#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2015-2018 Oracle and/or its affiliates. All Rights Reserved.
#
# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
. busy_poll_lib.sh
cleanup()
{
[ -n "$busy_read_old" ] && \
sysctl -q -w net.core.busy_read=$busy_read_old
[ -n "$busy_poll_old" ] && \
sysctl -q -w net.core.busy_poll=$busy_poll_old
[ -n "$rbusy_read_old" ] && \
tst_rhost_run -c "sysctl -q -w net.core.busy_read=$rbusy_read_old"
[ -n "$rbusy_poll_old" ] && \
tst_rhost_run -c "sysctl -q -w net.core.busy_poll=$rbusy_poll_old"
}
set_busy_poll()
{
local value=${1:-"0"}
ROD_SILENT sysctl -q -w net.core.busy_read=$value
ROD_SILENT sysctl -q -w net.core.busy_poll=$value
tst_rhost_run -s -c "sysctl -q -w net.core.busy_read=$value"
tst_rhost_run -s -c "sysctl -q -w net.core.busy_poll=$value"
}
setup()
{
busy_poll_check_config
busy_read_old="$(cat /proc/sys/net/core/busy_read)"
busy_poll_old="$(cat /proc/sys/net/core/busy_poll)"
rbusy_read_old=$(tst_rhost_run -c 'cat /proc/sys/net/core/busy_read')
rbusy_poll_old=$(tst_rhost_run -c 'cat /proc/sys/net/core/busy_poll')
}
test()
{
for x in 50 0; do
tst_res TINFO "set low latency busy poll to $x"
set_busy_poll $x
tst_netload -H $(tst_ipaddr rhost) -n 10 -N 10 -d res_$x
done
local poll_cmp=$(( 100 - ($(cat res_50) * 100) / $(cat res_0) ))
if [ "$poll_cmp" -lt 1 ]; then
tst_res TFAIL "busy poll result is '$poll_cmp' %"
else
tst_res TPASS "busy poll increased performance by '$poll_cmp' %"
fi
}
tst_run