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| author | Jasper Ras <jras@hostnet.nl> | 2025-03-20 11:07:49 +0100 |
|---|---|---|
| committer | Jasper Ras <jras@hostnet.nl> | 2025-03-20 11:07:49 +0100 |
| commit | 80ccf68f55dbb70d7e5ed52ee95b3c9d1b6ce264 (patch) | |
| tree | 93e28e85ab70052aa6f577998ec7dc1f413b40c0 /1 Projects/OSTEP/Process.md | |
| parent | 9642cd7ae24f0ba79ce5647c709b35ae8f06a285 (diff) | |
vault backup: 2025-03-20 11:07:48
Diffstat (limited to '1 Projects/OSTEP/Process.md')
| -rw-r--r-- | 1 Projects/OSTEP/Process.md | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/1 Projects/OSTEP/Process.md b/1 Projects/OSTEP/Process.md new file mode 100644 index 0000000..78d074e --- /dev/null +++ b/1 Projects/OSTEP/Process.md @@ -0,0 +1,20 @@ +--- +tags: + - ostep +--- +Process = abstraction of **running program**. Program = lifeless code stored on disk. +**Mechanisms** are low-level protocols that implement needed piece of functionality. Example a **context-switch** that enables time-sharing the CPU. +**Policies** are algorithms to make a decision; such as which program to run. + +Process = **Machine state**. Important parts of the system. Its address space: the memory allocated by the OS. +The program counter; which instruction is being executed. +Stack & frame pointer: the stack for function params, return addresses and local variables. + +Seperating the mechanisms (how) from policies (which) allows changing either seperately from one another. + +API: +- Create : create new process to run a program +- Destroy : kil preemptively +- Wait : stop running +- Misc control: e.g suspend/resume +- Status : e.g ps axf
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