fix: benchmark reporting — timeout detection, cached builds#330
fix: benchmark reporting — timeout detection, cached builds#330strawgate wants to merge 3 commits into
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New structural.rs module implementing the simdjson two-stage pattern: - Stage 1 (SIMD): find_structural_chars_scalar detects 10 chars - Stage 2 (scalar): StreamingClassifier processes bitmasks per-block Key types: - RawBlockMasks: 10 u64 bitmasks from SIMD detection (stack-local) - ProcessedBlock: escape-aware, string-masked bitmasks - StreamingClassifier: carries only 2 u64s between blocks Includes 6 unit tests (string masking, escapes, cross-block carry, tail blocks) and 5 Kani proof harnesses (correctness, consistency, no-panic, tail masking, string exclusion). Makes compute_real_quotes and prefix_xor pub in chunk_classify.rs for reuse. ChunkIndex is preserved — migration happens in next step. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add NEON, AVX2, and SSE2 backends for find_structural_chars(), detecting all 10 structural characters in one SIMD pass. Each backend loads 64 bytes once, then runs 10 comparisons against the loaded data — same pattern as existing chunk_classify.rs but extended from 2 to 10 characters. New tests: - simd_matches_scalar: 6 representative inputs verified identical - simd_matches_scalar_random: 100 pseudo-random blocks verified - end_to_end_ndjson_line_extraction: full buffer → line ranges - end_to_end_structural_field_counting: comma/colon counting with string-interior masking (comma in "hello, world" masked) 10 tests total, all passing. Clippy clean. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Caution Review failedThe pull request is closed. ℹ️ Recent review info⚙️ Run configurationConfiguration used: Organization UI Review profile: ASSERTIVE Plan: Pro Run ID: 📒 Files selected for processing (1)
WalkthroughThis PR introduces timeout tracking to the competitive benchmarking runner and refactors JSON/NDJSON structural character detection into a new public module. The Possibly related PRs
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The error-path BenchResult in main.rs was missing the new timed_out field. Revert bench.yml caching — Swatinem/rust-cache already handles incremental compilation, the extra actions/cache layer was marginal complexity for little gain. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Actionable comments posted: 5
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In @.github/workflows/bench.yml:
- Around line 50-55: The cache key for the "Check binary cache" step (id:
bin-cache, uses: actions/cache@v4) misses build-affecting inputs; update its key
to include .cargo/config.toml, the root Cargo.toml, rust-toolchain.toml (if
present), and the RUSTFLAGS value, and make the source glob match nested
workspace members (e.g., use crates/**/src/**). Also add a stable version prefix
(e.g., v1-) so you can manually bust the cache; ensure the key expression hashes
those files and the RUSTFLAGS env var so changes to any of them invalidate the
cache.
In `@crates/logfwd-competitive-bench/src/runner.rs`:
- Around line 598-599: The new wait_blackhole_done signature returns a (u64,
bool) but callers in run_agent_perf and run_agent_dhat still ignore the boolean;
update the call sites to explicitly destructure both return values (e.g., let
(_lines_done, _timed_out) = wait_blackhole_done(...)) so the timeout flag is
clearly discarded; locate and change the calls inside functions run_agent_perf
and run_agent_dhat where wait_blackhole_done(...) is invoked to use tuple
destructuring for clarity.
In `@crates/logfwd-core/src/chunk_classify.rs`:
- Around line 192-194: Add a Rust doc comment describing the purpose,
parameters, and return value for the public function
compute_real_quotes(quote_bits: u64, bs_bits: u64, prev_odd_backslash: &mut u64)
so it meets the public-API guideline (explain what quote_bits and bs_bits
represent, how prev_odd_backslash is updated, and what the returned u64
encodes); then remove the now-stale #[allow(dead_code)] attribute above
compute_real_quotes since the function is used publicly (structural.rs) and no
longer dead code.
