| # Copyright (C) 2020-2021 Arm Limited or its affiliates. All rights reserved. |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| # |
| # Licensed under the Apache License, Version 2.0 (the License); you may |
| # not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an AS IS BASIS, WITHOUT |
| # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # Description: |
| # NPU performance estimation functions to estimate performance of a Pass and CascadedPass. Uses a model that takes the |
| # maximum of the 'cycles required for bandwidth' and 'cycles required for computing'. |
| # |
| # Called during scheduling to evaluate different proposals, as well as post-scheduling to provide a final performance |
| # estimate. |
| from enum import auto |
| from enum import IntEnum |
| |
| import numpy as np |
| |
| from . import numeric_util |
| from .architecture_features import Accelerator |
| from .architecture_features import Block |
| from .data_type import DataType |
| from .nn_graph import PassPlacement |
| from .nn_graph import SchedulerRewrite |
| from .operation import NpuBlockType |
| from .operation import Op |
| from .shared_buffer_allocation import is_acc_40bits_used |
| from .tensor import BandwidthDirection |
| from .tensor import MemArea |
| from .tensor import shape_num_elements |
| from .tensor import Tensor |
| from .tensor import TensorBlockTraversal |
| from .tensor import TensorFormat |
| from .tensor import TensorPurpose |
| |
| |
| def rolling_buffer_dims_from_passes(arch, ps1, block_config_ps1, ps2, block_config_ps2): |
| ofm_block = Block(block_config_ps2[-3], block_config_ps2[-4], block_config_ps2[-1]) |
| kernel = ps2.primary_op.kernel |
| |
| if ps2.npu_block_type in (NpuBlockType.ConvolutionMxN, NpuBlockType.VectorProduct): |
| op = ps2.primary_op |
| ifm_block_depth = arch.calc_ifm_block_depth(op.ifm_shapes[0].depth, op.ifm.dtype.size_in_bits()) |
| else: |
| ifm_block_depth = block_config_ps2[-1] |
| |
| ifm_block = arch.get_ifm_block_size(ifm_block_depth, ofm_block, kernel, arch.ofm_block_max) |
| |
| # The performed height calculation is for worst case |
| height = numeric_util.round_up(ifm_block.height + block_config_ps1[0], block_config_ps1[0]) |
| width = ifm_block.width |
| return [height, width] |
| |
| |
| class PassCycles(IntEnum): |
| Npu = 0 |
| SramAccess = auto() |
| DramAccess = auto() |
| OnChipFlashAccess = auto() |
| OffChipFlashAccess = auto() |
| Total = auto() |
| Size = auto() |
| |
| def display_name(self): |
| return ("NPU", "SRAM Access", "DRAM Access", "On-chip Flash Access", "Off-chip Flash Access", "Total", "Size",)[ |
| self.value |
| ] |
| |
| def identifier_name(self): |
| return ("npu", "sram_access", "dram_access", "on_chip_flash_access", "off_chip_flash_access", "total", "size",)[ |
| self.value |
| ] |
| |
| @staticmethod |
| def all(): |
| return ( |
| PassCycles.Npu, |
| PassCycles.SramAccess, |
| PassCycles.DramAccess, |
| PassCycles.OnChipFlashAccess, |
| PassCycles.OffChipFlashAccess, |
| PassCycles.Total, |
| ) |
| |
| |
| def make_bandwidth_array(): |
| return np.zeros((MemArea.Size, TensorPurpose.Size, BandwidthDirection.Size)) |
| |
| |
| def make_cycles_array(): |
| return np.zeros(PassCycles.Size) |
