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print_swizzle_layout.py
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import argparse
def pretty_print_line(m: str = "",
sep: str = "-",
width: int = 130,
return_str: bool = False):
res_len = width - len(m)
left_len = int(res_len / 2)
right_len = res_len - left_len
pretty_line = sep * left_len + m + sep * right_len
if not return_str:
print(pretty_line)
else:
return pretty_line
PERMUTED_DOCS_STRING = \
"""----------------------------------------------------------------
[INFO] Assert smem store layout col_stride <= 16, prefer 16. |
[INFO] For logical_col_stride > 16, we have to permute the |
[INFO] smem store layout using col major ZigZag method: |
[INFO] e.g, --> Q smem logical layout [Br][64]. |
[INFO] --> col major ZigZag permuted --> |
[INFO] --> Q smem store layout [4][Br][16]. |
----------------------------------------------------------------"""
def swizzle_permuted_j(i: int,
j: int,
col_stride: int = 16,
num_elems_per_128b: int = 8):
# i: row index; j: col index. col_stride <= 16.
# assert col_stride <= 16, f"col_stride must <= 16, but got {col_stride}"
# for col_stride > 16, we have to permute it using col major ZigZag order.
# e.g, Q smem logical layout [Br,d]=[Br,64] -> store layout [4][Br][16].
return (
(int(j / num_elems_per_128b) ^ int(i / 4)) %
(int(col_stride / num_elems_per_128b))
) * num_elems_per_128b
def print_smem_swizzle_layout(rows: int = 16,
logical_col_stride: int = 16,
num_elems_per_128b: int = 8,
smem_pading: int = 0,
show_logical_col_id: bool = False,
use_logical_col_stride: bool = False):
# ----------------------------------------------------------------
# [INFO] Assert smem store layout col_stride <= 16, prefer 16. |
# [INFO] For logical_col_stride > 16, we have to permute the |
# [INFO] smem store layout using col major ZigZag method: |
# [INFO] e.g, --> Q smem logical layout [Br][64]. |
# [INFO] --> col major ZigZag permuted --> |
# [INFO] --> Q smem store layout [4][Br][16]. |
# ----------------------------------------------------------------
# ----------------------------------------------------------------
# -------------------------swizzle layout-------------------------
# --------------------logical col 0~64, step 8--------------------
# ---------------------smem col 0~16, step 8----------------------
# ----------------------------------------------------------------
# |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |
# |row 0 | 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|
# |row 1 | 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# |bank |b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|
# |row 2 | 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# |bank |b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|
# |row 3 | 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# ----------------------------------------------------------------
# |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |
# |row 4 | 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|
# |row 5 | 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# |bank |b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|
# |row 6 | 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# |bank |b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|
# |row 7 | 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# ----------------------------------------------------------------
# |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |
# |row 8 | 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|
# |row 9 | 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# |bank |b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|
# |row 10| 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# |bank |b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|
# |row 11| 0:0 | 8:8 |16:0 |24:8 |32:0 |40:8 |48:0 |56:8 |
# ----------------------------------------------------------------
# |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |
# |row 12| 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|
# |row 13| 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# |bank |b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|b16~19|b20~23|
# |row 14| 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# |bank |b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|b24~27|b28~31|
# |row 15| 0:8 | 8:0 |16:8 |24:0 |32:8 |40:0 |48:8 |56:0 |
# ----------------------------------------------------------------
str_len = 0
