''' This file is AGPL-licensed. Some of the code in this file is from Clover Edition: https://github.com/cloveranon/Clover-Edition/blob/master/aidungeon/gpt2generator.py The license for Clover Edition is shown below: Copyright (c) 2019 Nick Walton Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ''' import multiprocessing from typing import Any, Callable, Dict, List, Optional, Tuple, TypeVar import progressbar import time import os import sys import json import zipfile import requests import random import jax import jax.dlpack from jax.config import config from jax.experimental import maps import jax.numpy as jnp import numpy as np import optax import haiku as hk from transformers import AutoTokenizer, GPT2TokenizerFast, AutoModelForCausalLM, GPTNeoForCausalLM from tokenizers import Tokenizer from mesh_transformer.checkpoint import read_ckpt_lowmem from mesh_transformer.transformer_shard import CausalTransformer, CausalTransformerShard, PlaceholderTensor from mesh_transformer.util import to_bf16 params: Dict[str, Any] = {} def warper_callback(logits) -> np.array: raise NotImplementedError("`tpu_mtj_backend.warper_callback()` needs to be defined") def stopping_callback(generated, n_generated, excluded_world_info) -> Tuple[List[set], bool, bool]: raise NotImplementedError("`tpu_mtj_backend.stopping_callback()` needs to be defined") def settings_callback() -> dict: return { "top_p": 0.9, "temp": 0.5, "top_k": 0, "tfs": 1.0, "typical": 1.0, "repetition_penalty": 1.0, "rpslope": 0.0, "rprange": 0, } def started_compiling_callback() -> None: pass def stopped_compiling_callback() -> None: pass def compiling_callback() -> None: pass def show_spinner(): bar = progressbar.ProgressBar(max_value=progressbar.UnknownLength, widgets=[progressbar.Timer(), ' ', progressbar.BouncingBar(left='[', right=']', marker='█')]) i = 0 while True: bar.update(i) time.sleep(0.1) i += 1 __F = TypeVar("__F", bound=Callable) __T = TypeVar("__T") def __move_xmap(f: __F, out_axis: str) -> __F: return maps.xmap( f, in_axes=(["shard", ...], ["batch", ...]), out_axes=[out_axis, ...], axis_resources={'shard': 'mp', 'batch': 'dp'}, ) def __shard_xmap(batch_dim=1): xmap = __move_xmap(lambda s, b: s, "shard") def inner(x: __T) -> __T: return xmap(x, np.empty(batch_dim)) return inner def __batch_xmap(shard_dim=1): xmap = __move_xmap(lambda s, b: b, "batch") def inner(x: __T) -> __T: return xmap(np.empty(shard_dim), x) return inner def apply_repetition_penalty_dynamic(logits, tokens, repetition_penalty, generated_index, gen_length, rpslope, rprange): ''' This gets called by generate_loop_fn to apply repetition penalty to the 1D array logits using the provided 1D array of tokens to penalize ''' tokens = np.minimum(tokens, params["n_vocab"]-1) # https://github.com/google/jax/issues/3774 rpslope = np.int32(rpslope) rprange = np.int32(rprange) clipped_rprange = rprange if rprange > 0 else tokens.shape[-1] penalty_arange = np.roll(np.arange(tokens.shape[-1]) + (clipped_rprange - tokens.shape[-1]), generated_index, axis=-1) # Make a new array with the same length as the tokens array but with # each element replaced by the value at the corresponding index in the # logits array; e.g. # if logits is [77, 5, 3, 98] and tokens is [0, 1, 2, 3, 2, 3, 1], # then penalty_logits will be [77, 5, 3, 98, 3, 98, 5] penalty_logits = np.take(logits, tokens) # Repetition penalty slope if rpslope != 0.0 and rprange > 0: _penalty = (penalty_arange/(rprange - 1)) * 2 - 1 _penalty = (rpslope * _penalty) / (1 + np.abs(_penalty) * (rpslope - 1)) _penalty = 1 + ((_penalty + 1) / 2) * (repetition_penalty - 1) repetition_penalty = _penalty # Divide positive values by repetition_penalty and multiply negative # values by repetition_penalty (the academic publication that described # this technique actually just only divided, but that would cause tokens # with negative logits to become more likely, which is obviously wrong) penalty_logits = np.where( penalty_arange >= 0, np.where( penalty_logits > 0, penalty_logits/repetition_penalty, penalty_logits*repetition_penalty, ), penalty_logits, ) # Finally, put those penalized logit values back into their original # positions in the logits array logits[tokens] = penalty_logits return logits def kobold_sample_dynamic(key, logits, top_p=0.9, temp=0.5, top_k=0, tfs=1.0, typical=1.0): ''' This gets called by generate_loop_fn to apply a series of 5 filters to the logits (top-k, then top-p, then TFS, then typical, then temperature) before picking one token using the modified logits ''' # Top-k (keep only the k tokens with the highest logits and remove # the rest, by setting their logits to negative infinity) def top_k_filter(logits): # After sorting the logits array in descending order, # sorted_indices_to_remove is a 1D array that is True for tokens # in the sorted logits array we want to remove and False for ones # we want to keep, in this case the first top_k elements will be # False and the rest will be True sorted_indices_to_remove = np.arange(len(logits)) >= top_k # Unsort the logits array back to its original configuration and # remove tokens we need to remove _, indices_to_remove = jax.lax.sort_key_val( np.argsort(-logits), sorted_indices_to_remove, ) return np.where(indices_to_remove, -np.inf, logits) if top_k > 0: logits = top_k_filter(logits) # Top-p (after sorting the remaining tokens again in descending order of # logit, remove the ones that have cumulative softmax probability # greater than p) def top_p_filter(logits): # Sort the logits array in descending order, replace every element # with e (Euler's number) to the power of that element, and divide # each element of the new array by the sum of the elements in the # new array sorted_logits = -np.sort(-logits) probabilities = np.array(jax.nn.softmax(sorted_logits), copy=True) # Calculate cumulative_probabilities as the prefix-sum array of # probabilities cumulative_probabilities = np.cumsum(probabilities, axis=-1) # We want to remove tokens with cumulative probability higher # than top_p sorted_indices_to_remove = cumulative_probabilities > top_p # Don't ever remove the token