| |
| |
| def make_metrics_arrays(): |
| return (make_bandwidth_array(), 0, make_cycles_array()) |
| |
| |
| def get_ifm_block_depth(npu_block_type, ifm_depth, ifm_elemwidth, block_traversal, ofm_blk_depth): |
| ifm_blk_depth = ofm_blk_depth |
| |
| if npu_block_type in (NpuBlockType.ConvolutionMxN, NpuBlockType.VectorProduct, NpuBlockType.ReduceSum): |
| if ifm_elemwidth == 16 or block_traversal == TensorBlockTraversal.PartKernelFirst: |
| ifm_blk_depth = 16 |
| elif ifm_elemwidth == 8: |
| ifm_blk_depth = 32 |
| else: |
| ifm_blk_depth = 8 |
| |
| return min(ifm_depth, ifm_blk_depth) |
| |
| |
| def get_minimal_cmd_cycles( |
| arch, ifm_tensor, ofm_tensor, ifm_blk: Block, ofm_blk: Block, output_cycles, ifm_shape4D, ofm_shape4D, dpu_cycles=0 |
| ): |
| ifm_tens_blk = Tensor((1, ifm_blk.height, ifm_blk.width, ifm_blk.depth), ifm_tensor.dtype, "ifm_blk") |
| ofm_tens_blk = Tensor((1, ofm_blk.height, ofm_blk.width, ofm_blk.depth), ofm_tensor.dtype, "ofm_blk") |
| cycles_ifm_blk = ( |
| estimate_memory_transfer_efficiency( |
| arch, ifm_tensor.mem_area, BandwidthDirection.Read, ifm_tens_blk, ifm_blk, shape4D=ifm_shape4D |
| ) |
| / arch.memory_bandwidths_per_cycle[ifm_tensor.mem_area] |
| ) |
| cycles_ofm_blk = ( |
| estimate_memory_transfer_efficiency( |
| arch, ofm_tensor.mem_area, BandwidthDirection.Write, ofm_tens_blk, ofm_blk, shape4D=ofm_shape4D |
| ) |
| / arch.memory_bandwidths_per_cycle[ofm_tensor.mem_area] |
| ) |
| return ( |
| arch.memory_latency[ifm_tensor.mem_area][BandwidthDirection.Read] |
| + cycles_ifm_blk |
| + dpu_cycles |
| + output_cycles |
| + arch.memory_latency[ofm_tensor.mem_area][BandwidthDirection.Write] |
| + cycles_ofm_blk |
| ) / 4 |
| |
| |
| def estimate_output_cycles( |
| arch, |
| npu_block_type, |
| primary_op, |
| num_elems, |
| ifm_tensor, |
| ofm_tensor, |
| use_acc_40bits=False, |
| ifm2_tensor=None, |
| block_config: Block = None, |
| ): |
| faf = None if primary_op.activation is None else primary_op.activation.op_type |
| if npu_block_type == NpuBlockType.ElementWise and ifm_tensor.dtype == DataType.int32: |
| if ifm2_tensor is None: |
| # Unary op |
| output_perf_index = 0 |
| else: |
| # Binary op |
| output_perf_index = 1 |
| elif primary_op.type == Op.Mul and ofm_tensor.dtype == DataType.int32: |
| output_perf_index = 2 |
| elif primary_op.type == Op.Mul or ( |
| npu_block_type |
| in ( |
| NpuBlockType.ConvolutionMxN, |
| NpuBlockType.ConvolutionDepthWise, |
| NpuBlockType.Pooling, |
| NpuBlockType.ReduceSum, |
| NpuBlockType.VectorProduct, |
| ) |
| and use_acc_40bits |
| ): |
| output_perf_index = 3 |
| elif primary_op.type in (Op.Add, Op.Sub): |
| input_scale = ifm_tensor.quantization.scale_f32 |
| input2_scale = ifm2_tensor.quantization.scale_f32 |
| output_scale = ofm_tensor.quantization.scale_f32 |
| |
| if "resizebilinear" in primary_op.attrs: |
| output_scale = input2_scale |
| |
| if None in (input_scale, input2_scale, output_scale) or input_scale == input2_scale: |
| # Simple Add/Sub |
| output_perf_index = 4 |
| else: |
| # Advanced Add/Sub |
| output_perf_index = 5 |
| elif primary_op.type.is_maxpool_op(): |
| output_perf_index = 6 |
| else: |
| output_perf_index = 7 |
| |
