Andy Wingo
0cff6ffba4
Basic stats also record CPU time
2025-03-13 13:44:02 +01:00
Andy Wingo
d22eb88948
nofl space / mmc supports untagged allocations
2025-03-07 13:37:59 +01:00
Andy Wingo
521cd44ebd
Add gc_allocation_kind argument to gc_allocate
...
Adapt all users. Will eventually allow for mmc to have untagged
allocations.
2025-03-07 13:37:59 +01:00
Andy Wingo
6c444b33f1
Remove card-marking barriers
...
Field barriers aren't slower and are more precise.
2025-03-07 13:37:59 +01:00
Andy Wingo
4a95a514b7
Fix inline old-generation check for nofl space mark byte changes
2025-03-07 13:37:59 +01:00
Andy Wingo
f1b660484e
Remove gc_allocator_needs_clear
...
Whether the returned object needs to be cleared or not depends on a
couple things:
- Whether the embedder actually needs the object to be cleared.
- Whether the collector allocated the object from memory that was all
zeroes already.
The goal of course would be to prevent clearing memory if the mutator
was just going to write all over it. But it's hard to know statically
if the memory would have been all zeroes anyway, and in that case if you
did clear it you'd be doing double work. In the end it's simpler to
just require collectors to clear memory in bulk. We can revisit this
later if it is an issue.
2025-03-07 13:37:59 +01:00
Andy Wingo
ed5db9bc36
nofl: Reclaim another mark bit if concurrent tracing is disabled
2025-03-05 17:17:55 +01:00
Andy Wingo
81da950ebe
Steal becomes an instant event
2025-02-12 14:33:05 +01:00
Andy Wingo
d675a9b8f1
Add tracepoints to tracer itself
...
Also fix an issue whereby the main thread would spin, waiting for other
active threads to finish, doing no work itself.
2025-02-11 16:14:27 +01:00
Andy Wingo
cca54736a0
Add build support for tracepoints via lttng-ust
2025-02-10 12:45:25 +01:00
Andy Wingo
5fdb14cc5e
Remove "ABORTED" atomic forwarding state
...
It was not distinguishable from "NOT_FORWARDED".
2025-01-13 16:44:12 +01:00
Andy Wingo
65b74b5abb
Add generational support to pcc
2025-01-10 16:40:14 +01:00
Andy Wingo
e4048b5296
Add offset to field-logging fast path
2025-01-10 16:05:34 +01:00
Andy Wingo
274cf43864
Add new old-gen predicate method: check a range of addresses
2025-01-06 16:59:54 +01:00
Andy Wingo
d96b53facd
Missing inline decl: gc_old_generation_check_alloc_table_bit_pattern
2025-01-06 16:59:54 +01:00
Andy Wingo
8e631ca3f3
Remove embedder requirement for per-object remset bits
...
Since we now have a field-logging write barrier, we don't need
per-object log bits.
2025-01-06 16:59:54 +01:00
Andy Wingo
15a51c8a85
Fix embarrassing bugs in write buffer fast path
...
Check edge address, not object address, and reverse the sense of the
check!
2024-10-04 13:50:01 +02:00
Andy Wingo
e1ae9819cf
gc_object_is_old_generation uses relaxed atomics
2024-10-04 13:49:45 +02:00
Andy Wingo
3c8c956f4c
Add gc_edge_address
2024-10-04 13:49:27 +02:00
Andy Wingo
b5c36b9fd8
Explicitly support immediate values
...
Because we have to deref edges ourselves, as part of generational
marking, we need to ignore edges that don't point to heap objects.
2024-10-04 11:40:09 +02:00
Andy Wingo
095515eaed
Rework write barrier fast/slow paths
2024-10-02 21:36:33 +02:00
Andy Wingo
1ecb45a437
Switch mmc to field-logging write barrier
...
Instead of the card table, use metadata bytes for field-logging. More
precision should lead to less work during the pause.
2024-10-02 21:25:09 +02:00
Andy Wingo
1493bf6398
Add gc_object_is_old_generation
...
Will be useful for write barriers.
