sg´NddlZddlZddlZddlZddlmZmZmZmZm Z m Z m Z m Z m Z mZmZmZmZmZddlZddlmZddlmcmcmZddlmcmcmZddlmcmcmZ ddl!m"Z"ddl#m$Z$ddl%m&Z&m'Z'ddl(m)Z)ddl*m+Z+m,Z,m-Z-m.Z.m/Z/m0Z0m1Z1ddl2m3Z3m4Z4m5Z5m6Z6ddl7m8Z8dd l9m:Z:m;Z;mZ>m?Z?m@Z@mAZAdd lBmCZCdd lDmEZEdd lFmGZGdd lHmIZIerddlJmKZKdZL ddlMmNZNmOZOeQdZRdZSeejejfZUeeejeUfZVe?je6je?je6je?je6je?je6je?je6jiZ\e?je?jgZ]e?je?jfZ^e d^de,deVde?deeCdee'de,f dZ_e de,deVde'de,fdZ`e dedeafdZbe de'deafdZce deQdejfdZde d ejdeQdejfd!Zed ejdeQdeejejffd"Zfe d^de,d#e"jd$ee ejDjd%eee ejDjee ejDjfde,f d&Zid%e ed'eaddfd(Zje de,d#e"jd)ee"jd*eeeQejfde,f d+Zle de,d#e"jde,fd,Zme de,dee?d-ee>d.ee;d/ead0ead1eQd2eQde,fd3Zne de,de,fd4Zoe de,d5e:d6eade,fd7Zpe d^de,de'de,fd8Zqe de,de,fd9Zrd#e"jd:e e"jddfd;Zse de,deade,f d?Zte de,d:e e"jdrBr2r:ndimr!_init_intra_and_inter_node_groups_device_handle device_count_is_valid_hybrid_shard_pg_typetype_get_default_comm_hook_state_inter_node_state)r1r2r5 default_groupintra_node_groupinter_node_groups rIr<r<s   -k :!,E $/#8#8!#8#DE "-"7"7"7"CE >{?O?O>PQ   *, -N 5//<<>. **// *- 89F 5E !5GGKMGZF[]  ;**E LrKcjt|txr"t|dk(xrtd|DS)Nc3PK|]}t|tj ywN) isinstancedist ProcessGroup).0pgs rI z1_is_valid_hybrid_shard_pg_type..sJb 2t001J$&)r_tuplelenallrNs rIrTrTs: =%( K  ! # K JMJ JrKcDt|txr|jdk(S)Nr\)r_rrP)r5s rIrOrOs k: . H;3C3Cq3HHrKnum_devices_per_nodec6tj|\}}|S)aU Return a process group across the current node. For example, given each row is a distinct node: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 This API would return an intra-node subgroup across [0, 1, ..., 7] or [8, 9, ..., 15] depending on the process's rank. For example, rank 3 would get [0, 1, ..., 7]. )r` new_subgroups)rjintra_node_subgroup_s rI_init_intra_node_process_groupros!"//0DE rKglobal_process_groupcTd}tj|}tj|}||z}tj||z}t |D]?}t |Dcgc] }|||zz } }tj | |} ||k(s>| }A| J|d|Scc}w)a Return an inter-node process group where each contained rank has the same local rank. For example, given each row is a distinct node: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 This API would return inter-node process group [0, 8], [1, 9], [2, 10], and so forth depending on the process's rank. For example, rank 1 would get [1, 9], rank 5 would get [5, 13]. N)ranksbackendz. expected to assign inter-node pg, but did not)r` get_backendget_world_sizeget_rankrange new_group) rprj inter_node_pgsharding_backendrA num_nodes my_local_rank local_rankiranks_for_inter_groupgrps rI_init_inter_node_process_grouprs M''(<=$$%9:J22IMM"67:NNM01 =B9=M! 89J!22 3! ! nn#8BRS  &M  !H FGH! ! s%B%c0t|t||fS)a Initialize intra and inter-node process groups and return the ones corresponding to this process's rank. This function can be used to initialize process groups for ``HYBRID_SHARD`` or ``_HYBRID_SHARD_ZERO2`` in FSDP. This function assumes each node has an equal number of CUDA-enabled devices. Returns: Tuple[dist.ProcessGroup, dist.ProcessGroup]: Intra and inter-node process