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a3e860f0-98ed-4845-9aee-cccd01fd9b5b.txt
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a3e860f0-98ed-4845-9aee-cccd01fd9b5b.txt
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import os
import sys
with open(sys.argv[0]) as f:
code = f.read() # read the code of this file ASAP, for logging
import uuid
import time
import contextlib
from dataclasses import dataclass
from pathlib import Path
import torch
from torch import nn
import torch.nn.functional as F
import torch.distributed as dist
import torch._inductor.config as config
from torch.nn.parallel import DistributedDataParallel as DDP
from torch.nn.attention.flex_attention import BlockMask, flex_attention #KoszarskyB
# -----------------------------------------------------------------------------
# Muon optimizer
@torch.compile
def zeropower_via_newtonschulz5(G, steps=10, eps=1e-7):
"""
Newton-Schulz iteration to compute the zeroth power / orthogonalization of G. We opt to use a
quintic iteration whose coefficients are selected to maximize the slope at zero. For the purpose
of minimizing steps, it turns out to be empirically effective to keep increasing the slope at
zero even beyond the point where the iteration no longer converges all the way to one everywhere
on the interval. This iteration therefore does not produce UV^T but rather something like US'V^T
where S' is diagonal with S_{ii}' ~ Uniform(0.5, 1.5), which turns out not to hurt model
performance at all relative to UV^T, where USV^T = G is the SVD.
"""
assert len(G.shape) == 2
a, b, c = (3.4445, -4.7750, 2.0315)
X = G.bfloat16()
X /= (X.norm() + eps) # ensure top singular value <= 1
if G.size(0) > G.size(1):
X = X.T
for _ in range(steps):
A = X @ X.T
B = b * A + c * A @ A # adapted from suggestion by @jxbz, @leloykun, and @YouJiacheng
X = a * X + B @ X
if G.size(0) > G.size(1):
X = X.T
return X
class Muon(torch.optim.Optimizer):
"""
Muon - MomentUm Orthogonalized by Newton-schulz
Muon internally runs standard SGD-momentum, and then performs an orthogonalization post-
processing step, in which each 2D parameter's update is replaced with the nearest orthogonal
matrix. To efficiently orthogonalize each update, we use a Newton-Schulz iteration, which has
the advantage that it can be stably run in bfloat16 on the GPU.
Some warnings:
- This optimizer assumes that all parameters passed in are 2D.
- It should not be used for the embedding layer, the final fully connected layer, or any {0,1}-D
parameters; those should all be optimized by a standard method (e.g., AdamW).
- To use it with 4D convolutional filters, it works well to just flatten their last 3 dimensions.
- We believe it is unlikely to work well for training with small batch size.
- We believe it may not work well for finetuning pretrained models, but we haven't tested this.
- We have not yet tried this optimizer for training scenarios larger than NanoGPT (124M).
Arguments:
lr: The learning rate used by the internal SGD.
momentum: The momentum used by the internal SGD.
nesterov: Whether to use Nesterov-style momentum in the internal SGD. (recommended)
ns_steps: The number of Newton-Schulz iteration steps to use.
