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1169 commits

Author SHA1 Message Date
Richard Brooksby
4ce753ec45 Abstracting partially mapped page tables into a sparsearray abstract datatype, removing a great deal of complexity from the vm arena, and some unnecessary double-initialisation and scanning loops during allocation. 
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 Change: 184333
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 2014-02-12 17:32:20 +00:00
Richard Brooksby
b4c03d0ef1 Clarifying how the beginning of the page table gets unmapped. 
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 Change: 184332
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 2014-02-12 15:06:04 +00:00
Richard Brooksby
0833d101a0 Responding to review comments. see <https://info.ravenbrook.com/mail/2014/02/12/11-30-00/0/>. 
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 Change: 184331
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 2014-02-12 11:31:00 +00:00
Richard Brooksby
763c6af2bc Purging half of the spare memory, rather than just enough to get under the limit, so that there aren’t many small unmaps, and many scans for spare pages. 
Copied from Perforce
 Change: 184326
 ServerID: perforce.ravenbrook.com
 2014-02-11 18:26:00 +00:00
Richard Brooksby
d3f9686d30 Fixing boundary cases for unmapping page table pages when there aren’t a nice whole number of descriptors on each page. 
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 Change: 184325
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 2014-02-11 17:18:21 +00:00
Richard Brooksby
3077840ff8 Adding a cache of free pages per zone to the arena, so that we recycle single pages fast, especially after each reclaim. 
Copied from Perforce
 Change: 184324
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 2014-02-11 15:23:32 +00:00
Richard Brooksby
2b5e126c48 Further tidying up of the page descriptor and naming. 
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 Change: 184323
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 2014-02-11 14:14:16 +00:00
Richard Brooksby
40e4e93dec Encoding the page state in the bottom two bits of the first field, rather than using up a whole word, in order to make room for a free list pointer. 
Copied from Perforce
 Change: 184322
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 2014-02-11 13:41:57 +00:00
Richard Brooksby
4329661aca Improving commentary on page table unmapping code in response to review. see <https://info.ravenbrook.com/mail/2014/01/31/17-26-12/0/>. 
Copied from Perforce
 Change: 184291
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 2014-02-04 16:56:36 +00:00
Richard Brooksby
d206bd35b9 Changes from review comments made in <https://info.ravenbrook.com/mail/2014/01/31/13-40-25/0/>. 
ArenaSpareCommitExceeded changed to ArenaPurgeSpare so that the arena can properly reduce the amount of spare memory when setting the commit limit etc.
pagesMarkAllocated promptly unmaps page table pages in its error path.
Miscellaneous clarifications and extra checking.

Copied from Perforce
 Change: 184267
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 2014-01-31 15:21:21 +00:00
Richard Brooksby
e5f2846a2d Keeping a single ring of spare chunks in the vm arena, in lru order, so that spare pages are unmapped closer to lru. 
Copied from Perforce
 Change: 184251
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 2014-01-31 09:36:42 +00:00
Richard Brooksby
8861cdcb2b Using a more robust page table unmapping method that catches pages previously left mapped in the error page of pagesmarkallocated. 
Test run passes.

Copied from Perforce
 Change: 184250
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 2014-01-31 02:05:11 +00:00
Richard Brooksby
b937a0b8fc Attempting to correct the unmapping of the page table. still doesn’t quite work. 
Copied from Perforce
 Change: 184249
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 2014-01-31 00:03:32 +00:00
Richard Brooksby
ecc0ab3dfe Abolishing the spare pages bit table. 
Not quite working yet. This code fails to unmap unused page table pages, and so triggers an assertion at chunk finish.

Copied from Perforce
 Change: 184246
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 2014-01-30 19:58:36 +00:00
Richard Brooksby
9c70f44c70 Adding spare pages to a ring within each chunk, so that they can be found without a bit table scan. 
Spare pages are returned to the OS using the ring in roughly LRU order.
Only enough spare pages are returned to maintain hysteresis, rather than all of them.
Nearly ready to strip out the noSparePages bit table.

