1 #!/bin/sh 2 3 # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved. 4 # 5 # This program is free software; you can redistribute it and/or 6 # modify it under the terms of the GNU General Public License as 7 # published by the Free Software Foundation; either version 2 of 8 # the License, or (at your option) any later version. 9 # 10 # This program is distributed in the hope that it would be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU General Public License for more details. 14 # 15 # You should have received a copy of the GNU General Public License 16 # along with this program. If not, see <http://www.gnu.org/licenses/>. 17 # 18 # Author: Alexey Kodanev <alexey.kodanev (at] oracle.com> 19 # 20 21 TST_TOTAL=1 22 TCID="busy_poll02" 23 24 # tst_netload() parameters 25 clients_num=2 26 client_requests=500000 27 # num of requests after which TCP connection is closed 28 max_requests=500000 29 30 . test_net.sh 31 32 cleanup() 33 { 34 tst_rhost_run -c "pkill -9 tcp_fastopen\$" 35 tst_rmdir 36 37 sysctl -q -w net.core.busy_poll=$busy_poll_old 38 tst_rhost_run -c "sysctl -q -w net.core.busy_poll=$rbusy_poll_old" 39 } 40 41 tst_require_root 42 43 tst_kvercmp 3 11 0 44 [ $? -eq 0 ] && tst_brkm TCONF "test must be run with kernel 3.11 or newer" 45 46 if [ ! -f "/proc/sys/net/core/busy_read" -a \ 47 ! -f "/proc/sys/net/core/busy_poll" ]; then 48 tst_brkm TCONF "busy poll not configured, CONFIG_NET_RX_BUSY_POLL" 49 fi 50 51 set_busy_poll() 52 { 53 local value=${1:-"0"} 54 ROD_SILENT sysctl -q -w net.core.busy_poll=$value 55 tst_rhost_run -s -c "sysctl -q -w net.core.busy_poll=$value" 56 } 57 58 tst_check_cmds pkill sysctl 59 60 tst_tmpdir 61 62 busy_poll_old="$(cat /proc/sys/net/core/busy_poll)" 63 rbusy_poll_old=$(tst_rhost_run -c 'cat /proc/sys/net/core/busy_poll') 64 65 TST_CLEANUP="cleanup" 66 trap "tst_brkm TBROK 'test interrupted'" INT 67 68 for x in 50 0; do 69 tst_resm TINFO "set low latency busy poll to $x per socket" 70 set_busy_poll $x 71 tst_netload $(tst_ipaddr rhost) res_$x TFO -b $x || \ 72 tst_brkm TBROK "netload() failed" 73 tst_resm TINFO "time spent is '$(cat res_$x)' ms" 74 done 75 76 poll_cmp=$(( 100 - ($(cat res_50) * 100) / $(cat res_0) )) 77 78 if [ "$poll_cmp" -lt 1 ]; then 79 tst_resm TFAIL "busy poll result is '$poll_cmp' %" 80 else 81 tst_resm TPASS "busy poll increased performance by '$poll_cmp' %" 82 fi 83 84 tst_exit 85