"""
def __init__(self, params, lr=0.02, momentum=0.95, nesterov=True, ns_steps=5):
self.world_size = int(os.environ['WORLD_SIZE'])
self.rank = int(os.environ['RANK'])
defaults = dict(lr=lr, momentum=momentum, nesterov=nesterov, ns_steps=ns_steps)
params = list(params)
assert all(isinstance(p, torch.Tensor) for p in params)
sizes = {p.numel() for p in params}
param_groups = [
{
'params': [p for p in params if p.numel() == size],
'update_buffer': [
torch.empty(size, device='cuda', dtype=torch.bfloat16)
for _ in range(self.world_size)
],
}
for size in sizes
]
super().__init__(param_groups, defaults)
def step(self):
for group in self.param_groups:
lr = group['lr']
momentum = group['momentum']
nesterov = group['nesterov']
ns_steps = group['ns_steps']
update_buffers = group['update_buffer']
# generate weight updates in distributed fashion
params = group['params']
assert len(params) % self.world_size == 0
handle = None
params_world = None
def update_prev():
if params_world is None:
return
assert handle is not None
handle.wait()
for p_world, g_world in zip(params_world, update_buffers):
p_world.data.add_(
g_world.view_as(p_world),
alpha=-lr * max(1, p_world.size(0) / p_world.size(1)) ** 0.5,
)
for base_i in range(len(params))[::self.world_size]:
p = params[base_i + self.rank]
g = p.grad
assert g is not None
state = self.state[p]
if 'momentum_buffer' not in state:
state['momentum_buffer'] = torch.zeros_like(g)
buf = state['momentum_buffer']
buf.lerp_(g, 1 - momentum)
g = g.lerp_(buf, momentum) if nesterov else buf
g = zeropower_via_newtonschulz5(g, steps=ns_steps).flatten()
update_prev()
handle = dist.all_gather(update_buffers, g, async_op=True)
params_world = params[base_i : base_i + self.world_size]
update_prev()
# -----------------------------------------------------------------------------
# PyTorch nn.Module definitions for the GPT-2 model
def norm(x):
return F.rms_norm(x, (x.size(-1),))
class CastedLinear(nn.Linear):
def __init__(self, in_features, out_features):
super().__init__(in_features, out_features, bias=False)
def forward(self, x):
return F.linear(x, self.weight.to(x.dtype))
class Rotary(torch.nn.Module):
def __init__(self, dim, base=10000):
super().__init__()
self.register_buffer('inv_freq', (1 / base) ** (torch.arange(0, dim, 2) / dim))
self.seq_len_cached = None
self.cos_cached = None
self.sin_cached = None
def forward(self, x):
seq_len = x.shape[1]
if seq_len != self.seq_len_cached:
t = torch.arange(seq_len, device=x.device)
freqs = torch.outer(t, self.inv_freq)
self.seq_len_cached = seq_len
self.cos_cached = freqs.cos()
self.sin_cached = freqs.sin()
cos, sin = self.cos_cached[None, :, None, :], self.sin_cached[None, :, None, :]
# apply_rotary_emb(x, cos, sin)
x1, x2 = x.chunk(2, dim=3)
y1 = x1 * cos + x2 * sin
y2 = x1 * (-sin) + x2 * cos
return torch.cat((y1, y2), 3).type_as(x)
class CausalSelfAttention(nn.Module):
def __init__(self, dim, num_heads):
super().__init__()
assert dim % num_heads == 0
self.num_heads = num_heads
self.c_q = CastedLinear(dim, dim)
self.c_k = CastedLinear(dim, dim)
self.c_v = CastedLinear(dim, dim)
self.lambdas = nn.Parameter(torch.tensor([0.5, 0.5]))
self.rotary = Rotary(dim // num_heads) # dim // num_heads = head_dim
self.c_proj = CastedLinear(dim, dim)
self.c_proj.weight.data.zero_() # zero init suggested by @Grad62304977
def forward(self, x, vi, block_mask):
B, T = x.size(0), x.size(1) # batch size, sequence length
assert B == 1, "Must use batch size = 1 for FlexAttention"
q = self.c_q(x).view(B, T, self.num_heads, -1)
k = self.c_k(x).view(B, T, self.num_heads, -1)
v = self.c_v(x).view(B, T, self.num_heads, -1)
v = self.lambdas[0] * v + self.lambdas[1] * vi.view_as(v) # @KoszarskyB & @Grad62304977
q, k = norm(q), norm(k) # QK norm @Grad62304977
q, k = self.rotary(q), self.rotary(k)
y = flex_attention(q.transpose(1, 2), k.transpose(1, 2), v.transpose(1, 2), block_mask=block_mask, enable_gqa=True)
y = y.transpose(1, 2).contiguous().view_as(x) # re-assemble all head outputs side by side
y = self.c_proj(y)
return y
class MLP(nn.Module):
def __init__(self, dim):
super().__init__()
self.c_fc = CastedLinear(dim, 4 * dim)
self.c_proj = CastedLinear(4 * dim, dim)
self.c_proj.weight.data.zero_() # zero init suggested by @Grad62304977
def forward(self, x):
x = self.c_fc(x)
x = F.relu(x).square() # https://arxiv.org/abs/2109.08668v2; ~1-2% better than GELU; suggested by @SKYLINEZ007 and @Grad62304977
x = self.c_proj(x)
return x
class Block(nn.Module):
def __init__(self, config):
super().__init__()
self.attn = CausalSelfAttention(config.model_dim, config.num_heads)
self.mlp = MLP(config.model_dim)
self.lambdas = nn.Parameter(torch.tensor([1., 0.]))
