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35 Commits

Author SHA1 Message Date
Qi Wang
7dc77527ba Delete the mutex_pool module. 2021-03-29 17:19:53 -07:00
Qi Wang
3093d9455e Move the edata mergeability related functions to extent.h. 2021-03-29 17:19:53 -07:00
Qi Wang
7c964b0352 Add rtree_write_range(): writing the same content to multiple leaf elements. 
Apply to emap_(de)register_interior which became noticeable in perf profiles.
 2021-03-29 17:19:53 -07:00
Qi Wang
add636596a Stop checking head state in the merge hook. 
Now that all merging go through try_acquire_edata_neighbor, the mergeablility
checks (including head state checking) are done before reaching the merge hook.
In other words, merge hook will never be called if the head state doesn't agree.
 2021-03-29 17:19:53 -07:00
Qi Wang
49b7d7f0a4 Passing down the original edata on the expand path. 
Instead of passing down the new_addr, pass down the active edata which allows us
to always use a neighbor-acquiring semantic.  In other words, this tells us both
the original edata and neighbor address.  With this change, only neighbors of a
"known" edata can be acquired, i.e. acquiring an edata based on an arbitrary
address isn't possible anymore.
 2021-03-29 17:19:53 -07:00
Qi Wang
1784939688 Use rtree tracked states to protect edata outside of ecache locks. 
This avoids the addr-based mutexes (i.e. the mutex_pool), and instead relies on
the metadata tracked in rtree leaf: the head state and extent_state.  Before
trying to access the neighbor edata (e.g. for coalescing), the states will be
verified first -- only neighbor edatas from the same arena and with the same
state will be accessed.
 2021-03-29 17:19:53 -07:00
Qi Wang
4d8c22f9a5 Store edata->state in rtree leaf and make edata_t 128B aligned. 
Verified that this doesn't result in any real increase of edata_t bytes
allocated.
 2021-03-29 17:19:53 -07:00
Qi Wang
70d1541c5b Track extent is_head state in rtree leaf. 2021-03-29 17:19:53 -07:00
David Goldblatt
1ed7ec369f Emap: Add emap_assert_not_mapped. 
The counterpart to emap_assert_mapped, it lets callers check that some edata is
not already in the emap.
 2020-10-05 19:55:57 -07:00
David Goldblatt
e034500698 Edata: rename "ranged" bit to "pai". 
This better represents its intended purpose; the hugepage allocator design
evolved away from needing contiguity of hugepage virtual address space.
 2020-09-18 12:39:25 -07:00
David Goldblatt
eda9c2858f Edata: zero stack edatas before initializing. 
This avoids some UB. No compilers take advantage of it for now, but no sense in
tempting fate.
 2020-05-14 10:30:20 -07:00
David Goldblatt
79ae7f9211 Rtree: Remove the per-field accessors. 
We instead split things into "edata" and "metadata".
 2020-04-10 13:12:47 -07:00
David Goldblatt
bb6a418523 Emap: Drop szind/slab splitting parameters. 
After the previous diff, these are constants.
 2020-04-10 13:12:47 -07:00
David Goldblatt
dc26b30094 Rtree: Clean up compact/non-compact split. 2020-04-10 13:12:47 -07:00
David Goldblatt
294b276fc7 PA: Parameterize emap. Move emap_global to arena. 
This lets us test the PA module without interfering with the global emap used by
the real allocator (the one not under test).
 2020-04-10 13:12:47 -07:00
David Goldblatt
883ab327cc Emap: Move out last edata state touching. 2020-04-10 13:12:47 -07:00
David Goldblatt
0c96a2f03b Emap: Move out remaining edata modifications. 2020-04-10 13:12:47 -07:00
David Goldblatt
dfef0df71a Emap: Move edata modification out of emap_remap. 2020-04-10 13:12:47 -07:00
David Goldblatt
12eb888e54 Edata: Add a ranged bit. 
We steal the dumpable bit, which we ended up not needing.
 2020-04-10 13:12:47 -07:00
David Goldblatt
bd4fdf295e Rtree: Pull leaf contents into their own struct. 2020-04-10 13:12:47 -07:00
David T. Goldblatt
a0c1f4ac57 Rtree: take the base allocator as a parameter. 
This facilitates better testing by avoiding mixing of the "real" base with the
base used by the rtree under test.
 2020-02-18 11:22:09 -08:00
David T. Goldblatt
7013716aaa Emap: Take (and propagate) a zeroed parameter. 
Rtree needs this, and we should really treat them similarly.
 2020-02-18 11:22:09 -08:00
David Goldblatt
65a54d7714 Emap: Move in szind and slab modifications. 2020-02-17 10:50:51 -08:00
David Goldblatt
1d449bd9a6 Emap: Internal rtree context setting. 
The only time sharing an rtree context saves across extent operations isn't a
no-op is when tsd is unavailable.  But this happens only in situations like
thread death or initialization, and we don't care about shaving off every
possible cycle in such scenarios.
 2020-02-17 10:50:51 -08:00
David Goldblatt
08eb1e6c31 Emap: Comments and cleanup 
Document some of the public interface, and hide the functions that are no longer
used outside of the emap module.
 2020-02-17 10:50:51 -08:00
David Goldblatt
231d1477e5 Rename emap_split_prepare_t -> emap_prepare_t. 
Both the split and merge functions use it.
 2020-02-17 10:50:51 -08:00
David Goldblatt
0586a56f39 Emap: Move in merge functionality. 2020-02-17 10:50:51 -08:00
David Goldblatt
040eac77cc Tell edatas their creation arena immediately. 
This avoids having to pass it in anywhere else.
 2020-02-17 10:50:51 -08:00
David Goldblatt
7c7b702064 Emap: Move over metadata splitting logic. 2020-02-17 10:50:51 -08:00
David Goldblatt
44f5f53605 Emap: Move over deregistration functions. 2020-02-17 10:50:51 -08:00
David Goldblatt
6513d9d923 Emap: Move over deregistration boundary functions. 2020-02-17 10:50:51 -08:00
David Goldblatt
9b5ca0b09d Emap: Move in slab interior registration. 2020-02-17 10:50:51 -08:00
David Goldblatt
d05b61db4a Emap: Move extent boundary registration in. 2020-02-17 10:50:51 -08:00
David Goldblatt
ca21ce4071 Emap: Move in write_acquired from extent. 2020-02-17 10:50:51 -08:00
David Goldblatt
01f255161c Add emap, for tracking extent locking. 2020-02-17 10:50:51 -08:00