Copied from Perforce
 Change: 184245
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 2014-01-30 19:58:36 +00:00
Richard Brooksby
9e197b6a79 Fix broken hysteresis in tract mapping. only purge spare pages if it’s possible to free a chunk, rather than speculatively every reclaim. see <https://info.ravenbrook.com/mail/2014/01/25/17-37-52/0/>. 
Copied from Perforce
 Change: 184125
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 2014-01-25 18:00:51 +00:00
Richard Brooksby
f906187add iterating over segments using the pool and segment rings, rather than scanning the tract table, which may be full of irrelevant tracts, especially when non-gc pools are large. see <https://info.ravenbrook.com/mail/2014/01/25/12-16-09/0/>. 
Copied from Perforce
 Change: 184120
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 2014-01-25 15:33:10 +00:00
Richard Brooksby
76b66a7083 Adding a rash configuration to xcode builds. 
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 Change: 184117
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 2014-01-25 15:25:52 +00:00
Richard Brooksby
6e8d189002 Ignoring a.out (default output from cc). 
Copied from Perforce
 Change: 184116
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 2014-01-25 15:24:28 +00:00
Richard Brooksby
728ea5e066 Inclusion order mysteriously prevents profiling under xcode. 
Copied from Perforce
 Change: 184111
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 2014-01-24 16:00:49 +00:00
Richard Brooksby
8086cc7cad Merging the "dj" benchmark from the benchmarking development branch. 
Copied from Perforce
 Change: 184106
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 2014-01-24 15:29:28 +00:00
Richard Brooksby
e37946b6f9 Catch-up merge from master. 
Copied from Perforce
 Change: 184103
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 2014-01-24 14:22:27 +00:00
Gareth Rees
f1c066dab4 Remove obsolete file osxc.h. 
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 Change: 183954
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 2014-01-12 21:57:54 +00:00
Gareth Rees
158e4ea974 Test case libcbt.c is obsolete: mpslibcb mechanism was removed in change 179279. 
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 Change: 183952
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 2014-01-12 21:29:53 +00:00
Gareth Rees
b8f0a9195c Clarify decision to preserve/reclaim in amcreclaimnailed, avoiding ternary operator inside the if condition. 
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 Change: 183948
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 2014-01-12 11:21:21 +00:00
Gareth Rees
75e5c45a53 Remove unused (and unusable) macros arenarootring() and arenatracering(). 
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 Change: 183947
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 2014-01-12 11:19:35 +00:00
Gareth Rees
7a2a16aa73 Ignore build products for new platform lii6ll. 
Ignore telemetry database mpiso*.sql.

Copied from Perforce
 Change: 183942
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 2014-01-11 21:37:19 +00:00
Gareth Rees
e184ad8938 Rename spi3.c to spw3i3mv.c as it is windows- and microsoft- specific. 
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 Change: 183939
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 2014-01-10 20:51:13 +00:00
Gareth Rees
902c10954b Merge branch/2013-05-17/emergency into the master sources. 
This change refactors MVTBufferFill and makes related improvements to improve the clarity of the code.

Copied from Perforce
 Change: 183935
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 2014-01-10 18:52:08 +00:00
Gareth Rees
ff2ff70345 Change result type of abqpush, abqpop and abqpeek to bool. 
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 Change: 183934
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 2014-01-10 18:44:46 +00:00
Gareth Rees
1049386b6f Make improvements (mostly to comments) based on reviews: 
https://info.ravenbrook.com/mail/2014/01/10/15-57-50/0/
https://info.ravenbrook.com/mail/2014/01/10/15-40-47/0/

