57 lines
1.3 KiB
Bash
57 lines
1.3 KiB
Bash
# SPDX-License-Identifier: GPL-2.0
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check_rate()
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{
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local rate=$1; shift
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local min=$1; shift
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local what=$1; shift
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if ((rate > min)); then
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return 0
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fi
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echo "$what $(humanize $ir) < $(humanize $min)" > /dev/stderr
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return 1
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}
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measure_rate()
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{
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local sw_in=$1; shift # Where the traffic ingresses the switch
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local host_in=$1; shift # Where it ingresses another host
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local counter=$1; shift # Counter to use for measurement
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local what=$1; shift
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local interval=10
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local i
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local ret=0
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# Dips in performance might cause momentary ingress rate to drop below
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# 1Gbps. That wouldn't saturate egress and MC would thus get through,
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# seemingly winning bandwidth on account of UC. Demand at least 2Gbps
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# average ingress rate to somewhat mitigate this.
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local min_ingress=2147483648
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for i in {5..0}; do
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local t0=$(ethtool_stats_get $host_in $counter)
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local u0=$(ethtool_stats_get $sw_in $counter)
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sleep $interval
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local t1=$(ethtool_stats_get $host_in $counter)
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local u1=$(ethtool_stats_get $sw_in $counter)
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local ir=$(rate $u0 $u1 $interval)
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local er=$(rate $t0 $t1 $interval)
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if check_rate $ir $min_ingress "$what ingress rate"; then
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break
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fi
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# Fail the test if we can't get the throughput.
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if ((i == 0)); then
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ret=1
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fi
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done
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echo $ir $er
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return $ret
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}
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