tree 553b3febc1b3c85ac0b2076c4e8cdf9d4b07536d
parent 819d1a768426dfa7830a0a38fa56dc5972e7cd14
author Chinglin Yu <chinglinyu@google.com> 1731574730 +0800
committer Chinglin Yu <chinglinyu@google.com> 1731574730 +0800

tp: fix kernel idle tasks for boot-time traces

In boot-time traces, CPU scheduling tracks contain "swapper/0" tasks,
which should be hidden on the UI. These idle tasks show up because
kernel startup traces contain the following events:

event {
  timestamp: 17000000
  pid: 1
  task_newtask {
    pid: 0
    comm: "swapper/0"
    clone_flags: 256
    oom_score_adj: 0
  }
}

that /sbin/init creates more swapper/0 kernel idle tasks with pid/tid ==
0. Filter these task_newtask events since they do not create real new
threads.

Bug: 379009092
Change-Id: I556e085e35ca622fcfee7a3b5122f853eead05ea