def forward(self, x, vi, x0, block_mask):
x = self.lambdas[0] * x + self.lambdas[1] * x0
x = x + self.attn(norm(x), vi, block_mask)
x = x + self.mlp(norm(x))
return x
class ValueEmbedding(nn.Module):
def __init__(self, config: "GPTConfig"):
super().__init__()
self.__setattr__
self.embed = nn.ModuleList([
nn.Embedding(config.vocab_size, config.model_dim)
for _ in range(6)
])
def forward(self, inputs) -> "list[torch.Tensor]":
ve = [emb(inputs) for emb in self.embed]
ve += reversed(ve)
return ve
# -----------------------------------------------------------------------------
# The main GPT-2 model
@dataclass
class GPTConfig:
vocab_size : int = 50304
num_layers : int = 12
num_heads : int = 6 # head dim 128 suggested by @Grad62304977
model_dim : int = 768
class GPT(nn.Module):
def __init__(self, config: GPTConfig):
super().__init__()
self.num_layers = config.num_layers
# U-net design by @brendanh0gan
self.num_encoder_layers = config.num_layers // 2 # Half of the layers for encoder
self.num_decoder_layers = config.num_layers - self.num_encoder_layers # Remaining for decoder
# Add learnable skip connection weights for decoder layers
self.skip_weights = nn.Parameter(torch.ones(self.num_decoder_layers))
self.embed = nn.Embedding(config.vocab_size, config.model_dim)
self.blocks = nn.ModuleList([Block(config) for _ in range(config.num_layers)])
# token value embeddings by @KoszarskyB - inspired by @Grad62304977's value residual learning
# U-net structure on token value embeddings by @leloykun
self.value_embeds = ValueEmbedding(config)
self.lm_head = CastedLinear(config.model_dim, config.vocab_size)
self.lm_head.weight.data.zero_() # @Grad62304977
def forward(
self,
inputs: torch.Tensor,
targets: torch.Tensor,
sliding_window_num_blocks: torch.Tensor,
):
BLOCK_SIZE = 128
assert inputs.ndim == 1
docs = (inputs == 50256).cumsum(0)
docs_low = docs.view(-1, BLOCK_SIZE)[:, 0].contiguous()
docs_high = docs.view(-1, BLOCK_SIZE)[:, -1].contiguous()
def document_causal(b, h, q_idx, kv_idx):
causal_mask = q_idx >= kv_idx
document_mask = docs[q_idx] == docs[kv_idx]
return causal_mask & document_mask
def dense_to_ordered(dense_mask: torch.Tensor):
num_blocks = dense_mask.sum(dim=-1, dtype=torch.int32)
indices = dense_mask.argsort(dim=-1, descending=True, stable=True).to(torch.int32)
return num_blocks[None, None].contiguous(), indices[None, None].contiguous()
def create_doc_swc_block_mask(sliding_window_num_blocks: torch.Tensor):
kv_idx = block_idx = torch.arange(512, dtype=torch.int32, device="cuda")
q_idx = block_idx[:, None]
causal_bm = q_idx >= kv_idx
causal_full_bm = q_idx > kv_idx
window_bm = q_idx - kv_idx < sliding_window_num_blocks
window_full_bm = window_bm
# document_bm = (docs_low[q_idx] <= docs_high[kv_idx]) & (docs_low[kv_idx] <= docs_high[q_idx])
document_bm = (docs_low[:, None] <= docs_high) & (docs_low <= docs_high[:, None])
document_full_bm = (docs_low[:, None] == docs_high) & (docs_low == docs_high[:, None])
nonzero_bm = causal_bm & window_bm & document_bm
full_bm = causal_full_bm & window_full_bm & document_full_bm
kv_num_blocks, kv_indices = dense_to_ordered(nonzero_bm ^ full_bm)
