diff --git a/test/lib/setup b/test/lib/setup
index a81e91f..124e35b 100755
--- a/test/lib/setup
+++ b/test/lib/setup
@@ -13,9 +13,9 @@
 # Copyright (c) 2021 Red Hat GmbH
 # Author: Stefano Brivio <sbrivio@redhat.com>
 
-VCPUS="$( [ $(nproc) -ge 8 ] && echo 4 || echo $(( $(nproc) / 2 + 1 )) )"
+VCPUS="$( [ $(nproc) -ge 8 ] && echo 6 || echo $(( $(nproc) / 2 + 1 )) )"
 __mem_kib="$(sed -n 's/MemTotal:[ ]*\([0-9]*\) kB/\1/p' /proc/meminfo)"
-VMEM="$((${__mem_kib} / 1024 / 8))"
+VMEM="$((${__mem_kib} / 1024 / 4))"
 
 # setup_build() - Set up pane layout for build tests
 setup_build() {
@@ -107,6 +107,9 @@ setup_passt_in_ns() {
 	#  10011    as server  | forwarded to guest |  spliced to ns
 	#  10012               |     as server      |  spliced to ns
 	#  10013               |   spliced to init  |    as server
+	#
+	#  10021    as server  | forwarded to guest |
+	#  10031    as server  | forwarded to guest |
 
 	__opts=
 	[ ${PCAP} -eq 1 ] && __opts="${__opts} -p /tmp/pasta_with_passt.pcap"
@@ -138,8 +141,8 @@ setup_passt_in_ns() {
 	[ ${PCAP} -eq 1 ] && __opts="${__opts} -p /tmp/passt_in_pasta.pcap"
 	[ ${DEBUG} -eq 1 ] && __opts="${__opts} -d"
 
-	#pane_run PASST "valgrind --max-stackframe=3000000 ./passt -f ${__opts} -t 10001,10011 -u 10001,10011"
-	pane_run PASST "./passt -f ${__opts} -t 10001,10011 -u 10001,10011"
+	#pane_run PASST "valgrind --max-stackframe=3000000 ./passt -f ${__opts} -t 10001,10011,10021,10031 -u 10001,10011,10021,10031"
+	pane_run PASST "./passt -f ${__opts} -t 10001,10011,10021,10031 -u 10001,10011,10021,10031"
 	sleep 1
 
 	pane_run GUEST './qrap 5 kvm -m '${VMEM}' -cpu host -smp '${VCPUS}	\
@@ -148,7 +151,7 @@ setup_passt_in_ns() {
 		'-nodefaults '						\
 		'-append "console=ttyS0 mitigations=off apparmor=0 '	\
 		'virtio-net.napi_tx=1"'					\
-		"-device virtio-net-pci,netdev=hostnet0,x-txburst=131072"\
+		"-device virtio-net-pci,netdev=hostnet0,x-txburst=262144"\
 		"-netdev socket,fd=5,id=hostnet0"
 	pane_wait GUEST
 }
diff --git a/test/perf/passt_udp b/test/perf/passt_udp
index 1385c86..a5d43fc 100644
--- a/test/perf/passt_udp
+++ b/test/perf/passt_udp
@@ -31,9 +31,9 @@ hout	FREQ_PROCFS (echo "scale=1"; sed -n 's/cpu MHz.*: \([0-9]*\)\..*$/(\1+10^2\
 hout	FREQ_CPUFREQ (echo "scale=1"; printf '( %i + 10^5 / 2 ) / 10^6\n' $(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq) ) | bc -l
 hout	FREQ [ -n "__FREQ_CPUFREQ__" ] && echo __FREQ_CPUFREQ__ || echo __FREQ_PROCFS__
 
-set	THREADS 2
+set	THREADS 4
 set	STREAMS 1
-set	OPTS -u -i1 -t30 -P __STREAMS__ --pacing-timer 10000
+set	OPTS -u -i1 -t30 -P __STREAMS__ --pacing-timer 1000
 
 info	Throughput in Gbps, latency in µs, __THREADS__ threads at __FREQ__ GHz, one stream each
 
@@ -50,15 +50,15 @@ iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 2G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 0.8 1.2
 guest	ip link set dev __IFNAME__ mtu 1500
-iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 2G
+iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 1.0 1.5
 guest	ip link set dev __IFNAME__ mtu 9000
-iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 4G
+iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 5G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 4.0 5.0
 guest	ip link set dev __IFNAME__ mtu 65520
-iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 5G
+iperf3c	guest __GW6__%__IFNAME__ 100${i}2 __THREADS__ __OPTS__ -b 7G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 4.0 5.0
 
