If you see errors related to expn64v2gcm in your system logs (dmesg, syslog, or hardware events), here are the most common failures:
According to benchmark leaks from early silicon testing (2023–2024), expn64v2gcm work shows the following improvements over prior GCM accelerators: expn64v2gcm work
| Metric | Standard SW AES-GCM | expn64v1 GCM | expn64v2 GCM | |--------|---------------------|--------------|---------------| | Throughput (Gbps) | 1-2 | 12 | 28 | | Per-byte latency (ns) | 85 | 22 | 9.4 | | GHASH mul. per block | 1 per 16B | 1 per 32B | 1 per 64B | | Power efficiency (Gbps/W) | 0.4 | 3.1 | 7.8 | If you see errors related to expn64v2gcm in
The expn64v2gcm work achieves near-linear scaling up to 100 Gbps on PCIe 5.0 links. When we talk about the work of expn64v2gcm
When we talk about the work of expn64v2gcm, we are describing three primary computational threads:
GCM requires a unique nonce (number used once) for each encryption operation. The v2 iteration of this unit likely improves the counter management engine, preventing nonce reuse—a catastrophic security flaw in GCM.