Mikhail Chusavitin
ced2175fb0
On multi-socket systems, run the NVIDIA bandwidth diagnostic once per CPU socket before the all-GPU pass, so a crash confined to the all-GPU run (with clean per-socket passes preceding it) isolates a cross-socket peer-to-peer fault instead of leaving it conflated with a general GPU/PCIe issue. Single-socket systems keep the original one-pass shape. Also expand the support-bundle README with reference notes distilled from a real analysis pass (BMC clock drift, "0/empty" tool output meaning absent hardware rather than a fault, timestamp-matching before assigning causality, and a normal-power-cycle SEL signature), plus a step-by-step recipe for diagnosing an unexpected reboot/crash during a specific test.