2024-10-01 15:48:55 +02:00
Andy Wingo
cc04761271
gc_object_set_remembered returns nonzero on success
2024-10-01 14:36:55 +02:00
Andy Wingo
1f4e3bdf37
Add field-logging write barrier (fast path only)
...
Add a new kind of write barrier, one which has a bit per field; the
mutator that sets the bit will need to add the field's location (the
edge) to a remembered set. Here we just have the fast-path
implementation.
2024-10-01 10:34:27 +02:00
Andy Wingo
8fba0e5322
Implement cooperative safepoint API
...
Fixes https://github.com/wingo/whippet/issues/9 .
2024-09-18 11:54:36 +02:00
Andy Wingo
9f26dbb1fc
Implement per-object pinning API
...
Fixes https://github.com/wingo/whippet/issues/6 .
2024-09-18 10:55:02 +02:00
Andy Wingo
2818958c59
First version of adaptive heap sizing for pcc and mcc
2024-09-16 09:59:55 +02:00
Andy Wingo
1ff082705e
Remove scc
...
PCC with GC_PARALLEL=0 is exactly equivalent to SCC. Also now that PCC
will dynamically avoid atomic forwarding if parallelism is disabled at
run-time, there is no need to keep SCC around.
2024-09-10 11:10:47 +02:00
Andy Wingo
6545b34073
Reorder events in event listener; refactors to mmc and pcc
...
In GC, request mutators to stop before doing anything else; changes the
order of the event listener interface. Also, refactor mmc to look more
like pcc.
2024-09-10 10:55:38 +02:00
Andy Wingo
44a7240e16
Rename "whippet" collector to "mmc": mostly marking collector
2024-09-02 13:19:05 +02:00
Andy Wingo
004a3d0411
Factor nofl-space out of whippet
2024-08-21 10:19:26 +02:00
Andy Wingo
1925f84d3a
Add missing file
2024-08-05 14:44:34 +02:00
Andy Wingo
0ee58abb46
Add gc_finalizer_priority_count to gc-embedder-api.h
2024-08-05 11:56:46 +02:00
Andy Wingo
d3383ad911
Bulk-zero copy-space blocks
2024-08-05 11:48:25 +02:00
Andy Wingo
f6057184e1
Add finalizers
2024-07-23 22:33:29 +02:00
Andy Wingo
d5ef140dfe
Add parallel copying collector
2024-07-11 15:54:15 +02:00
Andy Wingo
d50455ed1b
Add new gc_atomic_forward_object_size API
...
Also remove an unused function in whippet.c
2024-07-10 11:50:05 +02:00
Andy Wingo
5ba0aec869
Remove unused function
2023-12-10 22:08:05 +01:00
Andy Wingo
1267f77de3
Basic stats records latency readings in a histogram, prints p95
2023-12-10 21:24:03 +01:00
Andy Wingo
4b51376447
Add mechanism to compose event listeners
2023-12-06 21:48:39 +01:00
Andy Wingo
2cab526963
Fix gc_basic_stats_finish
2023-10-20 14:14:29 +02:00
Andy Wingo
cfc8c8a9b8
Allow embedder to request a major GC
2023-10-18 16:34:20 +02:00
Andy Wingo
0c7bdacc51
Revert "Allow embedder to request a major GC"
...
This reverts commit f39e6ee69f0aa2e14227a019a5332ba129418977.
2023-10-18 15:13:41 +02:00
Andy Wingo
514dcc702e
Allow embedder to request a major GC
2023-10-18 15:13:41 +02:00
Andy Wingo
9ce8ee2921
Fix unused API, outdated assertion
2023-10-17 21:45:06 +02:00
Andy Wingo
5130380ae5
Rework stats collection to use listener interface
2023-10-16 12:13:08 +02:00
Andy Wingo
d56356fec7
Add gc_safepoint_mechanism gc attr
2023-10-02 22:47:35 +02:00
Andy Wingo
dc013cfb58
Change gc_allocate_ephemeron to return struct gc_ephemeron
2023-09-11 11:48:32 +02:00
Andy Wingo
db36c48efd
Update extern space API to allow for evacuation
2023-08-16 11:08:12 +02:00