group. )ror)rprjs rIrQrQ s# '';<&';=QR rKmoduleignored_modulesignored_statesc| | tdd}|du}|rt|}t|dng}t| t|ngdt|dkDr"t |dt j r|}n|}t|||_t||j||_ t||j|_ |S)NzfCannot pass both ignored_modules and ignored_states at the same time. Please just pass ignored_states.TFr) r:list_check_ignored_statesrgr_nn Parameter_get_ignored_modules_ignored_modules_get_ignored_params_ignored_params_get_ignored_buffer_names_ignored_buffer_names)r1rrrignored_parameterspassed_as_ignored_statesignored_states_lists rI_init_ignored_module_statesrs"~'A :  -T9">2148 %4%@D !b%  !# )!,bll ;!4 1O1&/JE/ E #< #E LrKrct|dk(ry|r`td|D}td|D}|s9|s6t|Dchc] }t|c}t}t d|yytd|Ds6t|Dchc] }t|c}t}t d|ycc}wcc}w) z Check that the ignored states are uniformly parameters or uniformly modules. We may remove this check in the future if we permit mixing. rNc3PK|]}t|tj ywr^)r_rrrbr1s rIrdz(_check_ignored_states..WsUUE2<<8Urec3PK|]}t|tj ywr^r_rModulers rIrdz(_check_ignored_states..XsS5*UBII6Sre)keyzUignored_states expects all nn.Parameter or all nn.Module list elements but got types c3PK|]}t|tj ywr^rrs rIrdz(_check_ignored_states..asLE:eRYY/Lrez>ignored_modules expects nn.Module list elements but got types )rgrhsortedrUreprr:)rr all_params all_modulesr1 sorted_typess rIrrLs >aUnUU SNSS +!N"K54;"KQUVL**69 #.zL^LL!N"K54;"KQUVL%( M #L#Ls B; Cignored_params device_idc6d}|1t|tjr|ntj|}|t||D]|}|jjdvr| |j}+|jj|jk7sOt d|jd|jj|xstj j}|jdk(r t dtj||_ |S)a< Determine device handle used for initializing FSDP. If a device is specified by ``device_id``, then returns device handle corresponds to that device type. Otherwise, If the module is already on a non-CPU device, then the device type is that non-CPU device type. If the module is on CPU or meta, then the device type is the current accelerator device. See the :ref:`Accelerators` for details. This method will be called once ignored paramters was determined, as the device handle maybe needed for other initialization. N>cpumetazLFSDP does not support modules with different device types but got params on z and rzOFSDP needs a non-CPU accelerator device, but no accelerator device is detected.) r_torchdevice_get_orig_paramsrU RuntimeError_C_get_acceleratorr from_devicerR)r1rrrdetermined_deviceparams rI_init_device_handleris()U\\2 i(   %fn= E||  O3 ($)LL!<<$$(9(>(>>&-->-C-C,DE%,,J[J[I\^ .L1J1J1L  ! !U *a -889JKE LrKct||_i}|jD]\}}t|}|j||<!||_|Sr^)_get_buffer_names _buffer_names named_buffersrdtype_buffer_name_to_orig_dtype)r1rr buffer_namebuffers rI_init_buffer_staters_ ,F3E :<%335? V' 4 28,,";/?