Dynamic work scheduling in FileStream by alamb · Pull Request #21351 · apache/datafusion

alamb · 2026-04-03T16:53:51Z

Stacked on

Which issue does this PR close?

part of Introduce morsel-driven Parquet scan #20529
Closes Sketch out a Morselize API #20820

Rationale for this change

The whole point of this sequence of PRs is to enable dynamic work scheduling in the FileStream (so that if a task is done it can look at any remaining work)

What changes are included in this PR?

Add shared state to FileStream for siblings
Sibling streams put their file work into a shared queue when it can be reordered

Note there are a bunch of other things that are NOT included in this PR, including

Trying to limit concurrent IO (this PR has the same properties as main -- up to one outstanding IO per partition)
Trying to issue multiple IOs by the same partition (aka to interleave IO and CPU work)
Splitting files into smaller units (e.g. across row groups)

Are these changes tested?

Yes by existing functional and benchmark tests, as well as new functional tests

Are there any user-facing changes?

Yes, faster performance (TODO MEASURE)

alamb · 2026-04-06T11:46:42Z

run benchmarks

adriangbot · 2026-04-06T11:47:09Z

🤖 Benchmark running (GKE) | trigger
Instance: c4a-highmem-16 (12 vCPU / 65 GiB) | Linux bench-c4192066252-882-2j6n4 6.12.55+ #1 SMP Sun Feb 1 08:59:41 UTC 2026 aarch64 GNU/Linux

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Comparing alamb/reschedule_io (d5c4c5f) to a89b527 (merge-base) diff using: clickbench_partitioned
Results will be posted here when complete

File an issue against this benchmark runner

adriangbot · 2026-04-06T11:48:55Z

🤖 Benchmark running (GKE) | trigger
Instance: c4a-highmem-16 (12 vCPU / 65 GiB) | Linux bench-c4192066252-884-z8vp2 6.12.55+ #1 SMP Sun Feb 1 08:59:41 UTC 2026 aarch64 GNU/Linux

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Comparing alamb/reschedule_io (d5c4c5f) to a89b527 (merge-base) diff using: tpch
Results will be posted here when complete

File an issue against this benchmark runner

adriangbot · 2026-04-06T11:49:25Z

🤖 Benchmark running (GKE) | trigger
Instance: c4a-highmem-16 (12 vCPU / 65 GiB) | Linux bench-c4192066252-883-bxlr8 6.12.55+ #1 SMP Sun Feb 1 08:59:41 UTC 2026 aarch64 GNU/Linux

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Comparing alamb/reschedule_io (d5c4c5f) to a89b527 (merge-base) diff using: tpcds
Results will be posted here when complete

File an issue against this benchmark runner

adriangbot · 2026-04-06T11:57:39Z

🤖 Benchmark completed (GKE) | trigger

Instance: c4a-highmem-16 (12 vCPU / 65 GiB)

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Details

Comparing HEAD and alamb_reschedule_io
--------------------
Benchmark tpch_sf1.json
--------------------
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Query     ┃                           HEAD ┃            alamb_reschedule_io ┃    Change ┃
┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ QQuery 1  │ 45.06 / 46.37 ±1.20 / 47.97 ms │ 45.19 / 45.85 ±0.87 / 47.56 ms │ no change │
│ QQuery 2  │ 21.16 / 21.42 ±0.21 / 21.80 ms │ 21.04 / 21.24 ±0.16 / 21.47 ms │ no change │
│ QQuery 3  │ 31.52 / 31.84 ±0.24 / 32.15 ms │ 31.17 / 31.77 ±1.03 / 33.82 ms │ no change │
│ QQuery 4  │ 20.86 / 22.20 ±0.77 / 23.25 ms │ 20.95 / 21.37 ±0.50 / 22.21 ms │ no change │
│ QQuery 5  │ 48.24 / 49.23 ±1.12 / 51.03 ms │ 48.18 / 49.94 ±1.43 / 51.65 ms │ no change │
│ QQuery 6  │ 16.90 / 17.56 ±0.68 / 18.79 ms │ 17.02 / 17.73 ±0.65 / 18.72 ms │ no change │
│ QQuery 7  │ 55.90 / 56.78 ±1.01 / 58.63 ms │ 56.70 / 57.76 ±0.90 / 59.31 ms │ no change │
│ QQuery 8  │ 47.35 / 47.86 ±0.50 / 48.53 ms │ 47.82 / 48.64 ±0.69 / 49.90 ms │ no change │
│ QQuery 9  │ 55.18 / 56.74 ±1.82 / 60.21 ms │ 55.09 / 56.17 ±0.85 / 57.43 ms │ no change │
│ QQuery 10 │ 71.07 / 72.64 ±1.16 / 73.76 ms │ 70.40 / 71.62 ±0.63 / 72.12 ms │ no change │
│ QQuery 11 │ 14.20 / 14.44 ±0.36 / 15.13 ms │ 13.87 / 14.20 ±0.21 / 14.48 ms │ no change │
│ QQuery 12 │ 27.29 / 28.01 ±0.41 / 28.42 ms │ 27.94 / 28.18 ±0.21 / 28.57 ms │ no change │
│ QQuery 13 │ 39.10 / 40.51 ±1.08 / 42.33 ms │ 38.01 / 39.56 ±1.00 / 40.93 ms │ no change │
│ QQuery 14 │ 28.64 / 28.93 ±0.32 / 29.54 ms │ 28.17 / 28.61 ±0.32 / 29.01 ms │ no change │
│ QQuery 15 │ 33.31 / 34.60 ±1.14 / 36.30 ms │ 33.61 / 33.94 ±0.19 / 34.14 ms │ no change │
│ QQuery 16 │ 16.12 / 16.45 ±0.43 / 17.29 ms │ 15.72 / 16.13 ±0.27 / 16.39 ms │ no change │
│ QQuery 17 │ 74.82 / 75.48 ±0.56 / 76.15 ms │ 73.14 / 74.07 ±0.59 / 74.99 ms │ no change │
│ QQuery 18 │ 78.65 / 79.27 ±0.46 / 79.95 ms │ 77.47 / 79.19 ±1.39 / 80.72 ms │ no change │
│ QQuery 19 │ 37.84 / 38.47 ±0.41 / 38.86 ms │ 37.32 / 37.88 ±0.43 / 38.41 ms │ no change │
│ QQuery 20 │ 41.04 / 41.61 ±0.64 / 42.85 ms │ 39.67 / 40.66 ±0.81 / 41.62 ms │ no change │
│ QQuery 21 │ 64.13 / 65.54 ±1.47 / 68.28 ms │ 63.54 / 65.12 ±1.85 / 68.65 ms │ no change │
│ QQuery 22 │ 17.77 / 18.24 ±0.55 / 19.17 ms │ 17.46 / 18.02 ±0.49 / 18.94 ms │ no change │
└───────────┴────────────────────────────────┴────────────────────────────────┴───────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━┓
┃ Benchmark Summary                  ┃          ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━┩
│ Total Time (HEAD)                  │ 904.18ms │
│ Total Time (alamb_reschedule_io)   │ 897.63ms │
│ Average Time (HEAD)                │  41.10ms │
│ Average Time (alamb_reschedule_io) │  40.80ms │
│ Queries Faster                     │        0 │
│ Queries Slower                     │        0 │
│ Queries with No Change             │       22 │
│ Queries with Failure               │        0 │
└────────────────────────────────────┴──────────┘

