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Doorbell write iflib igc driver Network stack Memory, mbufs, DMA Scheduler, interrupts Idle Other

Data table

Capture	Forwarded	CPU busy	Samples	Idle loop	iflib_txd_db_check	drain_ring_lockless	bus_dmamap_load_mbuf_sg
Original	0.955 Mpps	100 %	50,615	0.3 %	27.4 %	25.6 %	21.5 %
Fix	2.0 Mpps	58 %	50,477	40.7 %	13.8 %	1.0 %	0.3 %
Batched	2.0 Mpps	45 %	50,456	52.1 %	0.9 %	1.4 %	0.3 %

Function columns are self time as a share of all samples.