libbpf-tools/offcputime: Add multi process/thread support #5111
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This is a test example.
# ./offcputime -p 16,48
Tracing off-CPU time (us) of PID [16, 48]... Hit Ctrl-C to end.
bpf_prog_a42aae11c0bc18f2_sched_switch
bpf_prog_a42aae11c0bc18f2_sched_switch
bpf_trace_run4
__traceiter_sched_switch
__schedule
schedule
worker_thread
kthread
ret_from_fork
ret_from_fork_asm
- kworker/2:1 (48)
3353019
bpf_prog_a42aae11c0bc18f2_sched_switch
bpf_prog_a42aae11c0bc18f2_sched_switch
bpf_trace_run4
__traceiter_sched_switch
__schedule
schedule
rcu_gp_kthread
kthread
ret_from_fork
ret_from_fork_asm
- rcu_preempt (16)
1720974
ekyooo
requested review from
drzaeus77,
goldshtn,
yonghong-song,
4ast,
brendangregg and
davemarchevsky
as code owners
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This is a test example.