Resource Usage

tpch — base (merge-base)

Metric	Value
Wall time	4.8s
Peak memory	4.1 GiB
Avg memory	3.6 GiB
CPU user	33.8s
CPU sys	2.6s
Peak spill	0 B

tpch — branch

Metric	Value
Wall time	4.7s
Peak memory	4.1 GiB
Avg memory	3.6 GiB
CPU user	33.8s
CPU sys	2.6s
Peak spill	0 B

File an issue against this benchmark runner

adriangbot · 2026-04-06T12:01:38Z

🤖 Benchmark completed (GKE) | trigger

Instance: c4a-highmem-16 (12 vCPU / 65 GiB)

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Details

Comparing HEAD and alamb_reschedule_io
--------------------
Benchmark clickbench_partitioned.json
--------------------
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query     ┃                                  HEAD ┃                   alamb_reschedule_io ┃        Change ┃
┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0  │          1.30 / 4.56 ±6.37 / 17.29 ms │          1.31 / 4.55 ±6.35 / 17.25 ms │     no change │
│ QQuery 1  │        14.65 / 15.05 ±0.29 / 15.56 ms │        12.00 / 12.42 ±0.27 / 12.83 ms │ +1.21x faster │
│ QQuery 2  │        44.23 / 44.61 ±0.42 / 45.39 ms │        35.97 / 36.54 ±0.31 / 36.90 ms │ +1.22x faster │
│ QQuery 3  │        43.10 / 44.46 ±1.35 / 46.69 ms │        34.41 / 35.17 ±0.70 / 36.12 ms │ +1.26x faster │
│ QQuery 4  │     293.78 / 305.01 ±7.65 / 316.85 ms │     260.16 / 263.55 ±4.78 / 272.96 ms │ +1.16x faster │
│ QQuery 5  │     348.16 / 352.47 ±4.23 / 358.82 ms │     302.86 / 308.72 ±5.56 / 319.27 ms │ +1.14x faster │
│ QQuery 6  │           5.80 / 6.57 ±0.63 / 7.63 ms │           6.62 / 7.86 ±0.78 / 8.75 ms │  1.20x slower │
│ QQuery 7  │        17.11 / 17.74 ±0.66 / 18.58 ms │        13.90 / 14.35 ±0.39 / 14.93 ms │ +1.24x faster │
│ QQuery 8  │     420.14 / 429.93 ±8.45 / 444.77 ms │    378.42 / 390.37 ±11.88 / 408.19 ms │ +1.10x faster │
│ QQuery 9  │     663.03 / 672.84 ±5.72 / 680.54 ms │    521.39 / 531.97 ±10.80 / 552.34 ms │ +1.26x faster │
│ QQuery 10 │        92.14 / 94.93 ±2.52 / 99.25 ms │        76.47 / 77.79 ±1.46 / 80.45 ms │ +1.22x faster │
│ QQuery 11 │     104.15 / 105.38 ±0.69 / 106.30 ms │        86.41 / 87.26 ±0.97 / 89.08 ms │ +1.21x faster │
│ QQuery 12 │     357.65 / 366.42 ±6.72 / 373.88 ms │     297.51 / 304.37 ±4.38 / 309.09 ms │ +1.20x faster │
│ QQuery 13 │     458.02 / 470.34 ±9.64 / 480.11 ms │    428.91 / 443.12 ±10.92 / 458.50 ms │ +1.06x faster │
│ QQuery 14 │     354.42 / 359.89 ±4.07 / 367.09 ms │     305.02 / 314.80 ±6.65 / 325.44 ms │ +1.14x faster │
│ QQuery 15 │    370.27 / 382.31 ±15.57 / 412.33 ms │    332.09 / 345.10 ±15.11 / 373.91 ms │ +1.11x faster │
│ QQuery 16 │    734.79 / 751.32 ±12.64 / 771.68 ms │    690.14 / 723.75 ±56.61 / 836.78 ms │     no change │
│ QQuery 17 │    721.23 / 731.36 ±10.62 / 751.20 ms │    686.92 / 718.61 ±57.67 / 833.81 ms │     no change │
│ QQuery 18 │ 1418.87 / 1491.07 ±39.56 / 1534.75 ms │ 1378.18 / 1409.22 ±49.85 / 1508.29 ms │ +1.06x faster │
│ QQuery 19 │        36.52 / 38.08 ±1.80 / 40.51 ms │      32.21 / 62.83 ±37.79 / 137.37 ms │  1.65x slower │
│ QQuery 20 │    723.14 / 740.27 ±16.11 / 760.99 ms │    513.72 / 527.72 ±10.71 / 544.27 ms │ +1.40x faster │
│ QQuery 21 │     767.80 / 774.94 ±6.76 / 787.66 ms │     597.68 / 606.11 ±7.93 / 618.51 ms │ +1.28x faster │
│ QQuery 22 │  1131.51 / 1137.57 ±7.04 / 1151.24 ms │ 1062.84 / 1072.76 ±10.36 / 1091.17 ms │ +1.06x faster │
│ QQuery 23 │ 3068.54 / 3099.60 ±19.20 / 3116.41 ms │ 3302.70 / 3323.50 ±16.22 / 3352.12 ms │  1.07x slower │
│ QQuery 24 │     101.01 / 104.87 ±2.81 / 109.76 ms │        43.34 / 46.80 ±3.25 / 52.18 ms │ +2.24x faster │
│ QQuery 25 │     140.64 / 141.29 ±0.67 / 142.40 ms │     114.94 / 116.41 ±1.24 / 118.08 ms │ +1.21x faster │
│ QQuery 26 │     102.97 / 104.39 ±0.80 / 105.19 ms │        43.89 / 45.52 ±1.57 / 47.70 ms │ +2.29x faster │
│ QQuery 27 │     852.42 / 859.56 ±7.14 / 871.93 ms │     673.53 / 683.34 ±5.19 / 688.03 ms │ +1.26x faster │
│ QQuery 28 │ 7750.35 / 7784.12 ±20.30 / 7804.81 ms │ 6987.03 / 7070.54 ±44.85 / 7114.20 ms │ +1.10x faster │
│ QQuery 29 │        52.98 / 55.46 ±4.12 / 63.62 ms │       43.51 / 55.84 ±19.75 / 95.00 ms │     no change │
│ QQuery 30 │     364.88 / 374.97 ±7.27 / 384.57 ms │    332.34 / 344.98 ±13.87 / 371.55 ms │ +1.09x faster │
│ QQuery 31 │    372.94 / 390.15 ±14.22 / 416.32 ms │    335.38 / 350.66 ±13.06 / 374.32 ms │ +1.11x faster │
│ QQuery 32 │ 1046.43 / 1088.88 ±41.29 / 1149.35 ms │ 1038.82 / 1060.23 ±30.52 / 1120.27 ms │     no change │
│ QQuery 33 │  1488.55 / 1499.96 ±7.93 / 1512.60 ms │  1459.04 / 1470.59 ±7.68 / 1480.30 ms │     no change │
│ QQuery 34 │ 1488.46 / 1500.84 ±11.87 / 1519.15 ms │ 1447.16 / 1472.97 ±18.26 / 1500.69 ms │     no change │
│ QQuery 35 │     402.87 / 405.09 ±2.05 / 408.76 ms │     322.39 / 325.27 ±4.63 / 334.50 ms │ +1.25x faster │
│ QQuery 36 │     117.00 / 122.22 ±2.88 / 125.83 ms │        70.69 / 72.64 ±1.35 / 74.20 ms │ +1.68x faster │
│ QQuery 37 │        50.38 / 51.37 ±0.73 / 52.43 ms │        38.61 / 39.88 ±0.92 / 41.10 ms │ +1.29x faster │
│ QQuery 38 │        76.42 / 77.64 ±0.93 / 78.65 ms │        40.72 / 42.41 ±1.03 / 43.59 ms │ +1.83x faster │
│ QQuery 39 │     222.54 / 226.06 ±2.44 / 229.01 ms │     130.19 / 134.34 ±3.95 / 140.15 ms │ +1.68x faster │
│ QQuery 40 │        22.89 / 26.76 ±2.41 / 30.20 ms │        17.75 / 20.33 ±2.11 / 22.87 ms │ +1.32x faster │
│ QQuery 41 │        19.87 / 21.12 ±0.68 / 21.88 ms │        15.20 / 15.73 ±0.36 / 16.07 ms │ +1.34x faster │
│ QQuery 42 │        20.10 / 20.26 ±0.15 / 20.52 ms │        13.64 / 14.18 ±0.41 / 14.70 ms │ +1.43x faster │
└───────────┴───────────────────────────────────────┴───────────────────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
┃ Benchmark Summary                  ┃            ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
│ Total Time (HEAD)                  │ 27291.72ms │
│ Total Time (alamb_reschedule_io)   │ 25005.09ms │
│ Average Time (HEAD)                │   634.69ms │
│ Average Time (alamb_reschedule_io) │   581.51ms │
│ Queries Faster                     │         33 │
│ Queries Slower                     │          3 │
│ Queries with No Change             │          7 │
│ Queries with Failure               │          0 │
└────────────────────────────────────┴────────────┘