with the highest logit, even if # the probability is higher than top_p sorted_indices_to_remove[0] = False # Unsort and remove _, indices_to_remove = jax.lax.sort_key_val( np.argsort(-logits), sorted_indices_to_remove, ) return np.where(indices_to_remove, -np.inf, logits) if top_p < 1.0: logits = top_p_filter(logits) # Tail free sampling (basically top-p a second time on remaining tokens # except it's the "cumulative normalized absolute second finite # differences of the softmax probabilities" instead of just the # cumulative softmax probabilities) def tail_free_filter(logits): # Sort in descending order sorted_logits = -np.sort(-logits) # Softmax again probabilities = np.array(jax.nn.softmax(sorted_logits), copy=True) # Calculate the second finite differences of that array (i.e. # calculate the difference array and then calculate the difference # array of the difference array) d2 = np.diff(np.diff(probabilities)) # Get the absolute values of all those second finite differences d2 = np.abs(d2) # Normalize (all elements in the array are divided by the sum of the # array's elements) d2 = d2 / d2.sum(axis=-1, keepdims=True) # Get the prefix-sum array cumulative_d2 = np.cumsum(d2, axis=-1) # We will remove the tokens with a cumulative normalized absolute # second finite difference larger than the TFS value sorted_indices_to_remove = cumulative_d2 > tfs # Don't remove the token with the highest logit sorted_indices_to_remove[0] = False # Since the d2 array has two fewer elements than the logits array, # we'll add two extra Trues to the end sorted_indices_to_remove = np.pad( sorted_indices_to_remove, (0, 2), constant_values=True, ) # Unsort and remove _, indices_to_remove = jax.lax.sort_key_val( np.argsort(-logits), sorted_indices_to_remove, ) return np.where(indices_to_remove, -np.inf, logits) if tfs < 1.0: logits = tail_free_filter(logits) # Typical sampling (https://arxiv.org/pdf/2202.00666.pdf) def typical_filter(logits): # Compute softmax probabilities and the natural logarithms of them probs = jax.nn.softmax(logits) with np.errstate(divide="ignore"): log_probs = np.log(probs) # Compute the negative of entropy, which is the sum of p*ln(p) for all p # in the set of softmax probabilities of the logits neg_entropy = np.nansum(probs * log_probs, axis=-1, keepdims=True) # Determine absolute difference between the negative entropy and the # log probabilities entropy_deviation = np.abs(neg_entropy - log_probs) # Keep certain tokens such that the sum of the entropy_deviation of the # kept tokens is the smallest possible value such that the sum of the # softmax probabilities of the kept tokens is at least the threshold # value (by sorting the tokens in ascending order of entropy_deviation # and then keeping the smallest possible number of tokens from the # beginning such that sum of softmax probabilities is at or above the # threshold) _, sorted_logits = jax.lax.sort_key_val(entropy_deviation, probs) sorted_indices_to_remove = np.cumsum(sorted_logits, axis=-1) >= typical sorted_indices_to_remove = np.roll(sorted_indices_to_remove, 1, axis=-1) sorted_indices_to_remove[0] = False # Unsort and remove _, indices_to_remove = jax.lax.sort_key_val( jnp.argsort(entropy_deviation), sorted_indices_to_remove, ) return np.where(indices_to_remove, -jnp.inf, logits) if typical < 1.0: logits = typical_filter(logits) # Temperature (just divide the logits by the temperature) logits /= temp # Finally, pick one token using the softmax thingy again (it gives # an array whose elements sum to 1 so it can be used nicely as a # probability distribution) return jax.random.categorical(key, logits, -1).astype(np.uint32) def apply_repetition_penalty_static(logits, tokens, repetition_penalty, generated_index, gen_length, rpslope, rprange): ''' This gets called by generate_loop_fn to apply repetition penalty to the 1D array logits using the provided 1D array of tokens to penalize ''' rpslope = jnp.int32(rpslope) rprange = jnp.int32(rprange) clipped_rprange = jax.lax.cond(rprange > 0, lambda x: x, lambda x: tokens.shape[-1], rprange) penalty_arange = jnp.roll(jnp.arange(tokens.shape[-1]) + (clipped_rprange - tokens.shape[-1]), generated_index, axis=-1) # Make a new array with the same length as the tokens array but with # each element replaced by the value at the corresponding index in the # logits array; e.g. # if logits is [77, 5, 3, 98] and tokens is [0, 1, 2, 3, 2, 3, 1], # then penalty_logits will be [77, 5, 3, 98, 3, 98, 5] penalty_logits = jnp.take(logits, tokens) # Repetition penalty slope def apply_slope(carry): repetition_penalty, rprange = carry _penalty = (penalty_arange/(rprange - 1)) * 2 - 1 _penalty = (rpslope * _penalty) / (1 + jnp.abs(_penalty) * (rpslope - 1)) _penalty = 1 + ((_penalty + 1) / 2) * (repetition_penalty - 1) return _penalty repetition_penalty = jax.lax.cond( (rpslope != 0.0) & (rprange > 0), # Not a typo; do not use `and` here, it makes JAX crash apply_slope, lambda carry: jnp.full(tokens.shape, carry[0]), (repetition_penalty, rprange), ) # Divide positive values by repetition_penalty and multiply negative # values by repetition_penalty (the academic publication that described # this technique actually just only divided, but that would cause tokens # with negative logits to become more likely, which is obviously wrong) penalty_logits = jnp.where( penalty_arange >= 0, jnp.where( penalty_logits > 0, penalty_logits/repetition_penalty, penalty_logits*repetition_penalty, ), penalty_logits, ) # Finally, put those penalized logit values back into their original # positions in the logits array return logits.at[tokens].set(penalty_logits) def kobold_sample_static(key, logits, top_p=0.9, temp=0.5, top_k=0, tfs=1.0, typical=1.0): ''' This gets called by generate_loop_fn to apply a series of 5 filters to the logits (top-k, then top-p, then TFS, then typical, then temperature) before picking one token using the modified logits ''' # Top-k (keep only the k tokens with the highest logits and remove # the rest, by setting their logits to negative infinity) def top_k_filter(logits): # After sorting the logits array in descending