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1246 commits

Author SHA1 Message Date
Gareth Rees
c1ef37731a Refactor the computation of the chunk size into its own function, thus avoiding an "unreachable code" error from clang. 
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 Change: 184482
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 2014-02-24 21:32:22 +00:00
Gareth Rees
09dd8e7027 Avoid use of unreachable code in protcatchthread on os x. 
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 Change: 184478
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 2014-02-24 18:07:14 +00:00
David Lovemore
c34562d0d4 Add pin-leaf option to gcbench. 
Remove default chain from gcbench.

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 Change: 184454
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 2014-02-23 13:44:54 +00:00
Gareth Rees
19fa48cba5 Catch-up merge from master sources to nailboard branch. 
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 Change: 184402
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 2014-02-20 14:48:39 +00:00
Richard Brooksby
005a9d56da Detaching buffers from segments before freeing them in mvt. 
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 Change: 184389
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 2014-02-19 13:58:37 +00:00
Richard Brooksby
2efd201955 Declaring result codes using a relational macro, so that tests can print more meaningful output, and to eliminate redundant code. 
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 Change: 184382
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 2014-02-19 11:55:43 +00:00
Richard Brooksby
d1e7a30752 Removing unused variable discovered by gcc. 
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 Change: 184380
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 2014-02-19 10:55:10 +00:00
Richard Brooksby
121113c697 Fixing up the build on freebsd (fri3gc) 
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 Change: 184356
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 2014-02-17 17:00:08 +00:00
Richard Brooksby
4fc8971802 Minor updates in response to review. see https://info.ravenbrook.com/mail/2014/02/17/16-27-18/0/ 
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 Change: 184354
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 2014-02-17 16:45:12 +00:00
Richard Brooksby
d8cb7e9a01 Catch-up merge from master, mainly to pick up chain-zones merge. 
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 Change: 184343
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 2014-02-14 15:23:36 +00:00
Richard Brooksby
e6ff3a648f Merging branch //info.ravenbrook.com/project/mps/branch/2014-01-29/mps-chain-zones/... into master. 
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 Change: 184342
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 2014-02-14 15:15:07 +00:00
Richard Brooksby
2b0f94df6c Responding to review comments. see <https://info.ravenbrook.com/mail/2014/02/14/14-38-07/0/>. 
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 Change: 184340
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 2014-02-14 15:05:18 +00:00
Richard Brooksby
8679bb210f Catch-up merge from master, mainly to pick up gcbench. 
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 Change: 184335
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 2014-02-12 17:39:31 +00:00
Richard Brooksby
bc47522ae2 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
e0c2c23d00 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
e9f3f70cce 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
e59678ecf9 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. 
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 Change: 184326
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 2014-02-11 18:26:00 +00:00
Richard Brooksby
9e057d1bcc 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
f1d5750639 Adding a cache of free pages per zone to the arena, so that we recycle single pages fast, especially after each reclaim. 
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 Change: 184324
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 2014-02-11 15:23:32 +00:00
Richard Brooksby
9bc635b24d 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
f9e9805b39 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. 
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 Change: 184322
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 2014-02-11 13:41:57 +00:00
David Lovemore
14a09c99a3 Add gcbench, a parameterizable benchmark for gc pools. 
Copied from Perforce
 Change: 184312
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 2014-02-11 11:54:27 +00:00
Richard Brooksby
f8ac78ba0f 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
Gareth Rees
ad5b956475 Bump version and copyright. 
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 Change: 184275
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 2014-01-31 16:41:37 +00:00
Richard Brooksby
8a3dc7c98a Fixing gcc warnings found in https://travis-ci.org/ravenbrook/mps-temporary/jobs/17977403 
Copied from Perforce
 Change: 184271
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 2014-01-31 15:49:14 +00:00
Richard Brooksby
9cec005f66 Fixing awl and lo to actually allocate in the generation requested. 
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 Change: 184269
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 2014-01-31 15:27:51 +00:00
Richard Brooksby
66a05e1f05 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.

