Tag: Memory

• The five minute rule etc., redux

  

  So I made a bit of a mess with this the the first time round and when it ended up on Slashdot (I had assumed that wasn’t happening as the delay between positing and it appearing was a few days), I was left rather embarrassed. With a thanks to all those who commented and pointed…

  Adrian McMenamin

  November 24, 2020

  Uncategorized

  computing power, Five byte rule, Five minute rule, Memory, MIPS

• None of the easy things work

  This is a post about my PhD research: in fact it is a sort of public rumination, an attempt to clarify my thoughts in writing before I take the next step. It’s also possibly an exercise in procrastination: a decision to write about what I might do next, rather than to get on with doing…

  Adrian McMenamin

  April 21, 2014

  Uncategorized

  Amdahl’s law, Central processing unit, computer science, Hardware, Memory, Multi-core processor, Network-on-Chip, Page replacement algorithm, Parallel computing, programming

• The cost of soft/minor faults

  Here is a complete graph of the memory use and fault count for a run of ls -lia. As you can see there are only soft/minor faults here – as one would expect (this was a machine with a lot of memory), as the C library provides the ls function and it will be loaded…

  Adrian McMenamin

  November 23, 2011

  Uncategorized

  hard faults, Hardware, Linux, major faults, Memory, minor faults, Operating Systems, Page fault, soft faults, working set size

• Some thoughts on the Linux page cache

  I am still waiting the result of the Birkbeck exam board to find out whether I have been awarded the MSc, but I think I have waited long enough before discussing my thoughts on some of the issues around page caching my project raised. Linux‘s page caching is based on the “2Q” concept – pages…

  Adrian McMenamin

  November 5, 2011

  Uncategorized

  2Q, active queue, Cache, inactive queue, Linux, Memory, Mozilla Firefox, Page cache