Sears Russell
e087c9c073
add alternative implementation of min aggregate for small sets. It avoids red black overheads, but some operations are linear in the number of values considered by the aggregate
2011-04-18 20:04:33 +00:00
Sears Russell
304b439217
new data structures: min aggregate and concurrent ringbuffer
2011-04-14 23:03:20 +00:00
Sears Russell
e1201970b6
add firstPendingEntry call to log API, use finer grained latches in Tupdate().
2011-04-01 17:25:46 +00:00
Sears Russell
de8bf53e98
fix some header #include problems
2011-02-22 19:12:38 +00:00
Sears Russell
fb5791e7e4
one line fix to concurrentHashTable, plus documentation and improved unit tests.
2011-02-15 02:57:19 +00:00
Sears Russell
14d8cebdcc
dbug stuff. for now, you have to edit cmakelists.txt to set the location of dbug.
2011-02-14 22:09:57 +00:00
Sears Russell
afc9991156
dbug mode for buffer manager - run with two threads, and a handful of ops/thread
2011-02-07 23:53:20 +00:00
Sears Russell
a4a72b601e
short circuit no-op aborted transactions; add unit test for no-op commits and aborts
2011-01-05 19:10:57 +00:00
Sears Russell
0a461faa04
add "raid1" a simple mirroring I/O handle implementation
2010-12-03 03:51:24 +00:00
Sears Russell
2105337d7f
disable tests of dead code that are known to fail
2010-10-19 21:05:54 +00:00
Sears Russell
4a5d14f2c6
more non_blocking fixes. now the unit test passes
2010-09-23 19:52:54 +00:00
Sears Russell
bb904e85cf
add latch-free slotted pages, and a bug-fix in page.c
2010-09-17 01:10:42 +00:00
Sears Russell
00e474e3fe
Fix bug in LinearHashNTA: inserting over an old key, then aborting set deleted the old key instead of restoring it to its original value
2010-09-01 04:01:20 +00:00
Sears Russell
e5528ce218
relaxed page latching requirements; page.c, and dirtyPageTable no longer check / rely on holding rwlatch; removed (now) unnecessary latching from unit tests
2010-08-06 00:19:19 +00:00
Sears Russell
7a27e39e5b
MAX_BUFFER_SIZE is now a runtime (pre-tinit) option; clean up some doxygen warnings
2010-07-16 16:52:08 +00:00
Sears Russell
2d645beb42
cleaned up multipage operations a bit; added stasis_segments_enabled flag
2010-05-11 22:01:37 +00:00
Sears Russell
07df7c064a
add support for multi-page operations
2010-05-11 00:17:07 +00:00
Sears Russell
04de939e42
fix null pointer derefence in lruFast.c; add unit tests to check for this bug
2010-04-21 21:34:00 +00:00
Sears Russell
c7fa929e71
This fixes in Stasis issue 22.
...
Replacement policies now track the pin count of each page that they interact with. This behavior used to live in bufferHash, and had never been ported to concurrentBufferManager.
For various reasons, the pin counts have to be updated atomically with the LRU state. This would be very difficult to do inside of concurrentBufferManager, which sometimes needs to add and remove pages to replacement policies without holding any other latches.
2010-04-20 01:09:32 +00:00
Sears Russell
5138af6d1c
leave 2 pages in reserve for stale pin test (as opposed to one)
2010-04-19 23:09:30 +00:00
Sears Russell
7c5eb2a7e9
added dup method to io handles
2010-04-08 23:50:01 +00:00
Sears Russell
d281282533
fix concurrentWrapper so that it implements the same api as the other replacement policies (it used to livelock when no pages were available. It now returns null).
2010-03-31 22:37:42 +00:00
Sears Russell
3c27ed566e
add prefetch primitives
2010-03-29 22:29:30 +00:00
Sears Russell
5ffd1110e9
Added concept of "transaction fingerprints"
...
The region allocator marks freed regions "Condemned" before actually freeing them. Condemned regions are associated
with a transaction; before they can be reused / coalesced the transaction that condemned them must complete.