Resource Usage

clickbench_partitioned — base (merge-base)

Metric	Value
Wall time	137.6s
Peak memory	40.4 GiB
Avg memory	31.6 GiB
CPU user	1299.0s
CPU sys	87.2s
Peak spill	0 B

clickbench_partitioned — branch

Metric	Value
Wall time	126.2s
Peak memory	41.5 GiB
Avg memory	28.2 GiB
CPU user	1313.5s
CPU sys	87.9s
Peak spill	0 B

File an issue against this benchmark runner

adriangbot · 2026-04-06T12:03:43Z

🤖 Benchmark completed (GKE) | trigger

Instance: c4a-highmem-16 (12 vCPU / 65 GiB)

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Details

Comparing HEAD and alamb_reschedule_io
--------------------
Benchmark tpcds_sf1.json
--------------------
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query     ┃                                     HEAD ┃                      alamb_reschedule_io ┃        Change ┃
┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 1  │           43.12 / 44.00 ±0.68 / 45.21 ms │           43.22 / 44.37 ±0.79 / 45.33 ms │     no change │
│ QQuery 2  │        146.67 / 148.42 ±1.12 / 150.03 ms │        148.90 / 149.92 ±1.03 / 151.89 ms │     no change │
│ QQuery 3  │        115.01 / 116.40 ±1.23 / 118.56 ms │        114.59 / 114.88 ±0.41 / 115.68 ms │     no change │
│ QQuery 4  │    1376.02 / 1397.11 ±14.40 / 1417.31 ms │    1359.03 / 1400.03 ±30.24 / 1436.09 ms │     no change │
│ QQuery 5  │        174.53 / 175.88 ±1.56 / 178.85 ms │        172.45 / 175.38 ±1.87 / 178.19 ms │     no change │
│ QQuery 6  │    1041.60 / 1072.21 ±18.23 / 1088.73 ms │    1014.21 / 1040.89 ±16.53 / 1056.87 ms │     no change │
│ QQuery 7  │        356.00 / 361.02 ±4.40 / 367.38 ms │        360.56 / 363.34 ±2.26 / 366.75 ms │     no change │
│ QQuery 8  │        116.46 / 119.17 ±1.64 / 120.94 ms │        116.58 / 118.80 ±1.50 / 121.19 ms │     no change │
│ QQuery 9  │        102.54 / 104.80 ±1.86 / 107.16 ms │        103.17 / 112.60 ±9.13 / 130.10 ms │  1.07x slower │
│ QQuery 10 │        106.47 / 108.68 ±1.57 / 111.19 ms │        107.35 / 109.62 ±1.29 / 110.87 ms │     no change │
│ QQuery 11 │     1017.30 / 1030.28 ±9.56 / 1045.64 ms │     1029.73 / 1038.84 ±6.32 / 1047.62 ms │     no change │
│ QQuery 12 │           46.50 / 49.16 ±1.66 / 51.24 ms │           45.35 / 46.76 ±1.35 / 48.83 ms │     no change │
│ QQuery 13 │        409.46 / 414.40 ±3.57 / 420.21 ms │        403.57 / 406.16 ±1.58 / 408.07 ms │     no change │
│ QQuery 14 │     1035.23 / 1043.91 ±7.54 / 1057.78 ms │     1022.47 / 1035.55 ±8.26 / 1047.32 ms │     no change │
│ QQuery 15 │           16.82 / 18.95 ±1.83 / 21.05 ms │           16.06 / 16.80 ±1.07 / 18.91 ms │ +1.13x faster │
│ QQuery 16 │           41.86 / 42.62 ±0.54 / 43.46 ms │           40.88 / 42.01 ±0.79 / 43.04 ms │     no change │
│ QQuery 17 │        248.37 / 250.00 ±1.28 / 252.11 ms │        242.26 / 243.55 ±1.16 / 245.07 ms │     no change │
│ QQuery 18 │        129.43 / 131.97 ±1.83 / 135.08 ms │        128.76 / 131.81 ±1.90 / 134.24 ms │     no change │
│ QQuery 19 │        158.94 / 160.00 ±0.63 / 160.74 ms │        154.99 / 157.20 ±1.78 / 159.56 ms │     no change │
│ QQuery 20 │           13.90 / 14.46 ±0.53 / 15.47 ms │           13.45 / 14.65 ±0.72 / 15.68 ms │     no change │
│ QQuery 21 │           20.11 / 20.64 ±0.35 / 21.18 ms │           19.66 / 20.36 ±0.41 / 20.86 ms │     no change │
│ QQuery 22 │       488.79 / 501.13 ±11.01 / 521.62 ms │        494.01 / 495.03 ±0.66 / 496.03 ms │     no change │
│ QQuery 23 │       913.21 / 926.85 ±15.26 / 955.75 ms │        931.04 / 946.14 ±7.56 / 950.57 ms │     no change │
│ QQuery 24 │        417.97 / 421.32 ±1.97 / 423.49 ms │        423.35 / 425.93 ±1.87 / 428.02 ms │     no change │
│ QQuery 25 │        354.25 / 358.67 ±3.16 / 362.28 ms │        356.10 / 361.03 ±4.15 / 366.81 ms │     no change │
│ QQuery 26 │           81.69 / 84.68 ±1.99 / 87.02 ms │           82.23 / 84.36 ±1.73 / 86.65 ms │     no change │
│ QQuery 27 │        352.86 / 354.78 ±1.43 / 356.76 ms │        352.79 / 353.97 ±1.13 / 355.51 ms │     no change │
│ QQuery 28 │        149.55 / 151.91 ±1.43 / 153.51 ms │        150.30 / 151.06 ±0.72 / 152.11 ms │     no change │
│ QQuery 29 │        302.91 / 307.91 ±4.28 / 313.65 ms │        298.49 / 301.16 ±2.04 / 303.14 ms │     no change │
│ QQuery 30 │           43.91 / 45.64 ±1.15 / 47.16 ms │           45.83 / 46.54 ±0.64 / 47.40 ms │     no change │
