4096synthetic guardband rowsUNKNOWNInspect metric contract
4memory contextsUNKNOWNInspect metric contract
0live server runsUNKNOWNInspect metric contract
SIMULATION / SA-MEM-DRAM-RELIABILITY-003
DRAM refresh, RowHammer, and ECC guardband replay
Refresh/ECC Guardband
A browser CSV replay that keeps temperature, retention-tail cells, refresh policy, activation pressure, RowHammer disturbance risk, ECC coverage, thermal stress, and next evidence check in one table.
EXPLORE
Start with the observable.
Use this page when the simulation is the primary artifact. The linked lesson explains the concept; the linked lab keeps the visual replay surface available.
- Filter memory context, retention-tail class, temperature, access pattern, refresh policy, and protection policy before trusting a single risk number.
- Compare retention stress, refresh overhead, activation pressure, hammer-risk proxy, ECC coverage proxy, residual uncorrectable-risk proxy, thermal stress, and data-integrity guardband together.
- Use the decision gate to choose whether the next evidence belongs to retention-tail characterization, refresh-tax measurement, RowHammer mitigation review, ECC/scrub evidence, thermal mapping, or bounded lesson reuse.
- Keep the public boundary visible: this is not a RowHammer attack workflow, DIMM qualification, standards table, vendor recommendation, or live memory simulator.
BROWSER INTERACTIVE LAB
Filter the saved CSV. Inspect matching replay rows.
No server solver is running here. The browser filters a precomputed table and redraws the plot locally.
Loading replay rowsReading the saved CSV in this browser.
refresh overhead indexhammer risk proxyecc detection coverage proxyresidual uncorrectable risk proxydata integrity guardband score
Each metric is normalized independently for shape inspection. Vertical positions do not compare magnitude across metrics.
n/arefresh overhead index
n/ahammer risk proxy
n/aecc detection coverage proxy
n/aresidual uncorrectable risk proxy
n/adata integrity guardband score
Change one or more controls to find a saved row. No unrelated CSV value is substituted.
| case id | memory context | retention tail | temperature class | access pattern | refresh policy | protection policy | retention stress score | refresh overhead index | hammer risk proxy | ecc detection coverage proxy | residual uncorrectable risk proxy | data integrity guardband score | decision gate | next safe check |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Loading saved replay rows... | ||||||||||||||
RUN CARD
Conditions before conclusions.
The browser filters saved CSV rows. It does not run DRAMsim3, Ramulator2, RowHammer tests, exploit code, memory-controller firmware, BIOS settings, or trace uploads, and it does not qualify a DIMM, product, ECC scheme, or mitigation.
Primary knobs
- memory context
- retention-tail class
- temperature class
- access pattern
- refresh policy
- protection / ECC policy
Saved outputs
- retention stress score
- refresh overhead index
- availability latency tax
- activation pressure index
- hammer risk proxy
- ECC detection coverage proxy
- residual uncorrectable risk proxy
- thermal power stress proxy
- data-integrity guardband score
- decision gate
EXPORT
Download the public artifacts.
These exports are the supported public files for review. PDK files and restricted third-party material are not redistributed.
DRAM reliability guardband CSV
/data/dram-refresh-rowhammer-ecc-guardband-replay-v85.csv
Open file ->Typed web JSON
/data/dram-refresh-rowhammer-ecc-guardband-replay-web-v1.json
Open file ->Model card
/data/dram-refresh-rowhammer-ecc-guardband-replay-model-card-v1.md
Open file ->METHODS
How the number was made.
Methods are written for citation discipline: the extraction rule matters as much as the plotted value.
Generate a Cartesian synthetic sweep across memory context, retention-tail class, temperature, access pattern, refresh policy, and protection policy.
Keep this method attached when reusing the figure or metric.
Normalize public DRAM refresh, RAS, RowHammer, simulator, and ECC vocabulary into proxy scores for retention stress, refresh tax, activation pressure, residual risk, thermal pressure, and guardband.
