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A latency-percentile curve that stays flat to p90 then climbs steeply, beside one that stays flat

PCIe ASPM and Why You Should Disable It for Passthrough

Active State Power Management saves a few watts on idle PCIe links. Under VFIO passthrough, it adds latency jitter that’s hard to diagnose and easy to fix.

7th August 2026 Β· 8 min Β· 1661 words Β· Damien Dye