[Submitted on 11 Jul 2026 (v1), last revised 24 Jul 2026 (this version, v3)]

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Abstract:In-DRAM Rowhammer defenses pin the mitigation threshold at manufacture time, yet the true Rowhammer Threshold (TRHD) varies with runtime temperature. We propose Dynamic Rowhammer Threshold Management, a defense-agnostic runtime layer that re-sources each defense's threshold from the observed temperature once per epoch via a linear-$T$ model with a VRD-motivated guardband $g$, projecting the result onto SALT-C, PRAC, and TRR through each defense's threshold parameter. A decoupled oracle that scales physical TRHD per-DIMM by $\delta \sim \mathrm{N}(1, \sigma)$ breaks model self-consistency. The layer drives PRAC's 72 staleness breaches at 85$^\circ$C to zero; at $\sigma{=}0.10$, sweeping $g$ collapses PRAC breaches from 38.4 ($g{=}1.0$) to 9.6 ($g{=}0.9$). SALT-C drops from 10 nominal-static breaches to 2 (Dynamic) to 0 (bootstrap), at $\leq$5.1\% latency. TRR is capacity-limited; the layer acts as a diagnostic.

Submission history

From: Hoeseok Yang [view email]
[v1] Sat, 11 Jul 2026 16:44:33 UTC (24 KB)
[v2] Tue, 14 Jul 2026 03:34:04 UTC (24 KB)
[v3] Fri, 24 Jul 2026 00:05:57 UTC (24 KB)