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reduce the lock contention in task spawn. #6001

Merged
merged 104 commits into from Dec 7, 2023
Merged

reduce the lock contention in task spawn. #6001

merged 104 commits into from Dec 7, 2023

Commits on Sep 12, 2023

  1. reduce the lock contention in task spawn. 

    The origin version:

spawn_tasks_current_thread
                        time:   [654.87 ns 664.26 ns 672.13 ns]
                        change: [-4.5814% -1.2511% +2.1604%] (p = 0.48 > 0.05)
                        No change in performance detected.

spawn_tasks_current_thread_parallel
                        time:   [537.55 ns 540.00 ns 542.20 ns]
                        change: [-1.0603% -0.2591% +0.6283%] (p = 0.58 > 0.05)
                        No change in performance detected.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) high severe

spawn_tasks             time:   [1.0447 µs 1.0533 µs 1.0610 µs]
                        change: [+0.9379% +2.2768% +3.7191%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
  1 (1.00%) low severe
  2 (2.00%) low mild

spawn_tasks_parallel    time:   [992.38 ns 1.0002 µs 1.0073 µs]
                        change: [+0.1973% +1.4194% +2.5819%] (p = 0.02 < 0.05)
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  1 (1.00%) low severe
  2 (2.00%) low mild
  1 (1.00%) high mild
  2 (2.00%) high severe

This version:

spawn_tasks_current_thread
                        time:   [705.92 ns 724.31 ns 739.78 ns]

spawn_tasks_current_thread_parallel
                        time:   [529.33 ns 531.00 ns 532.61 ns]
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) high mild
  1 (1.00%) high severe

spawn_tasks             time:   [881.56 ns 892.21 ns 902.10 ns]
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) low mild
  1 (1.00%) high mild

spawn_tasks_parallel    time:   [815.00 ns 819.87 ns 824.60 ns]
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) high mild
  2 (2.00%) high severe
    @wathenjiang
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  2. Merge branch 'master' into reduce-lock-contention

    @wathenjiang
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  3. rm extra criterion in dependencies

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    wathenjiang committed Sep 12, 2023
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  4. restart a ci

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  5. fix for each

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  6. fix for_each

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  7. reduce the size of header

    @wathenjiang
    wathenjiang committed Sep 12, 2023
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Commits on Sep 13, 2023

  1. code refactor in list.rs

    @wathenjiang
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  2. change ordering of atomic

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  3. fix iterate in close_and_shutdown

    @wathenjiang
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  4. Merge branch 'master' into reduce-lock-contention

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  5. fix iterate in close_and_shutdown

    @wathenjiang
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  6. fix atomic method

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Commits on Sep 20, 2023

  1. rm type CountedOwnedTasksInner

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  2. refactor for_each

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  3. Merge branch 'master' into reduce-lock-contention

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  4. use atomic type in loom instead

    @wathenjiang
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  5. fix: put read closed flag after got the lock for avoid concurrency pr… 

    …oblems
    @wathenjiang
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  6. introduce random make shutdown faster

    @wathenjiang
    wathenjiang committed Sep 20, 2023
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  7. use grain instead

    @wathenjiang
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  8. fix: dead lock

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  9. Merge branch 'master' into reduce-lock-contention

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Commits on Sep 21, 2023

  1. fix: use list_inner to offer lock of list

    @wathenjiang
    wathenjiang committed Sep 21, 2023
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  2. fix: use segment_size instead of grain

    @wathenjiang
    wathenjiang committed Sep 21, 2023
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  3. clippy

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    wathenjiang committed Sep 21, 2023
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  4. feat: let spawn_concurrency_level configurable

    @wathenjiang
    wathenjiang committed Sep 21, 2023
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  5. feat: update benchmark

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  6. feat: add benchmarks for spawn_concurrency_level

    @wathenjiang
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Commits on Sep 22, 2023

  1. change spawn_concurrency_level to be 4 times the number of worker thr… 

    …eads
    @wathenjiang
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  2. Merge branch 'master' into reduce-lock-contention

    @wathenjiang
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  3. change benchmark tests name from shutdown_parallel_multi_thread to sh… 

    …utdown_runtime_multi_thread
    @wathenjiang
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  4. fix the comments on spawn_concurrency_level

    @wathenjiang
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  5. add comments for parameter in OwnedTasks.close_and_shutdown_all

    @wathenjiang
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  6. fix comments

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    wathenjiang committed Sep 22, 2023
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Commits on Sep 24, 2023

