# 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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bail_on_lldpad()
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{
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if systemctl is-active --quiet lldpad; then
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cat >/dev/stderr <<-EOF
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WARNING: lldpad is running
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lldpad will likely configure DCB, and this test will
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configure Qdiscs. mlxsw does not support both at the
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same time, one of them is arbitrarily going to overwrite
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the other. That will cause spurious failures (or,
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unlikely, passes) of this test.
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EOF
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if [[ -z $ALLOW_LLDPAD ]]; then
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cat >/dev/stderr <<-EOF
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If you want to run the test anyway, please set
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an environment variable ALLOW_LLDPAD to a
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non-empty string.
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EOF
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exit 1
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else
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return
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fi
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fi
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}
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__mlnx_qos()
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{
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local err
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mlnx_qos "$@" 2>/dev/null
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err=$?
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if ((err)); then
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echo "Error ($err) in mlnx_qos $@" >/dev/stderr
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fi
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return $err
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}
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