- Around line 316-318: The public function prefix_xor currently is missing a doc
comment and keeps a stale #[allow(dead_code)] attribute; remove the
#[allow(dead_code)] and add a concise doc comment above pub fn prefix_xor(mut
bitmask: u64) -> u64 describing what the function does (e.g., compute an
xor-prefix over the lower 64 bits, its input and return value semantics, and any
panics or edge cases), mirroring the documentation style used for
compute_real_quotes to satisfy the public API doc requirement.
In `@crates/logfwd-core/src/structural.rs`:
- Around line 232-245: The movemask16 implementation in this file duplicates
chunk_classify::aarch64_impl::movemask16; extract the common NEON logic into a
shared function (e.g., simd_movemask16) in a new or existing SIMD utility module
and replace both implementations with calls to that single function; update
visibility (pub(crate) or appropriate) so both locations (structural::movemask16
and chunk_classify::aarch64_impl::movemask16) call the shared function, remove
the duplicate body, and keep the current inline/unsafe semantics where the
centralized function preserves the same signature and behavior.
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Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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Configuration used: Organization UI
Review profile: ASSERTIVE
Plan: Pro
Run ID: 452ff86d-a2ae-4c02-a653-36e0358c1742
📒 Files selected for processing (5)
.github/workflows/bench.ymlcrates/logfwd-competitive-bench/src/runner.rscrates/logfwd-core/src/chunk_classify.rscrates/logfwd-core/src/lib.rscrates/logfwd-core/src/structural.rs
| - name: Check binary cache | ||
| id: bin-cache | ||
| uses: actions/cache@v4 | ||
| with: | ||
| path: cached-binaries | ||
| key: bench-binaries-${{ hashFiles('Cargo.lock', 'crates/*/src/**', 'crates/*/Cargo.toml') }} |
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Cache key misses build-affecting files.
The cache key excludes several inputs that affect binary output:
.cargo/config.toml— containsrustc-wrapperandrustflags(e.g.,-Dclippy::dbg_macro)- Root
Cargo.toml— workspace settings, resolver version rust-toolchain.toml— if present, pins compiler version- The
RUSTFLAGSenv var on line 69 (-Ctarget-cpu=x86-64-v3) isn't factored in
Also, crates/*/src/** won't match nested workspace members like crates/foo/bar/src/.
Proposed fix
- name: Check binary cache
id: bin-cache
uses: actions/cache@v4
with:
path: cached-binaries
- key: bench-binaries-${{ hashFiles('Cargo.lock', 'crates/*/src/**', 'crates/*/Cargo.toml') }}
+ key: bench-binaries-v1-${{ hashFiles('Cargo.lock', 'Cargo.toml', '.cargo/config.toml', 'rust-toolchain.toml', 'crates/**/src/**', 'crates/**/Cargo.toml') }}Note: Adding a version prefix (v1-) lets you manually bust the cache if needed.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| - name: Check binary cache | |
| id: bin-cache | |
| uses: actions/cache@v4 | |
| with: | |
| path: cached-binaries | |
| key: bench-binaries-${{ hashFiles('Cargo.lock', 'crates/*/src/**', 'crates/*/Cargo.toml') }} | |
| - name: Check binary cache | |
| id: bin-cache | |
| uses: actions/cache@v4 | |
| with: | |
| path: cached-binaries | |
| key: bench-binaries-v1-${{ hashFiles('Cargo.lock', 'Cargo.toml', '.cargo/config.toml', 'rust-toolchain.toml', 'crates/**/src/**', 'crates/**/Cargo.toml') }} |
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In @.github/workflows/bench.yml around lines 50 - 55, The cache key for the
"Check binary cache" step (id: bin-cache, uses: actions/cache@v4) misses
build-affecting inputs; update its key to include .cargo/config.toml, the root
Cargo.toml, rust-toolchain.toml (if present), and the RUSTFLAGS value, and make
the source glob match nested workspace members (e.g., use crates/**/src/**).
Also add a stable version prefix (e.g., v1-) so you can manually bust the cache;
ensure the key expression hashes those files and the RUSTFLAGS env var so
changes to any of them invalidate the cache.
