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Commit a5ee171d authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

selftests: mlxsw: qos_mc_aware: Add a test for UC awareness 



In a previous patch, mlxsw was updated to configure a minimum bandwidth
allowance on MC TCs. Test that this indeed fixes the problem of UC
traffic overload pushing out all MC traffic.

Fixes: b5638d46 ("selftests: mlxsw: Add a test for UC behavior under MC flood")
Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8f3f0935

tools/testing/selftests/drivers/net/mlxsw/qos_mc_aware.sh

+70 −23
Original line number Diff line number Diff line
@@ -25,24 +25,24 @@ 
# Thus we set MTU to 10K on all involved interfaces. Then both unicast and

# multicast traffic uses 8K frames.

#

# +-----------------------+                +----------------------------------+

# +---------------------------+            +----------------------------------+

# | H1                        |            |                               H2 |

# |                           |            |  unicast --> + $h2.111           |

# |                       |                |  traffic     | 192.0.2.129/28    |

# |          multicast    |                |              | e-qos-map 0:1     |

# |          traffic      |                |              |                   |

# | $h1 + <-----          |                |              + $h2               |

# +-----|-----------------+                +--------------|-------------------+

# |                 multicast |            |  traffic     | 192.0.2.129/28    |

# |                 traffic   |            |              | e-qos-map 0:1     |

# |           $h1 + <-----    |            |              |                   |

# | 192.0.2.65/28 |           |            |              + $h2               |

# +---------------|-----------+            +--------------|-------------------+

#                 |                                       |

# +-----|-------------------------------------------------|-------------------+

# |     + $swp1                                           + $swp2             |

# |     | >1Gbps                                          | >1Gbps            |

# | +---|----------------+                     +----------|----------------+  |

# | |   + $swp1.1        |                     |          + $swp2.111      |  |

# +---------------|---------------------------------------|-------------------+

# |         $swp1 +                                       + $swp2             |

# |        >1Gbps |                                       | >1Gbps            |

# | +-------------|------+                     +----------|----------------+  |

# | |     $swp1.1 +      |                     |          + $swp2.111      |  |

# | |                BR1 |             SW      | BR111                     |  |

# | |   + $swp3.1        |                     |          + $swp3.111      |  |

# | +---|----------------+                     +----------|----------------+  |

# |     \_________________________________________________/                   |

# | |     $swp3.1 +      |                     |          + $swp3.111      |  |

# | +-------------|------+                     +----------|----------------+  |

# |               \_______________________________________/                   |

# |                                    |                                      |

# |                                    + $swp3                                |

# |                                    | 1Gbps bottleneck                     |
@@ -51,6 +51,7 @@ 
#                                      |

#                                   +--|-----------------+

#                                   |  + $h3          H3 |

#                                   |  | 192.0.2.66/28   |

#                                   |  |                 |

#                                   |  + $h3.111         |

#                                   |    192.0.2.130/28  |
@@ -59,6 +60,7 @@ 
ALL_TESTS="

	ping_ipv4

	test_mc_aware

	test_uc_aware

"



lib_dir=$(dirname $0)/../../../net/forwarding
@@ -68,14 +70,14 @@ source $lib_dir/lib.sh 


h1_create()

{

	simple_if_init $h1

	simple_if_init $h1 192.0.2.65/28

	mtu_set $h1 10000

}



h1_destroy()

{

	mtu_restore $h1

	simple_if_fini $h1

	simple_if_fini $h1 192.0.2.65/28

}



h2_create()
@@ -97,7 +99,7 @@ h2_destroy() 


h3_create()

{

	simple_if_init $h3

	simple_if_init $h3 192.0.2.66/28

	mtu_set $h3 10000



	vlan_create $h3 111 v$h3 192.0.2.130/28
@@ -108,7 +110,7 @@ h3_destroy() 
	vlan_destroy $h3 111



	mtu_restore $h3

	simple_if_fini $h3

	simple_if_fini $h3 192.0.2.66/28

}



switch_create()
@@ -251,7 +253,7 @@ measure_uc_rate() 
	# average ingress rate to somewhat mitigate this.

	local min_ingress=2147483648



	mausezahn $h2.111 -p 8000 -A 192.0.2.129 -B 192.0.2.130 -c 0 \

	$MZ $h2.111 -p 8000 -A 192.0.2.129 -B 192.0.2.130 -c 0 \

		-a own -b $h3mac -t udp -q &

	sleep 1
@@ -291,7 +293,7 @@ test_mc_aware() 
	check_err $? "Could not get high enough UC-only ingress rate"

	local ucth1=${uc_rate[1]}



	mausezahn $h1 -p 8000 -c 0 -a own -b bc -t udp -q &

	$MZ $h1 -p 8000 -c 0 -a own -b bc -t udp -q &



	local d0=$(date +%s)

	local t0=$(ethtool_stats_get $h3 rx_octets_prio_0)
@@ -335,6 +337,51 @@ test_mc_aware() 
	echo "    egress UC throughput  $(humanize ${uc_rate_2[1]})"

	echo "    ingress MC throughput $(humanize $mc_ir)"

	echo "    egress MC throughput  $(humanize $mc_er)"

	echo

}



test_uc_aware()

{

	RET=0



	$MZ $h2.111 -p 8000 -A 192.0.2.129 -B 192.0.2.130 -c 0 \

		-a own -b $h3mac -t udp -q &



	local d0=$(date +%s)

	local t0=$(ethtool_stats_get $h3 rx_octets_prio_1)

	local u0=$(ethtool_stats_get $swp2 rx_octets_prio_1)

	sleep 1



	local attempts=50

	local passes=0

	local i



	for ((i = 0; i < attempts; ++i)); do

		if $ARPING -c 1 -I $h1 -b 192.0.2.66 -q -w 0.1; then

			((passes++))

		fi



		sleep 0.1

	done



	local d1=$(date +%s)

	local t1=$(ethtool_stats_get $h3 rx_octets_prio_1)

	local u1=$(ethtool_stats_get $swp2 rx_octets_prio_1)



	local interval=$((d1 - d0))

	local uc_ir=$(rate $u0 $u1 $interval)

	local uc_er=$(rate $t0 $t1 $interval)



	((attempts == passes))

	check_err $?



	# Suppress noise from killing mausezahn.

	{ kill %% && wait; } 2>/dev/null



	log_test "MC performace under UC overload"

	echo "    ingress UC throughput $(humanize ${uc_ir})"

	echo "    egress UC throughput  $(humanize ${uc_er})"

	echo "    sent $attempts BC ARPs, got $passes responses"

}



trap cleanup EXIT