当我在GPU上运行以下代码时,它会训练几个epoch,然后就卡住了。
被卡住的进程仍然存在,但是GPU使用率变为0%。
在下面的代码中,我正在使用来自tf.contrib.data.Dataset的Dataset API。但我也尝试过使用placeholder和feed字典方法进行训练,但是也会在随机的epoch卡住。
我已经苦苦挣扎了2-3周,但是找不到解决方法。
我正在远程GPU集群上运行代码。以下是有关群集节点的一些信息,
使用tensorflow gpu版本1.4
节点名称=node050 Arch=x86_64 CoresPerSocket=1 CPUAlloc=0 CPUErr=0 CPUTot=24 CPULoad=12.03 Features=Proc24、GPU4 Gres=gpu:4 NodeAddr=node050 NodeHostName=node050 Version=15.08 OS=Linux RealMemory=129088 AllocMem=0 FreeMem=125664 Sockets=24 Boards=1 状态=IDLE ThreadsPerCore=1 TmpDisk=0 Weight=1 Owner=N / A BootTime = 2017-11-07T08:20:00 SlurmdStartTime = 2017-11-07T08:24:06 CapWatts = n / a CurrentWatts = 0 LowestJoules = 0 ConsumedJoules = 0 ExtSensorsJoules = n / s ExtSensorsWatts = 0 ExtSensorsTemp = n / s
代码
以下是不同挂起的屏幕截图, 挂在一个epoch上 该时间的GPU使用情况 运行时的GPU使用情况(未挂起) 挂在另一个epoch上 这种随机挂起的行为在每次运行时都会重复出现。 每次它都会在随机的epoch上挂起。这就是为什么我无法找出问题所在。 通过查看代码或其他设置,有没有人可以给我任何关于出了什么问题或如何调试的想法?谢谢
节点名称=node050 Arch=x86_64 CoresPerSocket=1 CPUAlloc=0 CPUErr=0 CPUTot=24 CPULoad=12.03 Features=Proc24、GPU4 Gres=gpu:4 NodeAddr=node050 NodeHostName=node050 Version=15.08 OS=Linux RealMemory=129088 AllocMem=0 FreeMem=125664 Sockets=24 Boards=1 状态=IDLE ThreadsPerCore=1 TmpDisk=0 Weight=1 Owner=N / A BootTime = 2017-11-07T08:20:00 SlurmdStartTime = 2017-11-07T08:24:06 CapWatts = n / a CurrentWatts = 0 LowestJoules = 0 ConsumedJoules = 0 ExtSensorsJoules = n / s ExtSensorsWatts = 0 ExtSensorsTemp = n / s
代码
dat_split = np.load('data/dat_split2.npy')
X_train = dat_split[0].astype(np.float32)
X_test = dat_split[1].astype(np.float32)
y_train = dat_split[2].astype(np.int32)
y_test = dat_split[3].astype(np.int32)
num_epochs = 100
train_data_len = X_train.shape[0]
test_data_len = X_test.shape[0]
num_joints = len(considered_joints)
num_classes = len(classes)
############ taking batch_size even data##########
even_train_len = (train_data_len//batch_size)*batch_size
even_test_len = (test_data_len//batch_size)*batch_size
X_train = X_train[:even_train_len]
X_test = X_test[:even_test_len]
y_train = y_train[:even_train_len]
y_test = y_test[:even_test_len]
train_dat = Dataset.from_tensor_slices((X_train, y_train))
train_dat = train_dat.batch(batch_size)
test_dat = Dataset.from_tensor_slices((X_test, y_test))
test_dat = test_dat.batch(batch_size)
iterator = Iterator.from_structure(train_dat.output_types, train_dat.output_shapes)
trainig_iterator_init = iterator.make_initializer(train_dat)
test_iterator_init = iterator.make_initializer(test_dat)
if __name__ == '__main__':
global_cell = GlobalLSTM(num_units=num_units_each_cell, num_joints=num_joints) #GlobalLSTM is a subtype of RNNCell
next_element = iterator.get_next()
X_loaded2, Y_loaded = next_element
X_loaded = tf.where(tf.is_nan(X_loaded2), tf.zeros_like(X_loaded2), X_loaded2)
init_state = global_cell.zero_state((batch_size), tf.float32)
rnn_ops, rnn_state = tf.nn.dynamic_rnn(global_cell, X_loaded, dtype=tf.float32)
with tf.variable_scope('softmax__'):
W = tf.get_variable('W', [(num_joints)*num_units_each_cell, num_classes], initializer=tf.truncated_normal_initializer(0.0, 1.0))
b = tf.get_variable('b', [num_classes], initializer=tf.truncated_normal_initializer(0.0, 1.0))
final_logits = tf.matmul(rnn_state[1], W) + b # taking h state of rnn
with tf.name_scope("loss_comp"):
total_loss = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(logits=final_logits, labels=tf.one_hot(Y_loaded, num_classes)))
with tf.name_scope("train_step"):
train_step = tf.train.AdamOptimizer(learning_rate).minimize(total_loss)
with tf.name_scope("pred_accu"):
predictions = tf.nn.softmax(final_logits)
pred2 = tf.reshape(tf.argmax(predictions, 1), [-1, 1])
correct_pred = tf.equal(pred2, tf.cast(Y_loaded, tf.int64))
accuracy_ = tf.reduce_mean(tf.cast(correct_pred, tf.float32))
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
tic = time.clock()
for step in range(num_epochs):
sess.run(trainig_iterator_init)
batch_cnt = train_data_len//batch_size
epch_loss = 0.0
epch_acc = 0.0
for bt in range(batch_cnt):
_, loss_, acc = sess.run([train_step, total_loss, accuracy_])
epch_loss += loss_
epch_acc += acc
print ('loss after epoch, ', step,': ', epch_loss/batch_cnt, ' ## accuracy : ', epch_acc/batch_cnt)
print ("optimization finished, time required: ", time.clock()-tic)
#############test accuracy##############
batch_cnt = test_data_len//batch_size
sess.run(test_iterator_init)
print ('testing accuracy on test data : batch number', batch_cnt)
epch_acc = 0.0
for bt in range(batch_cnt):
acc = sess.run(accuracy_)
epch_acc += acc
print ('testing accuracy : ', epch_acc/batch_cnt)
以下是不同挂起的屏幕截图, 挂在一个epoch上 该时间的GPU使用情况 运行时的GPU使用情况(未挂起) 挂在另一个epoch上 这种随机挂起的行为在每次运行时都会重复出现。 每次它都会在随机的epoch上挂起。这就是为什么我无法找出问题所在。 通过查看代码或其他设置,有没有人可以给我任何关于出了什么问题或如何调试的想法?谢谢