CS501 : Advance Computer Architecture

CS501: Advance Computer Architecture Assignment # 03

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    Advance Computer Architecture (CS501)
    Assignment # 03 (GRADED)
    Total marks = 20
    Deadline Date = 16-01-2017

    Please carefully read the following instructions before attempting the assignment.
    Assignment Guidelines:
    It should be clear that your assignment would not get any credit if:
    The assignment is submitted after due date.
    The submitted assignment does not open or file is corrupt.
    The assignment is copied. Note that strict action would be taken if the submitted assignment is copied from any other student. Both students will be punished severely.

    1) You should consult recommended books to clarify your concepts as handouts are not sufficient.
    2) You are supposed to submit your assignment in .doc or docx format. Any other formats like scan images, PDF, Zip, rar and bmp etc. will not be accepted.
    3) You are advised to upload your assignment at least two days before due date.

    Important Note:
    Assignment comprises of 20 Marks. Note that no assignment will be accepted after due date via email in any case (whether it is the case of load shedding or emergency electric failure or internet malfunctioning etc.). Hence, refrain from uploading assignment in the last hour of the deadline, and try to upload Solutions at least 02 days before the deadline to avoid inconvenience later on.
    For any query please contact: [email protected]

    The objective of this assignment is to assess understanding of,
    Memory Mapped I/O versus Isolated I/O
    Considerations during I/O Subsystem Design
    CPU performance
    I/O Buses

    Question # 1: 10 Marks

    In the following table, different parameters (Elapsed time and CPU time) are given in the context of CPU performance; you need to calculate the I/O time and percentage of elapsed time on each I/O operation.

    Elapsed Time

    CPU Time

    I/O Time

    Percentage of Elapsed Time

    400 sec

    320 sec

    313 sec

    238 sec

    252 sec

    189 sec

    111 sec

    78 sec

    541 sec

    392 sec

    Question # 2: 10 Marks

    In the following table, different parameters (bus request time, arbitration time and average time to complete an operation) are given in the context of Bus Arbitration; you need to calculate the maximum number of IOPS (Input/Output Operations Per Second) and discuss the possibility of performing 30 million IOPS on each bus.

    Note: nsec = nano seconds = 10-9 seconds

    Bus Request Time

    Arbitration Time

    Average Time to complete an Operation

    Maximum No. of IOPS


    Is possible to perform 30 million IOPS


    11 nsec

    12 nsec

    10 nsec

    8 nsec

    9 nsec

    12 nsec

    10 nsec

    10 nsec

    15 nsec

    14 nsec

    8 nsec

    12 nsec

    15 nsec

    19 nsec

    10 nsec

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