Loading...

XML

Word

Printable

Type: Bug
Resolution: Fixed
Priority: P2
Fix Version/s: hs25
Affects Version/s: hs25
Component/s: hotspot
Labels:
- noreg-hard
- sqe-8-noreglabel-backlog-startfresh

Subcomponent:
runtime
Introduced In Build:
b01
Introduced In Version:

hs25
Resolved In Build:
b07
CPU:

generic
OS:

generic
Verification:
Not verified

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8002013	8	Zhengyu Gu	P2	Closed	Fixed	b63
JDK-8017836	7u45	Zhengyu Gu	P2	Closed	Fixed	b01
JDK-8003289	7u40	Zhengyu Gu	P2	Closed	Fixed	b04
JDK-8003870	hs24	Zhengyu Gu	P2	Closed	Fixed	master

After NPG changes, NMT sees different memory usage patterns, which it cannot deal with correctly. For example, it reserves a bigger range, then it re-reserve a smaller range within the bigger range. NMT does not expect and cannot deal with overlapped reserved range.

There is an example:

[fffffd7ffb800000 - fffffd7ffbe00000] [9] seq = 337 <== reserve a bigger range
[fffffd7ffb800000 - fffffd7ffbe00000] [9] seq = 338 <== dup record
[fffffd7ffb800000 - fffffd7ffb800000] [10b] seq = 339 <== mtClass
[fffffd7ffb800000 - fffffd7ffba00000] [9] seq = 340 <== re-reserve a smaller range
[fffffd7ffb800000 - fffffd7ffba00000] [a] seq = 341 <== commit
[fffffd7ffb800000 - fffffd7ffba00000] [a] seq = 342 <== dup record

backported by

JDK-8002013 NMT: NMT needs to deal overlapped virtual memory ranges

Closed

JDK-8003289 NMT: NMT needs to deal overlapped virtual memory ranges

Closed

JDK-8003870 NMT: NMT needs to deal overlapped virtual memory ranges

Closed

JDK-8017836 NMT: NMT needs to deal overlapped virtual memory ranges

Closed

duplicates

JDK-7198283 NMT: fault binary search code causes infinite loop

Closed

JDK-7197966 NMT: die code cleanup

Closed

relates to

JDK-8003487 NMT: incorrect assertion in VMMemPointerIterator::remove_released_region method (memSnapshot.cpp)

Closed

JDK-7188475 NMT ON: SIGSEGV in MemSnapshot::promote()

Closed

JDK-7198283 NMT: fault binary search code causes infinite loop

Closed

(1 duplicates, 3 relates to)

Assignee:: Zhengyu Gu

Reporter:: Zhengyu Gu

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Created:: 2012-09-17 17:36

Updated:: 2013-07-02 12:46

Resolved:: 2012-10-19 22:44

Imported:: 26/Sep/12 3:58 PM

Indexed:: 26/Sep/12 9:00 AM

Details

Backports

Description

Attachments

Issue Links

Activity

People

Dates