Reading Congestion Correctly: XmitWait, Hotspots, and the Real Bottleneck
Congestion diagnosisXMItWAIT IS A SYMPTOM · FIND THE DOWNSTREAM CONSTRAINTX4 NETWORKSCongestion hotspot and XmitWaitLEAF–SPINE HOTSPOT MAP Spine 1Spine 2Leaf 1Leaf 2Leaf 3Leaf 4 ! GPU AGPU BGPU CGPU D Constraint:…