@@ -75,11 +75,11 @@ lat	__LAT__ 200 150
 
 tr	UDP throughput over IPv4: guest to host
 guest	ip link set dev __IFNAME__ mtu 256
-iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 300M
+iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 500M
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 0.1 0.2
 guest	ip link set dev __IFNAME__ mtu 576
-iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 500M
+iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 1G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 0.4 0.6
 guest	ip link set dev __IFNAME__ mtu 1280
@@ -87,15 +87,15 @@ iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 2G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 0.8 1.2
 guest	ip link set dev __IFNAME__ mtu 1500
-iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 2G
+iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 1.0 1.5
 guest	ip link set dev __IFNAME__ mtu 9000
-iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 4G
+iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 6G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 4.0 5.0
 guest	ip link set dev __IFNAME__ mtu 65520
-iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 5G
+iperf3c	guest __GW__ 100${i}2 __THREADS__ __OPTS__ -b 7G
 iperf3s	BW ns 100${i}2 __THREADS__
 bw	__BW__ 4.0 5.0
 
@@ -122,11 +122,11 @@ iperf3c	ns ::1 100${i}1 __THREADS__ __OPTS__ -b 2G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 1.0 1.5
 ns	ip link set dev lo mtu 9000
-iperf3c	ns ::1 100${i}1 __THREADS__ __OPTS__ -b 4G
+iperf3c	ns ::1 100${i}1 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 4.0 5.0
 ns	ip link set dev lo mtu 65520
-iperf3c	ns ::1 100${i}1 __THREADS__ __OPTS__ -b 4G
+iperf3c	ns ::1 100${i}1 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 5.0 5.5
 
@@ -144,28 +144,28 @@ ns	ip link set dev lo mtu 65535
 
 tr	UDP throughput over IPv4: host to guest
 ns	ip link set dev lo mtu 256
-iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 300M
+iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 1G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 0.1 0.2
 ns	ip link set dev lo mtu 576
-iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 500M
+iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 1G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 0.4 0.6
 ns	ip link set dev lo mtu 1280
 ns	ip addr add ::1 dev lo
-iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 2G
+iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 0.8 1.2
 ns	ip link set dev lo mtu 1500
-iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 2G
+iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 1.0 1.5
 ns	ip link set dev lo mtu 9000
-iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 4G
+iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 4.0 5.0
 ns	ip link set dev lo mtu 65520
-iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 4G
+iperf3c	ns 127.0.0.1 100${i}1 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW guest 100${i}1 __THREADS__
 bw	__BW__ 5.0 5.5
 
diff --git a/test/perf/pasta_udp b/test/perf/pasta_udp
index 0968379..39a6e24 100644
--- a/test/perf/pasta_udp
+++ b/test/perf/pasta_udp
@@ -141,19 +141,19 @@ th	MTU 1500B 4000B 16384B 65520B
 
 tr	UDP throughput over IPv6: ns to host
 ns	ip link set dev __IFNAME__ mtu 1500
-iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 1G
+iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 2G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 0.3 0.5
 ns	ip link set dev __IFNAME__ mtu 4000
-iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 2G
+iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 0.5 0.8
 ns	ip link set dev __IFNAME__ mtu 16384
-iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 3G
+iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 4G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 3.0 4.0
 ns	ip link set dev __IFNAME__ mtu 65520
-iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 3G
+iperf3c	ns __GW6__%__IFNAME__ 100${i}3 __THREADS__ __OPTS__ -b 6G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 6.0 7.0
 
@@ -169,19 +169,19 @@ lat	__LAT__ 200 150
 
 tr	UDP throughput over IPv4: ns to host
 ns	ip link set dev __IFNAME__ mtu 1500
-iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 1G
+iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 2G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 0.3 0.5
 ns	ip link set dev __IFNAME__ mtu 4000
-iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 2G
+iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 3G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 0.5 0.8
 ns	ip link set dev __IFNAME__ mtu 16384
-iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 3G
+iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 4G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 3.0 4.0
 ns	ip link set dev __IFNAME__ mtu 65520
-iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 3G
+iperf3c	ns __GW__ 100${i}3 __THREADS__ __OPTS__ -b 6G
 iperf3s	BW host 100${i}3 __THREADS__
 bw	__BW__ 6.0 7.0