full_kv_num_blocks, full_kv_indices = dense_to_ordered(full_bm)
return BlockMask.from_kv_blocks(
kv_num_blocks,
kv_indices,
full_kv_num_blocks,
full_kv_indices,
BLOCK_SIZE=BLOCK_SIZE,
mask_mod=document_causal,
)
block_mask = create_doc_swc_block_mask(sliding_window_num_blocks)
# forward the GPT model itself
x = self.embed(inputs[None]) # token embeddings of shape (b, t, model_dim)
x = norm(x) # @Grad62304977
x0 = x
ve = self.value_embeds(inputs)
ve_enc, ve_dec = ve[:self.num_encoder_layers], ve[self.num_encoder_layers:]
# Store outputs for U-Net skip connections
skip_connections = []
# Encoder pass - process only the first half of the blocks
for i in range(self.num_encoder_layers):
x = self.blocks[i](x, ve_enc[i], x0, block_mask)
skip_connections.append(x)
# Decoder pass - process the remaining blocks with weighted skip connections
for i in range(self.num_decoder_layers):
x = x + self.skip_weights[i] * skip_connections.pop()
# U-net structure on token value embeddings by @leloykun
x = self.blocks[self.num_encoder_layers + i](x, ve_dec[i], x0, block_mask)
x = norm(x)
logits = self.lm_head(x)
logits = 30 * torch.tanh(logits / 30) # @Grad62304977
logits = logits.float()
loss = F.cross_entropy(logits.view(-1, logits.size(-1)), targets.view(-1))
return loss
# -----------------------------------------------------------------------------
# Our own simple Distributed Data Loader
def _peek_data_shard(file: Path):
# only reads the header, returns header data
# header is 256 int32
header = torch.from_file(f"{file}", False, 256, dtype=torch.int32)
assert header[0] == 20240520, "magic number mismatch in the data .bin file"
assert header[1] == 1, "unsupported version"
return int(header[2]) # number of tokens (claimed)
def _load_data_shard(path: Path, num_tokens):
with path.open("rb", buffering=0) as f:
tokens = torch.empty(num_tokens, dtype=torch.uint16, pin_memory=True)
f.seek(256 * 4)
nbytes = f.readinto(tokens.numpy())
assert nbytes == 2 * num_tokens, "number of tokens read does not match header?"
return tokens
class DistributedDataLoader:
def __init__(self, filename_pattern, seq_len, process_rank, num_processes):
self.process_rank = process_rank
self.num_processes = num_processes
self.seq_len = seq_len
# glob files that match the pattern
self.files = sorted(Path.cwd().glob(filename_pattern))
assert len(self.files) > 0, f"did not find any files that match the pattern {filename_pattern}"
# load and validate all data shards, count number of tokens in total
self.files_num_tokens = [_peek_data_shard(file) for file in self.files]
assert min(self.files_num_tokens) >= num_processes * seq_len + 1
self.total_num_tokens = sum(self.files_num_tokens)
self.reset()
def reset(self):
self.current_shard = -1
self.advance()
def advance(self): # advance to next data shard
self.current_shard = (self.current_shard + 1) % len(self.files)
self.current_position = self.process_rank * self.seq_len
self.tokens = _load_data_shard(self.files[self.current_shard], self.files_num_tokens[self.current_shard])
def next_batch(self):
batch_size = self.seq_len * self.num_processes
buf = self.tokens[self.current_position:self.current_position+self.seq_len+1]
