uzbek-plus/logs/b7/b7b/dry/b7b-time-source.txt
q 8d7721c775 B7: add network time bootstrap and persistent B7C cache
B7A: QMI DMS time vs VNIIFTRI NTP (DMS = UTC - 0.28 s, sigma 1 ms; NITZ = DMS
truncated to 1 s). B7B: a 1970 -> 2026 date -s step is harmless for the modem
stack. B7C: aurora-modem probes DMS/NITZ along the start flow and steps
CLOCK_REALTIME once at the first valid sample (REG registered/attached), never
RTC; background SNTP check (query only) after START OK. 3/3 class-A cold boots
PASS (residual +0.04/+0.36/+0.84 s), cache 14fe453a written (B7C_WRITE_VERIFIED)
and verified by a normal power-on (V1, +0.26 s).

Also publishes the prerequisite R2 (boot-hang / lk eMMC investigation, T4
telnet baseline that B7C builds on) and R3 (autonomous cold boot, NCM loss)
material, and extends tools/publish-sanitize.py to r2/, r3/, b7/.
Binary images, initramfs, busybox and raw logs stay out (see b7/*/SHA256SUMS).
2026-10-02 20:18:25 +03:00

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DMS1 2886.567284 2886.602333 1474969459628
DMS2 2886.611416 2886.647292 1474969459672
DMS3 2886.656428 2886.691085 1474969459717
NITZ 2886.700044 2886.735349 2026-10-02 09:44:19 epoch=1790934259
DMS1 utc=1790934259.628 window=35.0ms offset_vs_clock=1790931373.043
DMS2 utc=1790934259.672 window=35.9ms offset_vs_clock=1790931373.043
DMS3 utc=1790934259.717 window=34.7ms offset_vs_clock=1790931373.043
NITZ epoch=1790934259 offset_vs_clock=1790931372.282
CHECK all values present: PASS
CHECK DMS >= image build 2026-10-02T08:09:01Z (1790928541): PASS
CHECK year >= 2026: PASS
CHECK not garbage (< build + 5 y; 1980/2017 excluded by floor): PASS
CHECK 3 DMS samples consistent (spread 0.6 ms < 50): PASS
CHECK |DMS - NITZ| = 0.761 s < 2: PASS
BEST DMS3 offset=1790931373.043243
VERDICT=GO