commit 0983543d926e070fc1332926fa98c5c5bdee7685
author Yabin Cui <yabinc@google.com> Tue Oct 17 10:21:55 2023 -0700
committer Yabin Cui <yabinc@google.com> Tue Oct 17 13:24:29 2023 -0700
tree ef484dcb5bf08929573bd68f52355764f5680852
parent 8e517cc8d1339d1c16a8ee0fda573a69f015ea19

Reapply "simpleperf: refactor code setting sample rate"

This reverts commit 3a2eacfe5bfe3f15dbd17b7e24a8edc9e4c2ed34.

Also fix a bug in the original CL:
When --trace-offcpu is used, using SetSampleRateForNewEvents()
to set sample rate for sched_switch event can affect other
events. So add AddEventType(event_name, sample_rate) to add
sched_switch event and set its sample rate at the same time.

Bug: 304600718
Test: run simpleperf_unit_test
Change-Id: If5b361ff5412086858e9f0a11ef2f55e7a39c485