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MoE expert parallel execution backward

34 eligible runs
moe

Backward pass for MoE expert parallel execution. Computes gradients for hidden_states, topk_weights, gate_weights, up_weights, and down_weights through the SwiGLU MLP expert computation with token dispatch and weighted aggregation.

Fastest reported
12.6msmean · 54% of SOL
imec.AILabsLicense unknown · unknown

Reported evidence · last observed 2026-07-22. Reported by source; not independently reproduced. No public source. License unknown.

No public sourceRun detail →

Current records

Workloadsuite of 16 cases · mean latencyhidden_size = 4096 · n_routed_experts = 256 · num_experts_per_tok = 8 · moe_intermediate_size = 204816 cases

Not measured on H100 for this workload. Challenges →

Source-native comparison · GPU NVIDIA B200 · Workload suite of 16 cases · mean latency · Protocol SOL-ExecBench evaluation stack v1.1 · mean · 25 results · last observed 2026-08-21Record history →
#
Implementation
Latency
vs #1
Trust
Observed
1
12.6ms54% SOL
1.00×
Reported · license unknown · no source
2026-07-22

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
2
12.7ms53% SOL
1.00×
Reported · license unknown · no source
2026-07-17

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
3
12.7ms53% SOL
1.00×
Reported · license unknown · no source
2026-07-10

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
4
12.8ms53% SOL
1.01×
Reported · license unknown · no source
2026-07-22

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
5
12.8ms53% SOL
1.01×
Reported · license unknown · no source
2026-07-22

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
6
12.8ms53% SOL
1.01×
Reported · license unknown · no source
2026-07-22

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
7
13.0ms53% SOL
1.03×
Reported · license unknown · no source
2026-07-17

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
8
13.1ms52% SOL
1.04×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
9
13.1ms52% SOL
1.04×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
10
13.6ms51% SOL
1.08×
Reported · license unknown · no source
2026-07-10

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
11
14.2ms50% SOL
1.12×
Reported · license unknown · no source
2026-08-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
12
14.2ms50% SOL
1.13×
Reported · license unknown · no source
2026-08-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
13
14.3ms50% SOL
1.13×
Reported · license unknown · no source
2026-08-20

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
14
14.4ms50% SOL
1.14×
Reported · license unknown · no source
2026-08-17

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
15
14.6ms49% SOL
1.15×
Reported · license unknown · no source
2026-08-15

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
16
16.3ms46% SOL
1.29×
Reported · license unknown · no source
2026-07-10

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
17
21.6ms39% SOL
1.71×
Reported · license unknown · no source
2026-08-08

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
18
21.7ms38% SOL
1.72×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
19
21.9ms38% SOL
1.73×
Reported · license unknown · no source
2026-07-25

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
20
21.9ms38% SOL
1.73×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
21
21.9ms38% SOL
1.74×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
22
21.9ms38% SOL
1.74×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
23
22.3ms38% SOL
1.77×
Reported · license unknown · no source
2026-07-21

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
24
38.8ms25% SOL
3.08×
Reported · license unknown · no source
2026-07-10

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →
25
440.0ms3% SOL
34.87×
Reported · license unknown · no source
2026-08-13

Measured exactly what you asked. Reported by source; not independently reproduced.

no sourcelicense unknownno install recipeRun detail →

Implementations

Implementation
Runtime
Best latency
Evidence
Availability
unknown
12.7ms
1.01×
Reported
license unknown · no source
unknown
12.7ms
1.01×
Reported
license unknown · no source
unknown
13.0ms
1.03×
Reported
license unknown · no source
unknown
13.5ms
1.07×
Reported
license unknown · no source
unknown
14.2ms
1.12×
Reported
license unknown · no source
unknown
16.0ms
1.27×
Reported
license unknown · no source
unknown
33.0ms
2.62×
Reported
license unknown · no source
unknown
12.8ms
1.01×
Reported
license unknown · no source
Show all 34 implementations ›
unknown
12.8ms
1.01×
Reported
license unknown · no source
unknown
12.8ms
1.01×
Reported
license unknown · no source
unknown
12.8ms
1.02×
Reported
license unknown · no source
unknown
13.1ms
1.04×
Reported
license unknown · no source
unknown
13.1ms
1.04×
Reported
license unknown · no source
unknown
13.6ms
1.08×
Reported
license unknown · no source
unknown
14.2ms
1.13×
Reported
license unknown · no source
unknown
14.3ms
1.13×
Reported
license unknown · no source
unknown
14.4ms
1.14×
Reported
license unknown · no source
unknown
14.6ms
1.15×
Reported
license unknown · no source
unknown
14.8ms
1.17×
Reported
license unknown · no source
unknown
16.3ms
1.29×
Reported
license unknown · no source
unknown
21.6ms
1.71×
Reported
license unknown · no source
unknown
21.7ms
1.72×
Reported
license unknown · no source
unknown
21.9ms
1.73×
Reported
license unknown · no source
unknown
21.9ms
1.73×
Reported
license unknown · no source
unknown
21.9ms
1.74×
Reported
license unknown · no source
unknown
21.9ms
1.74×
Reported
license unknown · no source
unknown
22.3ms
1.77×
Reported
license unknown · no source
unknown
38.8ms
3.08×
Reported
license unknown · no source
unknown
58.8ms
4.66×
Reported
license unknown · no source
unknown
440.0ms
34.87×
Reported
license unknown · no source
unknown
1.61s
127.51×
Reported
license unknown · no source
unknown
12.6ms
1.00×
Reported
license unknown · no source
unknown
12.7ms
1.00×
Reported
license unknown · no source
unknown
12.7ms
1.00×
Reported
license unknown · no source

Semantics

Inputs and outputs
grad_outputfp32 [num_tokens, hidden_size]
hidden_statesfp32 [num_tokens, hidden_size]
topk_indicesint64 [num_tokens, num_experts_per_tok]
topk_weightsfp32 [num_tokens, num_experts_per_tok]
gate_weightsfp32 [n_routed_experts, moe_intermediate_size, hidden_size]
up_weightsfp32 [n_routed_experts, moe_intermediate_size, hidden_size]
down_weightsfp32 [n_routed_experts, hidden_size, moe_intermediate_size]
grad_hidden_statesfp32 [num_tokens, hidden_size]
grad_topk_weightsfp32 [num_tokens, num_experts_per_tok]
grad_gate_weightsfp32 [n_routed_experts, moe_intermediate_size, hidden_size]
grad_up_weightsfp32 [n_routed_experts, moe_intermediate_size, hidden_size]
grad_down_weightsfp32 [n_routed_experts, hidden_size, moe_intermediate_size]
Axes and behavior
num_tokensvariable
hidden_sizeconstant = 4096
n_routed_expertsconstant = 256
num_experts_per_tokconstant = 8
moe_intermediate_sizeconstant = 2048
determinismunspecified
constraintsNo mutation or aliasing
Identity
alias025_moe_expert_parallel_execution_backwardmodelmimo-v2-flashsha256045e8630b034…
Sources: NVIDIA SOL-ExecBench (2026-08-21)last observed 2026-08-21How records are decidedJSON