ASSEMBLY_EXCEPTION

Tue, 04 Aug 2009 16:00:17 -0700

author
johnc
date
Tue, 04 Aug 2009 16:00:17 -0700
changeset 1325
6cb8e9df7174
parent 435
a61af66fc99e
child 1907
c18cbe5936b8
permissions
-rw-r--r--

6819077: G1: first GC thread coming late into the GC.
Summary: The first worker thread is delayed when entering the GC because it clears the card count table that is used in identifying hot cards. Replace the card count table with a dynamically sized evicting hash table that includes an epoch based counter.
Reviewed-by: iveresov, tonyp

     2 OPENJDK ASSEMBLY EXCEPTION
     4 The OpenJDK source code made available by Sun at openjdk.java.net and
     5 openjdk.dev.java.net ("OpenJDK Code") is distributed under the terms of the
     6 GNU General Public License <http://www.gnu.org/copyleft/gpl.html> version 2
     7 only ("GPL2"), with the following clarification and special exception.
     9     Linking this OpenJDK Code statically or dynamically with other code
    10     is making a combined work based on this library.  Thus, the terms
    11     and conditions of GPL2 cover the whole combination.
    13     As a special exception, Sun gives you permission to link this
    14     OpenJDK Code with certain code licensed by Sun as indicated at
    15     http://openjdk.java.net/legal/exception-modules-2007-05-08.html
    16     ("Designated Exception Modules") to produce an executable,
    17     regardless of the license terms of the Designated Exception Modules,
    18     and to copy and distribute the resulting executable under GPL2,
    19     provided that the Designated Exception Modules continue to be
    20     governed by the licenses under which they were offered by Sun.
    22 As such, it allows licensees and sublicensees of Sun's GPL2 OpenJDK Code to
    23 build an executable that includes those portions of necessary code that Sun
    24 could not provide under GPL2 (or that Sun has provided under GPL2 with the
    25 Classpath exception).  If you modify or add to the OpenJDK code, that new
    26 GPL2 code may still be combined with Designated Exception Modules if the
    27 new code is made subject to this exception by its copyright holder.

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