│ QQuery 31 │        172.17 / 174.06 ±1.57 / 176.66 ms │        171.07 / 174.95 ±2.63 / 177.67 ms │     no change │
│ QQuery 32 │           57.61 / 59.12 ±1.17 / 60.62 ms │           57.39 / 58.53 ±1.16 / 60.44 ms │     no change │
│ QQuery 33 │        141.29 / 143.41 ±1.30 / 144.98 ms │        140.68 / 142.93 ±1.38 / 144.65 ms │     no change │
│ QQuery 34 │        107.30 / 108.67 ±1.05 / 110.10 ms │        107.71 / 108.45 ±0.68 / 109.54 ms │     no change │
│ QQuery 35 │        109.58 / 110.44 ±0.68 / 111.45 ms │        107.95 / 109.68 ±1.37 / 111.80 ms │     no change │
│ QQuery 36 │        215.27 / 221.91 ±3.77 / 225.33 ms │        215.06 / 223.25 ±4.74 / 228.60 ms │     no change │
│ QQuery 37 │        176.93 / 178.60 ±1.03 / 179.87 ms │        179.06 / 180.26 ±0.73 / 181.29 ms │     no change │
│ QQuery 38 │           86.28 / 89.30 ±2.88 / 94.41 ms │           88.13 / 91.95 ±4.17 / 99.47 ms │     no change │
│ QQuery 39 │        124.26 / 128.48 ±2.51 / 130.67 ms │        125.63 / 130.74 ±2.85 / 133.35 ms │     no change │
│ QQuery 40 │        110.79 / 119.32 ±6.67 / 130.58 ms │        115.51 / 120.61 ±5.16 / 130.28 ms │     no change │
│ QQuery 41 │           14.57 / 15.65 ±1.21 / 17.77 ms │           14.95 / 16.20 ±0.84 / 17.51 ms │     no change │
│ QQuery 42 │        110.69 / 111.64 ±0.72 / 112.83 ms │        108.38 / 111.21 ±1.78 / 113.58 ms │     no change │
│ QQuery 43 │           84.21 / 84.90 ±0.55 / 85.90 ms │           85.42 / 86.51 ±0.61 / 87.18 ms │     no change │
│ QQuery 44 │           11.90 / 12.43 ±0.58 / 13.51 ms │           12.37 / 12.92 ±0.32 / 13.19 ms │     no change │
│ QQuery 45 │           52.36 / 53.77 ±1.00 / 55.15 ms │           52.99 / 55.09 ±1.36 / 56.92 ms │     no change │
│ QQuery 46 │        237.17 / 240.77 ±3.21 / 246.25 ms │        239.82 / 242.50 ±3.28 / 248.67 ms │     no change │
│ QQuery 47 │        717.43 / 734.62 ±9.54 / 743.43 ms │        769.43 / 776.23 ±7.89 / 790.18 ms │  1.06x slower │
│ QQuery 48 │        290.16 / 297.00 ±4.74 / 303.74 ms │        286.43 / 291.21 ±4.29 / 296.14 ms │     no change │
│ QQuery 49 │        255.68 / 257.75 ±2.15 / 260.49 ms │        256.11 / 260.01 ±2.32 / 263.01 ms │     no change │
│ QQuery 50 │        232.15 / 235.08 ±2.41 / 239.26 ms │        245.58 / 247.87 ±2.61 / 252.90 ms │  1.05x slower │
│ QQuery 51 │        183.55 / 185.74 ±1.59 / 188.15 ms │        185.16 / 188.17 ±3.36 / 194.12 ms │     no change │
│ QQuery 52 │        108.29 / 109.26 ±0.71 / 110.03 ms │        108.54 / 110.13 ±2.06 / 113.95 ms │     no change │
│ QQuery 53 │        103.17 / 103.66 ±0.56 / 104.74 ms │        105.58 / 106.07 ±0.34 / 106.47 ms │     no change │
│ QQuery 54 │        148.63 / 151.10 ±1.98 / 154.69 ms │        149.35 / 150.93 ±1.23 / 152.83 ms │     no change │
│ QQuery 55 │        108.67 / 110.22 ±1.47 / 112.54 ms │        107.78 / 109.85 ±1.48 / 111.87 ms │     no change │
│ QQuery 56 │        141.46 / 142.44 ±0.59 / 143.02 ms │        142.17 / 145.60 ±2.14 / 148.09 ms │     no change │
│ QQuery 57 │        176.40 / 177.53 ±0.87 / 178.76 ms │        178.92 / 180.36 ±1.06 / 181.51 ms │     no change │
│ QQuery 58 │        295.02 / 300.44 ±4.56 / 306.44 ms │        297.96 / 308.03 ±6.33 / 316.82 ms │     no change │
│ QQuery 59 │        202.33 / 203.60 ±0.91 / 204.48 ms │        201.04 / 206.54 ±3.80 / 211.22 ms │     no change │
│ QQuery 60 │        145.19 / 148.04 ±1.57 / 149.26 ms │        145.96 / 146.95 ±0.78 / 147.70 ms │     no change │
│ QQuery 61 │        174.61 / 176.07 ±1.24 / 177.70 ms │        176.49 / 178.48 ±1.52 / 180.68 ms │     no change │
│ QQuery 62 │       918.93 / 953.68 ±26.41 / 984.81 ms │      939.67 / 975.13 ±27.10 / 1008.41 ms │     no change │
│ QQuery 63 │        103.58 / 106.31 ±2.48 / 109.77 ms │        104.69 / 106.75 ±1.47 / 108.87 ms │     no change │
│ QQuery 64 │        702.98 / 709.00 ±3.89 / 715.09 ms │        720.21 / 726.39 ±3.91 / 731.61 ms │     no change │
│ QQuery 65 │        257.24 / 261.77 ±2.65 / 264.72 ms │        265.20 / 271.32 ±4.27 / 275.57 ms │     no change │
│ QQuery 66 │        252.42 / 262.22 ±8.07 / 275.44 ms │        248.14 / 264.05 ±9.95 / 273.51 ms │     no change │
│ QQuery 67 │       313.33 / 323.40 ±10.49 / 343.43 ms │        327.01 / 330.69 ±4.95 / 339.93 ms │     no change │
│ QQuery 68 │        284.84 / 288.35 ±3.85 / 295.45 ms │        288.23 / 291.42 ±1.98 / 293.83 ms │     no change │
