Some problems and more…

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Some problems and more… COMP28112 – Lecture 20 Some problems and more… 24-Nov-18 COMP28112 Lecture 20

The importance/usefulness of keeping logs of activity 24-Nov-18 COMP28112 Lecture 20

Messages to the server based on hour of the day (0-1, 1-2, …, 23-24) 2014 2013 2015 (120853 messages) 2016 (88718 messages)

(111710) Messages to the server based on hour of the day (0-1, 1-2, …, 23-24) 2017 (111710 messages) 24-Nov-18 COMP28112 Lecture 20

(106109) Messages to the server based on hour of the day (0-1, 1-2, …, 23-24) 2018 (106109 messages) 24-Nov-18 COMP28112 Lecture 20

What day of the week was busiest? (1: Mon, 7: Sun) 2013 2014 2015 2016 24-Nov-18 COMP28112 Lecture 20

What day of the week was busiest? (1: Mon, 7: Sun) 2017 24-Nov-18 COMP28112 Lecture 20

What day of the week was busiest? (1: Mon, 7: Sun) 2018 24-Nov-18 COMP28112 Lecture 20

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Some problems… Marking sessions for the labs: May 8, 9, 11 When is it best to execute two tasks on one machine as opposed to one task on one machine + communication (data transfer) and computation on another? How to design random values, which are not uniform? E.g., two-digit integer where the probability is: 0-9 (90%) and 10-99 (10%) How to compute the average of streamed data? (related to lab exercise 3, where you have to compute the average over large values) Split the following loop, so that each of 4 threads takes the same amount of computation. Rewrite, in terms of t, where t is between 0 and 3. for(i=0;i<1000;i++) { some_computation_on_i; } Marking sessions for the labs: May 8, 9, 11 All your lab work should be marked by May 11!