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Equation 1 · Part 3 · AI Datacenter Interconnects in Practice: An Advanced Technical Guide

multiplication

4.096 μs×2timeout4.096\ \mu s \times 2^{\text{timeout}}
multiplication

What this part means

Multiply the quantities on either side.

Its job in the formula

Multiply the quantities on either side.

The passage around this formula

NCCLAL_ALGO and NCCLPL_PROTO select which collective algorithm and wire protocol a given operation uses; NCCLIL_IBHB_HCA filters which InfiniBand host channel adapters, ports and rails are eligible for a job, in a format that can descend to individual rail and plane; NCCLSL_SOCKETIT_IFNAME performs the equivalent filtering for the out-of-band control interfaces [ 1 ] . On the InfiniBand transport specifically, NCCLIL_IBTB_TIMEOUT sets the retransmission timeout as 4.096\ μ\mu s ×\times 2^{timeout\text{timeout}} , with the library’s own default raised to 20 as of version 2.23, and NCCLIL_IBRB_RETRYCY_CNT defaults to seven retry attempts before a queue pair gives up [ 1 ] — both are tuned upward on fabrics with longer…

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Learn the underlying idea

Multiplication scales one quantity by another. A dot, a cross, or adjacent symbols can indicate a product.

Open the illustrated multiplication: combining factors guide →

Sources cited in the surrounding passage

These citations provide research context; check each source for the exact claim it supports.