From aa13e5241a8fa32b26d5a6b8b63d04c6357243f4 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Tue, 10 Oct 2023 16:21:13 +0300 Subject: [PATCH] selftests: fib_tests: Count all trace point invocations The tests rely on the IPv{4,6} FIB trace points being triggered once for each forwarded packet. If receive processing is deferred to the ksoftirqd task these invocations will not be counted and the tests will fail. Fix by specifying the '-a' flag to avoid perf from filtering on the mausezahn task. Before: # ./fib_tests.sh -t ipv4_mpath_list IPv4 multipath list receive tests TEST: Multipath route hit ratio (.68) [FAIL] # ./fib_tests.sh -t ipv6_mpath_list IPv6 multipath list receive tests TEST: Multipath route hit ratio (.27) [FAIL] After: # ./fib_tests.sh -t ipv4_mpath_list IPv4 multipath list receive tests TEST: Multipath route hit ratio (1.00) [ OK ] # ./fib_tests.sh -t ipv6_mpath_list IPv6 multipath list receive tests TEST: Multipath route hit ratio (.99) [ OK ] Fixes: 8ae9efb859c0 ("selftests: fib_tests: Add multipath list receive tests") Reported-by: kernel test robot Closes: https://lore.kernel.org/netdev/202309191658.c00d8b8-oliver.sang@intel.com/ Tested-by: kernel test robot Signed-off-by: Ido Schimmel Reviewed-by: David Ahern Tested-by: Sriram Yagnaraman Link: https://lore.kernel.org/r/20231010132113.3014691-3-idosch@nvidia.com Signed-off-by: Jakub Kicinski --- tools/testing/selftests/net/fib_tests.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 0dbb26b4fa4a..66d0db7a2614 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -2452,7 +2452,7 @@ ipv4_mpath_list_test() # words, the FIB lookup tracepoint needs to be triggered for every # packet. local t0_rx_pkts=$(link_stats_get ns2 veth2 rx packets) - run_cmd "perf stat -e fib:fib_table_lookup --filter 'err == 0' -j -o $tmp_file -- $cmd" + run_cmd "perf stat -a -e fib:fib_table_lookup --filter 'err == 0' -j -o $tmp_file -- $cmd" local t1_rx_pkts=$(link_stats_get ns2 veth2 rx packets) local diff=$(echo $t1_rx_pkts - $t0_rx_pkts | bc -l) list_rcv_eval $tmp_file $diff @@ -2497,7 +2497,7 @@ ipv6_mpath_list_test() # words, the FIB lookup tracepoint needs to be triggered for every # packet. local t0_rx_pkts=$(link_stats_get ns2 veth2 rx packets) - run_cmd "perf stat -e fib6:fib6_table_lookup --filter 'err == 0' -j -o $tmp_file -- $cmd" + run_cmd "perf stat -a -e fib6:fib6_table_lookup --filter 'err == 0' -j -o $tmp_file -- $cmd" local t1_rx_pkts=$(link_stats_get ns2 veth2 rx packets) local diff=$(echo $t1_rx_pkts - $t0_rx_pkts | bc -l) list_rcv_eval $tmp_file $diff