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10 commits

Author SHA1 Message Date
guangli-dai
defc7abbb1 Add background-thread state and toggle unit tests 
New tests cover:
  - background thread states after arena_reset
  - background thread stats
  - toggle background thread on and off during parallel stress
    allocs/dallocs
  - background thread fork behavior

Add background-thread fork unit test

test_fork_background_thread (in fork.c): with the background thread enabled,
fork and assert the child comes up with it disabled yet usable (re-enable +
alloc round-trips), while the parent keeps its threads.  Placed in fork.c to
reuse its wait_for_child_exit helper and fork/WIN32 handling instead of
duplicating them in a separate file.
 2026-07-16 15:43:29 -07:00
guangli-dai
6200e8987f Reformat the codebase with the clang-format 18. 2026-03-10 18:14:33 -07:00
Qi Wang
607b866035 Check for 0 input when setting max_background_thread through mallctl. 
Reported by @nc7s.
 2025-01-28 10:38:56 -08:00
Qi Wang
97b313c7d4 More conservative setting for /test/unit/background_thread_enable. 
Lower the thread and arena count to avoid resource exhaustion on 32-bit.
 2023-02-16 14:42:21 -08:00
Qi Wang
66c889500a Make test/unit/background_thread_enable more conservative. 
To avoid resource exhaustion on 32-bit platforms.
 2022-05-04 15:32:57 -07:00
Yinan Zhang
21dfa4300d Change assert_* to expect_* in tests 
```
grep -Irl assert_ test/ | xargs sed -i \
    's/witness_assert/witness_do_not_replace/g';
grep -Irl assert_ test/ | xargs sed -i \
    's/malloc_mutex_assert_owner/malloc_mutex_do_not_replace_owner/g';

grep -Ir assert_ test/ | grep -o "[_a-zA-Z]*assert_[_a-zA-Z]*" | \
    grep -v "^assert_"; # confirm no output
grep -Irl assert_ test/ | xargs sed -i 's/assert_/expect_/g';

grep -Irl witness_do_not_replace test/ | xargs sed -i \
    's/witness_do_not_replace/witness_assert/g';
grep -Irl malloc_mutex_do_not_replace_owner test/ | xargs sed -i \
    's/malloc_mutex_do_not_replace_owner/malloc_mutex_assert_owner/g';
```
 2020-02-19 16:03:16 -08:00
Qi Wang
b293a3eb86 Fix the max_background_thread test. 
We may set number of background threads separately, e.g. through
--with-malloc-conf, so avoid assuming the default number in the test.
 2018-05-15 14:00:51 -07:00
Dave Watson
8b14f3abc0 background_thread: add max thread count config 
Looking at the thread counts in our services, jemalloc's background thread
is useful, but mostly idle.  Add a config option to tune down the number of threads.
 2018-04-10 14:01:45 -07:00
Qi Wang
21eb0d15a6 Fix a background_thread shutdown issue. 
1) make sure background thread 0 is always created; and 2) fix synchronization
between thread 0 and the control thread.
 2018-04-02 10:03:47 -07:00
David Goldblatt
26b1c13982 Background threads: fix an indexing bug. 
We have a buffer overrun that manifests in the case where arena indices higher
than the number of CPUs are accessed before arena indices lower than the number
of CPUs.  This fixes the bug and adds a test.
 2018-02-27 19:43:05 -08:00