Commit Graph

3378 Commits

Author SHA1 Message Date
Alex Lapenkou
97da57c13a HPA: Add min_purge_interval_ms option
This rate limiting option is required to avoid purging too often.
2021-09-17 16:56:41 -07:00
Alex Lapenkou
b8b8027f19 Allow PAI to calculate time until deferred work
Previously the calculation of sleep time between wakeups was implemented within
background_thread. This resulted in some parts of decay and hpa specific
logic mixing with background thread implementation. In this change, background
thread delegates this calculation to arena and it, in turn, delegates it to PAI.
The next step is to implement the actual calculation of time until deferred work
in HPA.
2021-09-17 16:56:41 -07:00
Alex Lapenkou
26140dd246 Reject --enable-prof-libunwind without --enable-prof
Prior to the change you could specify --enable-prof-libunwind without
--enable-prof which would do effectively nothing. This was confusing as I
expected --enable-prof-libunwind to act like --enable-prof, but use libunwind.
2021-09-13 14:02:40 -07:00
Mingli Yu
e5062e9fb9 Makefile.in: make sure doc generated before install
There is a race between the doc generation and the doc installation,
so make the install depend on the build for doc.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
2021-09-13 13:40:39 -07:00
Qi Wang
8b24cb8fdf Don't assume initialized arena in the default alloc hook.
Specifically, this change allows the default alloc hook to used during
arenas.create.  One use case is to invoke the default alloc hook in a customized
hook arena, i.e. the default hooks can be read out of a default arena, then
create customized ones based on these hooks.  Note that mixing the default with
customized hooks is not recommended, and should only be considered when the
customization is simple and straightforward.
2021-08-25 14:19:25 -07:00
Alex Lapenkou
c01a885e94 HPA: Correctly calculate retained pages
Retained pages are those which haven't been touched and are unbacked from OS
perspective. For a pageslab their number should equal "total pages in slab"
minus "touched pages".
2021-08-20 18:06:17 -07:00
Alex Lapenkou
2c625d5cd9 Fix warnings when compiled with clang
When clang sees an unknown warning option, unlike gcc it doesn't fail the build
with error. It issues a warning. Hence JE_CFLAGS_ADD with warning options that
didnt't exist in clang would still mark those options as available. This led to
several warnings when built with clang or "gcc" on OSX. This change fixes those
warnings by simply making clang fail builds with non-existent warning options.
2021-08-13 14:14:46 -07:00
Alex Lapenkou
9d02bdc883 Port gen_run_tests.py to python3
Insignificant changes to make the script runnable on python3.
2021-08-13 10:59:32 -07:00
Qi Wang
5884a076fb Rename prof.dump_prefix to prof.prefix
This better aligns with our naming convention.  The option has not been included
in any upstream release yet.
2021-08-12 23:04:29 -07:00
Qi Wang
6a01600712 Add Cirrus CI testing matrix
Contains 16 testing configs -- a mix of debug, prof, -m32
and a few uncommon options.
2021-08-10 09:59:10 -07:00
Alex Lapenkou
f58064b932 Verify that HPA is used before calling its functions
This change eliminates the possibility of PA calling functions of uninitialized
HPA.
2021-08-05 16:43:28 -07:00
David Goldblatt
27f71242b7 Mutex: Tweak internal spin count.
The recent pairing heap optimizations flattened the lock hold time profile.
This was a win for raw cycle counts, but ended up causing us to "just miss"
acquiring the mutex before sleeping more often.  Bump those counts.
2021-08-05 14:33:16 -07:00
David Goldblatt
6f41ba55ee Mutex: Make spin count configurable.
Don't document it since we don't want to support this as a "real" setting, but
it's handy for testing.
2021-08-05 10:13:53 -07:00
David Goldblatt
dae24589bc PH: Insert-below-min fast-path. 2021-08-02 15:02:49 -07:00
David Goldblatt
40d53e007c ph: Add aux-list counting and pre-merging. 2021-08-02 15:02:49 -07:00
David Goldblatt
dcb7b83fac Eset: Cache summary information for heap edatas.
This lets us do a single array scan to find first fits, instead of taking a
cache miss per examined size class.
2021-08-02 15:02:49 -07:00
David Goldblatt
252e0942d0 Eset: Pull per-pszind data into structs.
We currently have one for stats and one for the data.  The data struct is just a
wrapper around the edata_heap_t, but this will change shortly.
2021-08-02 15:02:49 -07:00
David Goldblatt
dc0a4b8b2f Edata: Pull out comparison fields into a summary.
For now, this is a no-op; eventually, it will allow some caching in the eset.
2021-08-02 15:02:49 -07:00
David Goldblatt
0170dd198a Edata: Fix a couple typos.
Some readability-enhancing whitespace, and a spelling error.
2021-08-02 15:02:49 -07:00
David Goldblatt
08a4cc0969 Pairing heap: inline functions instead of macros.
By force-inlining everything that would otherwise be a macro, we get the same
effect (it's not clear in the first place that this is actually a good idea, but
it avoids making any changes to the existing performance profile).

