encoded ds config into command line argument when launching child processes in autotuning (#2524)

* rollback ds config changes

* fix format

* Fix error when output_file is a relative path without a prefix (#2397)
Co-authored-by: NBenjamin Steenhoek <benjaminjsteenhoek@gmail.com>

* fix restuls and exprs path to use absolute path

* use base64 encoded ds config as cmd arg

* fix format

* remove assert

* write out optimial config after tuning

* fix format

* no need to update ds config path when encoding ds config

* udpate

* do not use abs path for result and expr dir

* fix conflicts

* fix run mode

* fix format

* fix format
Co-authored-by: NBenjamin Steenhoek <benjaminjsteenhoek@gmail.com>
Co-authored-by: NOlatunji Ruwase <olruwase@microsoft.com>

deepspeed/autotuning/autotuner.py

@@ -87,6 +87,8 @@ class Autotuner:
             self.rm.nodes), "num_nodes in the autotuning configuration must not be less than the --num_nodes value in the train script if any"
 
         self.records = {}
+        self.optimal_cmd = None
+        self.optmal_ds_config = None
 
     def print_tuning_results(self):
         """Print the autotuning results in tabular format.
@@ -1125,9 +1127,6 @@ class Autotuner:
             ds_config_path = os.path.join(self.results_dir, "ds_config_optimal.json")
             json.dump(ds_config, open(ds_config_path, "w"))
 
-            idx = cmd.index(os.path.join(exp_dir, "ds_config.json"))
-            cmd[idx] = ds_config_path
-
             cmd_path = os.path.join(self.results_dir, "cmd_optimal.txt")
             with open(cmd_path, "w") as fd:
                 fd.write(" ".join(cmd))
@@ -1138,9 +1137,6 @@ class Autotuner:
             logger.info(
                 f"Wrote the optimal DeepSpeed configuration found by autotuning to {ds_config_path}, and the corresponding DeepSpeed command to {cmd_path}"
             )
-        else:
-            self.optimal_cmd = None
-            self.optmal_ds_config = None
 
     def run_after_tuning(self):
         """ Launches the training with the optimal DeepSpeed configuration found through the autotuning process.

deepspeed/autotuning/config.py

@@ -38,15 +38,13 @@ class DeepSpeedAutotuningConfig(DeepSpeedConfigObject):
                                      AUTOTUNING_FAST,
                                      AUTOTUNING_FAST_DEFAULT)
 
-        self.results_dir = os.path.abspath(
-            get_scalar_param(autotuning_dict,
-                             AUTOTUNING_RESULTS_DIR,
-                             AUTOTUNING_RESULTS_DIR_DEFAULT))
+        self.results_dir = get_scalar_param(autotuning_dict,
+                                            AUTOTUNING_RESULTS_DIR,
+                                            AUTOTUNING_RESULTS_DIR_DEFAULT)
         assert self.results_dir, "results_dir cannot be empty"
-        self.exps_dir = os.path.abspath(
-            get_scalar_param(autotuning_dict,
-                             AUTOTUNING_EXPS_DIR,
-                             AUTOTUNING_EXPS_DIR_DEFAULT))
+        self.exps_dir = get_scalar_param(autotuning_dict,
+                                         AUTOTUNING_EXPS_DIR,
+                                         AUTOTUNING_EXPS_DIR_DEFAULT)
         assert self.exps_dir, "exps_dir cannot be empty"
         self.overwrite = get_scalar_param(autotuning_dict,
                                           AUTOTUNING_OVERWRITE,

deepspeed/autotuning/scheduler.py

@@ -6,12 +6,13 @@ import subprocess
 import sys
 import threading
 import time
+import base64
 
+import os
 import hjson
 from tqdm import tqdm
 
 from ..utils import logger
-from .constants import *
 from .constants import AUTOTUNING, AUTOTUNING_METRIC_PATH
 from .utils import get_val_by_key, search_error, was_interruptted
 """
@@ -180,7 +181,6 @@ class ResourceManager:
                 logger.debug(f'Put exp_id = {exp["exp_id"]} back into the queue')
                 self.experiment_check(pbar)
             else:
-
                 desc = ""
                 for reservation in reservations:
                     reservation.slots.sort()
@@ -336,19 +336,27 @@ def run_experiment(exp: dict, reservations, user_script, user_args):
     exp["job_id"] = get_job_id()
     exp_dir = exp["result_dir"]
     os.makedirs(exp_dir, exist_ok=True)
-
-    exp["ds_config_path"] = os.path.join(exp_dir, "ds_config.json")
+    ds_config_path = os.path.join(exp_dir, "ds_config.json")
+    exp["ds_config_path"] = ds_config_path
 