│ QQuery 69 │        104.92 / 106.63 ±2.04 / 110.36 ms │        103.24 / 104.18 ±1.14 / 106.18 ms │     no change │
│ QQuery 70 │        349.72 / 360.42 ±9.08 / 375.03 ms │        343.36 / 351.75 ±8.05 / 363.16 ms │     no change │
│ QQuery 71 │        137.54 / 140.70 ±4.20 / 149.01 ms │        135.86 / 138.57 ±3.07 / 144.27 ms │     no change │
│ QQuery 72 │       714.88 / 731.04 ±10.93 / 744.12 ms │       745.76 / 754.26 ±10.62 / 774.46 ms │     no change │
│ QQuery 73 │        104.73 / 106.08 ±0.88 / 107.31 ms │        105.66 / 107.21 ±1.19 / 108.96 ms │     no change │
│ QQuery 74 │        620.08 / 627.06 ±3.69 / 629.62 ms │        642.17 / 653.51 ±6.56 / 660.02 ms │     no change │
│ QQuery 75 │        277.28 / 281.13 ±2.74 / 284.85 ms │        278.40 / 283.21 ±2.60 / 286.11 ms │     no change │
│ QQuery 76 │        133.98 / 136.68 ±2.00 / 139.26 ms │        135.06 / 136.83 ±1.53 / 138.66 ms │     no change │
│ QQuery 77 │        189.97 / 191.66 ±0.88 / 192.37 ms │        190.53 / 191.91 ±1.87 / 195.61 ms │     no change │
│ QQuery 78 │        353.38 / 357.95 ±3.79 / 363.58 ms │        353.68 / 363.19 ±5.47 / 370.50 ms │     no change │
│ QQuery 79 │        236.90 / 241.60 ±3.40 / 246.90 ms │        242.62 / 244.27 ±1.34 / 246.66 ms │     no change │
│ QQuery 80 │        327.02 / 332.03 ±3.57 / 335.68 ms │        330.90 / 335.00 ±2.49 / 338.33 ms │     no change │
│ QQuery 81 │           27.36 / 29.23 ±1.78 / 31.81 ms │           28.25 / 29.41 ±1.38 / 31.51 ms │     no change │
│ QQuery 82 │        200.38 / 203.09 ±1.53 / 204.76 ms │        201.03 / 204.17 ±2.42 / 207.86 ms │     no change │
│ QQuery 83 │           41.39 / 42.51 ±0.81 / 43.77 ms │           40.50 / 42.05 ±1.40 / 44.35 ms │     no change │
│ QQuery 84 │           49.28 / 49.77 ±0.32 / 50.20 ms │           48.54 / 49.97 ±1.33 / 52.12 ms │     no change │
│ QQuery 85 │        149.35 / 151.25 ±1.94 / 154.77 ms │        149.88 / 153.88 ±3.71 / 159.74 ms │     no change │
│ QQuery 86 │           39.69 / 40.41 ±0.67 / 41.59 ms │           41.36 / 42.23 ±0.53 / 43.00 ms │     no change │
│ QQuery 87 │           89.80 / 92.40 ±2.17 / 95.50 ms │          91.93 / 94.29 ±3.63 / 101.50 ms │     no change │
│ QQuery 88 │        101.20 / 102.30 ±0.82 / 103.49 ms │        102.71 / 103.88 ±1.05 / 105.48 ms │     no change │
│ QQuery 89 │        119.37 / 121.01 ±1.72 / 123.59 ms │        121.37 / 123.07 ±1.29 / 125.29 ms │     no change │
│ QQuery 90 │           24.44 / 25.01 ±0.58 / 25.87 ms │           24.56 / 24.94 ±0.30 / 25.45 ms │     no change │
│ QQuery 91 │           66.39 / 67.18 ±0.91 / 68.88 ms │           65.71 / 66.87 ±1.22 / 69.08 ms │     no change │
│ QQuery 92 │           57.53 / 58.25 ±0.44 / 58.91 ms │           58.82 / 59.79 ±0.83 / 61.02 ms │     no change │
│ QQuery 93 │        193.07 / 196.19 ±2.15 / 198.69 ms │        205.00 / 206.60 ±1.74 / 209.91 ms │  1.05x slower │
│ QQuery 94 │           61.94 / 63.07 ±1.23 / 65.03 ms │           63.05 / 63.58 ±0.54 / 64.35 ms │     no change │
│ QQuery 95 │        136.90 / 137.76 ±1.00 / 139.65 ms │        136.21 / 140.00 ±2.42 / 143.60 ms │     no change │
│ QQuery 96 │           71.31 / 74.38 ±1.61 / 75.75 ms │           76.17 / 76.93 ±0.42 / 77.41 ms │     no change │
│ QQuery 97 │        133.43 / 134.97 ±1.41 / 137.33 ms │        140.46 / 141.73 ±0.93 / 143.30 ms │  1.05x slower │
│ QQuery 98 │        157.38 / 158.84 ±1.50 / 161.12 ms │        160.97 / 163.27 ±1.85 / 165.85 ms │     no change │
│ QQuery 99 │ 10881.94 / 10923.58 ±27.98 / 10967.79 ms │ 10861.05 / 10897.33 ±32.70 / 10947.97 ms │     no change │
└───────────┴──────────────────────────────────────────┴──────────────────────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
┃ Benchmark Summary                  ┃            ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
│ Total Time (HEAD)                  │ 34350.87ms │
│ Total Time (alamb_reschedule_io)   │ 34534.56ms │
│ Average Time (HEAD)                │   346.98ms │
│ Average Time (alamb_reschedule_io) │   348.83ms │
│ Queries Faster                     │          1 │
│ Queries Slower                     │          5 │
│ Queries with No Change             │         93 │
│ Queries with Failure               │          0 │
└────────────────────────────────────┴────────────┘