This makes the code more maintainable (in anticipation of subsequent changes),
as well as making performance profiles and debug info more readable (we get
"real" line numbers, instead of making everything point to the macro definition
of all associated functions).
2021-08-02 15:02:49 -07:00
David Goldblatt
92a1e38f52 edata_cache: Allow unbounded fast caching.
The edata_cache_small had a fill/flush heuristic.  In retrospect, this was a
premature optimization; more testing indicates that an unbounded cache is
effectively fine here, and moreover we spend a nontrivial amount of time doing
unnecessary filling/flushing.

As the HPA takes on a larger and larger fraction of all allocations, any
theoretical differences in allocation patterns should shrink.  The HPA is more
efficient with its metadata in general, so it still comes out ahead on metadata
usage anyways.
2021-07-26 15:14:37 -07:00
David Goldblatt
d93eef2f40 HPA: Introduce a redesigned hpa_central_t.
For now, this only handles allocating virtual address space to shards, with no
reuse.  This is framework, though; it will change over time.
2021-07-23 21:59:59 -07:00
David Goldblatt
e09eac1d4e Remove hpa_central.
This is now dead code.
2021-07-23 21:59:59 -07:00
Alex Lapenkou
c88fe355e6 Add unit tests for decay
After slight changes in the interface, it's an opportunity to enhance unit
tests.
2021-07-22 23:19:09 -07:00
Alex Lapenkou
aaea4fd1e6 Add more documentation to decay.c
It took me a while to understand why some things are implemented the way they
are, so hopefully it will help future readers.
2021-07-22 23:19:09 -07:00
Alex Lapenkou
4b633b9a81 Clean up background thread sleep computation
Isolate the computation of purge interval from background thread logic and
move into more suitable file.
2021-07-22 23:19:09 -07:00
David Goldblatt
6630c59896 HPA: Hugification hysteresis.
We wait a while after deciding a huge extent should get hugified to see if it
gets purged before long.  This avoids hugifying extents that might shortly get
dehugified for purging.

