56fe25895e91d34a0a017429468829a20bdd5ae4 - LeafOS-Project/android_art

commit	56fe25895e91d34a0a017429468829a20bdd5ae4	[log] [tgz]
author	Mathieu Chartier <mathieuc@google.com>	Thu Jul 14 13:30:03 2016 -0700
committer	Mathieu Chartier <mathieuc@google.com>	Wed Jul 20 18:05:30 2016 -0700
tree	b000aa1b4a54360db45436a9df872b034e36d79f
parent	dc4f4d42aa1712a7ac2e4c24c0aebe58b71ae2c0 [diff]

Add a way to measure read barrier slow paths

If enabled, this option counts number of slow paths, measures the
total slow path time per GC and records the info into a histogram.
Also added support for systrace to see which threads are performing
slow paths.

Added runtime option -Xgc:measure to enable. The info is dumped
for SIGQUIT.

Test: Volantis boot with CC, test-art-host with CC, run EEAC with CC
and -Xgc:measure

Bug: 30162165

Change-Id: I3c2bdb4156065249c45695f13c77c0579bc8e57a

cmdline/cmdline_types.h[diff]
runtime/gc/collector/concurrent_copying-inl.h[diff]
runtime/gc/collector/concurrent_copying.cc[diff]
runtime/gc/collector/concurrent_copying.h[diff]
runtime/gc/collector/garbage_collector.h[diff]
runtime/gc/heap.cc[diff]
runtime/gc/heap.h[diff]
runtime/read_barrier-inl.h[diff]
runtime/runtime.cc[diff]

9 files changed

tree: b000aa1b4a54360db45436a9df872b034e36d79f