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Q. What is Shared Memory Programming?
We know all processors share a common memory in shared memory model. Every processor can be assigned a separate portion of program stored in memory to execute with data stored in specified locations. Every processor does calculation independently with data assigned to them by controlling program known as the main program. After finishing their calculations all of these processors unite the main program. The main program completes only after all child processes have been finished completely. There are plentiful alternatives to apply these ideas by high level programming. Few of them are:
i) Employing heavy weight processes.
ii) Employing threads. (E.g. Pthreads).
iii) Using a totally new programming language for parallel programming (E.g. Ada).
iv) Employing library routines with existing sequential programming language.
v) Editing the syntax of an existing sequential programming language to create a parallel programming language (e.g. UPC).
vi) Using an existing sequential programming language supplemented with compiler directives for specifying parallelism (e.g. OpenMP)
We will take the last alternative. We will also give an introduction to shared programming employing library routines with an existing sequential programming language.
State the criteria which a trusted publisher should meet before adding him? Ans) The following criteria should be met by the publisher before adding him to the list. ? The
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Control Unit (CU) : Every PEs are under the control of one control unit. CU controls the inter communication among the PEs. There is a local memory of CU also known as CY memory.
Given the subsequent FIFO and rules, how deep does the FIFO require to be to stop underflow or overflow? RULES: a. frequency(clk_A) = frequency(clk_B) / 4 b. per
Q. Show the conditional jump in program? CMP AX, BX ; compare instruction: sets flags JNE FIX ; if not equal do addi
RAW and WAW - Data hazards: RAW (read after write) - j tries to read a source before i writes it, hence j wrongly gets the old value .This is the most usual type of
Q. Determine the odd parity bit for F. Q. Convert the following from binary to decimal, hexadecimal, BCD and octal. a) 1000000011 b) 0001010110101 c) 1 Q. Convert the f
The combination of an IP address and a port number is known as a socket.
what is Ambiguity in single inheritance
Returns the information about tasks running int info = pvm_tasks( int where, int *ntask, struct pvmtaskinfo **taskp ) struct pvmtaskinfo { int ti_tid; int ti_pt
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