order, # sorted_indices_to_remove is a 1D array that is True for tokens # in the sorted logits array we want to remove and False for ones # we want to keep, in this case the first top_k elements will be # False and the rest will be True sorted_indices_to_remove = jnp.arange(len(logits)) >= top_k # Unsort the logits array back to its original configuration and # remove tokens we need to remove _, indices_to_remove = jax.lax.sort_key_val( jnp.argsort(-logits), sorted_indices_to_remove, ) return jnp.where(indices_to_remove, -jnp.inf, logits) logits = jax.lax.cond(top_k > 0, top_k_filter, lambda x: x, logits) # Top-p (after sorting the remaining tokens again in descending order of # logit, remove the ones that have cumulative softmax probability # greater than p) def top_p_filter(logits): # Sort the logits array in descending order, replace every element # with e (Euler's number) to the power of that element, and divide # each element of the new array by the sum of the elements in the # new array sorted_logits = -jnp.sort(-logits) probabilities = jax.nn.softmax(sorted_logits) # Calculate cumulative_probabilities as the prefix-sum array of # probabilities cumulative_probabilities = jnp.cumsum(probabilities, axis=-1) # We want to remove tokens with cumulative probability higher # than top_p sorted_indices_to_remove = cumulative_probabilities > top_p # Don't ever remove the token with the highest logit, even if # the probability is higher than top_p sorted_indices_to_remove = sorted_indices_to_remove.at[0].set(False) # Unsort and remove _, indices_to_remove = jax.lax.sort_key_val( jnp.argsort(-logits), sorted_indices_to_remove, ) return jnp.where(indices_to_remove, -jnp.inf, logits) logits = jax.lax.cond(top_p < 1.0, top_p_filter, lambda x: x, logits) # Tail free sampling (basically top-p a second time on remaining tokens # except it's the "cumulative normalized absolute second finite # differences of the softmax probabilities" instead of just the # cumulative softmax probabilities) def tail_free_filter(logits): # Sort in descending order sorted_logits = -jnp.sort(-logits) # Softmax again probabilities = jax.nn.softmax(sorted_logits) # Calculate the second finite differences of that array (i.e. # calculate the difference array and then calculate the difference # array of the difference array) d2 = jnp.diff(jnp.diff(probabilities)) # Get the absolute values of all those second finite differences d2 = jnp.abs(d2) # Normalize (all elements in the array are divided by the sum of the # array's elements) d2 = d2 / d2.sum(axis=-1, keepdims=True) # Get the prefix-sum array cumulative_d2 = jnp.cumsum(d2, axis=-1) # We will remove the tokens with a cumulative normalized absolute # second finite difference larger than the TFS value sorted_indices_to_remove = cumulative_d2 > tfs # Don't remove the token with the highest logit sorted_indices_to_remove = sorted_indices_to_remove.at[0].set(False) # Since the d2 array has two fewer elements than the logits array, # we'll add two extra Trues to the end sorted_indices_to_remove = jnp.pad( sorted_indices_to_remove, (0, 2), constant_values=True, ) # Unsort and remove _, indices_to_remove = jax.lax.sort_key_val( jnp.argsort(-logits), sorted_indices_to_remove, ) return jnp.where(indices_to_remove, -jnp.inf, logits) logits = jax.lax.cond(tfs < 1.0, tail_free_filter, lambda x: x, logits) # Typical sampling (https://arxiv.org/pdf/2202.00666.pdf) def typical_filter(logits): # Compute softmax probabilities and the natural logarithms of them probs = jax.nn.softmax(logits) log_probs = jnp.log(probs) # Compute the negative of entropy, which is the sum of p*ln(p) for all p # in the set of softmax probabilities of the logits neg_entropy = jnp.nansum(probs * log_probs, axis=-1, keepdims=True) # Determine absolute difference between the negative entropy and the # log probabilities entropy_deviation = jnp.abs(neg_entropy - log_probs) # Keep certain tokens such that the sum of the entropy_deviation of the # kept tokens is the smallest possible value such that the sum of the # softmax probabilities of the kept tokens is at least the threshold # value (by sorting the tokens in ascending order of entropy_deviation # and then keeping the smallest possible number of tokens from the # beginning such that sum of softmax probabilities is at or above the # threshold) _, sorted_logits = jax.lax.sort_key_val(entropy_deviation, probs) sorted_indices_to_remove = jnp.cumsum(sorted_logits, axis=-1) >= typical sorted_indices_to_remove = jnp.roll(sorted_indices_to_remove, 1, axis=-1) sorted_indices_to_remove = sorted_indices_to_remove.at[0].set(False) # Unsort and remove _, indices_to_remove = jax.lax.sort_key_val( jnp.argsort(entropy_deviation), sorted_indices_to_remove, ) return jnp.where(indices_to_remove, -jnp.inf, logits) logits = jax.lax.cond(typical < 1.0, typical_filter, lambda x: x, logits) # Temperature (just divide the logits by the temperature) def temp_filter(logits): return logits / temp logits = jax.lax.cond(True, temp_filter, lambda x: x, logits) # Finally, pick one token using the softmax thingy again (it gives # an array whose elements sum to 1 so it can be used nicely as a # probability distribution) return jax.random.categorical(key, logits, -1).astype(jnp.uint32) pad_token_id = 50256 def sample_func(data, key, numseqs_aux, badwords, repetition_penalty, generated_index, gen_length, rpslope, rprange, sampler_options): numseqs = numseqs_aux.shape[0] gi = data[0][1] def sample_loop_fn(carry): generated, generated_index, logits, _ = carry[0][0] sample_key = carry[1] # Get the pseudo-random number generator key that will # be used by kobold_sample_dynamic to randomly pick a token sample_key, new_key = jax.random.split(sample_key, num=2) # Apply repetition penalty to all tokens that are # currently inside the "generated" array logits = apply_repetition_penalty_dynamic( logits, generated, repetition_penalty, generated_index, gen_length, rpslope, rprange, ) # Remove any tokens in the badwords list by setting # their logits to negative infinity which effectively # makes their probabilities of