Sears Russell
4fe5bcaa72
Refactored doubleLinkedList and lruFast. The linked list API is now less insane, and lruFast is simpler. Added asserts to detect double insertion of nodes into the lists / lru
2010-09-24 17:56:51 +00:00
Sears Russell
7815d2f792
add assert to sequential-optimized write path
2010-09-24 17:51:09 +00:00
Sears Russell
a3e7fc0fe2
add hint: stasis_buffer_manager_hint_writes_are_sequential. if set to 1, then only one thread will write back at a time, which leads to greatly improved sequential write throughput
2010-09-23 23:09:43 +00:00
Sears Russell
9a46882ae3
port to new rbtree implementation (still buggy); performance tweaks for sequential throughput (this commit only changes non_blocking which is disabled by default, and in all sane runtime configurations)
2010-09-23 22:51:13 +00:00
Sears Russell
cb31593d1f
fix typo in disabled code
2010-09-23 22:48:06 +00:00
Sears Russell
58c909a2ea
add implementations of some more rblookup flags to the stl red black tree adapter
2010-09-23 20:38:50 +00:00
Sears Russell
4a5d14f2c6
more non_blocking fixes. now the unit test passes
2010-09-23 19:52:54 +00:00
Sears Russell
774ccfb002
whitespace and comment cleanup
2010-09-23 18:24:03 +00:00
Sears Russell
d3c8c1c003
remove overly-aggressive asserts from last checkin
2010-09-23 00:31:37 +00:00
Sears Russell
546bb4c767
fix rare latch corruption in concurrentBufferManager; add some asserts
2010-09-23 00:21:04 +00:00
Sears Russell
62e7663c27
fix + use macro
2010-09-23 00:19:34 +00:00
Sears Russell
aa8142d708
remove apparent race in concurrentHash.c
2010-09-17 01:38:40 +00:00
Sears Russell
889311a303
un-rollback -r1403. It was not the source of the assert failure.
2010-09-17 01:16:46 +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
e6067ae60b
rollback -r1403, which was leading to tmp == p->TLS assertion failures
2010-09-02 17:59:00 +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
c2cb334506
add comment to explain mysterious policy in concurrentWrapper
2010-08-25 16:37:05 +00:00
Sears Russell
9b0ee8e856
get rid of deadlock in concurrentBufferManager writeBackPage. The deadlock was due to concurrent reads in higher level code
2010-08-19 23:16:02 +00:00
Sears Russell
52055aa20f
whitespace cleanup
2010-08-19 17:48:39 +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
0c37a4bccc
fix performance-degrading typo
2010-07-26 23:56:05 +00:00
Sears Russell
ad0fe63c2e
implement writeBackPage for bufferHash.c
2010-07-26 23:55:43 +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
e2ba421a53
cleaned up buffer manager comments, added some asserts
2010-07-13 18:17:25 +00:00
Sears Russell
ee7aaff9ec
add writeback starvation avoidance logic to concurrentBufferManager
2010-07-09 01:55:54 +00:00
Sears Russell
f376d46090
pull multiops outside of the log latch. (how embarassing...)
2010-06-15 23:12:38 +00:00
Sears Russell
97a2fdd600
fix null pointer dereference when recovering loser transaction that makes use of multipage operations
2010-05-19 01:22:40 +00:00
Sears Russell
71292538e8
Amortize bucket initialization costs for linear hash tables. The best case improvement (~ 20%) is seen with hashes with fixed length key/value pairs and insert-only workloads
2010-05-12 17:51:20 +00:00
Sears Russell
dc1f799a37
TarrayListAlloc() and TarrayListExtend() now generate O(1) bytes of log entries; they use the new multipage operation type.
2010-05-11 23:34:13 +00:00
Sears Russell
820f706faf
TarrayListExtend now zeros out the contents of the newly allocated records (this is implemented by having fixed.c zero out the records)
2010-05-11 23:27:22 +00:00
Sears Russell
75ae7103fc
fix crash in recovery redo that was caused by multipage operations
2010-05-11 23:17:09 +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
ffa4f18283
add tryToWriteBackPage. concurrentBufferManager is now compatible with FORCE mode transactions.
2010-04-28 00:05:00 +00:00
Sears Russell
ee6d0768d3
Fix failing assert by replacing trywritelock with writelock in concurrentBufferManager. Revision -r1380 relaxed an invariant, causing the trylock to sometimes contend with other threads
2010-04-26 04:07:38 +00:00
Sears Russell
74803d354e
fix latch ordering in concurrent buffer manager. It no longer does a lock(p->loadlatch) while holding a hashtable bucket latch. Instead, it trylocks, then compensates for in progress changes if the latch fails.
2010-04-23 23:51:12 +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
87ba38adb7
fix compilation when CONCURRENT_LRU is defined; make it the default (since it is only used by concurrentBufferManager)
2010-04-20 03:56:47 +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
887832582c
expose stasis_handle_t up through the buffer manager; add sequential I/O hinting; fix stupid busy-wait in prefetch
2010-04-12 20:54:10 +00:00
Sears Russell
7c5eb2a7e9
added dup method to io handles
2010-04-08 23:50:01 +00:00
Sears Russell
ff2f2e9e1e
add TregionPrefetch()
2010-03-31 22:41:33 +00:00
Sears Russell
358f037441
fix concurrency bug that cropped up when the concurrent buffer manager was used with the concurrent wrapper replacement policy. Concurrent wrapper hashes on pageid, but the buffer manager was changing the pageid out from under it
2010-03-31 22:39:07 +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
e17e948697
add missing return statement
2010-03-29 22:29:14 +00:00
Sears Russell
6deb34f5b2
fix handling of loadPageForOperation during recovery; initialize rid.size in slottedLast
2010-03-22 19:56:55 +00:00
Sears Russell
85abeb9d77
Fix ArrayList regressions
2010-02-18 19:50:06 +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
6454d55a42
fix bug in loadUninitializedPage(). It was passing INVALID_XID into the transaction table, which is not allowed
2010-02-18 19:04:39 +00:00
