def _open_forward_output_files_and_get_file_handles(forward_outs, require_decodings, info_file, output_folder):
post_file={}
for out_id in range(len(forward_outs)):
if require_decodings[out_id]:
out_file=info_file.replace('.info','_'+forward_outs[out_id]+'_to_decode.ark')
else:
out_file=info_file.replace('.info','_'+forward_outs[out_id]+'.ark')
post_file[forward_outs[out_id]]=open_or_fd(out_file,output_folder,'wb')
return post_file
def _open_forward_output_files_and_get_file_handles(
forward_outs, require_decodings, info_file, output_folder):
post_file = {}
for out_id in range(len(forward_outs)):
if require_decodings[out_id]:
out_file = info_file.replace(
".info", "_" + forward_outs[out_id] + "_to_decode.ark")
else:
out_file = info_file.replace(
".info", "_" + forward_outs[out_id] + ".ark")
post_file[forward_outs[out_id]] = open_or_fd(
out_file, output_folder, "wb")
return post_file
def run_nn(data_name,data_set,data_end_index,fea_dict,lab_dict,arch_dict,cfg_file,processed_first,next_config_file):
# This function processes the current chunk using the information in cfg_file. In parallel, the next chunk is load into the CPU memory
# Reading chunk-specific cfg file (first argument-mandatory file)
if not(os.path.exists(cfg_file)):
sys.stderr.write('ERROR: The config file %s does not exist!\n'%(cfg_file))
sys.exit(0)
else:
config = configparser.ConfigParser()
config.read(cfg_file)
# Setting torch seed
seed=int(config['exp']['seed'])
torch.manual_seed(seed)
random.seed(seed)
np.random.seed(seed)
# Reading config parameters
output_folder=config['exp']['out_folder']
use_cuda=strtobool(config['exp']['use_cuda'])
multi_gpu=strtobool(config['exp']['multi_gpu'])
to_do=config['exp']['to_do']
info_file=config['exp']['out_info']
model=config['model']['model'].split('\n')
forward_outs=config['forward']['forward_out'].split(',')
forward_normalize_post=list(map(strtobool,config['forward']['normalize_posteriors'].split(',')))
forward_count_files=config['forward']['normalize_with_counts_from'].split(',')
require_decodings=list(map(strtobool,config['forward']['require_decoding'].split(',')))
use_cuda=strtobool(config['exp']['use_cuda'])
save_gpumem=strtobool(config['exp']['save_gpumem'])
is_production=strtobool(config['exp']['production'])
if to_do=='train':
batch_size=int(config['batches']['batch_size_train'])
if to_do=='valid':
batch_size=int(config['batches']['batch_size_valid'])
if to_do=='forward':
batch_size=1
# ***** Reading the Data********
if processed_first:
# Reading all the features and labels for this chunk
shared_list=[]
p=threading.Thread(target=read_lab_fea, args=(cfg_file,is_production,shared_list,output_folder,))
p.start()
p.join()
data_name=shared_list[0]
data_end_index=shared_list[1]
fea_dict=shared_list[2]
lab_dict=shared_list[3]
arch_dict=shared_list[4]
data_set=shared_list[5]
# converting numpy tensors into pytorch tensors and put them on GPUs if specified
if not(save_gpumem) and use_cuda:
data_set=torch.from_numpy(data_set).float().cuda()
else:
data_set=torch.from_numpy(data_set).float()
# Reading all the features and labels for the next chunk
shared_list=[]
p=threading.Thread(target=read_lab_fea, args=(next_config_file,is_production,shared_list,output_folder,))
p.start()