(BE$ LrKmixed_precision cpu_offloadlimit_all_gathersuse_orig_paramsbackward_prefetch_limitforward_prefetch_limitc|jdk(rO|tjk7r+tjd|xstj dtj}n/|tjk(rtjdt d|xstj |_|xs t|_ |5tjjdt|jtjj!t"dd k(|_|xs t'|_||_||_t.j0|_d|_t7|_t;j<|_tAjB|j>|||_"d|_#i}||_$d} | |_%g} | |_&|S) NrMz/FSDP is switching to use `NO_SHARD` instead of z since the world size is 1.zoThe `NO_SHARD` sharding strategy is deprecated. If having issues, please use `DistributedDataParallel` instead.) stacklevelz'torch.distributed.fsdp.mixed_precision.1)'rAr&NO_SHARDwarningswarn FULL_SHARD FutureWarningr3r%rrr_log_api_usage_oncestrosenvirongetr_use_full_prec_in_evalr"rr_use_orig_paramsrIDLEtraining_state_is_rootr _free_event_queuer`get_debug_level _debug_levelexec_order_utils_ExecOrderData_exec_order_data_unshard_event_fully_sharded_module_to_handle_handleparams) r1r3rrrrrrrrrs rI_init_core_staters 1  0 9 9 9 MMA$C(8(C(CDE''  -55 .77 7  <   0N3C3N3NE+?~/?E" $$5c%:O:O6P5Q R  2B73>  $3z|E/E,E(--EEN-/E--/E-<< E  EIK#,KE)*.GEM"$FEL LrKcfg}||_g}||_g}||_d|_d|_d|_|S)NT)_root_pre_forward_handles_pre_forward_handles_post_forward_handles_sync_gradients _comm_hook_comm_hook_state)r1rrrs rI_init_runtime_statersK8:&?E#24!5E35"7E EE!E LrKbackward_prefetchforward_prefetchc"||_||_|Sr^)rr)r1rrs rI_init_prefetching_staters 0E-E LrKctj|}|r+||jk7rt|j|_|Sd|_|Sr^)r get_root_meshr=r*rR_fsdp_extension)r1r5 root_meshs rI_init_extensionr sO --k:IyE$6$66 1%2F2F G L!% LrKctj|_t}t |_||_i}||_|Sr^)r(FULL_STATE_DICT_state_dict_typer$r#_optim_state_dict_config_state_dict_config_unshard_params_ctx)r1state_dict_configunshard_params_ctxs rI_init_state_dict_staters?*::E)<)>%=%?E"0E57 2E LrKrc|D]O}t|jdk(sd}|jD] \}}||us |}n|sJtd|dy)z Verify if the parameters are accepted by FSDP. The only restriction now is that the parameter cannot be a scalar tensor (param.shape == []). rrz.FSDP doesn't support salar parameters. Change z& to a 1D tensor with numel equal to 1.N)rgshapenamed_parametersr:)rrr param_namenameparam_s rI_verify_managed_paramsr(s~   u{{ q J & 7 7 9  fF?!%J  :$%KM  rKfully_sharded_module param_init_fnsync_module_statescrt|j|t|jj}t |jj \}}|s|r|t||j nA|r#t||j jn|rtj|fdj D chc]}|jD]} | } }} t|j| |t|j|jj_tt!|j} t#|| |r@t%|| j&j(t*vrt%|| j,t/| |Scc} }w)zHInitialize a ``FlatParamHandle`` from a module ``fully_sharded_module``.c>t|duxr|jvSr^)rr) submoduler1s rIz0_init_param_handle_from_module..Zs('=i'HD'P(8!7!77rK)check_fn)_check_single_device_moduler_get_device_from_device_idr?rR_need_to_materialize_moduler_materialize_with_param_init_fn_materialize_meta_moduler.materialize_modulebuffers_move_module_to_device_get_compute_devicecompute_devicerrr_sync_module_params_and_buffersr2r3r;rB_init_param_handle_from_params) r1rrrrdevice_from_device_idis_meta_moduleis_torchdistX_deferred_initignored_modulerignored_buffersmanaged_paramss ` rI_init_param_handle_from_moduler;s 4e6K6KYW65::u333Ne33U5K5K3/N/ 5=;T' -1G1G     " "   %(( 8 $44 $,,.  O    /    E*+?AVAVWXN/@' .