| if faf in (Op.Sigmoid, Op.Tanh, Op.LUT): |
| activation_perf_index = 0 |
| elif faf in (Op.Relu, Op.Relu6, Op.ReluN1To1): |
| activation_perf_index = 1 |
| else: |
| activation_perf_index = 2 |
| |
| cycle_per_elem = max( |
| arch.output_cycles_per_elem[output_perf_index], arch.activation_cycles_per_elem[activation_perf_index] |
| ) |
| |
| if primary_op.type.is_elementwise_op() and block_config is not None: |
| num_elems_blk = block_config.width * block_config.height * block_config.depth |
| cycle_cmd = get_minimal_cmd_cycles( |
| arch, |
| ifm_tensor, |
| ofm_tensor, |
| block_config, |
| block_config, |
| num_elems_blk * cycle_per_elem, |
| primary_op.ifm_shapes[0], |
| primary_op.ofm_shapes[0], |
| ) |
| cycle_per_elem = max(cycle_per_elem, cycle_cmd / num_elems_blk) |
| |
| return num_elems * cycle_per_elem |
| |
| |
| def estimate_conv_pooling_cycles( |
| arch, |
| npu_block_type, |
| primary_op, |
| ifm_block: Block, |
| ofm_block: Block, |
| block_traversal, |
| kernel_dims, |
| ifm_tensor, |
| ofm_tensor, |
| scale_tensor=None, |
| ): |
| ofm_ublock = Block(arch.config.ofm_ublock.width, arch.config.ofm_ublock.height, arch.config.ofm_ublock.depth) |
| ifm_tens_shape = primary_op.ifm_shapes[0] |
| ofm_tens_shape = primary_op.ofm_shapes[0] |
| |
| if ( |
| arch.config.ofm_ublock.height == 2 |
| and npu_block_type |
| in (NpuBlockType.ConvolutionMxN, NpuBlockType.ConvolutionDepthWise, NpuBlockType.VectorProduct) |
| and ofm_tens_shape.height == 1 |
| # Optimisation only applies for even width tensors |
| and ofm_tens_shape.width % 2 == 0 |
| and kernel_dims[0] == 1 |
| ): |
| ofm_ublock.width = 4 |
| ofm_ublock.height = 1 |
| ofm_block.height = 1 |
| |
| num_ublk_x = numeric_util.round_up_divide(ofm_block.width, ofm_ublock.width) |
| num_ublk_y = ofm_block.height // ofm_ublock.height |
| num_ublk_xy = num_ublk_x * num_ublk_y |
| num_ublk_z = ofm_block.depth // ofm_ublock.depth |
| num_ofm_blk = 0 |
| total_cycles = 0 |
| num_elems_blk = ofm_block.width * ofm_block.height * ofm_block.depth |
| use_acc_40bits = is_acc_40bits_used(npu_block_type, ifm_tensor, ofm_tensor) |
| |
| sub_kernel_limits = arch.sub_kernel_limits[npu_block_type] |
| n_sub_kernels_y = numeric_util.round_up_divide(kernel_dims[0], sub_kernel_limits[0]) |
| n_sub_kernels_x = numeric_util.round_up_divide(kernel_dims[1], sub_kernel_limits[1]) |
| sub_kernel_x = [ |
| min((kernel_dims[1] - i * sub_kernel_limits[1]), sub_kernel_limits[1]) for i in range(n_sub_kernels_x) |
| ] |
| sub_kernel_y = [ |
| min((kernel_dims[0] - i * sub_kernel_limits[0]), sub_kernel_limits[0]) for i in range(n_sub_kernels_y) |
| ] |
| sub_kernel_size = (x * y for y in sub_kernel_y for x in sub_kernel_x) |
| |
| cycles_dpu_blk = 0 |
| cycles_wb = 32 * ofm_ublock.depth // 8 |
| |
| for num_kernel_elems in sub_kernel_size: |
| if npu_block_type == NpuBlockType.Pooling: |
| num_kernel_steps = 1 |
| cycles = max(4, num_kernel_elems) * num_ublk_xy * num_ublk_z |
| if ifm_tensor.dtype.size_in_bits() == 16 and arch.accelerator_config != Accelerator.Ethos_U55_32: |
| cycles *= 2 |
| elif npu_block_type == NpuBlockType.ConvolutionDepthWise: |
| cycles = 4 * num_ublk_xy |
| if ifm_tensor.dtype.size_in_bits() == 16: |
| cycles *= 2 |
