-
Forum
-
메인 게시판
-
Tips
-
리눅스 CPU 사용률 계산하는 법
리눅스 CPU 사용률 계산하는 법
-
hotrod
(hotrod)
-
이 글의 작성자
-
Offline
-
Newbie
-
덜보기
더보기
-
Posts: 48
-
Thank you received: 1
-
-
16 Oct 2019 22:57 #4887
작성자: hotrod
1)
grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage "%"}'
2)
top -bn1 | grep "Cpu(s)" | \
sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | \
awk '{print 100 - $1"%"}'
3)
mpstat | grep -A 5 "%idle" | tail -n 1 | awk -F " " '{print 100 - $ 12}'a
4)
mpstat | awk '$12 ~ /[0-9.]+/ { print 100 - $12"%" }'
5)
mpstat | awk '$3 ~ /CPU/ { for(i=1;i<=NF;i++) { if ($i ~ /%idle/) field=i } } $3 ~ /all/ { print 100 - $field }'
-
jiuer7845
(jiuer7845)
-
-
Offline
-
Newbie
-
덜보기
더보기
-
Posts: 7
-
Thank you received: 0
-
-
10 Apr 2021 14:29 - 29 Apr 2021 17:48 #5230
작성자: jiuer7845
WHAT IS CPU USAGE ANYWAY?
CPU Usage is a picture of how the processors in your machine (real or virtual) are being utilized.
In this context, a single CPU refers to a single (possibly virtualized) hardware hyper-thread. Remember that there might be multiple physical processors in a machine, each with multiple cores, and each core with multiple hyperthreads. In Linux, the hyperthread is the most granular, independently schedulable execution unit. This is the “single CPU”.
Now imagine someone taking a look at all the CPUs every 1/100th of a second, and noting down what type of task each one is executing. There aren’t that many types of tasks (see next section). For each type of task a counter is maintained, so that while sampling if you see that a CPU is executing a particular task type, that counter is incremented. If a CPU executes user code for 1 second, it’s user-code-counter will get incremented by 100.
These counters are maintained by the kernel itself, and can be read from the file /proc/stat (more below).
Note: Technically the magic number 1/100 may be different for your system – you should really be using the value of sysconf(_SC_CLK_TCK) instead.
-
Forum
-
메인 게시판
-
Tips
-
리눅스 CPU 사용률 계산하는 법
Time to create page: 0.064 seconds