Resource Usage

tpcds — base (merge-base)

Metric	Value
Wall time	172.1s
Peak memory	5.3 GiB
Avg memory	4.4 GiB
CPU user	276.8s
CPU sys	18.4s
Peak spill	0 B

tpcds — branch

Metric	Value
Wall time	173.0s
Peak memory	5.6 GiB
Avg memory	4.6 GiB
CPU user	279.0s
CPU sys	18.9s
Peak spill	0 B

File an issue against this benchmark runner

Dandandan · 2026-04-06T12:05:34Z

run benchmark tpch10

adriangbot · 2026-04-06T12:07:33Z

🤖 Benchmark running (GKE) | trigger
Instance: c4a-highmem-16 (12 vCPU / 65 GiB) | Linux bench-c4192141470-886-n5lzk 6.12.55+ #1 SMP Sun Feb 1 08:59:41 UTC 2026 aarch64 GNU/Linux

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Comparing alamb/reschedule_io (d5c4c5f) to a89b527 (merge-base) diff using: tpch10
Results will be posted here when complete

File an issue against this benchmark runner

Dandandan · 2026-04-06T12:14:20Z

🤖 Benchmark completed (GKE) | trigger

Instance: c4a-highmem-16 (12 vCPU / 65 GiB)

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Details

Comparing HEAD and alamb_reschedule_io
--------------------
Benchmark clickbench_partitioned.json
--------------------
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query     ┃                                  HEAD ┃                   alamb_reschedule_io ┃        Change ┃
┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0  │          1.30 / 4.56 ±6.37 / 17.29 ms │          1.31 / 4.55 ±6.35 / 17.25 ms │     no change │
│ QQuery 1  │        14.65 / 15.05 ±0.29 / 15.56 ms │        12.00 / 12.42 ±0.27 / 12.83 ms │ +1.21x faster │
│ QQuery 2  │        44.23 / 44.61 ±0.42 / 45.39 ms │        35.97 / 36.54 ±0.31 / 36.90 ms │ +1.22x faster │
│ QQuery 3  │        43.10 / 44.46 ±1.35 / 46.69 ms │        34.41 / 35.17 ±0.70 / 36.12 ms │ +1.26x faster │
│ QQuery 4  │     293.78 / 305.01 ±7.65 / 316.85 ms │     260.16 / 263.55 ±4.78 / 272.96 ms │ +1.16x faster │
│ QQuery 5  │     348.16 / 352.47 ±4.23 / 358.82 ms │     302.86 / 308.72 ±5.56 / 319.27 ms │ +1.14x faster │
│ QQuery 6  │           5.80 / 6.57 ±0.63 / 7.63 ms │           6.62 / 7.86 ±0.78 / 8.75 ms │  1.20x slower │
│ QQuery 7  │        17.11 / 17.74 ±0.66 / 18.58 ms │        13.90 / 14.35 ±0.39 / 14.93 ms │ +1.24x faster │
│ QQuery 8  │     420.14 / 429.93 ±8.45 / 444.77 ms │    378.42 / 390.37 ±11.88 / 408.19 ms │ +1.10x faster │
│ QQuery 9  │     663.03 / 672.84 ±5.72 / 680.54 ms │    521.39 / 531.97 ±10.80 / 552.34 ms │ +1.26x faster │
│ QQuery 10 │        92.14 / 94.93 ±2.52 / 99.25 ms │        76.47 / 77.79 ±1.46 / 80.45 ms │ +1.22x faster │
│ QQuery 11 │     104.15 / 105.38 ±0.69 / 106.30 ms │        86.41 / 87.26 ±0.97 / 89.08 ms │ +1.21x faster │
│ QQuery 12 │     357.65 / 366.42 ±6.72 / 373.88 ms │     297.51 / 304.37 ±4.38 / 309.09 ms │ +1.20x faster │
│ QQuery 13 │     458.02 / 470.34 ±9.64 / 480.11 ms │    428.91 / 443.12 ±10.92 / 458.50 ms │ +1.06x faster │
│ QQuery 14 │     354.42 / 359.89 ±4.07 / 367.09 ms │     305.02 / 314.80 ±6.65 / 325.44 ms │ +1.14x faster │
│ QQuery 15 │    370.27 / 382.31 ±15.57 / 412.33 ms │    332.09 / 345.10 ±15.11 / 373.91 ms │ +1.11x faster │
│ QQuery 16 │    734.79 / 751.32 ±12.64 / 771.68 ms │    690.14 / 723.75 ±56.61 / 836.78 ms │     no change │
│ QQuery 17 │    721.23 / 731.36 ±10.62 / 751.20 ms │    686.92 / 718.61 ±57.67 / 833.81 ms │     no change │
│ QQuery 18 │ 1418.87 / 1491.07 ±39.56 / 1534.75 ms │ 1378.18 / 1409.22 ±49.85 / 1508.29 ms │ +1.06x faster │
│ QQuery 19 │        36.52 / 38.08 ±1.80 / 40.51 ms │      32.21 / 62.83 ±37.79 / 137.37 ms │  1.65x slower │
│ QQuery 20 │    723.14 / 740.27 ±16.11 / 760.99 ms │    513.72 / 527.72 ±10.71 / 544.27 ms │ +1.40x faster │
