refactor: change some hashbrown RawTable uses to HashTable (round 2)
#13524
+89
−96
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
crepererum
commented
Nov 22, 2024
| } | ||
| std::mem::swap(&mut new_group_values, &mut group_values); | ||
|
|
||
| // SAFETY: self.map outlives iterator and is not modified concurrently |
There was a problem hiding this comment.
Picking this one, but this pattern occurs multiple times:
That SAFETY statement is just plain wrong: while iterating over the map, we erase elements from it. That is THE prime example for "concurrent modification of containers" and why Rust's lifetimes/reference system prevents that. I'm kinda surprised that this hasn't exploded yet.
|
The test failure (full logs here): Is the order of |
It isn't / shouldn't be AFAIK |
|
Test was fixed in #13547 |
|
Changes look good, can we run some benchmark? |
crepererum
force-pushed
the
crepererum/issue13256_b
branch
from
8d3ca50 to
655bb3d
Compare
|
I will run benchmarks |
alamb
approved these changes
Dec 4, 2024
There was a problem hiding this comment.
Thank you for working on this @crepererum 🙏 and for the review @Dandandan
My benchmark run show no significant difference in my measurements
--------------------
Benchmark clickbench_1.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query ┃ main_base ┃ crepererum_issue13256_b ┃ Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0 │ 0.69ms │ 0.70ms │ no change │
│ QQuery 1 │ 74.34ms │ 74.80ms │ no change │
│ QQuery 2 │ 128.56ms │ 129.12ms │ no change │
│ QQuery 3 │ 137.65ms │ 137.99ms │ no change │
│ QQuery 4 │ 983.51ms │ 1008.79ms │ no change │
│ QQuery 5 │ 1077.25ms │ 1092.78ms │ no change │
│ QQuery 6 │ 66.04ms │ 66.01ms │ no change │
│ QQuery 7 │ 84.05ms │ 81.62ms │ no change │
│ QQuery 8 │ 1055.63ms │ 1088.56ms │ no change │
│ QQuery 9 │ 1389.05ms │ 1366.73ms │ no change │
│ QQuery 10 │ 315.62ms │ 315.54ms │ no change │
│ QQuery 11 │ 350.14ms │ 349.13ms │ no change │
│ QQuery 12 │ 1085.67ms │ 1104.52ms │ no change │
│ QQuery 13 │ 1559.67ms │ 1529.49ms │ no change │
│ QQuery 14 │ 1013.55ms │ 1037.34ms │ no change │
│ QQuery 15 │ 1131.21ms │ 1137.18ms │ no change │
│ QQuery 16 │ 2108.99ms │ 2146.87ms │ no change │
│ QQuery 17 │ 1927.83ms │ 2000.34ms │ no change │
│ QQuery 18 │ 4072.99ms │ 4220.87ms │ no change │
│ QQuery 19 │ 125.13ms │ 125.87ms │ no change │
│ QQuery 20 │ 1384.71ms │ 1351.71ms │ no change │
│ QQuery 21 │ 1725.11ms │ 1731.10ms │ no change │
│ QQuery 22 │ 4297.71ms │ 4219.14ms │ no change │
│ QQuery 23 │ 10051.68ms │ 9978.79ms │ no change │
│ QQuery 24 │ 676.04ms │ 662.25ms │ no change │
│ QQuery 25 │ 592.05ms │ 579.24ms │ no change │
│ QQuery 26 │ 750.21ms │ 740.54ms │ no change │
│ QQuery 27 │ 2085.26ms │ 2066.92ms │ no change │
│ QQuery 28 │ 13592.24ms │ 13758.34ms │ no change │
│ QQuery 29 │ 589.33ms │ 575.83ms │ no change │
│ QQuery 30 │ 1058.22ms │ 1072.75ms │ no change │
