)jdZddlZddlZddlZddlZddlmZddlm Z ddl Z ddl m Z ddlmZmZdededefdZd d Zd Zed kr edSdS)z* Evaluate perplexity (PPL) of MLX models. N) load_dataset)get_total_parametersload data_path num_samplessequence_lengthctj|ddddd}t||d}tjt |}|dkr||zntd}g}d} t ||krQ| ||| \} } | d z } | | t ||kQtj |dt ||z|z}| d |}|dkr |d|}|S) Ntrainz train[:1])path train_split valid_splitTF) hf_datasetr testrinf)typesSimpleNamespacernprandom permutationlentolistfloatprocessextendmxarrayreshape) tokenizerrrrargsdatasetperm num_tokensdataitokens_s [/lsinfo/ai/hellotax_ai/base_platform/venv/lib/python3.11/site-packages/mlx_lm/perplexity.py load_datar*sR  "&      D4++A.G 9 W . . 5 5 7 7D2=//;..uU||J D A d))j OOGDG$455  Q F d))j 8DKCII8OKKL M MD <<O , ,DQL[L! Kcg}t||zdz |z}ttdt||D]\}}||||z}||ddddftj}t j||ddddfd} t j | | | |dzdzdks |dz|krtd|dzd|d d tt j |}|} t!j| } t jt j|d } |j} | t!j| z }| |z}| |fS) a Evaluate perplexity on a dataset with standard error calculation. Args: model: The model to evaluate data: Tokenized data tensor batch_size: Batch size for evaluation Returns: tuple: (perplexity, standard_error) rrNrnone) reductionz Processed /z batches... )end)ddof)r enumeraterangeastyperfloat32nnlosses cross_entropyevalappendflattenprint concatenatemeanitemmathexpsqrtvarsize)modelr% batch_size all_losses num_batchesr&sbatchlogitsr9 mean_losspplstd_devr$standard_errorstandard_error_ppls r)eval_pplrS5sJt99z)A-*Nz!Evaluate perplexity of MLX models) descriptionz--modelTz&Path to model or Hugging Face model ID)typerequiredhelpz--trust-remote-code store_truezJEnable trusting remote code for tokenizer/model loading from Hugging Face.)actionrXz --batch-sizer,zBatch size for evaluation)rVdefaultrXz--sequence-lengthizSequence length for evaluationz --num-samplesz/Number of samples to use (-1 for all available)z --data-pathzallenai/tulu-3-sft-mixturezIA Hugging Face dataset which is compatible with an mlx-lm dataset format.z--seed{zRandom seed for data samplingzLoading model from z...trust_remote_code)tokenizer_configzModel loaded: g.Az.1fz M parametersz Loading dataset...z Sequence length: )rrz Loaded z samplesz' Evaluating perplexity with batch size )rHrrz= ============================================================zEVALUATION RESULTSz<============================================================zModel: z Perplexity: z.3fu ± zEvaluation time: z.2fz secondsz Peak memory: geAz GBzTokens per second: z.0fz Dataset statistics:z Total samples: z Total tokens: )argparseArgumentParser add_argumentstrint parse_argsrrseedrr>rGr^rrrr*rrrrHtimerSshapeget_peak_memoryrF) parserr!r_rGr total_paramsr% start_timerOse eval_timetokens_evaluateds r)mainrpes  $1T U U UF   5    Y  S!2M   -     >    , X   sC.M     DINN49INN49 / / / /000+T5K-UTTQUVDJ9IJJJE9(..L =<+ = = = =>>> !""" 6 4 6 6777  $,    D )c$ii ) ) )*** IT_ I I IJJJJudt???GC j(Iz!} 1 (9: /  (OOO DJ !!! . . . .b . . ./// 5i 5 5 5 5666 =",..4 = = = =>>> B 09 < B B BCCC "### )c$ii ) )*** (TY ( ()))))r+__main__)r,)__doc__r`rBrgrmlx.corecorermlx.nnr8numpyrmlx_lm.tuner.datasetsr mlx_lm.utilsrrrcrdr*rSrp__name__r+r)r{s  ......33333333 D-#-#-#-#`W*W*W*t zDFFFFFr+