# host side async is sufficient;
# no performance improvement was observed when introducing a separate stream.
inputs = buf[:-1].to(device="cuda", dtype=torch.int32, non_blocking=True) # inputs
targets = buf[1:].to(device="cuda", dtype=torch.int64, non_blocking=True) # targets
# advance current position and load next shard if necessary
self.current_position += batch_size
if self.current_position + batch_size + 1 >= len(self.tokens):
self.advance()
return inputs, targets
# -----------------------------------------------------------------------------
# int main
@dataclass
class Hyperparameters:
# data hyperparams
input_bin : str = 'data/fineweb10B/fineweb_train_*.bin' # input .bin to train on
input_val_bin : str = 'data/fineweb10B/fineweb_val_*.bin' # input .bin to eval validation loss on
# optimization hyperparams
batch_size : int = 8 # batch size, in sequences, across all devices
sequence_length : int = 64*1024 # sequence length, in tokens
num_iterations : int = 1480 # number of iterations to run
warmup_iters : int = 0
cooldown_iters : int = 600 # number of iterations of linear warmup/cooldown for triangular or trapezoidal schedule
weight_decay : float = 0
# evaluation and logging hyperparams
val_loss_every : int = 125 # every how many steps to evaluate val loss? 0 for only at the end
val_tokens : int = 10485760 # how many tokens of validation data? it's important to keep this fixed for consistent comparisons
save_every : int = 0 # every how many steps to save the checkpoint? 0 for only at the end
args = Hyperparameters()
# set up DDP (distributed data parallel). torchrun sets this env variable
ddp_rank = int(os.environ['RANK'])
ddp_local_rank = int(os.environ['LOCAL_RANK'])
ddp_world_size = int(os.environ['WORLD_SIZE'])
assert torch.cuda.is_available()
device = torch.device(f"cuda:{ddp_local_rank}")
torch.cuda.set_device(device)
print(f"using device: {device}")
dist.init_process_group(backend='nccl', device_id=device)
dist.barrier()
master_process = (ddp_rank == 0) # this process will do logging, checkpointing etc.
# begin logging
logfile = None
if master_process:
run_id = uuid.uuid4()
logdir = Path("logs") / f"{run_id}"
logdir.mkdir(exist_ok=True)
logfile = Path("logs") / f"{run_id}.txt"
print(logfile.stem)
# create the log file
with logfile.open("w") as f:
# begin the log by printing this file (the Python code)
print(code, file=f)
print("=" * 100, file=f)
def print0(s, logonly=False):
if master_process:
with logfile.open("a") as f:
if not logonly:
print(s)
print(s, file=f)
# log information about the hardware/software environment this is running on
# and print the full `nvidia-smi` to file
print0(f"Running python {sys.version}")
print0(f"Running pytorch {torch.version.__version__} compiled for CUDA {torch.version.cuda}\nnvidia-smi:")
import subprocess
result = subprocess.run(['nvidia-smi'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
print0(f'{result.stdout}', logonly=True)
print0('='*100, logonly=True)
# calculate the number of steps to take in the val loop.
assert args.val_tokens % (args.sequence_length * ddp_world_size) == 0
val_steps = args.val_tokens // (args.sequence_length * ddp_world_size)
# calculate the steps of gradient accumulation required to attain the desired global batch size.
assert args.batch_size % (ddp_world_size) == 0
train_accumulation_steps = args.batch_size // ddp_world_size
# load tokens
train_loader = DistributedDataLoader(args.input_bin, args.sequence_length, ddp_rank, ddp_world_size)
val_loader = DistributedDataLoader(args.input_val_bin, args.sequence_length, ddp_rank, ddp_world_size)
print0(f"Training DataLoader: total number of tokens: {train_loader.total_num_tokens} across {len(train_loader.files)} files")
print0(f"Validation DataLoader: total number of tokens: {val_loader.total_num_tokens} across {len(val_loader.files)} files")
print0('='*100, logonly=True)
inputs_train, targets_train = train_loader.next_batch()
# there are only 50257 unique GPT-2 tokens; we extend to nearest multiple of 128 for efficiency. suggested to me by @Grad62304977.