total_banks = 0
assert smem_pading == 0 or smem_pading == 8, "smem_pading must be 0 or 8"
# 4 bytes per bank
banks_per_col = int((16 * 2) / 4) if logical_col_stride >= 16 else 4
if use_logical_col_stride:
banks_per_col = int((logical_col_stride * 2) / 4)
if logical_col_stride > 16:
print(f"[WARN] col_stride must <= 16, but got {logical_col_stride}")
if smem_pading == 8:
banks_per_col += 4
print(f"[INFO] smem padding 8 half values, 4 banks, banks_per_col: {banks_per_col}")
banks_per_num_elems_per_128b = int((num_elems_per_128b * 2) / 4)
for i in range(rows):
layout_str_len = 0
banks_str_len = 0
# bank_layout_str
banks_start = total_banks % 32 # 32 banks in total
banks_end = (banks_start + banks_per_col)
bank_layout_str = f"|bank |"
max_bank_str_len = 0
if logical_col_stride >= 16 and (not use_logical_col_stride):
for k in range(int(logical_col_stride / 16)):
for j in range(banks_start, banks_end, banks_per_num_elems_per_128b):
curr_bank_str = f"b{j:>2}~{j + banks_per_num_elems_per_128b - 1:<2}|"
max_bank_str_len = max(max_bank_str_len, len(curr_bank_str))
bank_layout_str += curr_bank_str
else:
for j in range(banks_start, banks_end, banks_per_num_elems_per_128b):
curr_bank_str = f"b{j:>2}~{j + banks_per_num_elems_per_128b - 1:<2}|"
max_bank_str_len = max(max_bank_str_len, len(curr_bank_str))
bank_layout_str += curr_bank_str
# smem_layout_str
logical_col_ids = []
smem_layout_col_ids = []
if logical_col_stride >= 16 and (not use_logical_col_stride):
for k in range(int(logical_col_stride / 16)):
for j in range(0, 16, num_elems_per_128b):
layout_j = swizzle_permuted_j(i, j, 16,
num_elems_per_128b)
logical_col_ids.append(k * 16 + j)
smem_layout_col_ids.append(layout_j)
else:
for j in range(0, logical_col_stride, num_elems_per_128b):
layout_j = swizzle_permuted_j(i, j, logical_col_stride,
num_elems_per_128b)
logical_col_ids.append(j)
smem_layout_col_ids.append(layout_j)
smem_layout_str = f"|row {i:<2}|"
r = 0
for c, l in zip(logical_col_ids, smem_layout_col_ids):
smem_layout_str += pretty_print_line(
(f"{c:>2}:{l:<2}" if show_logical_col_id else f"{l:<2}"),
sep=" ",
width=(max_bank_str_len-1),
return_str=True
) + "|"
r += 1
if logical_col_stride >= 16:
if smem_pading == 8 and (r > 1 and r % 2 == 0):
smem_layout_str += pretty_print_line(
(f"pad"),
sep=" ", width=max_bank_str_len-1,
return_str=True
) + "|"
else:
if smem_pading == 8:
smem_layout_str += pretty_print_line(
(f"pad"),
sep=" ", width=max_bank_str_len-1,
return_str=True
) + "|"
layout_str_len = len(smem_layout_str)
str_len = max(layout_str_len, banks_str_len)
# print banks and smem layout
if (i == 0):
print("-" * str_len)
pretty_print_line(f"swizzle layout", width=str_len)
pretty_print_line(f"logical col 0~{logical_col_stride}, "
f"step {num_elems_per_128b}",
width=str_len)
pretty_print_line(f"smem col 0~16, step {num_elems_per_128b}"
if logical_col_stride >= 16
else f"smem col 0~8, step {num_elems_per_128b}",
width=str_len)
print("-" * str_len)
print(bank_layout_str)
print(smem_layout_str)
if ((i + 1) % 4 == 0 and i != (rows - 1)):
print("-" * str_len)
total_banks += banks_per_col
print("-" * str_len)
def get_args():
parser = argparse.ArgumentParser()
parser.add_argument("--rows", type=int, default=16)
parser.add_argument("--smem-padding", "--pad", type=int, default=0)
parser.add_argument("--num-elems-per-128b", "--num-elems", type=int, default=8)
parser.add_argument("--logical-col-stride", "--logical-col", "--col", type=int, default=64)
parser.add_argument("--use-logical-col-stride", "--use-logical-col", action="store_true")
parser.add_argument("--show-logical-col-id", "--show-logical-col", action="store_true")
return parser.parse_args()
if __name__ == "__main__":
args = get_args()
print(args)
print(PERMUTED_DOCS_STRING)
print_smem_swizzle_layout(rows=args.rows,
logical_col_stride=args.logical_col_stride,
num_elems_per_128b=args.num_elems_per_128b,
smem_pading=args.smem_padding,
show_logical_col_id=args.show_logical_col_id,
use_logical_col_stride=args.use_logical_col_stride)