Copied from Perforce
 Change: 183932
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 2014-01-10 18:18:06 +00:00
Gareth Rees
bcfad58d3c Merge custom cet mainline into the master sources. this includes fixes for job003519 (clock values in text telemetry logs on windows have top 32 bits zero), job003536 (cet office can't replicate 100k snowmen in reasonable time), job003651 (stack overflows are not reliably handled). 
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 Change: 183926
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 2014-01-10 14:16:08 +00:00
Gareth Rees
ba3aaeb575 Clarify comment above bufferisreset: by "all pointers into the region" it actually means "the base, init, alloc, and limit pointers". 
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 Change: 183637
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 2013-11-04 15:31:58 +00:00
Gareth Rees
e82e3c4a21 Improve documentation of thread- and exception-safety precautions. 
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 Change: 183635
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 2013-11-04 15:14:47 +00:00
Gareth Rees
b45fc17861 Put testsetsize back to its original value of 200, so that randomsizealigned does not invoke undefined behaviour by right-shifting by more than the word width. 
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 Change: 183617
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 2013-10-31 09:39:09 +00:00
Gareth Rees
535f7e6bdc Add comments and assertions to make it clearer how btfindresrange and btfindresrangehigh work. in particular, explain why the possible unsigned integer underflow in btfindresrangehigh is safe. 
Copied from Perforce
 Change: 183613
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 2013-10-30 15:53:19 +00:00
Gareth Rees
d943faa62b Don't call mvtsegfree from mvtfinish: we don't know whether or not there was any fragmented (unavailable) space in this segment, and so we can't keep the accounting correct. add assertion in mvtsegfree that detects incorrect accounting. 
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 Change: 183610
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 2013-10-30 13:15:09 +00:00
Gareth Rees
c59ff51131 The next release of the mps will be 1.112.0, so update version.c. 
Update the version creating procedure: version.c is now the only file containing the release number.

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 Change: 183548
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 2013-10-10 14:29:31 +01:00
Gareth Rees
5b19a26400 Improve wording of comment. 
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 Change: 183526
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 2013-10-04 11:50:19 +01:00
Gareth Rees
1289bde3ed Fix broken mps_key_pool_debug_options keyword argument. 
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 Change: 183524
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 2013-10-04 11:05:56 +01:00
Gareth Rees
6971ab5691 Document that you can specify mps_key_rank when creating an allocation point on an ams pool. make mps_key_rank default to mps_rank_exact(). 
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 Change: 183515
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 2013-10-02 15:44:34 +01:00
Gareth Rees
b5004beb4b Make keyword mps_key_ams_support_ambiguous optional, with default value false. update documentation accordingly. 
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 Change: 183513
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 2013-10-02 15:14:57 +01:00
Gareth Rees
7b16ae5a45 Use macro nonnegative so that we can keep asserting that values are >= 0 without provoking "unsigned comparison >= 0 is always true" warnings from gcc. 
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 Change: 183505
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 2013-10-01 14:27:52 +01:00
Gareth Rees
bb857594bd Merge branch/2013-08-21/lii6ll/... into the master sources, adding new supported platform lii6ll (linux, x86-64, clang/llvm). 
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 Change: 183503
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 2013-10-01 14:04:36 +01:00
Gareth Rees
68f5280528 Avoid comparison of unsigned >= 0 so that we can compile without warnings under gcc -wextra. 
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 Change: 183501
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 2013-10-01 11:10:59 +01:00
Gareth Rees
73989d332e Raise an error if variety is something other than rash, hot, or cool. 
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 Change: 183499
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 2013-10-01 10:53:09 +01:00
Gareth Rees
4950182f38 Avoid warnings when compiling with -wwrite-strings: 
* Use const char * in places where we want to assign string constants.
Avoid warnings when compiling with -Wextra:
* Avoid if statement with empty body in amcsshe.c
* Avoid comparison of unsigned >= 0.

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 Change: 183498
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 2013-10-01 10:52:45 +01:00
Gareth Rees
1e97a6a193 Turn on -wextra -wwrite-strings when compiling with gcc or clang. 
Add missing initializer to mps_args_none.
Change "char *" to "const char *" where necessary.

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 Change: 183494
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 2013-09-30 17:18:52 +01:00
Gareth Rees
55ef6fce3c New supported platform lii6ll (linux, x86-64, clang/llvm). 
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 Change: 183414
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 2013-09-11 10:27:22 +01:00
Gareth Rees
98306c0095 Make the mps compilable under clang/llvm 3.0 with the -ansi -pedantic options: 
Avoid if with empty body by adding NOOP.
Avoid extended offsetof in expansion of PageOfTract, linkOfMessage, linkOfRing, and Pool2AMST macros.

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 Change: 183413
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 2013-09-11 10:21:12 +01:00