| num_kernel_steps = numeric_util.round_up_divide(num_kernel_elems, 4) |
| cycles = max(cycles_wb, cycles) * num_kernel_steps * num_ublk_z |
| elif ( |
| (npu_block_type == NpuBlockType.ConvolutionMxN and block_traversal != TensorBlockTraversal.PartKernelFirst) |
| or npu_block_type == NpuBlockType.VectorProduct |
| or npu_block_type == NpuBlockType.ReduceSum |
| ): |
| num_kernel_steps = num_kernel_elems |
| cycles = max(cycles_wb, 4 * num_ublk_xy) * num_kernel_steps * num_ublk_z |
| else: |
| assert block_traversal == TensorBlockTraversal.PartKernelFirst |
| divider = 2 if ifm_tensor.dtype.size_in_bits() == 16 else 4 |
| num_kernel_steps = numeric_util.round_up_divide(num_kernel_elems, divider) |
| cycles = max(cycles_wb, 4 * num_ublk_xy) * ( |
| num_kernel_steps * numeric_util.round_up_divide(ifm_block.depth, 8) * num_ublk_z |
| ) |
| |
| delay_cycles = 0 |
| if arch.accelerator_config is Accelerator.Ethos_U55_32: |
| delay = 7 if use_acc_40bits else 3 |
| if num_ublk_x == 1 and num_ublk_y == 1: |
| if num_ublk_z == 1: |
| delay_cycles = delay * num_kernel_steps |
| elif num_kernel_steps > 1: |
| delay_cycles = delay * (num_kernel_steps - 1) * num_ublk_z |
| if (num_ublk_x == 1 or num_ublk_y == 1) and num_ublk_z > 1 and use_acc_40bits: |
| delay_cycles += delay * num_ublk_z |
| else: |
| delay = ( |
| 3 |
| if use_acc_40bits and arch.accelerator_config in (Accelerator.Ethos_U55_64, Accelerator.Ethos_U55_128) |
| else 2 |
| ) |
| if num_ublk_x == 1 and num_ublk_y == 1: |
| if num_ublk_z == 1: |
| delay_cycles = delay * num_kernel_steps |
| elif num_kernel_steps > 1: |
| delay_cycles = delay * (num_kernel_steps - 1) * num_ublk_z |
| |
| if npu_block_type == NpuBlockType.ConvolutionMxN and block_traversal == TensorBlockTraversal.PartKernelFirst: |
| delay_cycles *= numeric_util.round_up_divide(ifm_block.depth, 8) |
| |
| cycles_dpu_blk += cycles |
| cycles_dpu_blk += delay_cycles |
| |
| if npu_block_type in (NpuBlockType.ConvolutionMxN, NpuBlockType.VectorProduct, NpuBlockType.ReduceSum): |
| cycles_dpu_blk *= numeric_util.round_up_divide(ifm_tens_shape.depth, ifm_block.depth) |
| |
| cycles_dpu_blk /= arch.ncores |
| |
| num_ofm_blk = ( |
| numeric_util.round_up_divide(ofm_tens_shape.height, ofm_block.height) |
| * numeric_util.round_up_divide(ofm_tens_shape.width, ofm_block.width) |
| * numeric_util.round_up_divide(ofm_tens_shape.depth, ofm_block.depth) |
| ) |
| |
| cycles_output_blk = estimate_output_cycles( |
| arch, npu_block_type, primary_op, num_elems_blk, ifm_tensor, ofm_tensor, use_acc_40bits |
| ) |
| |
| if scale_tensor: |
| cycles_bias_blk = ( |
| 10 |
| * min(ofm_block.depth, ofm_tens_shape.depth) |
| * arch.memory_latency[scale_tensor.mem_area][BandwidthDirection.Read] |
| / 256 |
| ) |
| cycles_output_blk = max(cycles_output_blk, cycles_bias_blk) |
| |
| cycles_cmd = get_minimal_cmd_cycles( |
| arch, |
| ifm_tensor, |
| ofm_tensor, |
| ifm_block, |
| ofm_block, |
| cycles_dpu_blk, |
| ifm_tens_shape, |
| ofm_tens_shape, |
| cycles_output_blk, |
| ) |
| cycles_dpu_blk = max(cycles_dpu_blk, cycles_cmd) |
| cycles_output_blk = max(cycles_output_blk, cycles_cmd) |
| |
| if cycles_dpu_blk > cycles_output_blk: |
| total_cycles = cycles_dpu_blk * num_ofm_blk + cycles_output_blk |
