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When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug
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When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug

The Cloudflare Blog ·Esteban Carisimo·4 months ago
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#cubic#congestion#loss#cwnd#idle#article

We investigated a bug where CUBIC's congestion window became pinned at its minimum floor, causing a performance to plummet. The fix involved correctly measuring idle periods to distinguish RTT wait times from actual application idleness.

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