Reuse arena memory for each block in scheduler.
This reduces the peak memory used for large methods with
multiple blocks to schedule.
Compiling the aosp_taimen-userdebug boot image, the most
memory hungry method BatteryStats.dumpLocked has the
Scheduler memory allocations in ArenaStack hidden by the
register allocator:
- before:
MEM: used: 8300224, allocated: 9175040, lost: 197360
Scheduler 8300224
- after:
MEM: used: 5914296, allocated: 7864320, lost: 78200
SsaLiveness 5532840
RegAllocator 144968
RegAllocVldt 236488
The total arena memory used, including the ArenaAllocator
not listed above, goes from 44333648 to 41950324 (-5.4%).
(Measured with kArenaAllocatorCountAllocations=true,
kArenaAllocatorPreciseTracking=false.)
Also remove one unnecessary -Wframe-larger-than= workaround
and add one workaround for large frame with the above arena
alloc tracking flags.
Test: m test-art-host-gtest
Test: testrunner.py --host
Bug: 34053922
Change-Id: I7fd8d90dcc13b184b1e5bd0bcac072388710a129
8 files changed