The region allocator used "TisActiveTransaction(xid)" to determine whether a given transaction had completed. The
problem is that Stasis now reuses transaction id's, and condemned regions were never reclaimed in practice. A transaction
fingerprint is a unique identifier (currently transaction id, rec_lsn) that can be used to distinguish transactions that
did not execute concurrently.
I considered an alternative design based upon end-of-transaction actions. This would have worked as well, but would
have been a more invasive change.
2010-02-18 19:12:46 +00:00
Sears Russell
4e100479d1
Add TarrayListDealloc() to arrayList. Remove one region allocation from each array list alloc. Add unit test for dealloc.
...
Also, removed some old compensations cruft.
2010-02-18 04:12:39 +00:00
Sears Russell
98e0cb1fab
implement TregionSize(), add TregionForce()
2010-02-12 16:44:28 +00:00
Sears Russell
180fb12859
unit test for bug 22
2010-02-11 22:19:03 +00:00
Sears Russell
903728c589
shorten dirtyPageTable test.
2010-01-22 23:39:42 +00:00
Sears Russell
3849b5f131
silence compiler warnings
2010-01-22 19:09:58 +00:00
Sears Russell
49979ffa52
unit test for libredblack
2010-01-21 23:48:43 +00:00
Sears Russell
17ac09c652
fix deadlock in check_multiplexer.
2010-01-21 21:53:18 +00:00
Sears Russell
9dba8770f0
test TsoftCommit(); make sure it works when TforceCommits() is called, and when Tdeinit() is called
2010-01-21 18:57:58 +00:00
Sears Russell
9f0886a565
fix typo that disabled the new tests
2010-01-21 18:40:28 +00:00
Sears Russell
f2ee7b6573
fix bug exposed by new group commit behavior; nextUnstableLSN was returning the offset of the beginning of the CRC entry, not the end of it. This was causing an assertion to fail.
2010-01-21 18:28:34 +00:00
Sears Russell
250223086c
reordered includes for compatibility with gcc3
2010-01-21 00:03:17 +00:00
Sears Russell
b1f7d1947a
more log refactoring. safeWrites now holds a latch across reserve_entry, write_entry, and write_entry_done
2010-01-19 02:14:09 +00:00
Sears Russell
022136d3c3
move inMemoryLog, to the new api
2010-01-11 22:55:55 +00:00
Sears Russell
d71e248291
removed freeLogEntry
2010-01-11 20:41:59 +00:00
Sears Russell
f3d06543e5
silence spammy debugging messages; clean up check_io test case implementation a bit
2010-01-06 23:44:07 +00:00
Sears Russell
1af589dd18
remove malloc and memcpy from the in_memory_log read path
2009-12-31 23:25:56 +00:00
Sears Russell
1409a9eb27
more refactoring; log handles now manage their log entries memory
2009-12-31 23:01:37 +00:00
Sears Russell
a5788688c8
refactor getUpdateArgs; remove a bunch of casts, fix a bunch of warnings
2009-12-31 20:20:47 +00:00
Sears Russell
9aa1d9d652
pull memcpy out of allocUpdateEntry()
2009-12-31 19:30:40 +00:00
Sears Russell
2ff421bff0
initial opensolaris port
2009-11-29 03:22:36 +00:00
Sears Russell
675bdce24a
wrote some wrappers that emulate redblack; default to stl tree for now
2009-11-24 00:24:18 +00:00
Sears Russell
07053987ef
speed up test a bit
2009-11-09 22:58:55 +00:00
Sears Russell
8bd0616f97
new concurrent buffer manager
2009-11-09 19:50:00 +00:00
Sears Russell
f5e3ab2d91
concurrent hashtable seems to be working; still need to work out atomicity primitives (eg; options to leave the bucket locked on success)
2009-10-19 21:55:25 +00:00
Sears Russell
1cf16f62f2
add optional support for gcc atomics to transaction table
2009-10-15 22:46:25 +00:00
Sears Russell
5df5512d91
fixed unit test bug; logWriters may now return NULL when readers attempt to read before the beginning of the log
2009-10-15 18:48:58 +00:00
