiguous()
+ # Гарантируем contiguous layout для coalesced access
+ input_tensor = input_tensor.contiguous()
+ kernel = kernel.contiguous()
+ # Размеры
batch, c_in, h_in, w_in = input_tensor.shape
c_out, _, k_h, k_w = kernel.shape
h_out = h_in - k_h + 1
w_out = w_in - k_w + 1
- # Grid definition
+ # Grid configuration
grid = lambda META: (
triton.cdiv(w_out, META['BLOCK_W']),
triton.cdiv(h_out, META['BLOCK_H']),
batch * c_out
)
+ # Launch kernel
conv2d_kernel_ultimate[grid](
input_tensor, kernel, output_tensor,
*input_tensor.stride(),
⋯ 4 unchanged lines
)
return output_tensor
+
scrolls · 232 diff lines total

Best evidence level for this revision: reported

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