tree 9bf51c6e7b21280bbc5424d789ba2503a93feacc
parent 64284745bb8d31195e1861ce0e1b18fba3603ed9
author Minchan Kim <minchan@google.com> 1667846589 -0800
committer Minchan Kim <minchan@google.com> 1668188679 -0800

MM: dump pixel trace at bugreport

Create pixel speicifc trace buffer and enable CMA trace events.
At bugreport, dumpstate will dump the trace buffer into
dumpstate_board.txt

   binder:3947_2-3963    [003] ....    29.954681: cma_alloc_start: name=vframe count=16 align=4
   binder:3947_2-3963    [003] ....    29.956230: cma_alloc_finish: name=vframe pfn=946080 page=000000003d6b380b count=16 align=4
   binder:3947_2-3963    [003] ....    29.956235: cma_alloc_info: name=vframe pfn=0x946080 count=16 align=4 nr_migrated=16 nr_reclaimed=0 nr_mapped=16 err_iso=0 err_mig=0 err_test=0
   binder:3947_2-3963    [003] ....    29.988325: cma_release: name=vframe pfn=946080 page=000000003d6b380b count=16

It's useful to investigate CMA allocation problems.

Test: "adb bugreport" includes the trace dump in dumpstate_board.txt
Bug: 238728493
Change-Id: I5eb2f79152d32ff7dbb4b9a7ea679facb186aa00
Signed-off-by: Minchan Kim <minchan@google.com>