being chosen zero logits[badwords] = -np.inf # Use the sampler (kobold_sample_dynamic) to pick one token # based on the logits array as a 0D uint32 array # (higher logit means higher probability of being # picked, non-linearly) next_token = kobold_sample_dynamic( sample_key, logits, **sampler_options, ) # Remember what token was picked generated[generated_index] = next_token generated_index += 1 # Re-pack the current sample_loop_fn's state so we can # get back the same variables the next time carry[0][0] = [generated, generated_index, logits, next_token] carry[0].append(carry[0].pop(0)) return carry[0], new_key # return jax.lax.while_loop( # lambda carry: carry[0][0][1] == gi, # sample_loop_fn, # (data, key), # ) carry = (data, key) while carry[0][0][1] == gi: carry = sample_loop_fn(carry) return carry class PenalizingCausalTransformer(CausalTransformer): def __init__(self, config, **kwargs): # Initialize super().__init__(config, **kwargs) def generate_static(state, key, ctx, ctx_length, gen_length, numseqs_aux, sampler_options, soft_embeddings=None): compiling_callback() numseqs = numseqs_aux.shape[0] # These are the tokens that we don't want the AI to ever write self.badwords = jnp.array(vars.badwordsids).squeeze() @hk.transform def generate_sample(context, ctx_length): # Give the initial context to the transformer transformer = CausalTransformerShard(config) def generate_initial_scan_fn(sequence_index, _): _, initial_state = transformer.generate_initial(context, ctx_length, soft_embeddings=soft_embeddings) # The "generated" array will contain the tokens from the # context as well as the tokens picked by the sampler at # each stage, padded with a bunch of 50256s, so we know # which tokens have to be repetition penalized generated = jnp.pad(context, (0, config["seq"]), constant_values=pad_token_id) # Let it start off with just the 2048 context tokens, plus some 50256s which will be eventually filled with sampler-chosen tokens generated_index = config["seq"] # Add that information to generate_loop_fn's starting state initial_state = (generated, generated_index, sequence_index) + initial_state return sequence_index+1, initial_state _, initial_states = jax.lax.scan(generate_initial_scan_fn, 0, None, numseqs) sample_key = initial_states[-1][0] initial_states = list(jax.tree_map(lambda x: x[i], initial_states[:-1]) for i in range(numseqs)) # Get repetition penalty from the arguments repetition_penalty = sampler_options.pop('repetition_penalty', None) rpslope = sampler_options.pop('rpslope', None) rprange = sampler_options.pop('rprange', None) # This is the main generation loop def generate_loop_fn(carry): # Unpack current generate_loop_fn state generated, generated_index, sequence_index, next_token, decode_state = carry[0][0] sample_key = carry[1] # Get the pseudo-random number generator key that will # be used by kobold_sample_static to randomly pick a token sample_key, new_key = jax.random.split(sample_key) # Give the context to the model and get the logits it # spits out # (a 2D array with 1 row and 50400 columns representing # how strongly it thinks each of the 50257 tokens in its # vocabulary should be appended to the context, followed # by 143 apparently useless columns ???) logits, new_state = transformer.generate_once(next_token, decode_state, soft_embeddings=soft_embeddings) # Verify that logits does indeed have that many rows and # columns (if you get an error here, pray for mercy) assert logits.shape == (1, config["n_vocab"]) # Flatten it into a 1D array to make it easier to use logits = logits[0] # Apply repetition penalty to all tokens that are # currently inside the "generated" array if repetition_penalty is not None: logits = apply_repetition_penalty_static( logits, generated, repetition_penalty, generated_index, gen_length, rpslope, rprange, ) # Remove any tokens in the badwords list by setting # their logits to negative infinity which effectively # makes their probabilities of being chosen zero logits = logits.at[self.badwords].set(-jnp.inf) # Use the sampler (kobold_sample_static) to pick one token # based on the logits array as a 0D uint32 array # (higher logit means higher probability of being # picked, non-linearly) next_token = kobold_sample_static( sample_key, logits, **sampler_options, ) # Remember what token was picked generated = generated.at[generated_index].set(next_token) generated_index += 1 # Re-pack the current generate_loop_fn's state so we can # get back the same variables the next time carry[0][0] = (generated, generated_index, sequence_index, next_token[jnp.newaxis], new_state) carry[0].append(carry[0].pop(0)) return carry[0], new_key return jax.lax.while_loop( lambda carry: carry[0][0][1] - config["seq"] < gen_length, generate_loop_fn, (initial_states, sample_key), ) return generate_sample.apply(state["params"], key, ctx, ctx_length) self.generate_static_xmap = jax.experimental.maps.xmap( fun=generate_static, in_axes=( ["shard", ...], ["batch", ...], ["batch", ...], ["batch", ...], ["batch", ...], ["batch", ...], ["batch", ...], ["shard", ...], ), out_axes=["shard", "batch", ...], axis_resources={'shard': 'mp', 'batch': 'dp'}, ) def generate_initial(state, key, ctx, ctx_length, numseqs_aux, soft_embeddings=None): compiling_callback() numseqs = numseqs_aux.shape[0] @hk.transform def generate_initial_inner(context, ctx_length): # Give the initial context to the transformer transformer = CausalTransformerShard(config) def generate_initial_scan_fn(sequence_index, c): _, initial_state = transformer.generate_initial(c, ctx_length, soft_embeddings=soft_embeddings) generated_index = config["seq"] # Add that information to generate_loop_fn's starting state initial_state = (jnp.empty(config["n_vocab"], dtype=jnp.float32), generated_index, sequence_index) + initial_state return sequence_index+1, initial_state _, initial_states = jax.lax.scan(generate_initial_scan_fn, 0, context, numseqs) sample_key = initial_states[-1][0] initial_states = list(list(jax.tree_map(lambda x: x[i], initial_states[:-1])) for i in range(numseqs)) return initial_states, sample_key return