%2E2E   " "&@ @ +$ne6J6J #5.:NO L?s F3c t|dk(ryt|||jt|j|j j |jj|jj|jj|j|j|j }|j|jrJ|j j#|j$||_||j&|j(<t+j,d}|j j r,|j$j,|k7r|j/|yyy)Nr)fsdp_extensionr)rgrrSHARDING_STRATEGY_MAPr3roffload_paramsr param_dtype reduce_dtypekeep_low_precision_gradsr2rrshardrrappend flat_paramr_fully_sharded_modulerr flat_param_to)r1rrhandle cpu_devices rIrrs%  6{a  e556 (( )) ** 66  ,, F LLN}}  LL))*EMJPE))&*F*FGe$J ''F,=,=,D,D ,RZ(-S'rK root_modulerc d} | t|n t}|D]V}t|tj j st|dt|zt|sMtd|jD])}tj|r|j|+|Dchc]3}|jD]}t|tjs| 5}}}||vrtj d|jD]9}t|} | t#| dsJ|j%| j&;|S#t$r }t|dt|z|d}~wwxYwcc}}w)ah Check that ``_ignored_modules`` is an iterable of ``nn.Module`` s without any FSDP instances. Return the modules contained in their module subtrees as a :class:`set`. Nested FSDP instances are excluded, but their already-computed ignored modules are included. ``_ignored_modules`` represents the argument passed by the user to FSDP. z>`ignored_modules` should be an iterable of `torch.nn.Module`s Nzbut got zbut got an iterable with z1`ignored_modules` should not include FSDP moduleszTrying to ignore the top-level module passed into the FSDP constructor itself will result in all parameters being ignored and is not well-supported: r)set TypeErrorrUr_rrrrr:modulestraversal_utils _composableadd fsdp_fileFullyShardedDataParallelrrhasattrupdater) r)r msg_prefixignored_root_moduleserchildrroptional_fsdp_states rIrrsRJQ%5%AC !su  'R&%((//2J+DT&\N)SST T !& )PQ Q R%%'-**62 $ $V ,-+ ^^% %!C!CD  O o%  228 ; !((*I 4Y?  *.0BC CC  " "#6#G#G H I I Q x5E0F/G%HHIqPQ$sE78F F%FFrct}|Dchc]%}|jD]}t|r|'}}}|j||,|Dchc]}t|r|}}|j||j D]9}t |} | t | dsJ|j| j;|Scc}}wcc}w)z Return the parameters of the modules in ``ignored_modules`` and the parameters in ``ignored_parameters``. :class:`FlatParameter` s are excluded from the result. r)r+ parametersrr4r-rr3r) r)rrall_ignored_paramsmpparams_in_ignored_modulesparams_in_ignored_parametersrr9s rIrrs36%#!ALLN!'(BTUVBW! !!78%)( 1CA1FA( $(  !!">?!((*K 4Y?  *.0AB BB  % %&9&I&I J K '!( s#C C C%Cc t}|Dchc]}|jD]}|}}}|j|jDchc]\}}||vr t |c}}|j D]9}t |}|t|dsJ|j|j;|Scc}}wcc}}w)z6Return the cleaned buffer FQNs in ``ignored_modules``.r) r+rr4rrr-rr3r) r)rall_ignored_buffer_namesr=rbuffers_in_ignored_modulesrrr9s rIrrs *-("aiik",2"""##(3'@'@'B # V33 k * !((*W 4Y?  *.0GH HH $ + +,?,U,U V W $#'"  s B>C cf|jDchc]\}}t|c}}Scc}}w)zrReturn the fully prefixed names of all buffers in the module hierarchy rooted at ``root_module`` as a class:`set`.)rr)r)rrns rIrrs5>I=V=V=X +9;+&  s-ct||Dchc]}|j}}t|dk(r%tjd|vr| t dyt|dkDrt d|ycc}w)z Raise an error if ``module`` has original parameters on multiple devices, ignoring the parameters in ``ignored_params``. Thus, after this method, the module must be either fully on the CPU or fully on a non-CPU device. r\rNzTTo support a module with both CPU and GPU params, please pass in device_id argument.rMz;FSDP only supports single device modules but got params on )rrrgrr)rrrrdevicess rIrrs*:&.)QRu||RGR 7|qU\\%0G;  5   W I' S   SsA4r? device_handlec ^|yt|tjr|ntj|}|jdk7ri|j]t j d|d|d|jd|jd tj|j}|S)z Return a ``torch.device`` for the specified ``device_id``. Processes ``device_id`` and returns either the corresponding device or ``None`` if ``device_id`` is ``None``. Nrz"FSDP got the argument `device_id` z on rank zJ, which does not have an explicit