| else: |
| total_cycles = cycles_output_blk * num_ofm_blk + cycles_dpu_blk |
| |
| return total_cycles |
| |
| |
| def estimate_memory_transfer_efficiency( |
| arch, mem_area, direction, tensor, block_size: Block, replace_bw=None, shape4D=None |
| ): |
| if tensor.format not in (TensorFormat.NHWC, TensorFormat.NHCWB16): |
| return tensor.bandwidth() if replace_bw is None else replace_bw |
| |
| # Estimate memory transfer efficiency by calculating the burst length |
| # this is related to data format, block shape, and tensor shape, etc. |
| burst_len = 0 |
| elem_size = tensor.dtype.size_in_bytes() |
| is_ifm = direction == BandwidthDirection.Read |
| tens = tensor.clone() |
| |
| if not tensor.needs_linear_format: |
| tens.set_format(TensorFormat.NHCWB16, arch) |
| strides = tens.get_strides(shape4D=shape4D) |
| |
| if tens.format == TensorFormat.NHCWB16: |
| if strides[1] == block_size.depth: |
| burst_len = elem_size * block_size.depth * block_size.width |
| elif is_ifm: |
| burst_len = 16 * elem_size * block_size.width |
| else: |
| burst_len = 16 * elem_size * block_size.width * arch.ncores |
| else: |
| assert tens.format == TensorFormat.NHWC |
| if is_ifm: |
| if strides[3] == block_size.depth: |
| burst_len = elem_size * block_size.depth * block_size.width |
| else: |
| burst_len = elem_size * block_size.depth |
| else: |
| if block_size.depth <= 16 and strides[3] == block_size.depth: |
| burst_len = elem_size * block_size.depth * block_size.width |
| else: |
| burst_len = min(64, 16 * elem_size * arch.ncores, block_size.depth * elem_size) |
| |
| burst_len = min(arch.memory_burst_length[mem_area], burst_len) |
| bw = tens.bandwidth() if replace_bw is None else replace_bw |
| |
| return bw * (arch.memory_burst_length[mem_area] / burst_len) |
| |
| |
| def performance_metrics_for_pass(arch, ps, block_config=None, rewrite_list=None, force_outputs_to_fast_storage=False): |
| if block_config is None: |
| block_config = ps.block_config |
| bws = make_bandwidth_array() |
| scaled_bws = make_bandwidth_array() # scaled bw with memory transfer efficiency |
| macs = 0 |
| cycles = make_cycles_array() |
| ifm_read_multiple = 1 |
| weight_read_multiple = 0 |
| |
| if ps.placement in (PassPlacement.MemoryOnly, PassPlacement.StartupInit): |
| return bws, macs, cycles, ifm_read_multiple, weight_read_multiple # nothing real happening in this pass |
| |
| explicit_padding = (0, 0, 0, 0) |
| primary_op = ps.primary_op |
| replacement_read_bws = {} |
| ofm_block = Block(block_config[1], block_config[0], block_config[3]) |
| ifm_block = Block(block_config[1], block_config[0], block_config[3]) |
| |
| if ps.placement == PassPlacement.Npu and primary_op: |
| explicit_padding = primary_op.attrs.get("explicit_padding", explicit_padding) |
| assert primary_op.type.npu_block_type == ps.npu_block_type |
| npu_block_type = primary_op.type.npu_block_type |
| |
| ifm_tensor, _, weight_tensor, ofm_tensor = ps.get_primary_op_ifm_ifm2_weights_ofm() |
| ifm_tensor_shape = ps.primary_op.ifm_shapes[0] |
| ofm_tensor_shape = ps.primary_op.ofm_shapes[0] |
| ofm_block.width = min(ofm_block.width, ofm_tensor_shape.width) |
| ofm_block.height = min(ofm_block.height, ofm_tensor_shape.height) |
