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[test] fixed amp convergence comparison test (#454)

pull/455/head
Frank Lee 2022-03-18 16:28:16 +08:00 committed by GitHub
parent a241f61b34
commit af185b5519
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 35 additions and 26 deletions
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46
tests/test_amp/test_naive_fp16.py
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@ -3,7 +3,7 @@ import colossalai
import copy
import pytest
import torch.multiprocessing as mp
from colossalai.amp import convert_to_naive_amp
from colossalai.amp import convert_to_naive_amp, convert_to_apex_amp
from tests.components_to_test.registry import non_distributed_component_funcs
from colossalai.testing import assert_close_loose
from colossalai.utils import free_port
@ -23,23 +23,29 @@ def run_naive_amp():
and fp32 torch optimizer
"""
torch.backends.cudnn.benchmark = False
torch.backends.cudnn.deterministic = True
# create layer
test_models = ['repeated_computed_layers', 'nested_model']
test_models = ['repeated_computed_layers', 'nested_model', 'resnet18']
for test_name in test_models:
get_component_func = non_distributed_component_funcs.get_callable(test_name)
model_builder, train_dataloader, _, optim_class, _ = get_component_func()
# create model
amp_model = model_builder(checkpoint=True).cuda()
torch_model = copy.deepcopy(amp_model)
naive_amp_model = model_builder(checkpoint=True).cuda()
apex_amp_model = copy.deepcopy(naive_amp_model)
# create optimizer
amp_optimizer = optim_class(amp_model.parameters(), lr=1e-3)
torch_optimizer = optim_class(torch_model.parameters(), lr=1e-3)
naive_amp_optimizer = optim_class(naive_amp_model.parameters(), lr=1e-3)
apex_amp_optimizer = optim_class(apex_amp_model.parameters(), lr=1e-3)
# inject naive amp
amp_config = dict(initial_scale=1)
amp_model, amp_optimizer = convert_to_naive_amp(amp_model, amp_optimizer, amp_config)
# inject naive and apex amp
naive_amp_config = dict(initial_scale=128)
naive_amp_model, naive_amp_optimizer = convert_to_naive_amp(naive_amp_model, naive_amp_optimizer,
naive_amp_config)
apex_amp_config = dict(opt_level='O2', loss_scale=128, keep_batchnorm_fp32=False)
apex_amp_model, apex_amp_optimizer = convert_to_apex_amp(apex_amp_model, apex_amp_optimizer, apex_amp_config)
# create data
data_iter = iter(train_dataloader)
@ -47,25 +53,25 @@ def run_naive_amp():
data = data.cuda()
# forward pass
amp_output = amp_model(data)
torch_output = torch_model(data)
assert_close_loose(amp_output, torch_output)
naive_amp_output = naive_amp_model(data)
apex_amp_output = apex_amp_model(data)
assert_close_loose(naive_amp_output, apex_amp_output)
# backward
amp_optimizer.backward(amp_output.mean())
torch_output.mean().backward()
naive_amp_optimizer.backward(naive_amp_output.mean())
apex_amp_optimizer.backward(apex_amp_output.mean())
# check grad
for amp_param, torch_param in zip(amp_model.parameters(), torch_model.parameters()):
assert_close_loose(amp_param.grad, torch_param.grad.half())
for naive_amp_param, apex_amp_param in zip(naive_amp_model.parameters(), apex_amp_model.parameters()):
assert_close_loose(naive_amp_param.grad, apex_amp_param.grad)
# step
amp_optimizer.step()
torch_optimizer.step()
naive_amp_optimizer.step()
apex_amp_optimizer.step()
# check updated param
for amp_param, torch_param in zip(amp_model.parameters(), torch_model.parameters()):
assert_close_loose(amp_param, torch_param.half())
for naive_amp_param, apex_amp_param in zip(naive_amp_model.parameters(), apex_amp_model.parameters()):
assert_close_loose(naive_amp_param, apex_amp_param)
def run_dist(rank, world_size, port):

2
tests/test_zero_data_parallel/test_shard_model_v2.py
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@ -46,7 +46,7 @@ def run_model_test(enable_autocast, shard_strategy_class):
model = DDP(model)
for i, (data, label) in enumerate(train_dataloader):
if i > 3:
if i > 5:
break
data, label = cast_tensor_to_fp16(data).cuda(), label.cuda()

13
tests/test_zero_data_parallel/test_sharded_optim_v2.py
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@ -18,6 +18,7 @@ from tests.components_to_test.registry import non_distributed_component_funcs
from torch.nn.parallel import DistributedDataParallel as DDP
from common import CONFIG, check_sharded_params_padding
from colossalai.amp import convert_to_apex_amp
def _run_step(model, optimizer, data, label, criterion, enable_autocast=False):
@ -65,8 +66,6 @@ def _run_test_sharded_optim_v2(cpu_offload, shard_strategy_class, use_cpuadam):
model = model_builder(checkpoint=True).half()
col_model_deepcopy(zero_model, model)
model = model.cuda().float()
if dist.get_world_size() > 1:
model = DDP(model)
if use_cpuadam:
optimizer_class = CPUAdam
@ -74,12 +73,16 @@ def _run_test_sharded_optim_v2(cpu_offload, shard_strategy_class, use_cpuadam):
sharded_optim = optimizer_class(zero_model.parameters(), lr=1e-3)
sharded_optim = ShardedOptimizerV2(zero_model, sharded_optim, cpu_offload=cpu_offload, initial_scale=2**5)
amp_config = dict(opt_level='O2', keep_batchnorm_fp32=False)
apex_model, apex_optimizer = convert_to_apex_amp(model, optim, amp_config)
if dist.get_world_size() > 1:
apex_model = DDP(apex_model)
for i, (data, label) in enumerate(train_dataloader):
# FIXME() if i > 5, the unittest will fail
if i > 3:
if i > 5:
break
data, label = data.cuda(), label.cuda()
_run_step(model, optim, data, label, criterion, False)
_run_step(apex_model, apex_optimizer, data, label, criterion, False)
_run_step(zero_model, sharded_optim, data, label, criterion, False)
check_sharded_params_padding(model, zero_model, loose=True)
for param in model.parameters():