nki(reverse_array): NKI (Trainium) implementation - #298
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bowencui123 wants to merge 7 commits into
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Split out of the consolidated NKI branch cecilia/feature/nki-vector-add (nki-all-operators, PR #259) so each operator can be reviewed on its own. Supersedes PR #187 (older per-operator branch). Co-Authored-By: Cecilia123li <68335867+Cecilia123li@users.noreply.github.com> Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012Q38kGmXvyoeM1qtCbheSL
This was referenced Aug 29, 2026
Tunables mirror the Triton search space (`BLOCK_SIZE`); defaults are the previous constants, so autotune=False is unchanged. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012Q38kGmXvyoeM1qtCbheSL
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014pR5BQjiMBmoBxzSURViRA
Merges NKI backend timing into results/csv/reverse_array_default.csv, run against this branch's impl_nki.py on trn2.3xlarge with the LNC2 execution contract (NEURON_LOGICAL_NC_CONFIG=2, NEURON_RT_NUM_CORES=1, NEURON_CC_FLAGS="--target trn2 --lnc 2"). All cases pass correctness verification. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AQseF7nyesBh8KZAp8g7Cm
# Conflicts: # results/csv/reverse_array_autotune.csv # results/csv/reverse_array_default.csv
…reverse, per-row stores, in-kernel tails); XLA torch baseline gather<=8M / flip; rerun benchmarks Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01ScXYNjrrKGgDUVNHxv7HJt
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NKI (AWS Trainium) implementation of reverse_array, split out of the consolidated NKI branch
cecilia/feature/nki-vector-add(nki-all-operators, #259) so each operator can be reviewed independently. Supersedes #187 (older per-operator branch: legacyneuronxcc.nkiimports; this is the migratedimport nkiversion).Files: A benchmarks/operators/reverse_array/impl_nki.py
Status: imports and exposes run()/get_last_config() on trn2 (nki 0.6.0); not individually re-benchmarked in this split
Implementation by @Cecilia123li. Timing/identity infrastructure: #261; Trainium peak/roofline infra: #262.
🤖 Generated with Claude Code
https://claude.ai/code/session_012Q38kGmXvyoeM1qtCbheSL
Autotune (b3046c9)
block_size(free-dim tile per 128-partition block)BLOCK_SIZEautotune=Falsekeeps the previous constants (default numbers unchanged). Validation on trn2, case 0 (default run + autotune code path with the candidate timer stubbed — no sweep;--autotuneruns a real sweep):