# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/ggnpzkq
Ftrace 技術揭祕:解密 Linux 內核追蹤神器**
前言:雖然之前一直聽說過 ftrace,但從來沒將它用在實戰中,在一次客戶排查問題中,遇到了比較奇怪的現象,一位精通內核的朋友建議使用 ftrace 來定位一下。雖然那一次並沒有使用 ftrace,但也讓我覺得,後面我們勢必要提供 ftrace 相關的工具幫助我們在線上定位問題,所以自己也決定重新學習使用下 ftrace,當然也決定寫一系列的相關出來,這裏就先簡單介紹下 ftrace。一、什麼是 ⌘ Read more