generate_initial_inner.apply(state["params"], key, ctx, ctx_length) self.generate_initial_xmap = jax.experimental.maps.xmap( fun=generate_initial, in_axes=( ["shard", ...], ["batch", ...], ["batch", ...], ["batch", ...], ["batch", ...], ["shard", ...], ), out_axes=["shard", "batch", ...], axis_resources={'shard': 'mp', 'batch': 'dp'}, ) def generate_once(data, state, numseqs_aux, soft_embeddings=None): numseqs = numseqs_aux.shape[0] @hk.without_apply_rng @hk.transform def generate_once_inner(): gi = data[0][1] # Give the initial context to the transformer transformer = CausalTransformerShard(config) # This is the main generation loop def generate_loop_fn(carry): # Unpack current generate_loop_fn state _, generated_index, sequence_index, next_token, decode_state = carry[0][0] # Give the context to the model and get the logits it # spits out # (a 2D array with 1 row and 50400 columns representing # how strongly it thinks each of the 50257 tokens in its # vocabulary should be appended to the context, followed # by 143 apparently useless columns ???) logits, new_state = transformer.generate_once(next_token, decode_state, soft_embeddings=soft_embeddings) # Verify that logits does indeed have that many rows and # columns (if you get an error here, pray for mercy) assert logits.shape == (1, config["n_vocab"]) assert logits.dtype == jnp.float32 # Flatten it into a 1D array to make it easier to use logits = logits[0] # Re-pack the current generate_loop_fn's state so we can # get back the same variables the next time generated_index += 1 carry[0][0] = [logits, generated_index, sequence_index, next_token, new_state] carry[0].append(carry[0].pop(0)) return carry[0], return jax.lax.while_loop( lambda carry: carry[0][0][1] == gi, generate_loop_fn, (data,), ) return generate_once_inner.apply(state["params"]) self.generate_once_xmap = jax.experimental.maps.xmap( fun=generate_once, in_axes=( ["shard", "batch", ...], ["shard", ...], ["batch", ...], ["shard", ...], ), out_axes=["shard", "batch", ...], axis_resources={'shard': 'mp', 'batch': 'dp'}, ) def generate_dynamic(self, ctx, ctx_length, gen_length, numseqs, return_logits=False, soft_embeddings=None, excluded_world_info=None, use_callback=True): assert excluded_world_info is not None assert not return_logits assert gen_length.ndim == 1 assert soft_embeddings is not None key = hk.PRNGSequence(random.randint(0, 2 ** 60)) batch_size = ctx.shape[0] self.batch_size = batch_size _numseqs_aux = jnp.empty((batch_size, numseqs), dtype=np.uint32) numseqs_aux = batch_xmap(_numseqs_aux) sample_data = [ [ np.pad(ctx[0][i], (0, params["seq"]), constant_values=pad_token_id), params["seq"], None, np.empty((), dtype=np.uint32), ] for i in range(numseqs) ] n_generated = 0 regeneration_required = False halt = False started_compiling_callback() generate_data, sample_key = self.generate_initial_xmap(self.state, jnp.array(key.take(batch_size)), ctx, ctx_length, numseqs_aux, soft_embeddings) sample_key = np.asarray(sample_key[0, 0]) while True: generate_data, = self.generate_once_xmap(generate_data, self.state, numseqs_aux, soft_embeddings) for i in range(numseqs): sample_data[i][2] = np.array(generate_data[i][0][0, 0], copy=True) if use_callback: logits = np.float32(tuple(d[2] for d in sample_data)) logits = warper_callback(logits) for i in range(numseqs): sample_data[i][2] = logits[i] sampler_options = settings_callback() repetition_penalty = sampler_options.pop("repetition_penalty", 1.0) rpslope = sampler_options.pop("rpslope", 0.0) rprange = sampler_options.pop("rprange", 0) sample_data, sample_key = sample_func(sample_data, sample_key, _numseqs_aux, badwords, repetition_penalty, params["seq"] + n_generated, gen_length, rpslope, rprange, sampler_options) n_generated += 1 for i in range(numseqs): generate_data[i][3] = np.tile(sample_data[i][0][sample_data[i][1]-1][np.newaxis, np.newaxis], (params["cores_per_replica"], 1, 1)) if use_callback: generated = np.uint32(tuple(d[0] for d in sample_data)) excluded_world_info, regeneration_required, halt = stopping_callback(generated, n_generated, excluded_world_info) if regeneration_required or halt: break else: break stopped_compiling_callback() return sample_data, n_generated, regeneration_required, halt def generate_static(self, ctx, ctx_length, gen_length, numseqs, sampler_options, return_logits=False, soft_embeddings=None): assert not return_logits key = hk.PRNGSequence(random.randint(0, 2 ** 60)) batch_size = ctx.shape[0] self.batch_size = batch_size started_compiling_callback() result = self.generate_static_xmap( self.state, jnp.array(key.take(batch_size)), ctx, np.array(ctx_length, dtype=np.uint32), np.array(gen_length, dtype=np.uint32), np.empty((batch_size, numseqs), dtype=np.uint8), sampler_options, soft_embeddings, ) stopped_compiling_callback() return result def infer_dynamic( context: np.array, numseqs=1, gen_len=80, soft_embeddings: Optional[np.array] = None, soft_tokens: Optional[np.array] = None, excluded_world_info = None, use_callback=True, ) -> Tuple[List[np.array], int, bool, bool]: assert excluded_world_info is not None maps.thread_resources.env = thread_resources_env total_batch = 1 tokens = context if(soft_tokens is not None): tokens = np.uint32(np.concatenate((np.tile(soft_tokens, (tokens.shape[0], 1)), tokens), axis=-1)) provided_ctx = tokens.shape[-1] pad_amount = seq - provided_ctx padded_tokens = np.pad(tokens, ((0, 0), (pad_amount, 0)), constant_values=pad_token_id) batched_tokens = np.array([padded_tokens] * total_batch) samples = [] output = network.generate_dynamic( batched_tokens, np.ones(total_batch, dtype=np.uint32) * provided_ctx, np.ones(total_batch, dtype=np.uint32) * gen_len, numseqs, soft_embeddings=soft_embeddings, excluded_world_info=excluded_world_info, use_callback=use_callback, ) for out in output[0]: samples.append(out[0][params["seq"] : params["seq"] + gen_len]) return (samples,) + output[1:] def infer_static( context: np.array, top_p=0.9, temp=0.5, top_k=0, tfs=1.0, typical=1.0, repetition_penalty=1.0, rpslope=0.0, rprange=0, numseqs=1, gen_len=80, soft_embeddings: Optional[np.array] = None, soft_tokens: Optional[np.array] = None, ) -> List[np.array]: maps.thread_resources.env = thread_resources_env total_batch = 1 tokens = context if(soft_tokens is not None): tokens = np.uint32(np.concatenate((soft_tokens, tokens))) provided_ctx = tokens.shape[0] pad_amount = seq - provided_ctx padded_tokens = np.pad(tokens, ((pad_amount, 0),), constant_values=pad_token_id) batched_tokens = np.array([padded_tokens] * total_batch) samples = [] batched_generator_params = { "temp": temp * np.ones(total_batch), "top_p": top_p * np.ones(total_batch), "tfs": tfs * np.ones(total_batch), "typical": typical * np.ones(total_batch), "repetition_penalty": repetition_penalty * np.ones(total_batch), "rpslope": rpslope * np.ones(total_batch), "rprange": np.full(total_batch, rprange, dtype=np.uint32), "top_k": np.full(total_batch, top_k, dtype=np.uint32) } output = network.generate_static( batched_tokens, np.ones(total_batch, dtype=np.uint32) * provided_ctx, np.ones(total_batch, dtype=np.uint32) * gen_len, numseqs, batched_generator_params, soft_embeddings=soft_embeddings, )[0] for o in output: samples.append(o[0][0, 0, params["seq"] : params["seq"] + gen_len]) return samples def reshard_reverse(x, total_shards, old_shape): assert len(x.shape) != 1 if len(x.shape) == 2: if old_shape[1] == x.shape[1]: out = x[0:1].tile((total_shards, 1)) else: out = x.reshape(old_shape) elif len(x.shape) == 3: if x.shape[0] * x.shape[2] == old_shape[2]: out = x.reshape(old_shape) elif x.shape[0] * x.shape[1] == old_shape[1]: out = x.reshape((old_shape[1], old_shape[0], old_shape[2])).permute((1, 0, 2)) else: assert False else: assert False return out def get_old_shape(t, total_shards, dim=2): if len(t.shape) == 2: shard_shape = t.shape if dim == 1: assert shard_shape[0] % total_shards == 0 return (shard_shape[0] // total_shards, shard_shape[1]) elif dim == 2: assert shard_shape[1] % total_shards == 0 return (shard_shape[0], shard_shape[1] // total_shards) else: raise ValueError(f"Unsupported dim {dim}") if len(t.shape) == 1: assert t.shape[0] % total_shards == 0 return (t.shape[0] // total_shards,) else: raise ValueError(f"Unsupported shape {t.shape}") def read_neox_checkpoint(state, path, config, checkpoint_shards=2): assert config["cores_per_replica"] % checkpoint_shards == 0 output_shards = config["cores_per_replica"] // checkpoint_shards import torch import torch.utils.dlpack from tqdm.auto import tqdm move_xmap = jax.experimental.maps.xmap( fun=lambda x, _: to_bf16(x), in_axes=(["shard", ...], ["batch", ...]), out_axes=["shard", ...], axis_resources={'shard': 'mp', 'batch': 'dp'} ) path_template = os.path.join(path, "layer_{layer:02d}-model_{shard:02d}-model_states.pt") static_mapping = { "word_embeddings.weight": {"module": "embedding_shard/~/linear", "param": "w", "axis": 1}, "final_linear.weight": {"module": "projection_shard/~/linear", "param": "w", "axis": 2}, "norm.weight": {"module": "projection_shard/~/replicated_layer_norm", "param": "scale", "axis": None}, "norm.bias": {"module": "projection_shard/~/replicated_layer_norm", "param": "offset", "axis": None}, } layer_mapping = { "attention.query_key_value.weight": {"module": "combined_qkv", "param": "w", "axis": 2}, "attention.query_key_value.bias": {"module": "combined_qkv", "param": "b", "axis": 1}, "attention.dense.weight": {"module": "linear_3", "param": "w", "axis": 1}, "attention.dense.bias": {"module": "linear_3", "param": "b", "axis": None}, "mlp.dense_h_to_4h.weight": {"module": "linear_4", "param": "w", "axis": 2}, "mlp.dense_h_to_4h.bias": {"module": "linear_4", "param": "b", "axis": 1}, "mlp.dense_4h_to_h.weight": {"module": "linear_5", "param": "w", "axis": 1}, "mlp.dense_4h_to_h.bias": {"module": "linear_5", "param": "b", "axis": None}, "input_layernorm.weight": {"module": "replicated_layer_norm", "param": "scale", "axis": None}, "input_layernorm.bias": {"module": "replicated_layer_norm", "param": "offset", "axis": None}, "post_attention_layernorm.weight": {"module": "replicated_layer_norm_1", "param": "scale", "axis": None}, "post_attention_layernorm.bias": {"module": "replicated_layer_norm_1", "param": "offset", "axis": None}, } tqdm_length = len(static_mapping) + config["layers"]*len(layer_mapping) bar = tqdm(total=tqdm_length, desc="Loading from NeoX checkpoint") for checkpoint_layer in range(config["layers"] + 5): if checkpoint_layer in (1, config["layers"] + 2): continue layer = checkpoint_layer - 2 shards = [] for checkpoint_shard in range(checkpoint_shards): shards.append(torch.load(path_template.format(layer=checkpoint_layer, shard=checkpoint_shard), map_location="cpu")) for key in shards[0]: if key == "attention.rotary_emb.inv_freq": continue elif key in static_mapping: target_module = "causal_transformer_shard/~/" + static_mapping[key]["module"] target_param = static_mapping[key]["param"] target_axis = static_mapping[key]["axis"] elif key in layer_mapping: target_module = f"causal_transformer_shard/~/layer_{layer}/~/" + layer_mapping[key]["module"] target_param = layer_mapping[key]["param"] target_axis = layer_mapping[key]["axis"] else: error = f"{repr(key)} not found in mapping" print("\n\nERROR: ", error, file=sys.stderr) raise RuntimeError(error) original_shape = shards[0][key].shape for checkpoint_shard in range(checkpoint_shards): if key in ("attention.dense.bias", "mlp.dense_4h_to_h.bias"): shards[checkpoint_shard][key] /= output_shards if key != "word_embeddings.weight" and shards[checkpoint_shard][key].ndim == 2: shards[checkpoint_shard][key] = shards[checkpoint_shard][key].T tensor = shards[checkpoint_shard][key] if target_axis is not None: target_shape = (output_shards,) + get_old_shape(tensor, total_shards=output_shards, dim=target_axis) else: target_shape = (output_shards, tensor.shape[0]) shards[checkpoint_shard][key] = reshard_reverse(tensor.unsqueeze_(0), output_shards, target_shape) #print(key, ":", original_shape, "->", shards[0][key].shape) tensor = torch.cat([shards[s][key] for s in range(checkpoint_shards)], dim=0) target_shape = state["params"][target_module][target_param].shape if tensor.shape != target_shape: error = f"Weight {repr(key)} has shape {tensor.shape} in checkpoint but shape {target_shape} was requested by MTJ for {target_module} {target_param}" print("\n\nERROR: ", error, file=sys.stderr) raise RuntimeError(error) if tensor.dtype is torch.float16 or tensor.dtype is torch.float32: tensor = tensor.bfloat16() state["params"][target_module][target_param] = move_xmap( jax.dlpack.from_dlpack(torch.utils.dlpack.to_dlpack(tensor)).copy(), np.zeros(config["cores_per_replica"]), ) bar.update(1) for mk, mv in state["params"].items(): for pk, pv in mv.items(): if isinstance(pv, PlaceholderTensor): error = f"{mk} {pk} could not be found in the model checkpoint" print("\n\nERROR: " + error, file=sys.stderr) raise RuntimeError(error) def load_model(path: str, driver_version="tpu_driver0.1_dev20210607", hf_checkpoint=False, **kwargs) -> None: global thread_resources_env, seq, tokenizer, network, params default_params = { "compat": "j", "layers": 28, "d_model": 4096, "n_heads": 16, "n_vocab": 50400, "n_vocab_padding": 0, "norm": "layernorm", "pe": "rotary", "pe_rotary_dims": 64, "seq": 2048, "cores_per_replica": 8, "tokenizer_class": "GPT2TokenizerFast", "tokenizer": "gpt2", } params = kwargs if vars.model == "TPUMeshTransformerGPTNeoX": default_params = { "compat": "neox", "layers": 44, "d_model": 6144, "n_heads": 64, "n_vocab": 50432, "n_vocab_padding": 0, "norm": "doublelayernorm", "pe": "neox_rotary", "pe_rotary_dims": 24, "seq": 2048, "cores_per_replica": 8, "tokenizer_class": "GPT2TokenizerFast", "tokenizer": "gpt2", } # Try to convert HF config.json to MTJ config if hf_checkpoint: spec_path = os.path.join("maps", vars.model_type + ".json") if not os.path.isfile(spec_path): raise NotImplementedError(f"Unsupported model type {repr(vars.model_type)}") with open(spec_path) as f: lazy_load_spec = json.load(f) if "mtj_compat" in lazy_load_spec: params["compat"] = lazy_load_spec["mtj_compat"] if "mtj_pe" in lazy_load_spec: params["pe"] = lazy_load_spec["mtj_pe"] for k, v in lazy_load_spec.get("mtj_config_map", {}).items(): if type(v) is not list: params[k] = params[v] continue for i in range(len(v)): if i == len(v) - 1: params[k] = v[i] elif v[i] in params: params[k] = params[v[i]] break params["n_vocab"] = params["vocab_size"] if "activation_function" in params: params["activation"] = params["activation_function"] # Both the number of attention heads in the model and the embedding # dimension of the model need to be divisible by the number of TPU cores # that we use, and JAX also requires the number of TPU cores used to be # an even number if we're using more than one core, so logically we try # to pick the largest possible even number of TPU cores such that the # number of attention heads and embedding dimension are both divisible # by the number of TPU cores, and fall back to one core if an even # number of TPU cores is not possible. for c in (8, 6, 4, 2, 1): if 0 == params["n_heads"] % c == params["d_model"] % c: params["cores_per_replica"] = c break # The vocabulary size of the model also has to be divisible by the # number of TPU cores, so we pad the vocabulary with the minimum # possible number of dummy tokens such that it's divisible. params["n_vocab_padding"] = -(params["n_vocab"] % -params["cores_per_replica"]) if "compat" in params: default_params["compat"] = params["compat"] if default_params["compat"] == "fairseq_lm": default_params["tokenizer"] = "KoboldAI/fairseq-dense-125M" for param in default_params: if param not in params: params[param] = default_params[param] # Load tokenizer if vars.model == "TPUMeshTransformerGPTNeoX": tokenizer = Tokenizer.from_file(os.path.join(path, "20B_tokenizer.json")) def new_encode(old_encode): def encode(s, *args, **kwargs): return old_encode(s).ids return encode tokenizer.encode = new_encode(tokenizer.encode) elif not hf_checkpoint: if not isinstance(params["tokenizer_class"], str) or not any(params["tokenizer_class"].endswith(s) for s in ("Tokenizer", "TokenizerFast")): raise ValueError("`tokenizer_class` must be a string ending in 'Tokenizer' or 'TokenizerFast'") tokenizer_class = getattr(__import__("transformers"), params["tokenizer_class"]) tokenizer = tokenizer_class.from_pretrained(params["tokenizer"]) # Disable JAX warnings about these two functions having been renamed jax.host_count = jax.process_count jax.host_id = jax.process_index print("Connecting to your Colab instance's TPU", flush=True) spinner = multiprocessing.Process(target=show_spinner, args=()) spinner.start() colab_tpu_addr = os.environ['COLAB_TPU_ADDR'].split(':')[0] url = f'http://{colab_tpu_addr}:8475/requestversion/{driver_version}' requests.post(url) spinner.terminate() print() config.FLAGS.jax_xla_backend = "tpu_driver" config.FLAGS.jax_backend_target = "grpc://" + os.environ['COLAB_TPU_ADDR'] cores_per_replica = params["cores_per_replica"] seq = params["seq"] params["optimizer"] = optax.scale(0) mesh_shape = (1, cores_per_replica) devices = np.array(jax.devices()[:cores_per_replica]).reshape(mesh_shape) thread_resources_env = maps.ResourceEnv(maps.Mesh(devices, ('dp', 'mp')), ()) maps.thread_resources.env = thread_resources_env global shard_xmap, batch_xmap shard_xmap = __shard_xmap() batch_xmap = __batch_xmap(shard_dim=cores_per_replica) global badwords # These are the tokens that we don't want the AI to ever write badwords = jnp.array(vars.badwordsids).squeeze() if not path.endswith("/"): path += "/" network = PenalizingCausalTransformer(params, dematerialized=True) if not hf_checkpoint and vars.model != "TPUMeshTransformerGPTNeoX": network.state = read_ckpt_lowmem(network.state, path, devices.shape[1]) #network.state = network.move_xmap(network.state, np.zeros(cores_per_replica)) return if vars.model == "TPUMeshTransformerGPTNeoX": print("\n\n\nThis model has ", f"{hk.data_structures.tree_size(network.state['params']):,d}".replace(",", " "), " parameters.