| ofm_block.depth = min(ofm_block.depth, ofm_tensor_shape.depth) |
| |
| if npu_block_type == NpuBlockType.ReduceSum: |
| block_traversal = TensorBlockTraversal.DepthFirst |
| elif npu_block_type in ( |
| NpuBlockType.ConvolutionMxN, |
| NpuBlockType.ConvolutionDepthWise, |
| NpuBlockType.VectorProduct, |
| ): |
| block_traversal = weight_tensor.block_traversal |
| else: |
| block_traversal = TensorBlockTraversal.Default |
| ifm_block_depth = get_ifm_block_depth( |
| npu_block_type, ifm_tensor_shape.depth, ifm_tensor.dtype.size_in_bits(), block_traversal, ofm_block.depth |
| ) |
| ifm_block = arch.get_ifm_block_size( |
| ifm_block_depth, ofm_block, primary_op.kernel, ifm_resampling_mode=ifm_tensor.resampling_mode |
| ) |
| ifm_block.width = min(ifm_block.width, ifm_tensor_shape.width) |
| ifm_block.height = min(ifm_block.height, ifm_tensor_shape.height) |
| |
| if npu_block_type in ( |
| NpuBlockType.ConvolutionMxN, |
| NpuBlockType.ConvolutionDepthWise, |
| NpuBlockType.VectorProduct, |
| NpuBlockType.Pooling, |
| NpuBlockType.ReduceSum, |
| ): |
| # extent the ifm to full dimension |
| |
| batch_size = ifm_tensor_shape.batch |
| |
| # add in padding, height += top and bottom, width += left and right |
| ifm_tensor_shape = ifm_tensor_shape.add( |
| 0, explicit_padding[0] + explicit_padding[2], explicit_padding[1] + explicit_padding[3], 0 |
| ) |
| |
| if npu_block_type != NpuBlockType.Pooling: |
| if npu_block_type == NpuBlockType.ReduceSum: |
| weight_tensor_shape = [1, 1, ifm_tensor.shape[3], ofm_tensor.shape[3]] |
| weight_tensor_bandwidth_shape = [0] * 4 |
| weight_tensor_element_size = 0 |
| weight_tensor_bandwidth_compression_scale = 0.0 |
| else: |
| # For Vector product, weight format of IO is extended to HWIO, with H=W=1 |
| weight_tensor_shape = numeric_util.full_shape(4, weight_tensor.shape, 1) |
| weight_tensor_bandwidth_shape = numeric_util.full_shape(4, weight_tensor.bandwidth_shape, 1) |
| weight_tensor_element_size = weight_tensor.element_size() |
| weight_tensor_bandwidth_compression_scale = weight_tensor.bandwidth_compression_scale |
| |
| nn_ops = ( |
| int(ofm_tensor_shape.batch) |
| * int(ofm_tensor_shape.height) |
| * int(ofm_tensor_shape.width) |
| * int(weight_tensor_shape[0]) |
| * int(weight_tensor_shape[1]) |
| * int(weight_tensor_shape[2]) |
| * int(weight_tensor_shape[3]) |
| ) |
| else: |
| weight_tensor_shape = [ |
| *primary_op.get_kernel_size(), |
| 1, |
| ifm_tensor_shape.depth, |
| ] |
| weight_tensor_bandwidth_shape = weight_tensor_shape |
| weight_tensor_element_size = 0 |
| weight_tensor_bandwidth_compression_scale = 0.0 |
| nn_ops = 0 # pooling doesn't count as NN ops |
| |
| kernel_dims = weight_tensor_shape[:2] |
| |
| sub_kernel_limits = arch.sub_kernel_limits[npu_block_type] |
| # count the sub kernels; the IFM block needs to be refetched for each of them |
| n_sub_kernels_y = numeric_util.round_up_divide(kernel_dims[0], sub_kernel_limits[0]) |
| n_sub_kernels_x = numeric_util.round_up_divide(kernel_dims[1], sub_kernel_limits[1]) |
| n_sub_kernels = n_sub_kernels_y * n_sub_kernels_x |
| |
| n_full_depth_stages = numeric_util.round_up_divide(weight_tensor_bandwidth_shape[3], ofm_block.depth) |
