1 #!/bin/sh 2 # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved. 3 # 4 # This program is free software; you can redistribute it and/or 5 # modify it under the terms of the GNU General Public License as 6 # published by the Free Software Foundation; either version 2 of 7 # the License, or (at your option) any later version. 8 # 9 # This program is distributed in the hope that it would be useful, 10 # but WITHOUT ANY WARRANTY; without even the implied warranty of 11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 # GNU General Public License for more details. 13 # 14 # You should have received a copy of the GNU General Public License 15 # along with this program. If not, see <http://www.gnu.org/licenses/>. 16 # 17 # Author: Alexey Kodanev <alexey.kodanev (at] oracle.com> 18 19 TCID=dctcp01 20 TST_TOTAL=1 21 TST_CLEANUP="cleanup" 22 def_alg="cubic" 23 prev_alg= 24 25 . test_net.sh 26 27 set_cong_alg() 28 { 29 local alg=$1 30 tst_resm TINFO "setting $alg" 31 32 tst_set_sysctl net.ipv4.tcp_congestion_control $alg safe 33 } 34 35 cleanup() 36 { 37 if [ "$prev_cong_ctl" ]; then 38 tst_set_sysctl net.ipv4.tcp_congestion_control $prev_alg 39 fi 40 tst_rmdir 41 tc qdisc del dev $(tst_iface) root netem loss 0.03% ecn 42 } 43 44 setup() 45 { 46 if tst_kvcmp -lt "3.18"; then 47 tst_brkm TCONF "test requires kernel 3.18 or newer" 48 fi 49 50 tst_require_root 51 tst_check_cmds ip sysctl tc 52 53 tst_resm TINFO "emulate congestion with packet loss 0.03% and ECN" 54 tc qdisc add dev $(tst_iface) root netem loss 0.03% ecn > /dev/null 2>&1 55 if [ $? -ne 0 ]; then 56 tst_brkm TCONF "netem doesn't support ECN" 57 fi 58 59 tst_tmpdir 60 61 prev_alg="$(sysctl -n net.ipv4.tcp_congestion_control)" 62 } 63 64 test_run() 65 { 66 tst_resm TINFO "compare '$def_alg' and 'dctcp' congestion alg. results" 67 68 set_cong_alg "$def_alg" 69 70 tst_netload -H $(tst_ipaddr rhost) 71 local res0="$(cat tst_netload.res)" 72 73 set_cong_alg "dctcp" 74 75 tst_netload -H $(tst_ipaddr rhost) 76 local res1="$(cat tst_netload.res)" 77 78 local per=$(( $res0 * 100 / $res1 - 100 )) 79 80 if [ "$per" -lt "10" ]; then 81 tst_resm TFAIL "dctcp performance $per %" 82 else 83 tst_resm TPASS "dctcp performance $per %" 84 fi 85 } 86 87 setup 88 89 test_run 90 91 tst_exit 92