# Reading model and initialize networks
inp_out_dict=fea_dict
[nns,costs]=model_init(inp_out_dict,model,config,arch_dict,use_cuda,multi_gpu,to_do)
# optimizers initialization
optimizers=optimizer_init(nns,config,arch_dict)
# pre-training and multi-gpu init
for net in nns.keys():
pt_file_arch=config[arch_dict[net][0]]['arch_pretrain_file']
if pt_file_arch!='none':
checkpoint_load = torch.load(pt_file_arch)
nns[net].load_state_dict(checkpoint_load['model_par'])
optimizers[net].load_state_dict(checkpoint_load['optimizer_par'])
optimizers[net].param_groups[0]['lr']=float(config[arch_dict[net][0]]['arch_lr']) # loading lr of the cfg file for pt
if multi_gpu:
nns[net] = torch.nn.DataParallel(nns[net])
if to_do=='forward':
post_file={}
for out_id in range(len(forward_outs)):
if require_decodings[out_id]:
out_file=info_file.replace('.info','_'+forward_outs[out_id]+'_to_decode.ark')
else:
out_file=info_file.replace('.info','_'+forward_outs[out_id]+'.ark')
post_file[forward_outs[out_id]]=open_or_fd(out_file,output_folder,'wb')
# check automatically if the model is sequential
seq_model=is_sequential_dict(config,arch_dict)
# ***** Minibatch Processing loop********
if seq_model or to_do=='forward':
N_snt=len(data_name)
N_batches=int(N_snt/batch_size)
else:
N_ex_tr=data_set.shape[0]
N_batches=int(N_ex_tr/batch_size)
beg_batch=0
end_batch=batch_size
snt_index=0
beg_snt=0
start_time = time.time()
# array of sentence lengths
arr_snt_len=shift(shift(data_end_index, -1,0)-data_end_index,1,0)
arr_snt_len[0]=data_end_index[0]
loss_sum=0
err_sum=0
inp_dim=data_set.shape[1]
for i in range(N_batches):
max_len=0
if seq_model:
max_len=int(max(arr_snt_len[snt_index:snt_index+batch_size]))
inp= torch.zeros(max_len,batch_size,inp_dim).contiguous()
for k in range(batch_size):
snt_len=data_end_index[snt_index]-beg_snt
N_zeros=max_len-snt_len
# Appending a random number of initial zeros, tge others are at the end.
N_zeros_left=random.randint(0,N_zeros)
# randomizing could have a regularization effect
inp[N_zeros_left:N_zeros_left+snt_len,k,:]=data_set[beg_snt:beg_snt+snt_len,:]
beg_snt=data_end_index[snt_index]
snt_index=snt_index+1
else:
# features and labels for batch i
if to_do!='forward':
inp= data_set[beg_batch:end_batch,:].contiguous()
else:
snt_len=data_end_index[snt_index]-beg_snt
inp= data_set[beg_snt:beg_snt+snt_len,:].contiguous()
beg_snt=data_end_index[snt_index]
snt_index=snt_index+1
# use cuda
if use_cuda:
inp=inp.cuda()
if to_do=='train':
# Forward input, with autograd graph active
outs_dict=forward_model(fea_dict,lab_dict,arch_dict,model,nns,costs,inp,inp_out_dict,max_len,batch_size,to_do,forward_outs)
for opt in optimizers.keys():
optimizers[opt].zero_grad()
outs_dict['loss_final'].backward()
# Gradient Clipping (th 0.1)
#for net in nns.keys():
# torch.nn.utils.clip_grad_norm_(nns[net].parameters(), 0.1)
for opt in optimizers.keys():
if not(strtobool(config[arch_dict[opt][0]]['arch_freeze'])):
optimizers[opt].step()
else:
with torch.no_grad(): # Forward input without autograd graph (save memory)
outs_dict=forward_model(fea_dict,lab_dict,arch_dict,model,nns,costs,inp,inp_out_dict,max_len,batch_size,to_do,forward_outs)
if to_do=='forward':
for out_id in range(len(forward_outs)):
out_save=outs_dict[forward_outs[out_id]].data.cpu().numpy()