index. FSDP will use the current device z6. If this is incorrect, please explicitly call `torch.zk.set_device()` before FSDP initialization or pass in the explicit device index as the `device_id` argument.)r_rrrUindexrrcurrent_device)rr?rGrs rIr r <s 5<<8 ell9>U {{e 4 0 9f00=0L0L0N/OPCCI;;-P1 1 m::<= MrKctt||}td|D}|jD]-}||vr|j dD]}||j z}/| xrt xrtd|D}||fS)z Return if ``module`` has parameters on meta device and if ``module`` is using torchdistX deferred initialization. At most of the returned bools can be ``True``. If either is ``True``, then ``module`` needs to be materialized. c34K|]}|jywr^)is_metarbrs rIrdz._need_to_materialize_module..fsC5CsFrecursec3FK|]}tj|ywr^)r/is_fakerNs rIrdz._need_to_materialize_module..rs@ U#@s!)rranyr-rrM_TORCHDISTX_AVAIL)rrrrrrbufrs rIr r Ys*6>BCNCNCCN^^%*  ' $$U$3 *C ckk )N **  A  A @@ @ 6 66rKct|std|dt|t||}|D] }|| y)Nz Expected z to be callable but got )callabler:rU_get_modules_to_materialize)r)rrmodules_to_materializers rIr r wsV M " &>tM?R>S T  9oV(frKrc :|xs#tj|j}t||}d} tj5|D]u}t j |jd|jd}tt|dkD}|sS|j|d|jw dddy#1swYyxYw#t$r5} tjdt!| dt#|d| d} ~ wwxYw)NFrOr)rrPzIUnable to call `reset_parameters()` for module on meta device with error z(. Please ensure that your module oftype z* implements a `reset_parameters()` method.)rrrJrXno_grad itertoolschainr;rrgrto_emptyreset_parameters BaseExceptionrrrrU) r)rrrGmaterialization_devicerYrmodule_state_iterhas_module_statesr7s rIr r s3ell$$&79oV F]]_ .0 .%.OO%%e%4fnnUn6S%!%(->(?$@1$D!$OO+A5OQ++- . . . .   !!$Q)L>!K M  s<C AC!%CCCCC D%0DDc"g}tj|g}|h}|rq|j}|j||j D]:}||vst |||vs|j ||j|<|rq|Sr^) collectionsdequepopleftr#childrenrr0)r)rrYqueuevisited_modulesr child_modules rIrXrXs /1   {m ,E'2mO %%f-"OO- +LO3*<8@ 7##L1 \* +  "!rKrc tjd | tj}|j |g}g}|r|j }|j fd|jdD|j fd|jdD|jD].}t|tjr|j |0|r|D cgc] } | |vs|  } } |D cgc] } | |vs|  } } t| | |ytt||d} | | j k(r t!yyycc} wcc} w)a Move ``module`` depending on ``device_from_device_id`` and its current device. This includes moving ignored modules' parameters. - If ``device_from_device_id`` is not ``None``, then this moves ``module`` to the device. - If ``device_from_device_id`` is ``None``, then this does not move ``module`` but warns the user if it is on CPU. Precondition: ``_check_single_device_module()``. rNc3@K|]}|jk(r|ywr^r)rbrr(s rIrdz)_move_module_to_device..s%<<:-FrOc3@K|]}|jk(r|ywr^rn)rbrr(s rIrdz)_move_module_to_device..s%==J.ro)rrrerfr#rgextendr;rrhr_r1r2_move_states_to_devicenextr_warn_cpu_init)rrrrrirr curr_modulerr>params_to_move bufs_to_moverr(s @rIrrs\$e$J(#."3"3"5 V%'&(--/K MM(33E3B  NN)11%1@  )113 , !)Y-O-OPLL+ ,!&&,Gq/F!GG#*Gaa.FG G~|=RS !