Rename and use the hpa_dehugification_threshold option support code for this,
since it's now ignored.
2021-07-12 17:59:18 -07:00
David Goldblatt
113938b6f4 HPA: Pull out a hooks type.
For now, this is a no-op change.  In a subsequent commit, it will be useful for
testing.
2021-07-12 17:59:18 -07:00
David Goldblatt
1d4a7666d5 HPA: Do deferred operations on background threads. 2021-07-12 17:59:18 -07:00
David Goldblatt
583284f2d9 Add HPA deferral functionality. 2021-07-12 17:59:18 -07:00
David Goldblatt
ace329d11b HPA batch dalloc: Just do one deferred work check.
We only need to do one check per batch dalloc, not one check per dalloc in the
batch.
2021-07-12 17:59:18 -07:00
David Goldblatt
47d8a7e6b0 psset: Purge empty slabs first.
These are particularly good candidates for purging (listed in the diff).
2021-07-12 17:59:18 -07:00
David Goldblatt
41fd56605e HPA: Purge across retained extents.
This lets us cut down on the number of expensive system calls we perform.
2021-07-12 17:59:18 -07:00
David Goldblatt
347523517b PAI: Fix a typo. 2021-07-12 17:59:11 -07:00
David Goldblatt
9c42ed2d14 Travis: Don't test "clang" on OS X.
On OS X, "gcc" is really just clang anyways, so this combination gets tested by
the gcc test.  This is purely redundant, and (since it runs early in the output)
increases time to signal for real breakages further down in the list.
2021-07-08 09:53:28 -07:00
David Goldblatt
d202218e86 HPA: Fix typos with big performance implications.
This fixes two simple but significant typos in the HPA:
- The conf string parsing accidentally set a min value of PAGE for
  hpa_sec_batch_fill_extra; i.e. allocating 4096 extra pages every time we
  attempted to allocate a single page.  This puts us over the SEC flush limit,
  so we then immediately flush all but one of them (probably triggering
  purging).
- The HPA was using the default PAI batch alloc implementation, which meant it
  did not actually get any locking advantages.

This snuck by because I did all the performance testing without using the PAI
interface or config settings.  When I cleaned it up and put everything behind
nice interfaces, I only did correctness checks, and didn't try any performance
ones.
2021-06-24 16:26:55 -07:00
David Goldblatt
de033f56c0 mpsc_queue: Add module.
This is a simple multi-producer, single-consumer queue.  The intended use case
is in the HPA, as we begin supporting hpdatas that move between hpa_shards.  We
take just a single CAS as the cost to send a message (or a batch of messages) in
the low-contention case, and lock-freedom lets us avoid some lock-ordering
issues.
2021-06-24 14:55:49 -07:00
David Goldblatt
4452a4812f Add opt.experimental_infallible_new.
This allows a guarantee that operator new never throws.

Fix the .gitignore rules to include test/integration/cpp while we're here.
2021-06-24 12:22:51 -07:00
David Goldblatt
0689448b1e Travis: Unbreak the builds.
In the hopes of future-proofing as much as possible, jump to the latest
distribution Travis supports.
2021-06-24 07:40:28 -07:00
David Carlier
4fb93a18ee extent_can_acquire_neighbor typo fix 2021-06-19 08:13:11 -07:00
Vineet Gupta
2381efab57 ARC: add Minimum allocation alignment
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2021-06-03 13:43:38 -07:00
Ondřej Surý
2c0f4c2ac3 Fix typo in configure.ac: experimetal -> experimental 2021-05-25 08:20:37 -07:00
David Goldblatt
36c6bfb963 SEC: Allow arbitrarily many shards, cached sizes. 2021-05-22 08:17:41 -07:00
Deanna Gelbart
11beab38bc Added --debug-syms-by-id option 2021-05-17 10:00:40 -07:00
Qi Wang
08089589f7 Fix an interaction between the oversize_threshold test and bgthds.
Also added the shared utility to check if background_thread is enabled.
2021-05-13 16:19:14 -07:00
David Goldblatt
5417938215 Red-black tree: add summarize/filter.
This allows tracking extra information in the nodes of an red-black tree to
filter searches in the tree to just those that match some property.
2021-05-12 11:14:23 -07:00
David Goldblatt
b2c08ef2e6 RB unit tests: don't test reentrantly.
The RB code doesn't do any allocation, and takes a little bit of time to run.
There's no sense in doing everything three times.
2021-05-12 11:14:23 -07:00
David Goldblatt
aea91b8c33 Clean up some minor data structure inconsistencies
Namely, unify the include guard styling with the majority of the project, and do
flat_bitmap -> fb, to match its naming convention.
2021-05-12 11:14:23 -07:00
David Goldblatt
1f688490e1 Stats: Fix a printing bug when hpa_dirty_mult = -1
Missed a layer of indirection.
2021-05-05 19:45:25 -07:00
David Goldblatt
4f7cb3a413 Sized deallocation: fix a typo.
dealloction -> deallocation.
2021-05-04 16:46:15 -07:00