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Enhancement
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Resolution: Fixed
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P3
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7
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b124
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generic
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generic
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Not verified
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-2205874 | 6u25 | Y. Ramakrishna | P3 | Closed | Fixed | b01 |
| JDK-2204432 | hs20 | Y. Ramakrishna | P3 | Resolved | Fixed | b05 |
It appears that scavenges in a configuration where CMS is the
old generation may be unnecessarily saving/restoring more
header words than necessary. The code came in explicitly
with Biased Locking and was intended to work around a correctness
issue after the application of a performance patch to reduce
the number of header words saved/restored (presumably in the
presence of promotion failure; see related bugs)
and is somewhat delicate, so due diligence & caution is called for
before making what might appear to be the obvious changes
here as suggested by the customer.
old generation may be unnecessarily saving/restoring more
header words than necessary. The code came in explicitly
with Biased Locking and was intended to work around a correctness
issue after the application of a performance patch to reduce
the number of header words saved/restored (presumably in the
presence of promotion failure; see related bugs)
and is somewhat delicate, so due diligence & caution is called for
before making what might appear to be the obvious changes
here as suggested by the customer.
- backported by
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JDK-2204432 CMS: could save/restore fewer header words during scavenge
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- Resolved
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- Closed
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- relates to
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- Closed
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