| if npu_block_type in (NpuBlockType.ConvolutionDepthWise, NpuBlockType.Pooling): |
| n_full_depth_stages = 1 # force to no reread |
| |
| ifm_read_multiple = n_sub_kernels * n_full_depth_stages |
| replacement_read_bws[ifm_tensor] = ifm_tensor.bandwidth() * ifm_read_multiple |
| |
| weight_read_multiple = numeric_util.round_up_divide( |
| ofm_tensor_shape.height, ofm_block.height |
| ) * numeric_util.round_up_divide(ofm_tensor_shape.width, ofm_block.width) |
| replacement_read_bws[weight_tensor] = ( |
| batch_size |
| * shape_num_elements(weight_tensor_bandwidth_shape) |
| * weight_tensor_element_size |
| * weight_tensor_bandwidth_compression_scale |
| * weight_read_multiple |
| ) |
| |
| macs += nn_ops |
| cycles[PassCycles.Npu] = estimate_conv_pooling_cycles( |
| arch, |
| npu_block_type, |
| primary_op, |
| ifm_block, |
| ofm_block, |
| block_traversal, |
| kernel_dims, |
| ifm_tensor, |
| ofm_tensor, |
| ps.scale_tensor, |
| ) |
| elif npu_block_type == NpuBlockType.ElementWise: |
| # Work out how many elements we have and calculate performance. |
| cycles[PassCycles.Npu] = estimate_output_cycles( |
| arch, |
| npu_block_type, |
| primary_op, |
| ofm_tensor.elements(), |
| ps.ifm_tensor, |
| ps.ofm_tensor, |
| None, |
| ps.ifm2_tensor, |
| ofm_block, |
| ) |
| |
| prev_npu_pass = next((npu_ps for npu_ps in ps.dag_predecessors if npu_ps.placement is PassPlacement.Npu), None) |
| if prev_npu_pass is None: |
| # cycles for DMA ops in first pass |
| dma_ops = (op for op in ps.ops if op.type == Op.DMA) |
| for dma_op in dma_ops: |
| mem_area = dma_op.attrs["source"] |
| for tens in dma_op.inputs: |
| cycles[PassCycles.Npu] += tens.storage_size() / arch.memory_bandwidths_per_cycle[mem_area] |
| |
| if rewrite_list is not None: |
| # apply the desired rewrites |
| for rewrite_op, tens, _, _, _, ps_to_rewrite in rewrite_list: |
| if ps != ps_to_rewrite: |
| continue |
| if rewrite_op == SchedulerRewrite.Nop: |
| pass # these are fine, no bandwidth changes |
| elif rewrite_op in (SchedulerRewrite.ChangeTensorSubPurpose,): |
| bws[arch.fast_storage_mem_area][tens.purpose][BandwidthDirection.Read] += replacement_read_bws[tens] |
| if tens.purpose == TensorPurpose.FeatureMap: |
| scaled_bw = estimate_memory_transfer_efficiency( |
| arch, |
| arch.fast_storage_mem_area, |
| BandwidthDirection.Read, |
| tens, |
| ifm_block, |
| replacement_read_bws[tens], |
| ) |
| else: |
| scaled_bw = replacement_read_bws[tens] |
| scaled_bws[arch.fast_storage_mem_area][tens.purpose][BandwidthDirection.Read] += scaled_bw |
| replacement_read_bws[tens] = 0 |
| |
| for tens in ps.outputs: |
| if force_outputs_to_fast_storage: |
| bws[arch.fast_storage_mem_area][tens.purpose][BandwidthDirection.Write] += tens.bandwidth() |
| scaled_bws[arch.fast_storage_mem_area][tens.purpose][ |
| BandwidthDirection.Write |
| ] += estimate_memory_transfer_efficiency( |
| arch, arch.fast_storage_mem_area, BandwidthDirection.Write, tens, ofm_block, shape4D=ps.ofm_shapes[0], |
| ) |
| else: |
| bws[tens.mem_area][tens.purpose][BandwidthDirection.Write] += tens.bandwidth() |
| scaled_bws[tens.mem_area][tens.purpose][BandwidthDirection.Write] += estimate_memory_transfer_efficiency( |
