def Train(sess, train_images, train_labels, mnist_test_file, network_parameters, num_steps, save_path, training_params, eval_steps=0): """Train MNIST for a number of steps. Args: mnist_train_file: path of MNIST train data file. mnist_test_file: path of MNIST test data file. network_parameters: parameters for defining and training the network. num_steps: number of steps to run. Here steps = lots save_path: path where to save trained parameters. eval_steps: evaluate the model every eval_steps. Returns: the result after the final training step. Raises: ValueError: if the accountant_type is not supported. """ batch_size = FLAGS.batch_size params = { "accountant_type": FLAGS.accountant_type, "task_id": 0, "batch_size": FLAGS.batch_size, "projection_dimensions": FLAGS.projection_dimensions, "default_gradient_l2norm_bound": network_parameters.default_gradient_l2norm_bound, "num_hidden_layers": FLAGS.num_hidden_layers, "hidden_layer_num_units": FLAGS.hidden_layer_num_units, "num_examples": NUM_TRAINING_IMAGES, "learning_rate": FLAGS.lr, "end_learning_rate": FLAGS.end_lr, "learning_rate_saturate_epochs": FLAGS.lr_saturate_epochs } # Log different privacy parameters dependent on the accountant type. if FLAGS.accountant_type == "Amortized": params.update({ "flag_eps": FLAGS.eps, "flag_delta": FLAGS.delta, "flag_pca_eps": FLAGS.pca_eps, "flag_pca_delta": FLAGS.pca_delta, }) elif FLAGS.accountant_type == "Moments": params.update({ "sigma": FLAGS.sigma, "pca_sigma": FLAGS.pca_sigma, }) # Create the basic Mnist model. images = tf.get_default_graph().get_tensor_by_name("images:0") labels = tf.get_default_graph().get_tensor_by_name("labels:0") logits = tf.get_default_graph().get_tensor_by_name("logits:0") projection = tf.get_default_graph().get_tensor_by_name("projection:0") cost = tf.nn.softmax_cross_entropy_with_logits(logits=logits, labels=tf.one_hot( labels, 10)) # The actual cost is the average across the examples. cost = tf.reduce_sum(cost, [0]) / batch_size if FLAGS.accountant_type == "Amortized": priv_accountant = accountant.AmortizedAccountant(NUM_TRAINING_IMAGES) sigma = None pca_sigma = None with_privacy = FLAGS.eps > 0 elif FLAGS.accountant_type == "Moments": priv_accountant = accountant.GaussianMomentsAccountant( NUM_TRAINING_IMAGES) sigma = FLAGS.sigma pca_sigma = FLAGS.pca_sigma with_privacy = FLAGS.sigma > 0 else: raise ValueError("Undefined accountant type, needs to be " "Amortized or Moments, but got %s" % FLAGS.accountant) # Note: Here and below, we scale down the l2norm_bound by # batch_size. This is because per_example_gradients computes the # gradient of the minibatch loss with respect to each individual # example, and the minibatch loss (for our model) is the *average* # loss over examples in the minibatch. Hence, the scale of the # per-example gradients goes like 1 / batch_size. gaussian_sanitizer = sanitizer.AmortizedGaussianSanitizer( priv_accountant, [network_parameters.default_gradient_l2norm_bound / batch_size, True]) for var in training_params: if "gradient_l2norm_bound" in training_params[var]: l2bound = training_params[var]["gradient_l2norm_bound"] / batch_size gaussian_sanitizer.set_option(var, sanitizer.ClipOption(l2bound, True)) lr = tf.placeholder(tf.float32) eps = tf.placeholder(tf.float32) delta = tf.placeholder(tf.float32) init_ops = [] if network_parameters.projection_type == "PCA": with tf.variable_scope("pca"): # Compute differentially private PCA. all_data = tf.constant(train_images, dtype=tf.float32) pca_projection = dp_pca.ComputeDPPrincipalProjection( all_data, network_parameters.projection_dimensions, gaussian_sanitizer, [FLAGS.pca_eps, FLAGS.pca_delta], pca_sigma) assign_pca_proj = tf.assign(projection, pca_projection) init_ops.append(assign_pca_proj) # Add global_step global_step = tf.Variable(0, dtype=tf.int32, trainable=False, name="global_step") if with_privacy: gd_op = dp_optimizer.DPGradientDescentOptimizer( lr, [eps, delta], gaussian_sanitizer, sigma=sigma, batches_per_lot=FLAGS.batches_per_lot).minimize( cost, global_step=global_step) else: gd_op = tf.train.GradientDescentOptimizer(lr).minimize(cost) saver = tf.train.Saver() # We need to maintain the intialization sequence. for v in tf.trainable_variables(): sess.run(tf.variables_initializer([v])) sess.run(tf.global_variables_initializer()) sess.run(init_ops) results = [] start_time = time.time() prev_time = start_time filename = "results-0.json" log_path = os.path.join(save_path, filename) target_eps = np.array([float(s) for s in FLAGS.target_eps.split(",")]) target_eps = -np.sort(-target_eps) index_eps_to_save = 0 if FLAGS.accountant_type == "Amortized": # Only matters if --terminate_based_on_privacy is true. target_eps = [max(target_eps)] max_target_eps = max(target_eps) lot_size = FLAGS.batches_per_lot * FLAGS.batch_size lots_per_epoch = NUM_TRAINING_IMAGES / lot_size for step in xrange(num_steps): epoch = step / lots_per_epoch curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr, FLAGS.lr_saturate_epochs, epoch) curr_eps = utils.VaryRate(FLAGS.eps, FLAGS.end_eps, FLAGS.eps_saturate_epochs, epoch) lot = np.random.choice(np.arange(NUM_TRAINING_IMAGES), lot_size, replace=False) #print lot.shape images_lot = train_images[lot, :] labels_lot = train_labels[lot] for i in xrange(FLAGS.batches_per_lot): _ = sess.run( [gd_op], feed_dict={ lr: curr_lr, eps: curr_eps, delta: FLAGS.delta, images: images_lot[i * FLAGS.batch_size:(i + 1) * FLAGS.batch_size, :], labels: labels_lot[i * FLAGS.batch_size:(i + 1) * FLAGS.batch_size] }) sys.stderr.write("step: %d\n" % step) # See if we should stop training due to exceeded privacy budget: should_terminate = False terminate_spent_eps_delta = None if with_privacy and FLAGS.terminate_based_on_privacy: terminate_spent_eps_delta = priv_accountant.get_privacy_spent( sess, target_eps=[max_target_eps])[0] # For the Moments accountant, we should always have # spent_eps == max_target_eps. if (terminate_spent_eps_delta.spent_delta > FLAGS.target_delta or terminate_spent_eps_delta.spent_eps > max_target_eps): should_terminate = True if (eval_steps > 0 and (step + 1) % eval_steps == 0) or should_terminate: if