Keep this method attached when reusing the figure or metric.
Apply decision gates that route the learner to retention-tail, refresh-tax, RowHammer mitigation, ECC/scrub, thermal-system, or bounded-lesson evidence before any claim is reused.
Keep this method attached when reusing the figure or metric.
Store CSV, typed JSON, model card, source notes, and public boundary together with no paid article body, copied paper figure, simulator code, DIMM data, or product table.
Keep this method attached when reusing the figure or metric.
LIMITS
What this page does not claim.
The MVP is useful because the limits are visible. These statements prevent a teaching simulation from being cited as silicon evidence.
No live server DRAMsim3, Ramulator2, RowHammer tester, attack workflow, exploit code, reverse-engineering procedure, DIMM test recipe, BIOS setting, memory-controller programming, trace upload, or memory simulator is active.
Carry this boundary into any derivative note, paper draft, or slide.
No JEDEC table, vendor datasheet row, proprietary RAS mechanism, internal TRR behavior, ECC implementation, product recommendation, DIMM qualification, security assurance, or reliability signoff is claimed.
Carry this boundary into any derivative note, paper draft, or slide.
No account, upload, payment, comment, newsletter signup action, job/event workflow, public service intake, process recipe, equipment control, ATE programming, product release, or copied paid/licensed source content is enabled.
Carry this boundary into any derivative note, paper draft, or slide.
Rows are normalized synthetic teaching proxies and require owned retention, temperature, activation, syndrome, scrub, workload, and thermal evidence before stronger engineering reuse.
Carry this boundary into any derivative note, paper draft, or slide.
EVIDENCE
Trace the claim back to artifacts.
The evidence route remains the catalog-level browser; this page is the simulation-level reading card.
CSV replay with 4096 rows and explicit retention, refresh, activation, RowHammer, ECC, thermal, guardband, and decision-gate fields.
SA-MEM-DRAM-RELIABILITY-003
Typed JSON summary with role views, decision-gate counts, high-risk slices, bounded study candidates, source anchors, methods, limits, and public boundary.
SA-MEM-DRAM-RELIABILITY-003
Model card saved beside the public dataset and experiment record.
SA-MEM-DRAM-RELIABILITY-003
Source spine uses public documentation, public research metadata, and public repository links only; it does not copy restricted standards, datasets, code, figures, product tables, or exploit instructions.
SA-MEM-DRAM-RELIABILITY-003
Source spine
These links anchor the public teaching model. They do not convert the replay into a qualified process recipe or signoff result.
Purdue Semiconductor Memory 101Public memory-course anchor for DRAM, SRAM, Flash, emerging memory, hierarchy, reliability, packaging, and system-management vocabulary.Micron DDR5 SDRAM public product pagePublic DDR5/RAS vocabulary anchor used link-first only, not as a product recommendation or timing calibration.Micron DDR5 RAS feature discussionPublic source for same-bank refresh, on-die ECC, and error-check/scrub vocabulary without copying product tables or vendor claims.Google Security Rowhammer research supportPublic 2025 signal that RowHammer remains an ecosystem reliability/security issue; used as a defense-oriented context anchor only.CMU-SAFARI BlockHammerPublic RowHammer mitigation research repository anchor; SemiAgora does not copy code or teach attack procedures.Ramulator2 public memory-system simulatorPublic simulator anchor for future local-build study; v85 does not run it on the server or accept traces.DRAMsim3 public simulatorPublic DRAM timing/controller/thermal simulator anchor; v85 stores only original synthetic replay rows.RowHammer retrospectiveResearch metadata/source anchor for RowHammer as a circuit-level reliability effect with system-security consequences.USENIX Security 2025 DDR4 ECC RowHammer studyResearch anchor for ECC and mitigation limits; SemiAgora uses only high-level evidence vocabulary and no exploit workflow.
Public execution boundary
No server-side live ngspice execution, uploads, accounts, payments, comments, newsletter signup, or job/event submissions are active on this page.