Composite Call

NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

TECHNICAL SEMINAR ON COMPOSITE CALL Presented by Chinmayee Mishra under the guidance of Mr. Anisur Rahman

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

INTRODUCTION In operating systems, invoking a system service is usually a heavy-weight operation due to protection domain crossing. In distributed systems, invoking remote services is more expensive than invoking local services due to network latency and processing overhead. The COMPOSITECALL design pattern enables the extension of server interfaces for safe execution of repeated sequences of service calls and simple control structures. The pattern is also known as BATCHING [1]. It provides the means to compose separate calls to a server into a single one. A COMPOSITECALL is indeed a program a client sends for execution in the server domain. Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

MAIN PARTICIPANT IN COMPOSITE CALL

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

COMPOSITE CALL PATERN

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

COMPOSITE CALL INSTANCES FOR LINUX SYSTEM CALLS

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

NORMAL SYSTEM CALL PATH

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

COMPOSITE CALL BASED COPY vs TRADIONAL COPY ON LINUX

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

COMPOSITE CALL BASED COPY vs NFS BASED COPY

Presented by :: Chinmayee Mishra (CS200163374)

[L01-8]

NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

CONCLUSION Experimental results show that, although the COMPOSITECALL mechanism can provide great performance improvements, its use must be carefully analyzed. In some cases, the overhead it imposes may be larger than the performance gain it provides. We plan to perform further experiments on distributed services where we expect to obtain very significant speedups.

Presented by :: Chinmayee Mishra (CS200163374)

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NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

Technical Seminar Presentation - 2004

THANK YOU

Presented by :: Chinmayee Mishra (CS200163374)[L01-10]