com.intel.analytics.bigdl.dataset.Utils.scala Maven / Gradle / Ivy
/*
* Copyright 2016 The BigDL Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intel.analytics.bigdl.dataset
import com.intel.analytics.bigdl.utils.Engine
import org.apache.log4j.Logger
object Utils {
private val logger = Logger.getLogger(getClass)
def getBatchSize(batchSize : Int, totalPartition: Option[Int] = None): Int = {
val nodeNumber = Engine.nodeNumber()
val partitionNum = totalPartition.getOrElse(nodeNumber)
logger.debug(s"partition number: $partitionNum, node number: $nodeNumber")
require(partitionNum > 0,
s"Utils.getBatchSize: partitionNum should be larger than 0, but get $partitionNum")
require(batchSize % partitionNum == 0, s"Utils.getBatchSize: total batch size $batchSize " +
s"should be divided by partitionNum ${partitionNum}")
val batchPerUnit = batchSize / partitionNum
logger.debug(s"Batch per unit: $batchPerUnit")
batchPerUnit
}
}