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for automatic parallelisation by 3. Discuss two common data
compilers or runtime systems, leading partitioning strategies, domain
to efficient utilisation of processing decomposition and spatial
resources. decomposition, and provide a real-
world application example for each.
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In conclusion, functional programming 4. Research and identify two emerging Chapter Two: Performance and optimisation of computer processor
offers a unique approach to DLP. By challenges or limitations associated
embracing immutability and pure with thread-level parallelism (TLP)
functions, functional programs naturally in modern processor architectures.
lend themselves to parallel processing. 5. Briefly discuss potential solutions or
This style promotes thread safety, mitigation strategies that computer
simplifies reasoning about concurrent architects might consider to address
execution, and allows for efficient emerging TLP challenges.
utilization of multiple processing units 6. Imagine a program that downloads
in data-intensive applications. a large file (Thread A) and performs
a complex mathematical calculation
(Thread B) concurrently. Analyse
Exercise 2.10
two scenarios:
1. Analyse the following applications (a) Scenario 1: No data
and explain how SIMD instructions dependencies exist between
can be beneficial in each scenario: Thread A and Thread B.
(a) Image processing (applying (b) Scenario 2: Thread B relies on
a filter to a high-resolution the completion of Thread A
image) to access specific downloaded
(b) Audio processing (encoding/ data for the calculation.
decoding an audio file) 7. Explain how the presence or
(c) Scientific computing absence of data dependencies
(performing vectorised would impact the execution flow
calculations on large datasets) and potential performance benefits
of multithreading in these scenarios
2. Imagine you are working on a
program that analyses website
traffic data from millions of users.
How can data partitioning be Chapter summary
advantageous in this scenario?
Consider factors such as improved Reflect on what you have learnt from
performance, scalability, and this chapter, summarise and keep it in
efficient resource utilisation. your portfolio.
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Student’s Book Form Five
Computer Science Form 5.indd 121 23/07/2024 12:33
