#!/bin/bash

#SBATCH <SLURM OPTIONS> --nodes=1 --exclusive --ntasks-per-node=8 --job-name=megatron_gpt_switch

DIR=`pwd`
DATETIME=`date +'date_%y-%m-%d_time_%H-%M-%S'`
mkdir -p $DIR/logs

CHECKPOINT_DIR="<PATH TO CHECKPOINT DIR>"
TENSORBOARD_DIR="<PATH TO TENSORBOARD DIR>"
DATA_BLEND="<PATH TO DATA BLEND>"
BPE_DIR="<PATH TO BPE DIR>"

options=" \
    --exit-duration-in-mins 230 \
    --tensor-model-parallel-size 1 \
    --pipeline-model-parallel-size 1 \
    --num-layers 24 \
    --hidden-size 1024 \
    --num-attention-heads 16 \
    --seq-length 2048 \
    --max-position-embeddings 2048 \
    --micro-batch-size 4 \
    --global-batch-size 256 \
    --train-samples 192000000 \
    --lr-decay-samples 166400000 \
    --lr-warmup-samples 162761 \
    --lr 3.0e-4 \
    --min-lr 3.0e-5 \
    --lr-decay-style cosine \
    --log-interval 100 \
    --eval-iters 50 \
    --eval-interval 2000 \
    --data-path ${DATA_BLEND} \
    --vocab-file ${BPE_DIR}/gpt2-vocab.json \
    --merge-file ${BPE_DIR}/gpt2-merges.txt \
    --save-interval 10000 \
    --save ${CHECKPOINT_DIR} \
    --load ${CHECKPOINT_DIR} \
    --split 98,2,0 \
    --clip-grad 1.0 \
    --weight-decay 0.1 \
    --adam-beta1 0.9 \
    --adam-beta2 0.95 \
    --init-method-std 0.02 \
    --log-params-norm \
    --log-num-zeros-in-grad \
    --fp16 \
    --DDP-impl torch \
    --tensorboard-dir ${TENSORBOARD_DIR} \
    --checkpoint-activations "

run_cmd="cd $DIR && python pretrain_gpt.py ${options}"

srun -l \
     --container-image "nvcr.io/nvidia/pytorch:20.12-py3" \
     --container-mounts "<DIRECTORIES TO MOUNT>" \
     --output=$DIR/logs/%x_%j_$DATETIME.log sh -c "${run_cmd}"

set +x