ablog

不器用で落着きのない技術者のメモ

top の起源は VMS の MONITOR PROCESS/TOPCPU コマンド

top コマンドは William LeFebvre が VMS の MONITOR PROCESS/TOPCPU コマンドにインスパイアされて1984年にBSD 用に作ったのが起源らしい。へーと思ったのでメモ。

Systems Performance: Enterprise and the Cloud

Systems Performance: Enterprise and the Cloud

6.6.6. top
top(1) was created by William LeFebvre in 1984 for BSD. He was inspired by the VMS command MONITOR PROCESS/TOPCPU, which showed the top CPU-consuming jobs with CPU percentages and an ASCII bar chart histogram (but not columns of data).