     ds_config = copy.deepcopy(exp["ds_config"])
+    ds_config_json = json.dumps(ds_config).encode('utf-8')
+
+    exp["ds_config_base64"] = base64.urlsafe_b64encode(ds_config_json).decode('utf-8')
 
     with open(exp["ds_config_path"], "w", buffering=BUFSIZE) as fd:
         json.dump(ds_config, fd)
         fd.flush()
         os.fsync(fd)
+        path = exp["ds_config_path"]
+        logger.info(f"Scheduler wrote ds_config to {path}, {os.path.abspath(path)}")
+
     with open(os.path.join(exp_dir, "exp.json"), "w", buffering=BUFSIZE) as fd:
         json.dump(exp, fd)
         fd.flush()
         os.fsync(fd)
+        path = os.path.join(exp_dir, "exp.json")
+        logger.info(f"Scheduler wrote exp to {path}, {os.path.abspath(path)}")
 
     # remove "--deepspeed_config ds_config.json" from user_args
     if user_args:
@@ -357,9 +365,10 @@ def run_experiment(exp: dict, reservations, user_script, user_args):
         # "--deepspeed_config" is omitted in HF
         elif "--deepspeed" in user_args:
             idx = user_args.index("--deepspeed")
-        assert idx < len(user_args) and ".json" in user_args[idx +
-                                                             1], "there is no ds_config file specified after --deepspeed_config or --deepspeed"
-        user_args[idx + 1] = exp["ds_config_path"]
+        assert idx < len(user_args), "there is no ds_config file specified after --deepspeed_config or --deepspeed"
+        # user_args[idx + 1] = exp["ds_config_path"]
+        # pass base64 serialized ds_config to launcher
+        user_args[idx + 1] = exp["ds_config_base64"]
 
     exp["user_script"] = user_script
     exp["user_args"] = user_args
@@ -375,7 +384,7 @@ def run_experiment(exp: dict, reservations, user_script, user_args):
         os.fsync(fd)
 
     logger.info(
-        f"Launching exp_id = {exp['exp_id']}, exp_name = {exp['name']}, with resource = {include_str}"
+        f"Launching exp_id = {exp['exp_id']}, exp_name = {exp['name']}, with resource = {include_str}, and ds_config = {os.path.abspath(ds_config_path)}"
     )
 
     with open(os.path.join(exp_dir, "stdout.log"), "wb") as out, open(

deepspeed/runtime/config.py

@@ -8,6 +8,7 @@ from typing import Union
 import torch
 import json
 import copy
+import base64
 
 from .constants import *
 from .fp16.loss_scaler import (
@@ -724,9 +725,13 @@ class DeepSpeedConfig(object):
                      "r"),
                 object_pairs_hook=dict_raise_error_on_duplicate_keys)
         else:
-            raise ValueError(
-                f"Expected a string path to an existing deepspeed config, or a dictionary. Received: {config}"
-            )
+            try:
+                config_decoded = base64.urlsafe_b64decode(config).decode('utf-8')
+                self._param_dict = json.loads(config_decoded)
+            except (UnicodeDecodeError, AttributeError):
+                raise ValueError(
+                    f"Expected a string path to an existing deepspeed config, or a dictionary or a valid base64. Received: {config}"
+                )
         try:
             self.global_rank = dist.get_rank()
             if mpu is None:

deepspeed/runtime/engine.py

@@ -956,12 +956,6 @@ class DeepSpeedEngine(Module):
                     args, "deepspeed_config") and args.deepspeed_config is not None
             ), "DeepSpeed requires --deepspeed_config to specify configuration file"
 
-            assert os.path.isfile(
-                args.deepspeed_config
-            ), "DeepSpeed configuration file: {} is not an existing file".format(
-                args.deepspeed_config
-            )
-
     def _is_supported_optimizer(self, optimizer_name):
         return (optimizer_name in DEEPSPEED_OPTIMIZERS
                 or getattr(torch.optim,
@@ -2162,6 +2156,9 @@ class DeepSpeedEngine(Module):
             msg["throughput"] = self.train_batch_size() * 1000 / \
                 msg["latency"]
             print_json_dist(msg, [0], path=self.autotuning_metric_path())
+            log_dist(
+                f"Wrote metrics to {self.autotuning_metric_path()}, {os.path.abspath(self.autotuning_metric_path())}",
+                ranks=[0])
             import atexit
             atexit.register(print, "Autotuning: done with running current ds config.")
         exit()