Top research

notatki/top-kill-monitoring/README.md

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+### RESEARCH
+cgroups.txt - WYNIK researchu, ograniczanie zasobów (CPU,pamięć) dla grup procesów już zawczasu
+
+top.txt - przedmiot researchu
+
+glances.txt - alternatywa top napisana w pythonie, być może bardziej nadaje się do analizy w ramach zajęć
+
+kill important tip (https://docs.oracle.com/cd/E19120-01/open.solaris/819-2380/eoizf/index.html):
+"When using the kill command to stop a process, first try using the command by itself, without including a signal option. Wait a few minutes to see if the process terminates before using the kill command with the -9 signal."
+
+### kto ? co ?po co ? dlaczego?
+Top jest jednym z programów zawartych w zestawie w procps ( https://www.systutorials.com/where-is-the-source-code-for-the-free-command-on-linux/ )
+
+The following programs are found in procps:
+
+free - Report the amount of free and used memory in the system
+kill - Send a signal to a process based on PID
+pgrep - List processes based on name or other attributes
+pkill - Send a signal to a process based on name or other attributes
+pmap - Report memory map of a process
+ps - Report information of processes
+pwdx - Report current directory of a process
+skill - Obsolete version of pgrep/pkill
+slabtop - Display kernel slab cache information in real time
+snice - Renice a process
+sysctl - Read or Write kernel parameters at run-time
+tload - Graphical representation of system load average
+top - Dynamic real-time view of running processes
+uptime - Display how long the system has been running
+vmstat - Report virtual memory statistics
+w - Report logged in users and what they are doing
+watch - Execute a program periodically, showing output fullscreen
+
+
+

notatki/top-kill-monitoring/cgroups.txt

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+### cgroups research cgroups.txt
+
+
+https://scoutapm.com/blog/restricting-process-cpu-usage-using-nice-cpulimit-and-cgroups

notatki/top-kill-monitoring/glances.txt

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+### glances  reserch glances.txt
+
+Opis co i jak
+https://www.tecmint.com/glances-an-advanced-real-time-system-monitoring-tool-for-linux/
+
+kod źródłowy
+https://github.com/nicolargo/glances
+analizę możnaby zacząc najlepiej od np pierwszej wersji
+https://github.com/nicolargo/glances/tree/v1.0

notatki/top-kill-monitoring/top.txt

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+# TOP reserch top.txt
+# alternatywnie glances.txt - alternatywa top napisana w pythonie
+
+### UZYCIE
+przykłady
+https://www.geeksforgeeks.org/top-command-in-linux-with-examples/
+
+strace - podgląd jakie pliki otwiera dany proces czyli np interesujący nas top
+https://stackoverflow.com/questions/3371131/need-the-source-code-for-top-and-find-the-connection-between-top-and-proc-dire
+
+procps - np podejrzenie w top konkretnego procesu
+https://opensource.com/article/21/8/linux-procps-ng
+https://www.mankier.com/1/top
+ciekawa komenda
+top -p $(pgrep -d ',' process_name)
+użycie naprzykład:
+top -p $(pgrep -d ',' nginx)
+
+Nie wiem czy jest sens brnąć w dalszy research w tym kierunku ale
+przykładowe komendy które można kolejno puścić w terminalu poniżej, z programów wychodzimy naciskając q:
+sudo su
+top -d 1
+top -d 5
+top -d 5 >> toptxt.txt
+ll
+nano toptxt.txt
+strace -e open top
+strace -e open top >> starce.txt
+ll
+nano strace.txt
+strace top | grep open
+
+### CIEKAWOSTKI
+
+źródła kodu top - napisane w C raczej jako ciekawostka
+z repo trovaldsa
+https://github.com/torvalds/linux/blob/master/tools/perf/builtin-top.c
+interaktywne
+https://elixir.bootlin.com/linux/latest/source/tools/perf/builtin-top.c