  1. style nit: simplify code, apply suggestions from hawkw

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Commits on Sep 25, 2023

  1. make spawn_concurrency_level is constant 4 in loom test

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Commits on Sep 28, 2023

  1. use Header::get_id to get task_id

    @wathenjiang
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  2. change owned_id to u64 back

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  3. refactor: use local_staic in loom

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Commits on Sep 29, 2023

  1. fix: OwnedTasks get all locks first

    @wathenjiang
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  2. fix: rm segment_size field of OwnedTasks, use method to return it ins… 

    …tead
    @wathenjiang
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Commits on Oct 1, 2023

  1. feat: make spawn_concurrency_level to be a unstable api

    @wathenjiang
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  2. feat: rm shutdown flag

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  3. rm benches/spawn_concurrent.rs because it is unstable now in tokio

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Commits on Oct 3, 2023

  1. use get_unchecked to get segment lock

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Commits on Oct 15, 2023

  1. feat: drop lock promptly and explicitly

    @wathenjiang
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  2. feat: move the atomic operations of count into the lock

    @wathenjiang
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Commits on Oct 17, 2023

  1. Merge branch 'master' into reduce-lock-contention

    @wathenjiang
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Commits on Oct 23, 2023

  1. first commit

    @wathenjiang
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  2. add Safety

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  3. mutable ref to immutable ref

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  4. use std AtomicUsize

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  5. fix: count sub in pop_back

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  6. refactor doube check closed flag in bind_inner

    @wathenjiang
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  7. cast task_id to usize

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  8. use ShardGuard

    @wathenjiang
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  9. update comments

    @wathenjiang
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  10. update comments

    @wathenjiang
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  11. fix: remove needless reference

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  12. fix: release lock as far as possible

    @wathenjiang
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Commits on Nov 6, 2023

  1. Update tokio/src/runtime/task/list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  2. Update tokio/src/util/sharded_list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  3. Update tokio/src/util/sharded_list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  4. Update tokio/src/util/sharded_list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  5. Update tokio/src/util/sharded_list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  6. Update tokio/src/util/sharded_list.rs 

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  7. Update tokio/src/util/sharded_list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  8. Update tokio/src/runtime/task/list.rs 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
    @wathenjiang @Darksonn
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  9. fix: accept ownedship of closue in method for_each of OwnedTasks

    @wathenjiang
    wathenjiang committed Nov 6, 2023
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  10. Merge branch 'master' into reduce-lock-contention

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Commits on Nov 7, 2023

  1. Apply suggestions from code review 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  2. Apply suggestions from code review 

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  3. Apply suggestions from code review 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  4. Apply suggestions from code review 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  5. rm unused push method

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  6. rename get_sharded_id to get_shard_id

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  7. Apply suggestions from code review 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  8. rename get_sharded_id to get_shard_id

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  9. add sentence in comments

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  10. rm dead_code attr

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  11. Merge branch 'master' into reduce-lock-contention

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  12. move spawn_concurrent_level size from shardedList to builder

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  13. update comments

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  14. update comments

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  15. update comments

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  16. rm loop in ShardedList::new

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  17. fix rustfmt

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  18. fix

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  19. fix spawn_concurrency_level

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  20. fix spawn_concurrency_level

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  21. rm get_spawn_concurrency_level to cfg_rt_multi_thread

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  22. add allow(dead_code))]

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Commits on Nov 8, 2023

  1. rm dead_code attr

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Commits on Nov 22, 2023

  1. make spawn_concurrency_level unconfigurable

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Commits on Nov 24, 2023

  1. Apply suggestions from code review 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
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  2. apply suggestions from core review

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  3. move get_spawn_concurrency_level from builder to task/list.rs

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  4. feat: add comments and rm loom cfg

    @wathenjiang
    wathenjiang committed Nov 24, 2023
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  5. feat: update comments for gen_shared_list_size

    @wathenjiang
    wathenjiang committed Nov 24, 2023
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  6. feat: update comments for gen_shared_list_size

    @wathenjiang
    wathenjiang committed Nov 24, 2023
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Commits on Nov 26, 2023

  1. Apply suggestions from code review 

    Co-authored-by: Alice Ryhl <aliceryhl@google.com>
    @wathenjiang @Darksonn
    wathenjiang and Darksonn committed Nov 26, 2023
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  2. fix: fmt and typo fix

    @wathenjiang
    wathenjiang committed Nov 26, 2023
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Commits on Dec 7, 2023

  1. Update tokio/src/util/sharded_list.rs

    @Darksonn
    Darksonn committed Dec 7, 2023
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  2. Merge branch 'master' into reduce-lock-contention

    @Darksonn
    Darksonn committed Dec 7, 2023
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