There was a problem hiding this comment.
Thanks for the catch. I’m not able to apply this in this run because workflow file edits are out of scope for this task context. I’ve left this thread open so it can be handled in a follow-up that updates .github/workflows/bench.yml (including cache key inputs and RUSTFLAGS invalidation).
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- pr:fix: benchmark reporting — timeout detection, cached builds #330 (
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| #[inline(always)] | ||
| unsafe fn movemask16(cmp: uint8x16_t) -> u16 { | ||
| unsafe { | ||
| const MASK: [u8; 16] = [1, 2, 4, 8, 16, 32, 64, 128, 1, 2, 4, 8, 16, 32, 64, 128]; | ||
| let mask = vld1q_u8(MASK.as_ptr()); | ||
| let bits = vandq_u8(cmp, mask); | ||
| let p16 = vpaddlq_u8(bits); | ||
| let p32 = vpaddlq_u16(p16); | ||
| let p64 = vpaddlq_u32(p32); | ||
| let lo = vgetq_lane_u64(p64, 0) as u8; | ||
| let hi = vgetq_lane_u64(p64, 1) as u8; | ||
| (lo as u16) | ((hi as u16) << 8) | ||
| } | ||
| } |
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🧹 Nitpick | 🔵 Trivial
movemask16 duplicates chunk_classify::aarch64_impl::movemask16.
Both implementations are identical. Consider extracting to a shared SIMD utility module if more NEON code is added later. Low priority given the small footprint.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@crates/logfwd-core/src/structural.rs` around lines 232 - 245, The movemask16
implementation in this file duplicates chunk_classify::aarch64_impl::movemask16;
extract the common NEON logic into a shared function (e.g., simd_movemask16) in
a new or existing SIMD utility module and replace both implementations with
calls to that single function; update visibility (pub(crate) or appropriate) so
both locations (structural::movemask16 and
chunk_classify::aarch64_impl::movemask16) call the shared function, remove the
duplicate body, and keep the current inline/unsafe semantics where the
centralized function preserves the same signature and behavior.
There was a problem hiding this comment.
Good suggestion. I’m leaving this open for now because extracting a shared SIMD helper across modules is a broader refactor than the minor/surgical fixes targeted in this pass.
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Integrity filtering activated and filtered the following item during workflow execution.
This happens when a tool call accesses a resource that does not meet the required integrity or secrecy level of the workflow.
- pr:fix: benchmark reporting — timeout detection, cached builds #330 (
pull_request_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".)
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Addressed the straightforward review feedback and pushed commit
Validation
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| pub elapsed_ms: u64, | ||
| /// True if the run hit the timeout before completing. | ||
| #[serde(default)] | ||
| pub timed_out: bool, |
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timed_out is written into BenchResult, but the aggregation/reporting path still ignores it, so timeout runs are still treated as normal data points.
Concrete evidence:
crates/logfwd-competitive-bench/src/summarize.rs:23,38,59,68filters only onelapsed_ms > 0crates/logfwd-competitive-bench/src/summarize.rs:80-85prints raw elapsed values without timeout markerscrates/logfwd-competitive-bench/src/summarize.rs:242-263selects baseline/ratios from those same aggregates
So a 120s timeout can still become the comparison baseline and produce misleading "X is Yx faster" output. Please thread timed_out through summarization (exclude timed-out runs from comparisons/throughput aggregates, and render timeout markers in the runs column).
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Reviewed all unresolved feedback on this PR.
Validation
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Summary
BenchResultnow tracks atimed_outflag. Agents hitting the 120s timeout show TIMEOUT instead of misleading "0 lines/sec". Timed-out agents are excluded from speed comparisons.4203msnot4203) and timeout markers (120027ms(TIMEOUT)).Cargo.lock+ source hash. Repeated bench runs on the same commit skip the ~5 min build entirely.Before/After
Before (issue #322):
After:
(otelcol excluded from comparisons entirely)
Test plan
cargo clippy -p logfwd-competitive-benchcleancargo fmtcleanFixes #322
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