# this originates from Karpathy's experiments.
num_vocab = 50304
model = GPT(GPTConfig(vocab_size=num_vocab, num_layers=12, num_heads=6, model_dim=768))
model = model.cuda().bfloat16()
for m in model.modules():
if isinstance(m, CastedLinear):
m.float()
config.coordinate_descent_tuning = True # suggested by @Chillee
model = torch.compile(model)
# here we wrap model into DDP container
model = DDP(model, device_ids=[ddp_local_rank], broadcast_buffers=False, gradient_as_bucket_view=True)
raw_model = model.module # always contains the "raw" unwrapped model
# init the optimizer(s)
embed_params = [*raw_model.embed.parameters(), *raw_model.value_embeds.parameters()]
optimizer1 = torch.optim.Adam(embed_params, lr=0.6, betas=(0.8, 0.95), fused=True)
optimizer2 = torch.optim.Adam([raw_model.lm_head.weight], lr=0.008, betas=(0.8, 0.95), fused=True)
params = list(raw_model.blocks.parameters())
matrix_params = [p for p in params if p.ndim == 2]
scalar_params = [p for p in params if p.ndim < 2] + [raw_model.skip_weights]
optimizer3 = Muon(matrix_params, lr=0.05, momentum=0.95)
optimizer4 = torch.optim.Adam(scalar_params, lr=0.04, betas=(0.8, 0.95), fused=True)
optimizers = [optimizer1, optimizer2, optimizer3, optimizer4]
# learning rate decay scheduler (linear warmup and cooldown)
def get_lr(it):
assert it <= args.num_iterations
# 1) linear warmup for warmup_iters steps
if it < args.warmup_iters:
return (it+1) / args.warmup_iters
# 2) constant lr for a while
elif it < args.num_iterations - args.cooldown_iters:
return 1.0
# 3) linear cooldown
else:
decay_ratio = (args.num_iterations - it) / args.cooldown_iters
return decay_ratio
schedulers = [torch.optim.lr_scheduler.LambdaLR(opt, get_lr) for opt in optimizers]
sliding_window_num_blocks = torch.tensor(1, dtype=torch.int32, device="cuda")
sw_num_blocks_prev = 1
# Start training loop
training_time_ms = 0
# start the clock
torch.cuda.synchronize()
t0 = time.perf_counter()
# begin training
for step in range(args.num_iterations + 1):
last_step = (step == args.num_iterations)
# This effectively ignores timing first 10 steps, which are slower for weird reasons.
# Alternately, and slightly more correctly in terms of benchmarking, we could do 10
# steps with dummy data first, and then re-initialize the model and reset the loader.
if step == 10:
training_time_ms = 0
t0 = time.perf_counter()
timed_steps = float('nan') if step <= 11 else (step - 10) + 1 # <= 11 to avoid bug in val
# Linearly increase the sliding window size over training in chunks of 64 from 64 -> 1792. By @fernbear.bsky.social
frac_done = step / args.num_iterations # training progress
sw_num_blocks = int(((1 - frac_done) * 64 + frac_done * 1792 + 64) // 128)
if sw_num_blocks != sw_num_blocks_prev:
sliding_window_num_blocks.copy_(sw_num_blocks, non_blocking=True)
sw_num_blocks_prev = sw_num_blocks
# once in a while evaluate the validation dataset
if (last_step or (args.val_loss_every > 0 and step % args.val_loss_every == 0)):
# stop the clock
torch.cuda.synchronize()
training_time_ms += 1000 * (time.perf_counter() - t0)
# run validation batches
model.eval()
val_loader.reset()
val_loss = 0.0
for _ in range(val_steps):
with torch.no_grad():
inputs_val, targets_val = val_loader.next_batch()
val_loss += model(inputs_val, targets_val, sliding_window_num_blocks)
dist.all_reduce(val_loss, op=dist.ReduceOp.AVG)
val_loss /= val_steps
# log val loss to console and to logfile
print0(f'step:{step}/{args.num_iterations} val_loss:{val_loss:.4f} train_time:{training_time_ms:.0f}ms step_avg:{training_time_ms/(timed_steps-1):.2f}ms')
# start the clock again
torch.cuda.synchronize()
t0 = time.perf_counter()
if master_process and (last_step or (args.save_every > 0 and step % args.save_every == 0)):
# stop the clock
torch.cuda.synchronize()
training_time_ms += 1000 * (time.perf_counter() - t0)
# save the state of the training process
log = dict(step=step, code=code, model=raw_model.state_dict(), optimizers=[opt.state_dict() for opt in optimizers])
torch.save(log, 'logs/%s/state_step%06d.pt' % (run_id, step))
# start the clock again
torch.cuda.synchronize()
t0 = time.perf_counter()