with_privacy: spent_eps_deltas = priv_accountant.get_privacy_spent( sess, target_eps=target_eps) while index_eps_to_save < len( spent_eps_deltas ) and spent_eps_deltas[index_eps_to_save][1] < FLAGS.delta: saver.save( sess, save_path=save_path + "/eps" + str(spent_eps_deltas[index_eps_to_save][0]) + "_delta" + '%.2g' % spent_eps_deltas[index_eps_to_save][1] + "_pcasigma" + str(FLAGS.pca_sigma) + "_sigma" + str(FLAGS.sigma) + "/ckpt") index_eps_to_save += 1 else: spent_eps_deltas = [accountant.EpsDelta(0, 0)] for spent_eps, spent_delta in spent_eps_deltas: sys.stderr.write("spent privacy: eps %.4f delta %.5g\n" % (spent_eps, spent_delta)) saver.save(sess, save_path=save_path + "/ckpt") pred_train = np.argmax(predict(sess, train_images), axis=1) train_accuracy = np.mean(pred_train == train_labels) sys.stderr.write("train_accuracy: %.2f\n" % train_accuracy) # test_accuracy, mistakes = Eval(mnist_test_file, network_parameters, # num_testing_images=NUM_TESTING_IMAGES, # randomize=False, load_path=save_path, # save_mistakes=FLAGS.save_mistakes) # sys.stderr.write("eval_accuracy: %.2f\n" % test_accuracy) curr_time = time.time() elapsed_time = curr_time - prev_time prev_time = curr_time results.append({ "step": step + 1, # Number of lots trained so far. "elapsed_secs": elapsed_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, # "test_accuracy": test_accuracy, # "mistakes": mistakes }) loginfo = { "elapsed_secs": curr_time - start_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, # "test_accuracy": test_accuracy, "num_training_steps": step + 1, # Steps so far. # "mistakes": mistakes, "result_series": results } loginfo.update(params) if log_path: with tf.gfile.Open(log_path, "w") as f: json.dump(loginfo, f, indent=2) f.write("\n") f.close() if should_terminate: break
def runTensorFlow(sigma, clippingValue, batchSize, epsilon, delta, iteration): h_dim = 128 Z_dim = 100 # Initializations for a two-layer discriminator network mnist = input_data.read_data_sets( baseDir + "our_dp_conditional_gan_mnist/mnist_dataset", one_hot=True) X_dim = mnist.train.images.shape[1] y_dim = mnist.train.labels.shape[1] X = tf.placeholder(tf.float32, shape=[None, X_dim]) y = tf.placeholder(tf.float32, shape=[None, y_dim]) D_W1 = tf.Variable(xavier_init([X_dim + y_dim, h_dim])) D_b1 = tf.Variable(tf.zeros(shape=[h_dim])) D_W2 = tf.Variable(xavier_init([h_dim, 1])) D_b2 = tf.Variable(tf.zeros(shape=[1])) theta_D = [D_W1, D_W2, D_b1, D_b2] # Initializations for a two-layer genrator network Z = tf.placeholder(tf.float32, shape=[None, Z_dim]) G_W1 = tf.Variable(xavier_init([Z_dim + y_dim, h_dim])) G_b1 = tf.Variable(tf.zeros(shape=[h_dim])) G_W2 = tf.Variable(xavier_init([h_dim, X_dim])) G_b2 = tf.Variable(tf.zeros(shape=[X_dim])) theta_G = [G_W1, G_W2, G_b1, G_b2] # Delete all Flags del_all_flags(tf.flags.FLAGS) # Set training parameters tf.flags.DEFINE_string('f', '', 'kernel') tf.flags.DEFINE_float("lr", 0.1, "start learning rate") tf.flags.DEFINE_float("end_lr", 0.052, "end learning rate") tf.flags.DEFINE_float( "lr_saturate_epochs", 10000, "learning rate saturate epochs; set to 0 for a constant" "learning rate of --lr.") tf.flags.DEFINE_integer("batch_size", batchSize, "The training batch size.") tf.flags.DEFINE_integer("batches_per_lot", 1, "Number of batches per lot.") tf.flags.DEFINE_integer( "num_training_steps", 100000, "The number of training" "steps. This counts number of lots.") # Flags that control privacy spending during training tf.flags.DEFINE_float("target_delta", delta, "Maximum delta for" "--terminate_based_on_privacy.") tf.flags.DEFINE_float( "sigma", sigma, "Noise sigma, used only if accountant_type" "is Moments") tf.flags.DEFINE_string( "target_eps", str(epsilon), "Log the privacy loss for the target epsilon's. Only" "used when accountant_type is Moments.") tf.flags.DEFINE_float("default_gradient_l2norm_bound", clippingValue, "norm clipping") FLAGS = tf.flags.FLAGS # Set accountant type to GaussianMomentsAccountant NUM_TRAINING_IMAGES = 60000 priv_accountant = accountant.GaussianMomentsAccountant(NUM_TRAINING_IMAGES) # Sanitizer batch_size = FLAGS.batch_size clipping_value = FLAGS.default_gradient_l2norm_bound # clipping_value = tf.placeholder(tf.float32) gaussian_sanitizer = sanitizer.AmortizedGaussianSanitizer( priv_accountant, [clipping_value / batch_size, True]) # Instantiate the Generator Network G_sample = generator(Z, y, theta_G) # Instantiate the Discriminator Network D_real, D_logit_real = discriminator(X, y, theta_D) D_fake, D_logit_fake = discriminator(G_sample, y, theta_D) # Discriminator loss for real data D_loss_real = tf.reduce_mean( tf.nn.sigmoid_cross_entropy_with_logits( \ logits=D_logit_real, \ labels=tf.ones_like(D_logit_real)), \ [0]) # Discriminator loss for fake data D_loss_fake = tf.reduce_mean( \ tf.nn.sigmoid_cross_entropy_with_logits( \ logits=D_logit_fake, \ labels=tf.zeros_like(D_logit_fake)), [0]) # Generator loss G_loss = tf.reduce_mean( \ tf.nn.sigmoid_cross_entropy_with_logits( \ logits=D_logit_fake, labels=tf.ones_like(D_logit_fake)) \ , [0]) # ------------------------------------------------------------------------------ """ minimize_ours : Our method (Clipping the gradients of loss on real data and making them noisy + Clipping the gradients of loss on fake data) is implemented in this function . It can be found in the following directory: differential_privacy/dp_sgd/dp_optimizer/dp_optimizer.py' """ lr = tf.placeholder(tf.float32) sigma = FLAGS.sigma # Generator optimizer G_solver = tf.train.AdamOptimizer().minimize(G_loss, var_list=theta_G) # Discriminator Optimizer D_solver = dp_optimizer.DPGradientDescentOptimizer( \ lr, [None, None], \ gaussian_sanitizer, \ sigma=sigma, \ batches_per_lot= \ FLAGS.batches_per_lot). \ minimize_ours( \ D_loss_real, \ D_loss_fake, \ var_list=theta_D) # ------------------------------------------------------------------------------ # Set output directory resultDir = baseDir + "out/" if not os.path.exists(resultDir): os.makedirs(resultDir) resultPath = resultDir + "/run_{}_bs_{}_s_{}_c_{}_d_{}_e_{}".format( \ iteration, \ batch_size, \ sigma, \ clipping_value, \ FLAGS.target_delta, FLAGS.target_eps) if not os.path.exists(resultPath): os.makedirs(resultPath) target_eps = [float(s) for s in FLAGS.target_eps.split(",")] max_target_eps = max(target_eps) gpu_options = tf.GPUOptions(visible_device_list="0, 1") # Main Session with tf.Session(config=tf.ConfigProto(allow_soft_placement=True, gpu_options=gpu_options)) as sess: init = tf.initialize_all_variables() sess.run(init) step = 0 # Is true when the spent privacy budget exceeds the target budget should_terminate = False # Main loop while (step < FLAGS.num_training_steps and should_terminate == False): epoch = step curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr, \ FLAGS.lr_saturate_epochs, epoch) eps = compute_epsilon(FLAGS, (step + 1), sigma * clipping_value) # Save the generated images every 50 steps if step % 50 == 0: print("step : " + str(step) + " eps : " + str(eps)) n_sample = 10 Z_sample = sample_Z(n_sample, Z_dim) y_sample = np.zeros(shape=[n_sample, 10]) y_sample[0, 0] = 1 y_sample[1, 1] = 1 y_sample[2, 2] = 1 y_sample[3, 3] = 1 y_sample[4, 4] = 1 y_sample[5, 5] = 1 y_sample[6, 6] = 1 y_sample[7, 7] = 1 y_sample[8, 8] = 1 y_sample[9, 9] = 1 samples = sess.run(G_sample, feed_dict={ Z: Z_sample, y: y_sample }) fig = plot(samples) plt.savefig( (resultPath + "/step_{}.png").format(str(step).zfill(3)), bbox_inches='tight') plt.close(fig) X_mb, y_mb = mnist.train.next_batch(batch_size, shuffle=True) Z_sample = sample_Z(batch_size, Z_dim) # Update the discriminator network _, D_loss_real_curr, D_loss_fake_curr = sess.run([D_solver, D_loss_real, D_loss_fake], \ feed_dict={X: X_mb, \ Z: Z_sample, \ y: y_mb, \ lr: curr_lr}) # Update the generator network _, G_loss_curr = sess.run([G_solver, G_loss], feed_dict={ Z: Z_sample, y: y_mb, lr: curr_lr }) if (eps > max_target_eps): print("TERMINATE!!!!") print("Termination Step : " + str(step)) should_terminate = True for i in range(0, 10): n_sample = 10 Z_sample = sample_Z(n_sample, Z_dim) y_sample = np.zeros(shape=[n_sample, y_dim]) y_sample[0, 0] = 1 y_sample[1, 1] = 1 y_sample[2, 2] = 1 y_sample[3, 3] = 1 y_sample[4, 4] = 1 y_sample[5, 5] = 1 y_sample[6, 6] = 1 y_sample[7, 7] = 1 y_sample[8, 8] = 1 y_sample[9, 9] = 1 samples = sess.run(G_sample, feed_dict={ Z: Z_sample, y: y_sample }) fig = plot(samples) plt.savefig((resultPath + "/Final_step_{}.png").format( str(i).zfill(3)), bbox_inches='tight') plt.close(fig) n_class = np.zeros(10) n_class[0] = 5923 n_class[1] = 6742 n_class[2] = 5958 n_class[3] = 6131 n_class[4] = 5842 n_class[5] = 5421 n_class[6] = 5918 n_class[7] = 6265 n_class[8] = 5851 n_class[9] = 5949 n_image = int(sum(n_class)) image_lables = np.zeros(shape=[n_image, len(n_class)]) image_cntr = 0 for class_cntr in np.arange(len(n_class)): for cntr in np.arange(n_class[class_cntr]): image_lables[image_cntr, class_cntr] = 1 image_cntr += 1 Z_sample = sample_Z(n_image, Z_dim) images = sess.run(G_sample, feed_dict={ Z: Z_sample, y: image_lables }) X_test, Y_test = loadlocal_mnist( images_path=baseDir + "our_dp_conditional_gan_mnist/" + 'mnist_dataset/t10k-images.idx3-ubyte', labels_path=baseDir + "our_dp_conditional_gan_mnist/" + 'mnist_dataset/t10k-labels.idx1-ubyte') Y_test = [int(y) for y in Y_test] resultFile = open(resultPath + "/" + "results.txt", "w") print("Binarizing the labels ...") classes = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] Y_test = label_binarize(Y_test, classes=classes) print( "\n################# Logistic Regression #######################" ) print(" Classifying ...") Y_score = classify(images, image_lables, X_test, "lr", random_state_value=30) print(" Computing ROC ...") false_positive_rate, true_positive_rate, roc_auc = compute_fpr_tpr_roc( Y_test, Y_score) print(" AUROC: " + str(roc_auc["micro"])) resultFile.write("LR AUROC: " + str(roc_auc["micro"]) + "\n") print( "\n################# Multi-layer Perceptron #######################" ) print(" Classifying ...") Y_score = classify(images, image_lables, X_test, "mlp", random_state_value=30) print(" Computing ROC ...") false_positive_rate, true_positive_rate, roc_auc = compute_fpr_tpr_roc( Y_test, Y_score) print(" AUROC: " + str(roc_auc["micro"])) resultFile.write("MLP AUROC: " + str(roc_auc["micro"]) + "\n") step = FLAGS.num_training_steps break step = step + 1
one_hot=True) #Main Session with tf.train.SingularMonitoredSession() as sess: lot_size = FLAGS.batches_per_lot * batch_size lots_per_epoch = NUM_TRAINING_IMAGES / lot_size step = 0 # Is true when the spent privacy budget exceeds the target budget should_terminate = False #Main loop while (step < FLAGS.num_training_steps and should_terminate == False): epoch = step / lots_per_epoch curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr,\ FLAGS.lr_saturate_epochs, epoch) for _ in range(FLAGS.batches_per_lot): # Save the generated images every 100 steps if step % 100 == 0: samples = sess.run(G_sample, feed_dict={Z: sample_Z(16, Z_dim)}) print(samples.shape) fig = plot(samples) plt.savefig( (resultPath + "/step_{}.png").format(str(step).zfill(3)), bbox_inches='tight') plt.close(fig) print('Step: {}'.format(step))
def Train(cifar_train_file, mnist_test_file, network_parameters, num_steps, save_path, eval_steps=0): """Train MNIST for a number of steps. Args: cifar_train_file: path of MNIST train data file. mnist_test_file: path of MNIST test data file. network_parameters: parameters for defining and training the network. num_steps: number of steps to run. Here steps = lots save_path: path where to save trained parameters. eval_steps: evaluate the model every eval_steps. Returns: the result after the final training step. Raises: ValueError: if the accountant_type is not supported. """ batch_size = FLAGS.batch_size params = { "accountant_type": FLAGS.accountant_type, "task_id": 0, "batch_size": FLAGS.batch_size, "default_gradient_l2norm_bound": network_parameters.default_gradient_l2norm_bound, "num_hidden_layers": FLAGS.num_hidden_layers, "hidden_layer_num_units": FLAGS.hidden_layer_num_units, "num_examples": NUM_TRAINING_IMAGES, "learning_rate": FLAGS.lr, "end_learning_rate": FLAGS.end_lr, "learning_rate_saturate_epochs": FLAGS.lr_saturate_epochs } params.update({"sigma": FLAGS.sigma}) with tf.Graph().as_default(), tf.Session() as sess, tf.device('/cpu:0'): # Create the basic Cifar model. images, labels = CifarInput(cifar_train_file, batch_size, FLAGS.randomize) logits, projection, training_params = utils.BuildNetwork( images, network_parameters) cost = tf.nn.softmax_cross_entropy_with_logits(logits=logits, labels=tf.one_hot( labels, 100)) # The actual cost is the average across the examples. cost = tf.reduce_sum(cost, [0]) / batch_size priv_accountant = accountant.GaussianMomentsAccountant( NUM_TRAINING_IMAGES) sigma = FLAGS.sigma with_privacy = FLAGS.sigma > 0 with_privacy = False # Note: Here and below, we scale down the l2norm_bound by # batch_size. This is because per_example_gradients computes the # gradient of the minibatch loss with respect to each individual # example, and the minibatch loss (for our model) is the *average* # loss over examples in the minibatch. Hence, the scale of the # per-example gradients goes like 1 / batch_size. gaussian_sanitizer = sanitizer.AmortizedGaussianSanitizer( priv_accountant, [ network_parameters.default_gradient_l2norm_bound / batch_size, True ]) for var in training_params: if "gradient_l2norm_bound" in training_params[var]: l2bound = training_params[var][ "gradient_l2norm_bound"] / batch_size gaussian_sanitizer.set_option( var, sanitizer.ClipOption(l2bound, True)) lr = tf.placeholder(tf.float32) eps = tf.placeholder(tf.float32) delta = tf.placeholder(tf.float32) init_ops = [] # Add global_step global_step = tf.Variable(0, dtype=tf.int32, trainable=False, name="global_step") if with_privacy: gd_op = dp_optimizer.DPGradientDescentOptimizer( lr, [eps, delta], gaussian_sanitizer, sigma=sigma, batches_per_lot=FLAGS.batches_per_lot).minimize( cost, global_step=global_step) else: gd_op = tf.train.GradientDescentOptimizer(lr).minimize(cost) saver = tf.train.Saver() coord = tf.train.Coordinator() _ = tf.train.start_queue_runners(sess=sess, coord=coord) # We need to maintain the intialization sequence. for v in tf.trainable_variables(): sess.run(tf.variables_initializer([v])) sess.run(tf.global_variables_initializer()) sess.run(init_ops) results = [] start_time = time.time() prev_time = start_time filename = "results-0.json" log_path = os.path.join(save_path, filename) target_eps = [float(s) for s in FLAGS.target_eps.split(",")] max_target_eps = max(target_eps) lot_size = FLAGS.batches_per_lot * FLAGS.batch_size lots_per_epoch = NUM_TRAINING_IMAGES / lot_size for step in range(num_steps): epoch = step / lots_per_epoch curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr, FLAGS.lr_saturate_epochs, epoch) curr_eps = utils.VaryRate(FLAGS.eps, FLAGS.end_eps, FLAGS.eps_saturate_epochs, epoch) for _ in range(FLAGS.batches_per_lot): _ = sess.run([gd_op], feed_dict={ lr: curr_lr, eps: curr_eps, delta: FLAGS.delta }) sys.stderr.write("step: %d\n" % step) # See if we should stop training due to exceeded privacy budget: should_terminate = False terminate_spent_eps_delta = None if with_privacy and FLAGS.terminate_based_on_privacy: terminate_spent_eps_delta = priv_accountant.get_privacy_spent( sess, target_eps=[max_target_eps])[0] # For the Moments accountant, we should always have # spent_eps == max_target_eps. if (terminate_spent_eps_delta.spent_delta > FLAGS.target_delta or terminate_spent_eps_delta.spent_eps > max_target_eps): should_terminate = True if (eval_steps > 0 and (step + 1) % eval_steps == 0) or should_terminate: if with_privacy: spent_eps_deltas = priv_accountant.get_privacy_spent( sess, target_eps=target_eps) else: spent_eps_deltas = [accountant.EpsDelta(0, 0)] for spent_eps, spent_delta in spent_eps_deltas: sys.stderr.write("spent privacy: eps %.4f delta %.5g\n" % (spent_eps, spent_delta)) saver.save(sess, save_path=save_path + "/ckpt") train_accuracy, _ = Eval(cifar_train_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=True, load_path=save_path) sys.stderr.write("train_accuracy: %.2f\n" % train_accuracy) test_accuracy, mistakes = Eval( mnist_test_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=False, load_path=save_path, save_mistakes=FLAGS.save_mistakes) sys.stderr.write("eval_accuracy: %.2f\n" % test_accuracy) curr_time = time.time() elapsed_time = curr_time - prev_time prev_time = curr_time results.append({ "step": step + 1, # Number of lots trained so far. "elapsed_secs": elapsed_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "mistakes": mistakes }) loginfo = { "elapsed_secs": curr_time - start_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "num_training_steps": step + 1, # Steps so far. "mistakes": mistakes, "result_series": results } loginfo.update(params) if log_path: with tf.gfile.Open(log_path, "w") as f: json.dump(loginfo, f, indent=2) f.write("\n") f.close() if should_terminate: print("\nTERMINATING.\n") break
def Train(mnist_train_file, mnist_test_file, network_parameters, num_steps, save_path, eval_steps=0): """Train MNIST for a number of steps. Args: mnist_train_file: path of MNIST train data file. mnist_test_file: path of MNIST test data file. network_parameters: parameters for defining and training the network. num_steps: number of steps to run. Here steps = lots save_path: path where to save trained parameters. eval_steps: evaluate the model every eval_steps. Returns: the result after the final training step. Raises: ValueError: if the accountant_type is not supported. """ batch_size = FLAGS.batch_size params = { "accountant_type": FLAGS.accountant_type, "task_id": 0, "batch_size": FLAGS.batch_size, "projection_dimensions": FLAGS.projection_dimensions, "default_gradient_l2norm_bound": network_parameters.default_gradient_l2norm_bound, "num_hidden_layers": FLAGS.num_hidden_layers, "hidden_layer_num_units": FLAGS.hidden_layer_num_units, "num_examples": NUM_TRAINING_IMAGES, "learning_rate": FLAGS.lr, "end_learning_rate": FLAGS.end_lr, "learning_rate_saturate_epochs": FLAGS.lr_saturate_epochs } # Log different privacy parameters dependent on the accountant type. if FLAGS.accountant_type == "Amortized": params.update({ "flag_eps": FLAGS.eps, "flag_delta": FLAGS.delta, "flag_pca_eps": FLAGS.pca_eps, "flag_pca_delta": FLAGS.pca_delta, }) elif