│ QQuery 21 │     767.80 / 774.94 ±6.76 / 787.66 ms │     597.68 / 606.11 ±7.93 / 618.51 ms │ +1.28x faster │
│ QQuery 22 │  1131.51 / 1137.57 ±7.04 / 1151.24 ms │ 1062.84 / 1072.76 ±10.36 / 1091.17 ms │ +1.06x faster │
│ QQuery 23 │ 3068.54 / 3099.60 ±19.20 / 3116.41 ms │ 3302.70 / 3323.50 ±16.22 / 3352.12 ms │  1.07x slower │
│ QQuery 24 │     101.01 / 104.87 ±2.81 / 109.76 ms │        43.34 / 46.80 ±3.25 / 52.18 ms │ +2.24x faster │
│ QQuery 25 │     140.64 / 141.29 ±0.67 / 142.40 ms │     114.94 / 116.41 ±1.24 / 118.08 ms │ +1.21x faster │
│ QQuery 26 │     102.97 / 104.39 ±0.80 / 105.19 ms │        43.89 / 45.52 ±1.57 / 47.70 ms │ +2.29x faster │
│ QQuery 27 │     852.42 / 859.56 ±7.14 / 871.93 ms │     673.53 / 683.34 ±5.19 / 688.03 ms │ +1.26x faster │
│ QQuery 28 │ 7750.35 / 7784.12 ±20.30 / 7804.81 ms │ 6987.03 / 7070.54 ±44.85 / 7114.20 ms │ +1.10x faster │
│ QQuery 29 │        52.98 / 55.46 ±4.12 / 63.62 ms │       43.51 / 55.84 ±19.75 / 95.00 ms │     no change │
│ QQuery 30 │     364.88 / 374.97 ±7.27 / 384.57 ms │    332.34 / 344.98 ±13.87 / 371.55 ms │ +1.09x faster │
│ QQuery 31 │    372.94 / 390.15 ±14.22 / 416.32 ms │    335.38 / 350.66 ±13.06 / 374.32 ms │ +1.11x faster │
│ QQuery 32 │ 1046.43 / 1088.88 ±41.29 / 1149.35 ms │ 1038.82 / 1060.23 ±30.52 / 1120.27 ms │     no change │
│ QQuery 33 │  1488.55 / 1499.96 ±7.93 / 1512.60 ms │  1459.04 / 1470.59 ±7.68 / 1480.30 ms │     no change │
│ QQuery 34 │ 1488.46 / 1500.84 ±11.87 / 1519.15 ms │ 1447.16 / 1472.97 ±18.26 / 1500.69 ms │     no change │
│ QQuery 35 │     402.87 / 405.09 ±2.05 / 408.76 ms │     322.39 / 325.27 ±4.63 / 334.50 ms │ +1.25x faster │
│ QQuery 36 │     117.00 / 122.22 ±2.88 / 125.83 ms │        70.69 / 72.64 ±1.35 / 74.20 ms │ +1.68x faster │
│ QQuery 37 │        50.38 / 51.37 ±0.73 / 52.43 ms │        38.61 / 39.88 ±0.92 / 41.10 ms │ +1.29x faster │
│ QQuery 38 │        76.42 / 77.64 ±0.93 / 78.65 ms │        40.72 / 42.41 ±1.03 / 43.59 ms │ +1.83x faster │
│ QQuery 39 │     222.54 / 226.06 ±2.44 / 229.01 ms │     130.19 / 134.34 ±3.95 / 140.15 ms │ +1.68x faster │
│ QQuery 40 │        22.89 / 26.76 ±2.41 / 30.20 ms │        17.75 / 20.33 ±2.11 / 22.87 ms │ +1.32x faster │
│ QQuery 41 │        19.87 / 21.12 ±0.68 / 21.88 ms │        15.20 / 15.73 ±0.36 / 16.07 ms │ +1.34x faster │
│ QQuery 42 │        20.10 / 20.26 ±0.15 / 20.52 ms │        13.64 / 14.18 ±0.41 / 14.70 ms │ +1.43x faster │
└───────────┴───────────────────────────────────────┴───────────────────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
┃ Benchmark Summary                  ┃            ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
│ Total Time (HEAD)                  │ 27291.72ms │
│ Total Time (alamb_reschedule_io)   │ 25005.09ms │
│ Average Time (HEAD)                │   634.69ms │
│ Average Time (alamb_reschedule_io) │   581.51ms │
│ Queries Faster                     │         33 │
│ Queries Slower                     │          3 │
│ Queries with No Change             │          7 │
│ Queries with Failure               │          0 │
└────────────────────────────────────┴────────────┘

Resource Usage
clickbench_partitioned — base (merge-base)

Metric Value
Wall time 137.6s
Peak memory 40.4 GiB
Avg memory 31.6 GiB
CPU user 1299.0s
CPU sys 87.2s
Peak spill 0 B
clickbench_partitioned — branch

Metric Value
Wall time 126.2s
Peak memory 41.5 GiB
Avg memory 28.2 GiB
CPU user 1313.5s
CPU sys 87.9s
Peak spill 0 B
File an issue against this benchmark runner

It's happening!

adriangbot · 2026-04-06T12:18:01Z

🤖 Benchmark completed (GKE) | trigger

Instance: c4a-highmem-16 (12 vCPU / 65 GiB)

