Blame extensions/libxt_cpu.man
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.TP
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[\fB!\fP] \fB\-\-cpu\fP \fInumber\fP
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Match cpu handling this packet. cpus are numbered from 0 to NR_CPUS-1
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Can be used in combination with RPS (Remote Packet Steering) or
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multiqueue NICs to spread network traffic on different queues.
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.PP
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Example:
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.PP
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iptables \-t nat \-A PREROUTING \-p tcp \-\-dport 80 \-m cpu \-\-cpu 0
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\-j REDIRECT \-\-to\-port 8080
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.PP
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iptables \-t nat \-A PREROUTING \-p tcp \-\-dport 80 \-m cpu \-\-cpu 1
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\-j REDIRECT \-\-to\-port 8081
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.PP
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Available since Linux 2.6.36.
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