| arch, tens.mem_area, BandwidthDirection.Write, tens, ofm_block, shape4D=ps.ofm_shapes[0] |
| ) |
| |
| for tens in ps.intermediates: |
| bws[tens.mem_area][tens.purpose][BandwidthDirection.Write] += tens.bandwidth() |
| scaled_bws[tens.mem_area][tens.purpose][BandwidthDirection.Write] += tens.bandwidth() |
| |
| if tens in replacement_read_bws: |
| bw = replacement_read_bws[tens] |
| else: |
| bw = tens.bandwidth() |
| |
| bws[tens.mem_area][tens.purpose][BandwidthDirection.Read] += bw |
| scaled_bws[tens.mem_area][tens.purpose][BandwidthDirection.Read] += bw |
| |
| for tens in ps.inputs: |
| if tens in replacement_read_bws: |
| bw = replacement_read_bws[tens] |
| else: |
| bw = tens.bandwidth() |
| |
| bws[tens.mem_area][tens.purpose][BandwidthDirection.Read] += bw |
| |
| op_shape = None |
| if ps.placement == PassPlacement.Npu and primary_op: |
| if tens == ps.ifm_tensor: |
| op_shape = ps.ifm_shapes[0] |
| elif tens == ps.ifm2_tensor: |
| op_shape = ps.ifm_shapes[1] |
| |
| scaled_bws[tens.mem_area][tens.purpose][BandwidthDirection.Read] += estimate_memory_transfer_efficiency( |
| arch, tens.mem_area, BandwidthDirection.Read, tens, ifm_block, bw, op_shape |
| ) |
| |
| # quick build access counts for only current pass, even though these aren't the final numbers |
| update_summary_cycles(arch, scaled_bws, cycles) |
| |
| return bws, macs, cycles, ifm_read_multiple, weight_read_multiple |
| |
| |
| def update_summary_cycles(arch, bws, cycles): |
| cycles[PassCycles.SramAccess] = np.sum(bws[MemArea.Sram]) / arch.memory_bandwidths_per_cycle[MemArea.Sram] |
| cycles[PassCycles.DramAccess] = np.sum(bws[MemArea.Dram]) / arch.memory_bandwidths_per_cycle[MemArea.Dram] |
| cycles[PassCycles.OnChipFlashAccess] = ( |
| np.sum(bws[MemArea.OnChipFlash]) / arch.memory_bandwidths_per_cycle[MemArea.OnChipFlash] |
| ) |
| cycles[PassCycles.OffChipFlashAccess] = ( |
| np.sum(bws[MemArea.OffChipFlash]) / arch.memory_bandwidths_per_cycle[MemArea.OffChipFlash] |
| ) |
| |
| cycles[PassCycles.Total] = np.max(cycles[: PassCycles.Total]) |
| return cycles |
| |
| |
| def collate_stats_for_cascaded_pass(arch, bws, macs, cycles): |
| return bws, macs, cycles |
| |
| |
| def performance_for_cascaded_pass(arch, cps): |
| total_bws = make_bandwidth_array() |
| total_macs = 0 |
| total_cycles = make_cycles_array() |
| |
| for ps in cps.passes: |
| bws, macs, cycles, _, _ = performance_metrics_for_pass(arch, ps) |
| ps.bandwidths = bws |
| ps.macs = macs |
| ps.cycles = cycles |
| total_bws += bws |
| total_macs += macs |
| total_cycles += cycles |
| |
| bws, macs, cycles = collate_stats_for_cascaded_pass(arch, total_bws, total_macs, total_cycles) |
| cps.bandwidths = bws |
| cps.macs = macs |
| cps.cycles = cycles |
| return bws, macs, cycles |
| |
| |
| def calc_performance_for_network(nng, arch): |
| total_bws = make_bandwidth_array() |
| total_macs = 0 |
| total_cycles = np.zeros(PassCycles.Size) |
| |
| for sg in nng.subgraphs: |
| for cps in sg.cascaded_passes: |
| bws, macs, cycles = performance_for_cascaded_pass(arch, cps) |
| total_bws += bws |
| total_macs += macs |
| total_cycles += cycles |
| |
| nng.bandwidths = total_bws |
| nng.macs = total_macs |
| nng.cycles = total_cycles |