Mercurial > hg > graal-compiler
comparison src/share/vm/runtime/thread.cpp @ 1166:7b0e9cba0307
6896647: card marks can be deferred too long
Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future.
Reviewed-by: never, johnc
| author | ysr |
|---|---|
| date | Wed, 13 Jan 2010 15:26:39 -0800 |
| parents | 9b9c1ee9b3f6 |
| children | 6deeaebad47a |
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| 1165:2dd52dea6d28 | 1166:7b0e9cba0307 |
|---|---|
| 2355 } | 2355 } |
| 2356 } | 2356 } |
| 2357 }; | 2357 }; |
| 2358 | 2358 |
| 2359 void JavaThread::oops_do(OopClosure* f, CodeBlobClosure* cf) { | 2359 void JavaThread::oops_do(OopClosure* f, CodeBlobClosure* cf) { |
| 2360 // Flush deferred store-barriers, if any, associated with | 2360 // Verify that the deferred card marks have been flushed. |
| 2361 // initializing stores done by this JavaThread in the current epoch. | 2361 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); |
| 2362 Universe::heap()->flush_deferred_store_barrier(this); | |
| 2363 | 2362 |
| 2364 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do | 2363 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
| 2365 // since there may be more than one thread using each ThreadProfiler. | 2364 // since there may be more than one thread using each ThreadProfiler. |
| 2366 | 2365 |
| 2367 // Traverse the GCHandles | 2366 // Traverse the GCHandles |