ppopp-review-process
ResearchUse when reasoning about how a PPoPP submission is evaluated, covering double-blind review, the Program Committee plus External/Extended Review Committee model, TPMS reviewer matching, the author-response rebuttal, the accept/reject decision with automatic poster consideration, and how PPoPP's process differs from PLDI's and CGO's.
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PPoPP Review Process
Model the pipeline before interpreting any single review. PPoPP runs a single-round, double-blind conference review with a scheduled author-response rebuttal and an unusual safety net: papers not accepted for a talk are automatically considered for posters. The most consequential mental shift for authors arriving from a journal-style venue is that there is (as verified) no guaranteed revise-and-resubmit round — the rebuttal is your one written turn, so it must land.
Process model
- Submission and review run on HotCRP with double-blind anonymity: author identities are hidden from reviewers and reviewer identities from authors.
- Papers are read by the Program Committee and an External/Extended Review Committee (ERC); declare conflicts against both pools. Reviewer assignment may use the Toronto Paper Matching System (TPMS), so your abstract and topic tags shape who reads you.
- After the initial reviews there is a fixed author-response period (PPoPP 2026: 27–29 October 2025). Authors respond within a word cap; reviewers then discuss and decide.
- The primary decision is accept / reject for a regular presentation. Whether an explicit intermediate "Revision" category is offered in a given cycle is 待核实 — do not assume it.
- Automatic poster consideration: submissions not accepted for a talk are automatically considered for the poster track, with a two-page summary in the proceedings.
What PPoPP reviewers weigh
| Axis | What they check | Common failure |
|---|---|---|
| Parallelism as the contribution | Is the concurrency/parallel-performance the point? | A compiler/theory result wearing a parallel costume (a CGO/POPL reroute) |
| Correctness under concurrency | Races, linearizability/progress, the memory model | "It passed my tests" with no argument about interleavings |
| Scalability | Speedup curves, core sweeps, NUMA/GPU, saturation | One thread count; a win that vanishes on another topology |
| Baseline honesty | Comparison to the strongest real competitor | Beating a strawman or the authors' own unoptimized code |
| Measurement rigor | Variance, warm-up, pinning, repeated runs | A single-run bar chart with no error bars |
| Reproducibility | Enough to re-run; an artifact | Hardware and topology unstated |
Reading a decision
| Decision | What it means | Author move |
|---|---|---|
| Accept (talk) | Contribution and evidence hold | Camera-ready + artifact; do not reopen scope |
| Poster (auto-considered) | The idea is of interest but not a full talk this cycle | Decide in advance whether the 2-page proceedings summary is worth it |
| Reject | Structural: wrong scope, weak baseline, no scaling story | Reframe or reroute (CGO/PLDI/ASPLOS/SC or a later round) |
| "Revision" (if offered — 待核实) | Repairable gaps within a bounded window | Treat as an R&R; make or explicitly decline every request with evidence |
The strategic reading: because there is (as verified) one written turn, design the submission so its weakest point is answerable in the rebuttal with a number you already have (a pre-run baseline, an extra core-count) rather than something requiring a month of new machine time.
How PPoPP differs from its siblings
- vs. PLDI/CGO: those judge a language/compiler contribution; PPoPP judges the parallel-program
behavior. A great pass with a thin scaling story fails here and would pass there. Different
template too (PPoPP two-column
acmartsigplan, 10 pages). - vs. POPL: POPL rewards the concurrency proof itself; PPoPP wants the proof plus a measured parallel system. A pure logic is a POPL paper.
- vs. ASPLOS/HPCA: those own the machine; a PPoPP reviewer reads your hardware as the platform, not the result, and will discount a win that is really a microarchitecture artifact.
Where author leverage actually exists
[Before submission] abstract + topic tags -> TPMS/PC matching (largest early lever)
[Initial reviews] factual corrections, a pre-run number, a clarified interleaving argument
[Rebuttal] the decisive turn: answer "does it scale?" and "baseline X?" with data
already in hand, within the word cap
[After reject] no appeal; reroute to a co-located sibling or the next round
A rebuttal moves borderline papers when it supplies a scaling point or a baseline a reviewer said was missing; it does not move papers when it argues taste or promises future experiments. The classic PPoPP loss is a reviewer asking "how does this behave at 128 cores / on a second GPU?" and the authors having only the one machine's numbers.
Reading a review packet
Weight reviews before answering. A review that cites your speedup figure, your baseline choice, and your correctness argument was read closely; answer each reviewer on the axis they raised — correctness reviewers with an interleaving argument, performance reviewers with a number. A review that only questions novelty has left soundness to the others; do not spend your word budget there.
Misreadings to avoid
- Assuming a revise-and-resubmit safety net — as verified there is one written turn; the rebuttal is not a placeholder.
- Treating the poster path as failure — the two-page proceedings summary is a real, citable outcome; decide about it deliberately.
- Ignoring the ERC — external reviewers carry real weight and real conflicts.
- Projecting last year's cadence — round count, rebuttal timing, and any "Revision" category are decided per edition.
Output format
[Process stage] pre-submission / awaiting reviews / rebuttal / decided
[Decision] accept / poster / reject / revision(if offered), with the driving criterion
[Criterion map] each review point -> parallelism-as-point | correctness | scalability | baseline | measurement | reproducibility
[Leverage plan] the rebuttal number or correction that can actually change the outcome
[Forbidden moves] identity leak / promised-but-unrun experiments / arguing taste