&.94 @E U\\Z78 HGs1 E;E EErc6t|dk(rt|dk(ryt|dkDr|dj}nt|dkDr|dj}tjd}||D]k}tj5|j ||_|j *|j j ||j _dddm|D]}|j ||_y|k(r tyy#1swYxYw)z Move states to the specified device. Precondition: ``_check_single_device_module()`` and module's parameters and buffers have been materialized if needed. rNr)rgrrr[todatagradrt)rrrrJr(rrs rIrrrrs  6{aCLA- 6{Q)) W  **e$J( KE K"XX&;< ::)&+jjmm4I&JEJJO K K K  ;F ))$9:FK ; : % &  K Ks A DD c.tjdy)NamThe passed-in `module` is on CPU and will thus have FSDP's sharding initialization run on CPU, which may be slower than on GPU. We recommend passing in the `device_id` argument for FSDP to move `module` to GPU for the sharding initialization. `module` must also be on GPU device to work with the `sync_module_states=True` flag since that requires GPU communication.)rrrKrIrtrts MM 1rKctt||d}|&|jjdk7r |j}n#t j|j }|||k7rt d|d|d||S)a) Determine and return this FSDP instance's compute device. If the module is already on a non-CPU device, then the compute device is that non-CPU device. If the module is on CPU, then the compute device is the current device. Since this method should be called after materializing the module, any non-CPU device should not be meta device. For now, the compute device is always a CUDA or CUDA-like device with its explicit index. Precondition: ``_check_single_device_module()`` and ``_move_module_to_device()``. Nrz4Inconsistent compute device and `device_id` on rank z: z vs )rsrrrUrrJr:)rrrr?rGrrs rIrrs* !&.94 @E U\\..%7m&B&B&DE(^?T-TB4&d#8"9 ;   rKc~g}|jD]}t|tdrt|td|j }t |r>|j \}}|Dcgc]}t||} }|j| |j||D]l} | j } t | r>| j \}}|Dcgc]}t| |} }|j| \|j| nt|t||tdycc}wcc}w)z Synchronize module states (i.e. parameters ``params`` and all not-yet-synced buffers) by broadcasting from rank 0 to all ranks. Precondition: ``sync_module_states == True`` and ``self.process_group`` has been set. FTr)srcN) rgetattr FSDP_SYNCEDsetattrdetachr,__tensor_flatten__rqr#+_check_module_states_for_sync_module_statesr+PARAM_BROADCAST_BUCKET_SIZE) rrr2 module_statesrdetached_bufferattrsrnattr inner_buffersrdetached_param inner_paramss rIrrBs*)+M.." 6v{E2 FK .$mmoO,_=+==?qLQ RD$!? R R$$]3$$_5 61 ( 8%88:HE1FKLdGND9LLL   .   010 ># !SMs +D5D:rcD|rtd|Dr tdyy)Nc3`K|]&}|jtjdk((yw)rN)rr)rbtensors rIrdz>_check_module_states_for_sync_module_states..qs'17 e,,s,.zThe module has CPU parameters or buffers when `sync_module_states=True`, which requires them to be on GPU. Please specify the `device_id` argument or move the module to GPU before passing it to FSDP.)rSr:)rs rIrrns7;H C  }rKc#K|j} t|}||vrt|s|#t$rYywxYww)aD Return an iterator over the original parameters in ``module``. The iterator does not return the parameters in ``ignored_params``, any ``FlatParameter`` s (which may be present due to nested FSDP wrapping), or any original parameters already flattened (only relevant when ``use_orig_params=True``). N)r;rsr StopIteration)rr param_genrs rIrr{sT!!#I OEN*3Ee3L     sA 4 AAAAc t|D]A\}}||vs t|rtd|d|jd|jy)a5 Check that original parameters in ``fsdp_module`` have been flattened. The flattened parameters are made invisible to ``named_parameters()`` for the module hierarchy rooted at ``fsdp_module``. 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