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A hardware implementation of realloc function

INTEGRATION-THE VLSI JOURNAL 1999年第2期28卷 173-184页

作者： Srisa-an, W Lo, CTD Chang, JM IIT Dept Comp Sci Chicago IL 60616 USA

The memory intensive nature of object-oriented languages such as C + + and Java has created the need of a high-performance dynamic memory management. Object-oriented applications often generate higher memory intensity in the heap region. Thus, high-performance memory manager is needed to cope with such applications. As today's VLSI technology advances, it becomes more and more attractive to map basic software algorithms such as malloc(),free(), and realloc() into hardware. This paper presents a hardware design of realloc function that fully utilizes the advantage of combinational logic. There are two steps needed to complete a reallocation process: (a) try to reallocate on the original memory block and (b) if (a) failed, allocate another memory block and copy the contents of the original block to this new location. In our scheme, (a) can be done in constant time. For (b), the allocation of new memory block and the deallocation of original block are done in constant time. The hardware complexity of proposed scheme (i.e. X-unit, RS-unit, and ESG-unit) is O(n), where n represents the size of bit-map. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

关键词： hardware algorithms VLSI systems dynamic memory management algorithms expand() realloc()

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Object resizing and reclamation through the use of hardware bit-maps

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MICROPROCESSORS AND MICROSYSTEMS 2002年第9-10期25卷 459-467页

作者： Srisa-an, W Lo, CTD Chang, JM IIT Dept Comp Sci Chicago IL 60616 USA

The memory intensive nature of object-oriented languages such as C++ and Java has created the need of a high-performance dynamic memory management. Object-oriented applications often generate higher memory intensity in the heap region. Thus, high-performance memory manager is needed to cope with such applications. As today's VLSI technology advances, it becomes more and more attractive to map software algorithms such as malloc(), free(), realloc(), and garbage collection into hardware. This paper presents hardware designs of realloc function and sweeping function (for mark and sweep garbage collection) that fully utilize the advantages of combinational logic. In our scheme, the reallocation on the original block can be done in constant time. If the reallocation on the original block is not possible, the previously proposed malloc() and free() can be used to move the contents to a new location. For the sweeping function, the bit-sweeper can detect and sweep the garbage in constant time. Since the sweeping phase often consumes more time than the marking phase, the garbage collection time can be substantially improved. The hardware complexity of proposed scheme (i.e. X-Unit, RS-unit, ESG-unit, and bit-sweeper) is O(n), where n represents the size of bit-map. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： hardware algorithms VLSI systems dynamic memory management algorithms expand() realloc() mark and sweep garbage collection

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A hardware implementation of Realloc function

A hardware implementation of <i>Realloc</i> function

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IEEE-Computer-Society Workshop on VLSI (WVLSI 99) - System Level Design

作者： Srisa-an, W Lo, CTD Chang, JM IIT Dept Comp Sci Chicago IL 60616 USA

ISBN: (纸本)0769501524

The memory intensive nature of object-oriented languages such as C++ and Java has created the need of a high-performance dynamic memory management. Object-oriented applications often generate higher memory intensity in the heap region. Thus, high-performance memory manager is needed to cope with such applications. As today's VLSI technology advances, it becomes more and more attractive to map basic software algorithms such as malloc(), free(), and realloc() into hardware. This paper presents a hardware design of realloc function that fully utilizes the advantage of combinational logic. There are two steps needed to complete a reallocation process: (a) try to reallocate on the original memory block and (b) if (a)failed, allocate another memory block and copy the contents of the original block to this new location. In our scheme, (a) can be done in constant time. For (b), the allocation of new memory block and the deallocation of original block are done in constant time. The hardware complexity of proposed scheme (i.e. X-unit, RS-unit, and ESG-unit) is O(n), where n represents the size of bit-map.

关键词： hardware algorithms VLSI systems dynamic memory management algorithms expand realloc

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