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Details

Comparing HEAD and alamb_reschedule_io
--------------------
Benchmark tpch_sf10.json
--------------------
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Query     ┃                               HEAD ┃                alamb_reschedule_io ┃    Change ┃
┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ QQuery 1  │  367.56 / 368.83 ±0.76 / 369.56 ms │  369.02 / 370.15 ±1.19 / 372.08 ms │ no change │
│ QQuery 2  │  132.62 / 138.70 ±3.65 / 143.49 ms │  134.99 / 141.26 ±3.88 / 146.92 ms │ no change │
│ QQuery 3  │  291.01 / 293.95 ±2.85 / 297.43 ms │  294.48 / 297.35 ±2.14 / 300.49 ms │ no change │
│ QQuery 4  │  151.52 / 154.83 ±2.07 / 157.31 ms │  156.30 / 158.14 ±2.27 / 162.46 ms │ no change │
│ QQuery 5  │  429.36 / 435.55 ±3.53 / 439.77 ms │  429.90 / 441.41 ±8.33 / 454.76 ms │ no change │
│ QQuery 6  │  130.19 / 132.38 ±2.30 / 136.82 ms │  131.19 / 132.31 ±0.68 / 133.10 ms │ no change │
│ QQuery 7  │  564.90 / 568.21 ±2.40 / 571.43 ms │  558.48 / 563.63 ±3.76 / 570.08 ms │ no change │
│ QQuery 8  │  478.71 / 483.97 ±3.37 / 488.66 ms │  476.42 / 479.71 ±3.47 / 486.39 ms │ no change │
│ QQuery 9  │ 689.29 / 697.26 ±11.52 / 719.80 ms │  679.37 / 686.89 ±6.33 / 695.71 ms │ no change │
│ QQuery 10 │  331.39 / 340.83 ±8.03 / 351.59 ms │  340.63 / 347.80 ±7.76 / 362.65 ms │ no change │
│ QQuery 11 │  108.51 / 112.99 ±2.95 / 117.00 ms │  106.47 / 110.01 ±2.52 / 113.82 ms │ no change │
│ QQuery 12 │  208.77 / 211.38 ±2.29 / 214.62 ms │  204.10 / 205.69 ±1.49 / 207.69 ms │ no change │
│ QQuery 13 │  316.53 / 323.51 ±8.53 / 337.25 ms │  306.86 / 314.44 ±5.82 / 320.40 ms │ no change │
│ QQuery 14 │  183.04 / 184.41 ±0.96 / 185.69 ms │  180.98 / 182.53 ±1.56 / 184.82 ms │ no change │
│ QQuery 15 │  328.25 / 331.09 ±1.52 / 332.39 ms │  327.88 / 331.16 ±3.62 / 337.95 ms │ no change │
│ QQuery 16 │     89.23 / 91.22 ±2.18 / 95.24 ms │     85.59 / 87.91 ±2.48 / 91.19 ms │ no change │
│ QQuery 17 │  759.88 / 763.77 ±4.86 / 772.78 ms │  751.91 / 759.75 ±4.38 / 765.50 ms │ no change │
│ QQuery 18 │ 870.67 / 888.82 ±13.76 / 910.28 ms │ 833.87 / 861.78 ±15.75 / 878.69 ms │ no change │
│ QQuery 19 │  268.76 / 273.75 ±6.64 / 286.21 ms │  265.12 / 270.89 ±5.23 / 278.44 ms │ no change │
│ QQuery 20 │  323.26 / 329.66 ±6.87 / 341.52 ms │  320.28 / 331.29 ±9.53 / 348.04 ms │ no change │
│ QQuery 21 │ 842.38 / 853.77 ±10.81 / 872.98 ms │ 839.00 / 853.69 ±15.75 / 884.24 ms │ no change │
│ QQuery 22 │     79.93 / 83.07 ±3.27 / 88.99 ms │     80.07 / 82.33 ±1.90 / 84.84 ms │ no change │
└───────────┴────────────────────────────────────┴────────────────────────────────────┴───────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Benchmark Summary                  ┃           ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ Total Time (HEAD)                  │ 8061.96ms │
│ Total Time (alamb_reschedule_io)   │ 8010.12ms │
│ Average Time (HEAD)                │  366.45ms │
│ Average Time (alamb_reschedule_io) │  364.10ms │
│ Queries Faster                     │         0 │
│ Queries Slower                     │         0 │
│ Queries with No Change             │        22 │
│ Queries with Failure               │         0 │
└────────────────────────────────────┴───────────┘

Resource Usage

tpch10 — base (merge-base)

Metric	Value
Wall time	40.7s
Peak memory	10.0 GiB
Avg memory	7.7 GiB
CPU user	427.0s
CPU sys	26.3s
Peak spill	0 B

tpch10 — branch

Metric	Value
Wall time	40.4s
Peak memory	10.0 GiB
Avg memory	7.5 GiB
CPU user	424.7s
CPU sys	26.1s
Peak spill	0 B

File an issue against this benchmark runner

alamb · 2026-04-06T12:45:11Z

It's happening!

Yes! Finally -- and no regressions this time!

I have a pile of stacked PRs:

Now that I have some evidence that this PR make them faster, I'll go back and get them ready to review

alamb · 2026-04-06T13:10:29Z

…er` (#21327) ~(Draft until I am sure I can use this API to make FileStream behave better)~ ## Which issue does this PR close? - part of #20529 - Needed for #21351 - Broken out of #20820 - Closes #21427 ## Rationale for this change I can get 10% faster on many ClickBench queries by reordeirng files at runtime. You can see it all working together here: #21351 To do do, I need to rework the FileStream so that it can reorder operations at runtime. Eventually that will include both CPU and IO. This PR is a step in the direction by introducing the main Morsel API and implementing it for Parquet. The next PR (#21342) rewrites FileStream in terms of the Morsel API ## What changes are included in this PR? 1. Add proposed `Morsel` API 2. Rewrite Parquet opener in terms of that API 3. Add an adapter layer (back to FileOpener, so I don't have to rewrite FileStream in the same PR) My next PR will rewrite the FileStream to use the Morsel API ## Are these changes tested? Yes by existing CI. I will work on adding additional tests for just Parquet opener in a follow on PR ## Are there any user-facing changes? No

github-actions bot added the datasource Changes to the datasource crate label Apr 3, 2026

alamb force-pushed the alamb/reschedule_io branch from 3346af7 to 9789b9f Compare April 6, 2026 11:01

alamb added 3 commits April 6, 2026 07:02

Introduce Morselizer API

f3e1303

Rewrite FileStream in terms of Morselize API

73351c3

Add Dynamic work scheduling in FileStream

d5c4c5f

alamb force-pushed the alamb/reschedule_io branch from 9789b9f to d5c4c5f Compare April 6, 2026 11:04

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alamb mentioned this pull request Apr 6, 2026

Rewrite FileStream in terms of Morsel API #21342

Draft

This was referenced Apr 6, 2026

Introduce Morselizer API, rewrite ParquetOpener to ParquetMorselizer #21327

Merged

Sketch out a Morselize API #20820

Closed

Introduce morsel-driven Parquet scan #20529

Open

More tests

0c7bab3

simplify tests

1649c65

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alamb commented Apr 3, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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alamb commented Apr 3, 2026 •

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