FLAGS.accountant_type == "Moments": params.update({ "sigma": FLAGS.sigma, "pca_sigma": FLAGS.pca_sigma, }) with tf.Graph().as_default(), tf.Session() as sess, tf.device('/cpu:0'): # Create the basic Mnist model. images, labels = MnistInput(mnist_train_file, batch_size, FLAGS.randomize) logits, projection, training_params = utils.BuildNetwork( images, network_parameters) cost = tf.nn.softmax_cross_entropy_with_logits(logits=logits, labels=tf.one_hot( labels, 10)) # The actual cost is the average across the examples. cost = tf.reduce_sum(cost, [0]) / batch_size if FLAGS.accountant_type == "Amortized": priv_accountant = accountant.AmortizedAccountant( NUM_TRAINING_IMAGES) sigma = None pca_sigma = None with_privacy = FLAGS.eps > 0 elif FLAGS.accountant_type == "Moments": priv_accountant = accountant.GaussianMomentsAccountant( NUM_TRAINING_IMAGES) sigma = FLAGS.sigma pca_sigma = FLAGS.pca_sigma with_privacy = FLAGS.sigma > 0 else: raise ValueError("Undefined accountant type, needs to be " "Amortized or Moments, but got %s" % FLAGS.accountant) # Note: Here and below, we scale down the l2norm_bound by # batch_size. This is because per_example_gradients computes the # gradient of the minibatch loss with respect to each individual # example, and the minibatch loss (for our model) is the *average* # loss over examples in the minibatch. Hence, the scale of the # per-example gradients goes like 1 / batch_size. gaussian_sanitizer = sanitizer.AmortizedGaussianSanitizer( priv_accountant, [ network_parameters.default_gradient_l2norm_bound / batch_size, True ]) for var in training_params: if "gradient_l2norm_bound" in training_params[var]: l2bound = training_params[var][ "gradient_l2norm_bound"] / batch_size gaussian_sanitizer.set_option( var, sanitizer.ClipOption(l2bound, True)) lr = tf.placeholder(tf.float32) eps = tf.placeholder(tf.float32) delta = tf.placeholder(tf.float32) init_ops = [] if network_parameters.projection_type == "PCA": with tf.variable_scope("pca"): # Compute differentially private PCA. all_data, _ = MnistInput(mnist_train_file, NUM_TRAINING_IMAGES, False) pca_projection = dp_pca.ComputeDPPrincipalProjection( all_data, network_parameters.projection_dimensions, gaussian_sanitizer, [FLAGS.pca_eps, FLAGS.pca_delta], pca_sigma) assign_pca_proj = tf.assign(projection, pca_projection) init_ops.append(assign_pca_proj) # Add global_step global_step = tf.Variable(0, dtype=tf.int32, trainable=False, name="global_step") if with_privacy: gd_op = dp_optimizer.DPGradientDescentOptimizer( lr, [eps, delta], gaussian_sanitizer, sigma=sigma, batches_per_lot=FLAGS.batches_per_lot).minimize( cost, global_step=global_step) else: gd_op = tf.train.GradientDescentOptimizer(lr).minimize(cost) saver = tf.train.Saver() coord = tf.train.Coordinator() _ = tf.train.start_queue_runners(sess=sess, coord=coord) # We need to maintain the intialization sequence. for v in tf.trainable_variables(): sess.run(tf.variables_initializer([v])) sess.run(tf.global_variables_initializer()) sess.run(init_ops) results = [] start_time = time.time() prev_time = start_time filename = "results-0.json" log_path = os.path.join(save_path, filename) target_eps = [float(s) for s in FLAGS.target_eps.split(",")] if FLAGS.accountant_type == "Amortized": # Only matters if --terminate_based_on_privacy is true. target_eps = [max(target_eps)] max_target_eps = max(target_eps) lot_size = FLAGS.batches_per_lot * FLAGS.batch_size lots_per_epoch = NUM_TRAINING_IMAGES / lot_size for step in xrange(num_steps): epoch = step / lots_per_epoch curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr, FLAGS.lr_saturate_epochs, epoch) curr_eps = utils.VaryRate(FLAGS.eps, FLAGS.end_eps, FLAGS.eps_saturate_epochs, epoch) for _ in xrange(FLAGS.batches_per_lot): _ = sess.run([gd_op], feed_dict={ lr: curr_lr, eps: curr_eps, delta: FLAGS.delta }) sys.stderr.write("step: %d\n" % step) # See if we should stop training due to exceeded privacy budget: should_terminate = False terminate_spent_eps_delta = None if with_privacy and FLAGS.terminate_based_on_privacy: terminate_spent_eps_delta = priv_accountant.get_privacy_spent( sess, target_eps=[max_target_eps])[0] # For the Moments accountant, we should always have # spent_eps == max_target_eps. if (terminate_spent_eps_delta.spent_delta > FLAGS.target_delta or terminate_spent_eps_delta.spent_eps > max_target_eps): should_terminate = True if (eval_steps > 0 and (step + 1) % eval_steps == 0) or should_terminate: if with_privacy: spent_eps_deltas = priv_accountant.get_privacy_spent( sess, target_eps=target_eps) else: spent_eps_deltas = [accountant.EpsDelta(0, 0)] for spent_eps, spent_delta in spent_eps_deltas: sys.stderr.write("spent privacy: eps %.4f delta %.5g\n" % (spent_eps, spent_delta)) saver.save(sess, save_path=save_path + "/ckpt") train_accuracy, _ = Eval(mnist_train_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=True, load_path=save_path) sys.stderr.write("train_accuracy: %.2f\n" % train_accuracy) test_accuracy, mistakes = Eval( mnist_test_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=False, load_path=save_path, save_mistakes=FLAGS.save_mistakes) sys.stderr.write("eval_accuracy: %.2f\n" % test_accuracy) curr_time = time.time() elapsed_time = curr_time - prev_time prev_time = curr_time results.append({ "step": step + 1, # Number of lots trained so far. "elapsed_secs": elapsed_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "mistakes": mistakes }) loginfo = { "elapsed_secs": curr_time - start_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "num_training_steps": step + 1, # Steps so far. "mistakes": mistakes, "result_series": results } loginfo.update(params) if log_path: with tf.gfile.Open(log_path, "w") as f: json.dump(loginfo, f, indent=2) f.write("\n") f.close() if should_terminate: break network_parameters = utils.NetworkParameters() # If the ASCII proto isn't specified, then construct a config protobuf based # on 3 flags. network_parameters.input_size = IMAGE_SIZE**2 network_parameters.default_gradient_l2norm_bound = ( FLAGS.default_gradient_l2norm_bound) if FLAGS.projection_dimensions > 0 and