tree af2a5650cfb0525470bec46635785cfaa31c7f0f
parent 57b75dc6107012b32df59d065bd0a985ea03c2ec
author Connor O'Brien <connoro@google.com> 1559950789 -0700
committer Steven Moreland <smoreland@google.com> 1578959884 -0800

libtimeinstate: change map format to improve performance

By storing times for up to 32 freqs in each map value instead of one
time per value, we can drastically reduce the number of syscalls
required to get the data for a single UID and for all UIDs. This
translates into a better than 3x speedup in getUidsCpuFreqTimes().

Test: libtimeinstate_test passes
Bug: 138317993
Change-Id: I0d2d4d5fc99a82179a84a9aa83101bc55ddbc0e4
Signed-off-by: Connor O'Brien <connoro@google.com>
(cherry picked from commit 16ab1709fc9bef67fc1655128f54a6bce182de50)
Merged-In: I0d2d4d5fc99a82179a84a9aa83101bc55ddbc0e4