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 Change: 184267
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 2014-01-31 15:21:21 +00:00
Richard Brooksby
34f5aece3d Clarifying a comment. 
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 Change: 184262
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 2014-01-31 13:50:16 +00:00
Richard Brooksby
7526f5abe8 Keeping a single ring of spare chunks in the vm arena, in lru order, so that spare pages are unmapped closer to lru. 
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 Change: 184251
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 2014-01-31 09:36:42 +00:00
Richard Brooksby
2b08236430 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
43602ffd58 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
ce329f192e 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
0296f9c04a 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
f0ca8855e3 Converting some ancient “@@@@“ marked items into todo marked actions. 
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 Change: 184261
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 2014-01-30 19:33:14 +00:00
Richard Brooksby
4b50f3688b Adding mps_key_gen generation keyword to pools that take a chain (except amc), so that you can specify which generation to allocate in by default. this allows some flexibility when the client can predict the lifetimes of objects. 
The AWL and LO pools allocate into generation 1 of the arena default chain if neither MPS_KEY_CHAIN or MPS_KEY_GEN is specified, simulating the default setup before the chain-zones branch.

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 Change: 184231
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 2014-01-30 14:27:09 +00:00
Richard Brooksby
17b69133b5 The ams pool no longer requires a chain argument, but defaults to the arena default chain. 
Chains passed to the AMS pool are no longer required to contain a single generation, though the AMS will only use the first generation by default.

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 Change: 184229
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 2014-01-30 13:21:45 +00:00
Richard Brooksby
63f1fcedc2 Converting ams stress test to use keyword arguments. 
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 Change: 184228
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 2014-01-30 13:18:35 +00:00
Richard Brooksby
f30fd7ef84 The chain parameter to amc is now optional, defaulting to the arena’s default chain. 
AWL and LO accept a chain parameter, and also default to the arena’s default chain, rather than creating their own dummy chains.

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 Change: 184227
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 2014-01-30 13:00:46 +00:00
Richard Brooksby
1982233b78 Adding a default chain to the arena. not used anywhere yet. 
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 Change: 184224
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 2014-01-29 18:07:43 +00:00
Richard Brooksby
e02a69f88b The awl and lo pools were allocating their segments along with other pool’s generation 1, while accounting sizes into generation 0. in fact, this “generation 1” was really a kind of placement “clump” and the segments really lived in generation 0. however, this confused the new chainalloc because there are no longer any “clumps” maintained by the arena, causing awlut to fail. fixed awl and lo to be truthful about the generation they’re allocating in. placement concerns have been removed. 
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 Change: 184220
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 2014-01-29 17:15:31 +00:00
Richard Brooksby
eba2dc5a54 Bringing strategy design up to date with changes to zone allocation. 
Adding design documents to Xcode project for easier editing and source control.

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 Change: 184218
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 2014-01-29 15:26:04 +00:00
Richard Brooksby
8e4e0f066e Eliminating dodgy use of *segprefdefault() which could lead to implicit calls to memcpy. 
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 Change: 184217
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 2014-01-29 15:13:22 +00:00
Richard Brooksby
f719851f50 Since the dynamic generation is shared between chains (for some reason) using its unified zone set, rather than keeping a special zone set per chain, which would’ve used up more zones. 
Using arena->topGen->mortality for the dynamic generation’s mortality, rather than a global variable.

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 Change: 184216
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 2014-01-29 13:49:42 +00:00
Richard Brooksby
f1abe0e30f Abolishing the redundant generation to zone map in the vm arena, and replacing it with chainalloc, which allocates segments within a generation. 
Generations from different chains will no longer share the same zone sets, and will not be collected together.  To get this behaviour, use the same chain, as documented.

Copied from Perforce
 Change: 184213
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 2014-01-29 12:54:05 +00:00
Richard Brooksby
10e9a638e4 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
56d48bbd1d 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
893ac1da13 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
a788a9efdd Ignoring a.out (default output from cc). 
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 Change: 184116
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 2014-01-25 15:24:28 +00:00
Richard Brooksby
f91a987e32 Inclusion order mysteriously prevents profiling under xcode. 
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 Change: 184111
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 2014-01-24 16:00:49 +00:00
Richard Brooksby
8ef0ecb155 Merging the "dj" benchmark from the benchmarking development branch. 
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 Change: 184106
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 2014-01-24 15:29:28 +00:00