#!/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