\n") read_neox_checkpoint(network.state, path, params) return # Convert from HF checkpoint move_xmap = jax.experimental.maps.xmap( fun=lambda x, _: to_bf16(x), in_axes=(["shard", ...], ["batch", ...]), out_axes=["shard", ...], axis_resources={'shard': 'mp', 'batch': 'dp'} ) model_spec = {} for key, spec in lazy_load_spec.get("static_weights", {}).items(): if spec.get("mtj") is not None: model_spec[key] = spec["mtj"].copy() model_spec[key]["module"] = "causal_transformer_shard/~/" + model_spec[key]["module"] for _key, spec in lazy_load_spec.get("layer_weights", {}).items(): for layer in range(params["layers"]): if spec.get("mtj") is not None: key = _key.format(layer=layer) model_spec[key] = spec["mtj"].copy() model_spec[key]["module"] = "causal_transformer_shard/~/" + model_spec[key]["module"].format(layer=layer) import torch_lazy_loader import torch from tqdm.auto import tqdm import functools def callback(model_dict, f, **_): with zipfile.ZipFile(f, "r") as z: try: last_storage_key = None f = None current_offset = 0 print("\n\n\nThis model has ", f"{hk.data_structures.tree_size(network.state['params']):,d}".replace(",", " "), " parameters.\n") for key in tqdm(sorted(model_dict.keys(), key=lambda k: (model_dict[k].key, model_dict[k].seek_offset)), desc="Loading model tensors"): # Some model weights are used by transformers but not by MTJ. # We have to materialize these weights anyways because # transformers will throw a tantrum otherwise. To attain # the least possible memory usage, we create them as meta # tensors, which don't take up any actual CPU or TPU memory. if key not in model_spec: model_dict[key] = torch.empty(model_dict[key].shape, dtype=model_dict[key].dtype, device="meta") continue storage_key = model_dict[key].key if storage_key != last_storage_key or model_dict[key].seek_offset < current_offset: last_storage_key = storage_key if isinstance(f, zipfile.ZipExtFile): f.close() f = z.open(f"archive/data/{storage_key}") current_offset = 0 if current_offset != model_dict[key].seek_offset: f.read(model_dict[key].seek_offset - current_offset) current_offset = model_dict[key].seek_offset spec = model_spec[key] transforms = set(spec.get("transforms", ())) if not isinstance(model_dict[key], torch_lazy_loader.LazyTensor): error = f"Duplicate key {repr(key)}" print("\n\nERROR: " + error, file=sys.stderr) raise RuntimeError(error) size = functools.reduce(lambda x, y: x * y, model_dict[key].shape, 1) dtype = model_dict[key].dtype nbytes = size if dtype is torch.bool else size * ((torch.finfo if dtype.is_floating_point else torch.iinfo)(dtype).bits >> 3) tensor = model_dict[key].materialize(f, map_location="cpu") model_dict[key] = tensor.to("meta") current_offset += nbytes # MTJ requires certain mathematical operations to be performed # on tensors in order for them to be in the correct format if "divide_by_shards" in transforms: tensor /= params["cores_per_replica"] if "vocab_pad" in transforms: tensor = torch.nn.functional.pad(tensor, (0, 0, 0, params["n_vocab_padding"])) if "no_transpose" not in transforms and tensor.ndim == 2: tensor = tensor.T tensor.unsqueeze_(0) if tensor.dtype is torch.float16 or tensor.dtype is torch.float32: tensor = tensor.bfloat16() # Shard the tensor so that parts of the tensor can be used # on different TPU cores network.state["params"][spec["module"]][spec["param"]] = move_xmap( jax.dlpack.from_dlpack(torch.utils.dlpack.to_dlpack( reshard_reverse( tensor, params["cores_per_replica"], network.state["params"][spec["module"]][spec["param"]].shape, ) )).copy(), np.empty(params["cores_per_replica"]), ) # Check for tensors that MTJ needs that were not provided in the # HF model for mk, mv in network.state["params"].items(): for pk, pv in mv.items(): if isinstance(pv, PlaceholderTensor): # The transformers GPT-J models apparently do not # have embedding bias, whereas MTJ GPT-J models do, # so we have to supplement an embedding bias tensor # by creating a tensor with the necessary shape, filled # with zeros. if mk == "causal_transformer_shard/~/embedding_shard/~/linear" and pk == "b": mv[pk] = move_xmap(jnp.zeros(mv[pk].shape, dtype=jnp.bfloat16), np.empty(params["cores_per_replica"])) else: error = f"{mk} {pk} could not be found in the model checkpoint" print("\n\nERROR: " + error, file=sys.stderr) raise RuntimeError(error) finally: if isinstance(f, zipfile.ZipExtFile): f.close() if os.path.isdir(vars.model.replace('/', '_')): import shutil shutil.move(vars.model.replace('/', '_'), "models/{}".format(vars.model.replace('/', '_'))) print("\n", flush=True) with torch_lazy_loader.use_lazy_torch_load(callback=callback, dematerialized_modules=True): if(os.path.isdir(vars.custmodpth)): try: tokenizer = AutoTokenizer.from_pretrained(vars.custmodpth, cache_dir="cache") except Exception as e: try: tokenizer = GPT2TokenizerFast.from_pretrained(vars.custmodpth, cache_dir="cache") except Exception as e: tokenizer = GPT2TokenizerFast.from_pretrained("gpt2", cache_dir="cache") try: model = AutoModelForCausalLM.from_pretrained(vars.custmodpth, cache_dir="cache") except Exception as e: model = GPTNeoForCausalLM.from_pretrained(vars.custmodpth, cache_dir="cache") elif(os.path.isdir("models/{}".format(vars.model.replace('/', '_')))): try: tokenizer = AutoTokenizer.from_pretrained("models/{}".format(vars.model.replace('/', '_')), cache_dir="cache") except Exception as e: try: tokenizer = GPT2TokenizerFast.from_pretrained("models/{}".format(vars.model.replace('/', '_')), cache_dir="cache") except Exception as e: tokenizer = GPT2TokenizerFast.from_pretrained("gpt2", cache_dir="cache") try: model = AutoModelForCausalLM.from_pretrained("models/{}".format(vars.model.replace('/', '_')), cache_dir="cache") except Exception as e: model = GPTNeoForCausalLM.from_pretrained("models/{}".format(vars.model.replace('/', '_')), cache_dir="cache") else: try: tokenizer = AutoTokenizer.from_pretrained(vars.model, cache_dir="cache") except Exception as e: try: tokenizer = GPT2TokenizerFast.from_pretrained(vars.model, cache_dir="cache") except Exception as e: tokenizer = GPT2TokenizerFast.from_pretrained("gpt2", cache_dir="cache") try: model = AutoModelForCausalLM.from_pretrained(vars.model, cache_dir="cache") except Exception as e: model = GPTNeoForCausalLM.from_pretrained(vars.model, cache_dir="cache") #network.state = network.move_xmap(network.state, np.zeros(cores_per_replica))