│ QQuery 31 │ 1116.99ms │ 1123.70ms │ no change │
│ QQuery 32 │ 3966.33ms │ 3958.08ms │ no change │
│ QQuery 33 │ 4118.32ms │ 4251.35ms │ no change │
│ QQuery 34 │ 4127.26ms │ 4284.10ms │ no change │
│ QQuery 35 │ 1335.66ms │ 1401.46ms │ no change │
│ QQuery 36 │ 279.13ms │ 280.80ms │ no change │
│ QQuery 37 │ 179.19ms │ 191.29ms │ 1.07x slower │
│ QQuery 38 │ 189.74ms │ 188.54ms │ no change │
│ QQuery 39 │ 507.36ms │ 496.50ms │ no change │
│ QQuery 40 │ 86.52ms │ 86.86ms │ no change │
│ QQuery 41 │ 82.57ms │ 78.23ms │ +1.06x faster │
│ QQuery 42 │ 96.37ms │ 93.43ms │ no change │
└──────────────┴────────────┴─────────────────────────┴───────────────┘
--------------------
Benchmark clickbench_extended.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Query ┃ main_base ┃ crepererum_issue13256_b ┃ Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ QQuery 0 │ 2616.05ms │ 2656.28ms │ no change │
│ QQuery 1 │ 768.66ms │ 759.74ms │ no change │
│ QQuery 2 │ 1520.15ms │ 1525.95ms │ no change │
│ QQuery 3 │ 736.90ms │ 716.34ms │ no change │
│ QQuery 4 │ 12290.21ms │ 12253.70ms │ no change │
│ QQuery 5 │ 18882.98ms │ 19339.49ms │ no change │
└──────────────┴────────────┴─────────────────────────┴───────────┘
--------------------
Benchmark clickbench_partitioned.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┓
┃ Query ┃ main_base ┃ crepererum_issue13256_b ┃ Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━┩
│ QQuery 0 │ 2.27ms │ 2.31ms │ no change │
│ QQuery 1 │ 40.86ms │ 42.68ms │ no change │
│ QQuery 2 │ 99.41ms │ 101.10ms │ no change │
│ QQuery 3 │ 105.82ms │ 107.33ms │ no change │
│ QQuery 4 │ 912.48ms │ 932.39ms │ no change │
│ QQuery 5 │ 932.55ms │ 946.37ms │ no change │
│ QQuery 6 │ 35.68ms │ 36.18ms │ no change │
│ QQuery 7 │ 44.92ms │ 45.18ms │ no change │
│ QQuery 8 │ 992.36ms │ 1047.04ms │ 1.06x slower │
│ QQuery 9 │ 1332.22ms │ 1352.60ms │ no change │
│ QQuery 10 │ 286.57ms │ 291.61ms │ no change │
│ QQuery 11 │ 329.27ms │ 325.90ms │ no change │
│ QQuery 12 │ 977.72ms │ 964.00ms │ no change │
│ QQuery 13 │ 1433.26ms │ 1455.66ms │ no change │
│ QQuery 14 │ 871.22ms │ 883.98ms │ no change │
│ QQuery 15 │ 1118.00ms │ 1084.07ms │ no change │
│ QQuery 16 │ 1985.56ms │ 1997.37ms │ no change │
│ QQuery 17 │ 1808.17ms │ 1837.13ms │ no change │
│ QQuery 18 │ 3932.35ms │ 4008.86ms │ no change │
│ QQuery 19 │ 93.24ms │ 96.37ms │ no change │
│ QQuery 20 │ 1247.59ms │ 1233.37ms │ no change │
│ QQuery 21 │ 1487.30ms │ 1467.18ms │ no change │
│ QQuery 22 │ 2625.24ms │ 2635.53ms │ no change │
│ QQuery 23 │ 8641.57ms │ 8514.93ms │ no change │
│ QQuery 24 │ 518.85ms │ 497.01ms │ no change │
│ QQuery 25 │ 424.50ms │ 422.18ms │ no change │
│ QQuery 26 │ 578.49ms │ 572.19ms │ no change │
│ QQuery 27 │ 1827.42ms │ 1830.38ms │ no change │
│ QQuery 28 │ 12999.73ms │ 13048.48ms │ no change │
│ QQuery 29 │ 525.24ms │ 534.30ms │ no change │
│ QQuery 30 │ 891.65ms │ 901.06ms │ no change │