if forward_normalize_post[out_id]:
# read the config file
counts = load_counts(forward_count_files[out_id])
out_save=out_save-np.log(counts/np.sum(counts))
# save the output
write_mat(output_folder,post_file[forward_outs[out_id]], out_save, data_name[i])
else:
loss_sum=loss_sum+outs_dict['loss_final'].detach()
err_sum=err_sum+outs_dict['err_final'].detach()
# update it to the next batch
beg_batch=end_batch
end_batch=beg_batch+batch_size
# Progress bar
if to_do == 'train':
status_string="Training | (Batch "+str(i+1)+"/"+str(N_batches)+")"+" | L:" +str(round(loss_sum.cpu().item()/(i+1),3))
if i==N_batches-1:
status_string="Training | (Batch "+str(i+1)+"/"+str(N_batches)+")"
if to_do == 'valid':
status_string="Validating | (Batch "+str(i+1)+"/"+str(N_batches)+")"
if to_do == 'forward':
status_string="Forwarding | (Batch "+str(i+1)+"/"+str(N_batches)+")"
progress(i, N_batches, status=status_string)
elapsed_time_chunk=time.time() - start_time
loss_tot=loss_sum/N_batches
err_tot=err_sum/N_batches
# clearing memory
del inp, outs_dict, data_set
# save the model
if to_do=='train':
for net in nns.keys():
checkpoint={}
if multi_gpu:
checkpoint['model_par']=nns[net].module.state_dict()
else:
checkpoint['model_par']=nns[net].state_dict()
checkpoint['optimizer_par']=optimizers[net].state_dict()
out_file=info_file.replace('.info','_'+arch_dict[net][0]+'.pkl')
torch.save(checkpoint, out_file)
if to_do=='forward':
for out_name in forward_outs:
post_file[out_name].close()
# Write info file
with open(info_file, "w") as text_file:
text_file.write("[results]\n")
if to_do!='forward':
text_file.write("loss=%s\n" % loss_tot.cpu().numpy())
text_file.write("err=%s\n" % err_tot.cpu().numpy())
text_file.write("elapsed_time_chunk=%f\n" % elapsed_time_chunk)
text_file.close()
# Getting the data for the next chunk (read in parallel)
p.join()
data_name=shared_list[0]
data_end_index=shared_list[1]
fea_dict=shared_list[2]
lab_dict=shared_list[3]
arch_dict=shared_list[4]
data_set=shared_list[5]
# converting numpy tensors into pytorch tensors and put them on GPUs if specified
if not(save_gpumem) and use_cuda:
data_set=torch.from_numpy(data_set).float().cuda()
else:
data_set=torch.from_numpy(data_set).float()
return [data_name,data_set,data_end_index,fea_dict,lab_dict,arch_dict]
for snt_id in fea_dev.keys():
spk_id = snt_id.split('_')[0]
# /std_spk_dev[spk_id]
fea_pase_dev[snt_id] = (fea_pase_dev[snt_id] -
mean_spk_dev[spk_id])
fea_pase_dev[snt_id] = context_window(fea_pase_dev[snt_id], left,
right)
# Network initialization
inp_dim = fea_pase_dev[snt_id].shape[1]
nnet = MLP(options, inp_dim)
nnet.to(device)
nnet.load_state_dict(torch.load(ASR_model_file))
nnet.eval()
post_file = open_or_fd(ark_file, output_folder, 'wb')
for snt_id in fea_dev.keys():
pout = nnet(torch.from_numpy(fea_pase_dev[snt_id]).to(device).float())
pout = pout - torch.tensor(log_counts).float().to(device)
write_mat(output_folder, post_file, pout.data.cpu().numpy(), snt_id)
# doing decoding
print('Decoding...')
cmd_decode = cfg_dec['decoding_script_folder'] + '/' + cfg_dec['decoding_script'] + ' ' + \
os.path.abspath(output_folder+'/dec_cfg.ini')+' ' + \
output_folder+'/dec' + ' \"' + ark_file + '\"'
print(cmd_decode)
run_shell(cmd_decode)