FLAGS.num_conv_layers > 0: raise ValueError("Currently you can't do PCA and have convolutions" "at the same time. Pick one") # could add support for PCA after convolutions. # Currently BuildNetwork can build the network with conv followed by # projection, but the PCA training works on data, rather than data run # through a few layers. Will need to init the convs before running the # PCA, and need to change the PCA subroutine to take a network and perhaps # allow for batched inputs, to handle larger datasets. if FLAGS.num_conv_layers > 0: conv = utils.ConvParameters() conv.name = "conv1" conv.in_channels = 1 conv.out_channels = 128 conv.num_outputs = 128 * 14 * 14 network_parameters.conv_parameters.append(conv) # defaults for the rest: 5x5,stride 1, relu, maxpool 2x2,stride 2. # insize 28x28, bias, stddev 0.1, non-trainable. if FLAGS.num_conv_layers > 1: conv = network_parameters.ConvParameters() conv.name = "conv2" conv.in_channels = 128 conv.out_channels = 128 conv.num_outputs = 128 * 7 * 7 conv.in_size = 14 # defaults for the rest: 5x5,stride 1, relu, maxpool 2x2,stride 2. # bias, stddev 0.1, non-trainable. network_parameters.conv_parameters.append(conv) if FLAGS.num_conv_layers > 2: raise ValueError( "Currently --num_conv_layers must be 0,1 or 2." "Manually create a network_parameters proto for more.") if FLAGS.projection_dimensions > 0: network_parameters.projection_type = "PCA" network_parameters.projection_dimensions = FLAGS.projection_dimensions for i in xrange(FLAGS.num_hidden_layers): hidden = utils.LayerParameters() hidden.name = "hidden%d" % i hidden.num_units = FLAGS.hidden_layer_num_units hidden.relu = True hidden.with_bias = False hidden.trainable = not FLAGS.freeze_bottom_layers network_parameters.layer_parameters.append(hidden) logits = utils.LayerParameters() logits.name = "logits" logits.num_units = 10 logits.relu = False logits.with_bias = False network_parameters.layer_parameters.append(logits) inputs = tf.placeholder(tf.float32, [None, 784], name='inputs') outputs, _, _ = utils.BuildNetwork(inputs, network_parameters)
def Train(mnist_train_file, mnist_test_file, mnist_validation_file, network_parameters, num_steps, save_path, total_rho, eval_steps=0): """Train MNIST for a number of steps. Args: mnist_train_file: path of MNIST train data file. mnist_test_file: path of MNIST test data file. network_parameters: parameters for defining and training the network. num_steps: number of steps to run. Here steps = lots save_path: path where to save trained parameters. eval_steps: evaluate the model every eval_steps. Returns: the result after the final training step. Raises: ValueError: if the accountant_type is not supported. """ batch_size = FLAGS.batch_size params = { "accountant_type": FLAGS.accountant_type, "task_id": 0, "batch_size": FLAGS.batch_size, "projection_dimensions": FLAGS.projection_dimensions, "default_gradient_l2norm_bound": network_parameters.default_gradient_l2norm_bound, "num_hidden_layers": FLAGS.num_hidden_layers, "hidden_layer_num_units": FLAGS.hidden_layer_num_units, "num_examples": NUM_TRAINING_IMAGES, "learning_rate": FLAGS.lr, "end_learning_rate": FLAGS.end_lr, "learning_rate_saturate_epochs": FLAGS.lr_saturate_epochs } # Log different privacy parameters dependent on the accountant type. if FLAGS.accountant_type == "Amortized": params.update({ "flag_eps": FLAGS.eps, "flag_delta": FLAGS.delta, "flag_pca_eps": FLAGS.pca_eps, "flag_pca_delta": FLAGS.pca_delta, }) elif FLAGS.accountant_type == "Moments": params.update({ "sigma": FLAGS.sigma, "pca_sigma": FLAGS.pca_sigma, }) elif FLAGS.accountant_type == "zCDP": params.update() with tf.device('/gpu:0'), tf.Graph().as_default(), tf.Session() as sess: # Create the basic Mnist model. images, labels = MnistInput(mnist_train_file, batch_size, FLAGS.randomize) logits, projection, training_params = utils.BuildNetwork( images, network_parameters) cost = tf.nn.softmax_cross_entropy_with_logits(logits=logits, labels=tf.one_hot( labels, 10)) # The actual cost is the average across the examples. cost = tf.reduce_sum(cost, [0]) / batch_size if FLAGS.accountant_type == "Amortized": priv_accountant = accountant.AmortizedAccountant( NUM_TRAINING_IMAGES) sigma = None pca_sigma = None with_privacy = FLAGS.eps > 0 elif FLAGS.accountant_type == "Moments": priv_accountant = accountant.GaussianMomentsAccountant( NUM_TRAINING_IMAGES) sigma = FLAGS.sigma pca_sigma = FLAGS.pca_sigma with_privacy = FLAGS.sigma > 0 elif FLAGS.accountant_type == "ZCDP": priv_accountant = accountant.DumpzCDPAccountant() else: raise ValueError("Undefined accountant type, needs to be " "Amortized or Moments, but got %s" % FLAGS.accountant) # Note: Here and below, we scale down the l2norm_bound by # batch_size. This is because per_example_gradients computes the # gradient of the minibatch loss with respect to each individual # example, and the minibatch loss (for our model) is the *average* # loss over examples in the minibatch. Hence, the scale of the # per-example gradients goes like 1 / batch_size. gaussian_sanitizer = sanitizer.AmortizedGaussianSanitizer( priv_accountant, [ network_parameters.default_gradient_l2norm_bound / batch_size, True ]) for var in training_params: if "gradient_l2norm_bound" in training_params[var]: l2bound = training_params[var][ "gradient_l2norm_bound"] / batch_size gaussian_sanitizer.set_option( var, sanitizer.ClipOption(l2bound, True)) lr = tf.placeholder(tf.float32) eps = tf.placeholder(tf.float32) delta = tf.placeholder(tf.float32) varsigma = tf.placeholder(tf.float32, shape=[]) init_ops = [] if network_parameters.projection_type == "PCA": with tf.variable_scope("pca"): # Compute differentially private PCA. all_data, _ = MnistInput(mnist_train_file, NUM_TRAINING_IMAGES, False) pca_projection = dp_pca.ComputeDPPrincipalProjection( all_data, network_parameters.projection_dimensions, gaussian_sanitizer, [FLAGS.pca_eps, FLAGS.pca_delta], pca_sigma) assign_pca_proj = tf.assign(projection, pca_projection) init_ops.append(assign_pca_proj) # Add global_step global_step = tf.Variable(0, dtype=tf.int32, trainable=False, name="global_step") with_privacy = True if with_privacy: gd_op = dp_optimizer.DPGradientDescentOptimizer( lr, [eps, delta], gaussian_sanitizer, varsigma, batches_per_lot=FLAGS.batches_per_lot).minimize( cost, global_step=global_step) else: print("No privacy") gd_op = tf.train.GradientDescentOptimizer(lr).minimize(cost) saver = tf.train.Saver() coord = tf.train.Coordinator() _ = tf.train.start_queue_runners(sess=sess, coord=coord) # We need to maintain the intialization sequence. for v in tf.trainable_variables(): sess.run(tf.variables_initializer([v])) sess.run(tf.global_variables_initializer()) sess.run(init_ops) results = [] start_time = time.time() prev_time = start_time filename = "results" + datetime.datetime.now().strftime( '%Y-%m-%d-%H-%M-%S') + ".json" log_path = os.path.join(save_path, filename) target_eps = [float(s) for s in FLAGS.target_eps.split(",")] if FLAGS.accountant_type == "Amortized": # Only matters if --terminate_based_on_privacy is true. target_eps = [max(target_eps)] max_target_eps = max(target_eps) lot_size = FLAGS.batches_per_lot * FLAGS.batch_size lots_per_epoch = NUM_TRAINING_IMAGES / lot_size # previous_epoch = -1 rho_tracking = [0] validation_accuracy_list = [] previous_validaccuracy = 0 tracking_sigma = [] curr_sigma = 10 # total budget rhototal = total_rho for step in range(num_steps): epoch = step // np.ceil(lots_per_epoch) curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr, FLAGS.lr_saturate_epochs, epoch) curr_eps = utils.VaryRate(FLAGS.eps, FLAGS.end_eps, FLAGS.eps_saturate_epochs, epoch) old_sigma = curr_sigma #validation based decay #period=10, threshold=0.01, decay_factor=0.9 period = 10 decay_factor = 0.8 threshold = 0.01 m = 5 if epoch - previous_epoch == 1 and ( epoch + 1) % period == 0: #checking epoch current_validaccuracy = sum(validation_accuracy_list[-m:]) / m if current_validaccuracy - previous_validaccuracy < threshold: curr_sigma = decay_factor * curr_sigma previous_validaccuracy = current_validaccuracy if old_sigma != curr_sigma: print(curr_sigma) #for tracking by epoch if epoch - previous_epoch == 1: tracking_sigma.append(curr_sigma) rho_tracking.append(rho_tracking[-1] + 1 / (2.0 * curr_sigma**2)) previous_epoch = epoch if with_privacy == True and rho_tracking[-1] > rhototal: print("stop at epoch%d" % epoch) break print(rho_tracking) print(rho_tracking) print(tracking_sigma) for _ in range(FLAGS.batches_per_lot): _ = sess.run( [gd_op], feed_dict={ lr: curr_lr, eps: curr_eps, delta: FLAGS.delta, varsigma: curr_sigma }) sys.stderr.write("step: %d\n" % step) # See if we should stop training due to exceeded privacy budget: should_terminate = False terminate_spent_eps_delta = None if with_privacy and FLAGS.terminate_based_on_privacy: terminate_spent_eps_delta = priv_accountant.get_privacy_spent( sess, target_eps=[max_target_eps])[0] # For the Moments accountant, we should always have # spent_eps == max_target_eps. if (terminate_spent_eps_delta.spent_delta > FLAGS.target_delta or terminate_spent_eps_delta.spent_eps > max_target_eps): should_terminate = True if (eval_steps > 0 and (step + 1) % eval_steps == 0) or should_terminate: if with_privacy: spent_eps_deltas = priv_accountant.get_privacy_spent( sess, target_eps=target_eps) print(spent_eps_deltas) else: spent_eps_deltas = [accountant.EpsDelta(0, 0)] for spent_eps, spent_delta in spent_eps_deltas: sys.stderr.write("spent privacy: eps %.4f delta %.5g\n" % (spent_eps, spent_delta)) saver.save(sess, save_path=save_path + "/ckpt") train_accuracy, _ = Eval(mnist_train_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=True, load_path=save_path) sys.stderr.write("train_accuracy: %.2f\n" % train_accuracy) test_accuracy, mistakes = Eval( mnist_test_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=False, load_path=save_path, save_mistakes=FLAGS.save_mistakes) sys.stderr.write("eval_accuracy: %.2f\n" % test_accuracy) validation_accuracy, mistakes = Eval( mnist_validation_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=False, load_path=save_path, save_mistakes=FLAGS.save_mistakes) sys.stderr.write("validation_accuracy: %.2f\n" % validation_accuracy) validation_accuracy_list.append(validation_accuracy) curr_time = time.time() elapsed_time = curr_time - prev_time prev_time = curr_time results.append({ "step": step + 1, # Number of lots trained so far. "elapsed_secs": elapsed_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "mistakes": mistakes }) loginfo = { "elapsed_secs": curr_time - start_time, "spent_eps_deltas": spent_eps_deltas, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "num_training_steps": step + 1, # Steps so far. "mistakes": mistakes, "result_series": results } loginfo.update(params) if log_path: with tf.gfile.Open(log_path, "w") as f: json.dump(loginfo, f, indent=2) f.write("\n") f.close() if should_terminate: break
def Train(train_file, test_file, network_parameters, num_steps, save_path, total_rho, eval_steps=0): """Train MNIST for a number of steps. Args: mnist_train_file: path of MNIST train data file. mnist_test_file: path of MNIST test data file. network_parameters: parameters for defining and training the network. num_steps: number of steps to run. Here steps = lots save_path: path where to save trained parameters. eval_steps: evaluate the model every eval_steps. Returns: the result after the final training step. Raises: ValueError: if the accountant_type is not supported. """ batch_size = NUM_TRAINING_IMAGES params = { "accountant_type": FLAGS.accountant_type, "task_id": 0, "batch_size": FLAGS.batch_size, "default_gradient_l2norm_bound": network_parameters.default_gradient_l2norm_bound, "num_examples": NUM_TRAINING_IMAGES, "learning_rate": FLAGS.lr, "end_learning_rate": FLAGS.end_lr, "learning_rate_saturate_epochs": FLAGS.lr_saturate_epochs } # Log different privacy parameters dependent on the accountant type. if FLAGS.accountant_type == "Amortized": params.update({ "flag_eps": FLAGS.eps, "flag_delta": FLAGS.delta, }) elif FLAGS.accountant_type == "Moments": params.update({ "sigma": FLAGS.sigma, }) with tf.device('/gpu:0'), tf.Graph().as_default(), tf.Session() as sess: #print_csv_tfrecords.print_tfrecords(train_file) features, labels = DataInput(train_file, batch_size, False) print("network_parameters.input_size", network_parameters.input_size) logits, projection, training_params = utils.BuildNetwork( features, network_parameters) cost = tf.nn.softmax_cross_entropy_with_logits(logits=logits, labels=tf.one_hot( labels, LABEL_SIZE)) # The actual cost is the average across the examples. cost = tf.reduce_sum(cost, [0]) / batch_size if FLAGS.accountant_type == "Amortized": priv_accountant = accountant.AmortizedAccountant( NUM_TRAINING_IMAGES) sigma = None elif FLAGS.accountant_type == "Moments": priv_accountant = accountant.GaussianMomentsAccountant( NUM_TRAINING_IMAGES) sigma = FLAGS.sigma elif FLAGS.accountant_type == "ZDCP": priv_accountant = accountant.DumpzCDPAccountant() else: raise ValueError("Undefined accountant type, needs to be " "Amortized or Moments, but got %s" % FLAGS.accountant) # Note: Here and below, we scale down the l2norm_bound by # batch_size. This is because per_example_gradients computes the # gradient of the minibatch loss with respect to each individual # example, and the minibatch loss (for our model) is the *average* # loss over examples in the minibatch. Hence, the scale of the # per-example gradients goes like 1 / batch_size. gaussian_sanitizer = sanitizer.AmortizedGaussianSanitizer( priv_accountant, [ network_parameters.default_gradient_l2norm_bound / batch_size, True ]) for var in training_params: if "gradient_l2norm_bound" in training_params[var]: l2bound = training_params[var][ "gradient_l2norm_bound"] / batch_size gaussian_sanitizer.set_option( var, sanitizer.ClipOption(l2bound, True)) lr = tf.placeholder(tf.float32) eps = tf.placeholder(tf.float32) delta = tf.placeholder(tf.float32) varsigma = tf.placeholder(tf.float32, shape=[]) init_ops = [] # Add global_step global_step = tf.Variable(0, dtype=tf.int32, trainable=False, name="global_step") with_privacy = True if with_privacy: gd_op = dp_optimizer.DPGradientDescentOptimizer( lr, [eps, delta], gaussian_sanitizer, varsigma, batches_per_lot=FLAGS.batches_per_lot).minimize( cost, global_step=global_step) else: print("No privacy") gd_op = tf.train.GradientDescentOptimizer(lr).minimize(cost) saver = tf.train.Saver() coord = tf.train.Coordinator() _ = tf.train.start_queue_runners(sess=sess, coord=coord) # We need to maintain the intialization sequence. for v in tf.trainable_variables(): sess.run(tf.variables_initializer([v])) sess.run(tf.global_variables_initializer()) sess.run(init_ops) results = [] start_time = time.time() prev_time = start_time filename = "results-0.json" log_path = os.path.join(save_path, filename) target_eps = [float(s) for s in FLAGS.target_eps.split(",")] if FLAGS.accountant_type == "Amortized": # Only matters if --terminate_based_on_privacy is true. target_eps = [max(target_eps)] max_target_eps = max(target_eps) lot_size = FLAGS.batches_per_lot * FLAGS.batch_size lots_per_epoch = NUM_TRAINING_IMAGES / lot_size curr_sigma = 0 previous_epoch = -1 rho_tracking = [0] for step in range(num_steps): epoch = step // lots_per_epoch curr_lr = utils.VaryRate(FLAGS.lr, FLAGS.end_lr, FLAGS.lr_saturate_epochs, epoch) curr_eps = utils.VaryRate(FLAGS.eps, FLAGS.end_eps, FLAGS.eps_saturate_epochs, epoch) if with_privacy: old_sigma = curr_sigma #total budget rhototal = total_rho curr_sigma = get_current_sigma(epoch) if step % 100 == 0: print(curr_sigma) print(rho_tracking[-1]) if epoch - previous_epoch == 1: rho_tracking.append(rho_tracking[-1] + 1.0 / (2.0 * curr_sigma**2)) previous_epoch = epoch if with_privacy == True and rho_tracking[-1] > rhototal: print("stop at epoch%d" % epoch) print(rho_tracking[:-1]) break for _ in range(FLAGS.batches_per_lot): _ = sess.run( [gd_op], feed_dict={ lr: curr_lr, eps: curr_eps, delta: FLAGS.delta, varsigma: curr_sigma }) sys.stderr.write("step: %d\n" % step) # See if we should stop training due to exceeded privacy budget: should_terminate = False if (eval_steps > 0 and (step + 1) % eval_steps == 0) or should_terminate: saver.save(sess, save_path=save_path + "/ckpt") train_accuracy, _ = Eval( train_file, network_parameters, num_testing_images=NUM_TRAINING_IMAGES, randomize=False, load_path=save_path) sys.stderr.write("train_accuracy: %.2f\n" % train_accuracy) test_accuracy, mistakes = Eval( test_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=False, load_path=save_path, save_mistakes=FLAGS.save_mistakes) sys.stderr.write("eval_accuracy: %.2f\n" % test_accuracy) curr_time = time.time() elapsed_time = curr_time - prev_time prev_time = curr_time results.append({ "step": step + 1, # Number of lots trained so far. "elapsed_secs": elapsed_time, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "mistakes": mistakes }) loginfo = { "elapsed_secs": curr_time - start_time, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "num_training_steps": step + 1, # Steps so far. "mistakes": mistakes, "result_series": results } loginfo.update(params) if log_path: with tf.gfile.Open(log_path, "w") as f: json.dump(loginfo, f, indent=2) f.write("\n") f.close() if should_terminate: break print(rho_tracking[:-1]) saver.save(sess, save_path=save_path + "/ckpt") train_accuracy, _ = Eval(train_file, network_parameters, num_testing_images=NUM_TRAINING_IMAGES, randomize=False, load_path=save_path) sys.stderr.write("train_accuracy: %.2f\n" % train_accuracy) test_accuracy, mistakes = Eval(test_file, network_parameters, num_testing_images=NUM_TESTING_IMAGES, randomize=False, load_path=save_path, save_mistakes=FLAGS.save_mistakes) sys.stderr.write("eval_accuracy: %.2f\n" % test_accuracy) curr_time = time.time() elapsed_time = curr_time - prev_time prev_time = curr_time results.append({ "step": step + 1, # Number of lots trained so far. "elapsed_secs": elapsed_time, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "mistakes": mistakes }) loginfo = { "elapsed_secs": curr_time - start_time, "train_accuracy": train_accuracy, "test_accuracy": test_accuracy, "num_training_steps": step, # Steps so far. "mistakes": mistakes, "result_series": results } loginfo.update(params) if log_path: with tf.gfile.Open(log_path, "w") as f: json.dump(loginfo, f, indent=2) f.write("\n") f.close()