│ QQuery 31 │ 939.15ms │ 955.63ms │ no change │
│ QQuery 32 │ 3878.81ms │ 3787.85ms │ no change │
│ QQuery 33 │ 3892.96ms │ 3955.76ms │ no change │
│ QQuery 34 │ 3901.67ms │ 3960.14ms │ no change │
│ QQuery 35 │ 1282.81ms │ 1317.85ms │ no change │
│ QQuery 36 │ 229.45ms │ 236.91ms │ no change │
│ QQuery 37 │ 95.41ms │ 94.21ms │ no change │
│ QQuery 38 │ 130.10ms │ 132.25ms │ no change │
│ QQuery 39 │ 432.79ms │ 443.89ms │ no change │
│ QQuery 40 │ 58.16ms │ 56.40ms │ no change │
│ QQuery 41 │ 47.15ms │ 48.55ms │ no change │
│ QQuery 42 │ 62.84ms │ 65.08ms │ no change │
└──────────────┴────────────┴─────────────────────────┴──────────────┘
--------------------
Benchmark tpch_sf1.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query ┃ main_base ┃ crepererum_issue13256_b ┃ Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 1 │ 228.38ms │ 227.79ms │ no change │
│ QQuery 2 │ 112.54ms │ 115.45ms │ no change │
│ QQuery 3 │ 127.05ms │ 126.53ms │ no change │
│ QQuery 4 │ 80.58ms │ 82.23ms │ no change │
│ QQuery 5 │ 162.71ms │ 160.40ms │ no change │
│ QQuery 6 │ 42.19ms │ 58.91ms │ 1.40x slower │
│ QQuery 7 │ 210.22ms │ 206.61ms │ no change │
│ QQuery 8 │ 162.94ms │ 152.35ms │ +1.07x faster │
│ QQuery 9 │ 230.90ms │ 244.31ms │ 1.06x slower │
│ QQuery 10 │ 212.76ms │ 205.23ms │ no change │
│ QQuery 11 │ 96.69ms │ 95.20ms │ no change │
│ QQuery 12 │ 111.59ms │ 115.83ms │ no change │
│ QQuery 13 │ 207.61ms │ 208.17ms │ no change │
│ QQuery 14 │ 72.29ms │ 71.52ms │ no change │
│ QQuery 15 │ 121.95ms │ 126.59ms │ no change │
│ QQuery 16 │ 72.63ms │ 69.59ms │ no change │
│ QQuery 17 │ 221.69ms │ 215.65ms │ no change │
│ QQuery 18 │ 350.26ms │ 298.38ms │ +1.17x faster │
│ QQuery 19 │ 114.20ms │ 112.13ms │ no change │
│ QQuery 20 │ 125.56ms │ 132.27ms │ 1.05x slower │
│ QQuery 21 │ 259.30ms │ 263.83ms │ no change │
│ QQuery 22 │ 64.92ms │ 69.56ms │ 1.07x slower │
└──────────────┴───────────┴─────────────────────────┴───────────────┘
| if let Some(remaining) = group_index.checked_sub(n) { | ||
| self.emit_group_index_list_buffer.push(remaining); | ||
| } | ||
| self.map.retain(|(_exist_hash, group_idx_view)| { |
|
thanks for the reviews and tests 🙂 |
This seems quite big, is this reproducible? |
|
FYI @alamb |
I'll re-run In general, I found the timing accuracy of my test machine (GCP VM) is not great for <100ms queries. |
3 tasks
Hm, that's interesting! The results are not super reliable for me but mostly the noise is in the 5-7% range (running locally). |
|
Here is my next run (this time it seems to be faster) |
|
It's as if it pingpongs between two machine "versions". |
|
I found no real changes: |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Which issue does this PR close?
For #13433, but only parts of it.
Rationale for this change
Prepare
hashbrown0.15 upgrade.What changes are included in this PR?
HashTableAllocExtAre these changes tested?
Existing tests pass.
Are there any user-facing changes?
No.