# bit confusing: we want to make sure to eval on 0th iteration
# but also after the very last iteration. so we loop for step <= num_iterations
# instead of just < num_iterations (one extra due to <=), only to do
# the validation/sampling one last time, and then we break right here as we're done.
if last_step:
break
# --------------- TRAINING SECTION BEGIN -----------------
model.train()
for i in range(1, train_accumulation_steps + 1):
with contextlib.ExitStack() as stack:
if i < train_accumulation_steps: # there's no need to sync gradients every accumulation step
stack.enter_context(model.no_sync())
if step >= 5:
stack.enter_context(torch.compiler.set_stance(skip_guard_eval_unsafe=True))
model(inputs_train, targets_train, sliding_window_num_blocks).backward()
inputs_train, targets_train = train_loader.next_batch()
if train_accumulation_steps != 1:
for p in model.parameters():
p.grad /= train_accumulation_steps
# momentum warmup for Muon
frac = min(step/300, 1)
for group in optimizer3.param_groups:
group['momentum'] = (1 - frac) * 0.85 + frac * 0.95
# step the optimizers and schedulers
for opt, sched in zip(optimizers, schedulers):
opt.step()
sched.step()
# null the gradients
model.zero_grad(set_to_none=True)
# --------------- TRAINING SECTION END -------------------
# everything that follows now is just diagnostics, prints, logging, etc.
approx_time = training_time_ms + 1000 * (time.perf_counter() - t0)
print0(f"step:{step+1}/{args.num_iterations} train_time:{approx_time:.0f}ms step_avg:{approx_time/timed_steps:.2f}ms")
print0(f"peak memory consumption: {torch.cuda.max_memory_allocated() // 1024 // 1024} MiB")
# -------------------------------------------------------------------------
# clean up nice
dist.destroy_process_group()
====================================================================================================
Running python 3.10.12 (main, Sep 11 2024, 15:47:36) [GCC 11.4.0]
Running pytorch 2.6.0.dev20241203+cu124 compiled for CUDA 12.4
nvidia-smi:
Wed Dec 11 08:44:46 2024
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.183.06 Driver Version: 535.183.06 CUDA Version: 12.2 |
|-----------------------------------------+----------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+======================+======================|
| 0 NVIDIA H100 80GB HBM3 On | 00000000:19:00.0 Off | 0 |
| N/A 38C P0 125W / 700W | 7084MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 1 NVIDIA H100 80GB HBM3 On | 00000000:3B:00.0 Off | 0 |
| N/A 30C P0 115W / 700W | 3451MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 2 NVIDIA H100 80GB HBM3 On | 00000000:4C:00.0 Off | 0 |
| N/A 28C P0 111W / 700W | 3451MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 3 NVIDIA H100 80GB HBM3 On | 00000000:5D:00.0 Off | 0 |
| N/A 36C P0 114W / 700W | 3451MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 4 NVIDIA H100 80GB HBM3 On | 00000000:9B:00.0 Off | 0 |
| N/A 38C P0 120W / 700W | 3451MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 5 NVIDIA H100 80GB HBM3 On | 00000000:BB:00.0 Off | 0 |
| N/A 30C P0 117W / 700W | 3451MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 6 NVIDIA H100 80GB HBM3 On | 00000000:CB:00.0 Off | 0 |
| N/A 35C P0 119W / 700W | 3451MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
| 7 NVIDIA H100 80GB HBM3 On | 00000000:DB:00.0 Off | 0 |
| N/A 30C P0 118W / 700W | 3211MiB / 81559MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+
+---------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=======================================================================================|
+---------------------------------------------------------------------------------------+
====================================================================================================
Training DataLoader: total number of tokens: 1000000000 across 10 files
Validation DataLoader: total number of tokens: 100000000 across 1 files
====================================================================================================
step:0/1480 val_loss:10.8258 train_time:0ms step_avg:nanms
step:1/1480 train_time:29106ms step_avg:nanms
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