# Parallel Implementation Of Sorting Algorithms

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IJCSI International Journal of Computer Science Issues, Vol. 9, Issue 4, No 3, July 2012ISSN (Online): 1694-0814www.IJCSI.org164Parallel Implementation of Sorting AlgorithmsMalika Dawra1, and Priti21Department of Computer Science & ApplicationsM.D. University, Rohtak-124001, Haryana, India2Department of Computer Science & ApplicationsM.D. University, Rohtak-124001, Haryana, IndiaAbstractA sorting algorithm is an efficient algorithm, whichperform an important task that puts elements of a list in acertain order or arrange a collection of elements into aparticular order. Sorting problem has attracted a greatdeal of research because efficient sorting is important tooptimize the use of other algorithms such as binarysearch. This paper presents a new algorithm that willsplit large array in sub parts and then all sub parts areprocessed in parallel using existing sorting algorithmsand finally outcome would be merged. To process subparts in parallel multithreading has been introduced.Keywords: sorting, algorithm, splitting, merging, Usage of memory and other computerresources is also a factor in classifying thesorting algorithms. Recursion: some algorithms are eitherrecursive or non recursive, while othersmay be both. Whether or not they are a comparison sortexamines the data only by comparing twoelements with a comparison operator.There are several sorting algorithms available tosort the elements of an array. Some of the sortingalgorithms are:multithreading.Bubble sort1. IntroductionIn the bubble sort, as elements are sorted theygradually “bubble” (or rise) to their proper locationin the array. Bubble sort was analyzed as early as1956 [1]. The bubble sort compares adjacentelements of an array until the complete list getssorted.Sorting is the process of putting data in order; eithernumerically or alphabetically. It is necessary toarrange the elements in an array in numerical orlexicographical order, sorting numerical values indescending order or ascending order andalphabetical value like addressee key [5, 6]. Manyexisting sorting algorithms were observed in termsof the efficiency of the algorithmic complexity [9].All sorting algorithms are appropriate for specifickinds of problems. Some sorting algorithms workon less number of elements, some are used for hugenumber of data, some are used if the list hasrepeated values, and some are suitable for floatingpoint numbers. Sorting is used in many importantapplications and there have been a plenty ofperformance analysis [7]Sorting algorithms are classified by: Computational complexity in terms ofnumber of swaps. Sorting methodsperform various numbers of swaps in orderto sort a data. System complexity of computational. Inthis case, each method of sorting algorithmhas different cases of performance. Theyare worst case, when the integers are not inorder and they have to be swapped at leastonce. The term best case is used todescribe the way an algorithm behavesunder optimal conditions.Selection SortThe selection sort is a combination of sorting andsearching. During each pass, the unsorted elementwith the smallest (or largest) value is moved to itsproper position in the array. The selection sort hasa complexity of O(n2) [3].Insertion SortThe insertion sort splits an array into two subarrays. The first sub-array is sorted and increases insize as the sort continues. The second sub-array isunsorted, contains all the elements yet to beinserted into the first sub-array, and decreases insize as the sort continues. If an application onlyneeds to sort smaller amount of data, then it issuitable to use this algorithm [2].Shell SortThe shell sort repeatedly compares elements thatare a certain distance away from each other. Theshell sort is a “diminishing increment sort”, betterknown as a “comb sort” [8]. The algorithm makesmultiple passes through the list, and each time sortsCopyright (c) 2012 International Journal of Computer Science Issues. All Rights Res

Classify the data in separate arrays on the basis of data type and number of digit Use sorting techniques on them in parallel. And parallel implementation is done using multithreading. Merge sorted array of 1 digit, 2digit, 3 digit ,4 digit, 5 digit , 6 digit and more digit integer and create a large array

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