multiplication

The passage around this formula

NCC$L_A$LGO and NCC$L_P$ROTO select which collective algorithm and wire protocol a given operation uses; NCC$L_I$$B_H$CA filters which InfiniBand host channel adapters, ports and rails are eligible for a job, in a format that can descend to individual rail and plane; NCC$L_S$OCKE$T_I$FNAME performs the equivalent filtering for the out-of-band control interfaces [ 1 ] . On the InfiniBand transport specifically, NCC$L_I$$B_T$IMEOUT sets the retransmission timeout as 4.096\ $\mu$ s $\times$ 2^{$\text{timeout}$} , with the library’s own default raised to 20 as of version 2.23, and NCC$L_I$$B_R$ETR$Y_C$NT defaults to seven retry attempts before a queue pair gives up [ 1 ] — both are tuned upward on fabrics with longer…

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