2775ee4f82dff260663ca16adddc0b15327aaa42 |
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21-Aug-2013 |
Mathieu Chartier <mathieuc@google.com> |
Add more runtime options. Changed HeapGCThreads to be split into two different options: -XX:ParallelGCThreads: Which specifies how many threads the GC may use when the mutators are suspended. -XX:ConcGCThreads: Which specifies how many threads the GC may use when the mutators are running. Added runtime options to specify long pause / long GC thresholds: -XX:LongPauseThreshold (default 5ms) -XX:LongGCThreshold (default 100ms) These thresholds were previously constants, but are now runtime options. If we exceed either of the thresholds, we print the GC message. Added a new runtime option: -XX:IgnoreMaxFootprint which makes it that the GC only does GC when the number of bytes allocated hits the growth limit. This causes GC to occur much less frequently and can be useful to measure how much of an impact GC has on performance. Changed the GC behaviour to use only one thread when we do not care about pauses to prevent jank that can be caused by 2 simultaneous GC on different processes fighting for CPU time. Added thread pool functionality for changing the maximum number of active workers. Fixed an accounting error where we didn't count large objects in the total freed. Bug: 9986416 Change-Id: I86afa358d93dcd3780e18ac5d85bdb1a130cb7e7
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720ef7680573c1afd12f99f02eee3045daee5168 |
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17-Aug-2013 |
Mathieu Chartier <mathieuc@google.com> |
Fix non concurrent GC ergonomics. If we dont have concurrent GC enabled, we need to force GC for alloc when we hit the maximum allowed footprint so that our heap doesn't keep growing until it hits the growth limit. Refactored a bit of stuff. Change-Id: I8eceac4ef01e969fd286ebde3a735a09d0a6dfc1
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94c32c5f01c7d44781317bf23933ed0a5bc4b796 |
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09-Aug-2013 |
Mathieu Chartier <mathieuc@google.com> |
More parallel GC, rewritten parallel mark stack processing. Card scanning may now be done in parallel. This speeds up sticky and reduces pause times for all GC types. Speedup on my mako (ritz perf): Average pause time for sticky GC (~250 samples): Without parallel cards scanning enabled: 2.524904215ms Parallel card scanning (num_gc_threads_): 1.552123552ms Throughput (~250 samples): Sticky GC throughput with parallel card scanning: 69MB/s Sticky GC throughput without parallel card scanning: 51MB/s Rewrote the mark stack processing to be LIFO and use a prefetch queue like the non parallel version. Cleaned up some of the logcat printing for the activity manager process state listening. Added unlikely hints to object scanning since arrays and classes are scanned much less often than normal objects. Fixed a bug where the number of GC threads was clamped to 1 due to a bool instead of a size_t. Fixed a race condition when we added references to the reference queues. Sharded the reference queue lock into one lock for each reference type (weak, soft, phatom, finalizer). Changed timing splits to be different for processing gray objects with and without mutators paused since sticky GC does both. Mask out the class bit when visiting fields as an optimization, this is valid since classes are held live by the class linker. Partially completed: Parallel recursive mark + finger. Bug: 10245302 Bug: 9969166 Bug: 9986532 Bug: 9961698 Change-Id: I142d09718c4609b7c2387cb28f517a6983c73288
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0cd7ec2dcd8d7ba30bf3ca420b40dac52849876c |
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18-Jul-2013 |
Brian Carlstrom <bdc@google.com> |
Fix cpplint whitespace/blank_line issues Change-Id: Ice937e95e23dd622c17054551d4ae4cebd0ef8a2
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2ce745c06271d5223d57dbf08117b20d5b60694a |
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18-Jul-2013 |
Brian Carlstrom <bdc@google.com> |
Fix cpplint whitespace/braces issues Change-Id: Ide80939faf8e8690d8842dde8133902ac725ed1a
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7940e44f4517de5e2634a7e07d58d0fb26160513 |
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12-Jul-2013 |
Brian Carlstrom <bdc@google.com> |
Create separate Android.mk for main build targets The runtime, compiler, dex2oat, and oatdump now are in seperate trees to prevent dependency creep. They can now be individually built without rebuilding the rest of the art projects. dalvikvm and jdwpspy were already this way. Builds in the art directory should behave as before, building everything including tests. Change-Id: Ic6b1151e5ed0f823c3dd301afd2b13eb2d8feb81
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