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| author | David Gibson <david@gibson.dropbear.id.au> | 2023-11-06 18:08:29 +1100 |
|---|---|---|
| committer | Stefano Brivio <sbrivio@redhat.com> | 2023-11-07 09:56:13 +0100 |
| commit | 29269705239fc3102a42950a5d84c3c3acd619d0 (patch) | |
| tree | d65c6381539f5e102902237c38542cd2b22e23ed /test | |
| parent | e516809a74ffd495481a7adf6b565181861a41f9 (diff) | |
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test/perf: Small MTUs for spliced TCP aren't interesting
Currently we make TCP throughput measurements for spliced connections with
a number of different MTU values. However, the results from this aren't
really interesting.
Unlike with tap connections, spliced connections only involve the loopback
interface on host and container, not a "real" external interface. lo
typically has an MTU of 65535 and there is very little reason to ever
change that. So, the measurements for smaller MTUs are rarely going to be
relevant.
In addition, the fact that we can offload all the {de,}packetization to the
kernel with splice(2) means that the throughput difference between these
MTUs isn't very great anyway.
Remove the short MTUs and only show spliced throughput for the normal
65535 byte loopback MTU. This reduces runtime of the performance tests on
my laptop by about 1 minute (out of ~24 minutes).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Diffstat (limited to 'test')
| -rw-r--r-- | test/perf/pasta_tcp | 53 |
1 files changed, 1 insertions, 52 deletions
diff --git a/test/perf/pasta_tcp b/test/perf/pasta_tcp index a8938c3..3a8ad40 100644 --- a/test/perf/pasta_tcp +++ b/test/perf/pasta_tcp @@ -35,39 +35,23 @@ hout FREQ [ -n "__FREQ_CPUFREQ__" ] && echo __FREQ_CPUFREQ__ || echo __FREQ_PROC info Throughput in Gbps, latency in µs, __THREADS__ threads at __FREQ__ GHz, __STREAMS__ streams each report pasta lo_tcp __THREADS__ __FREQ__ -th MTU 1500B 4000B 16384B 65535B +th MTU 65535B tr TCP throughput over IPv6: ns to host iperf3s host 100${i}3 __THREADS__ -ns ip link set dev lo mtu 1500 -iperf3 BW ns ::1 100${i}3 __THREADS__ __TIME__ __OPTS__ -bw __BW__ 15.0 20.0 -ns ip link set dev lo mtu 4000 -iperf3 BW ns ::1 100${i}3 __THREADS__ __TIME__ __OPTS__ -bw __BW__ 15.0 20.0 -ns ip link set dev lo mtu 16384 -iperf3 BW ns ::1 100${i}3 __THREADS__ __TIME__ __OPTS__ -bw __BW__ 15.0 20.0 -ns ip link set dev lo mtu 65535 iperf3 BW ns ::1 100${i}3 __THREADS__ __TIME__ __OPTS__ bw __BW__ 15.0 20.0 iperf3k host tl TCP RR latency over IPv6: ns to host -lat - -lat - -lat - hostb tcp_rr --nolog -P 10003 -C 10013 -6 nsout LAT tcp_rr --nolog -P 10003 -C 10013 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p' hostw lat __LAT__ 150 100 tl TCP CRR latency over IPv6: ns to host -lat - -lat - -lat - hostb tcp_crr --nolog -P 10003 -C 10013 -6 nsout LAT tcp_crr --nolog -P 10003 -C 10013 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p' hostw @@ -77,34 +61,18 @@ lat __LAT__ 500 350 tr TCP throughput over IPv4: ns to host iperf3s host 100${i}3 __THREADS__ -ns ip link set dev lo mtu 1500 -iperf3 BW ns 127.0.0.1 100${i}3 __THREADS__ __TIME__ __OPTS__ -bw __BW__ 15.0 20.0 -ns ip link set dev lo mtu 4000 -iperf3 BW ns 127.0.0.1 100${i}3 __THREADS__ __TIME__ __OPTS__ -bw __BW__ 15.0 20.0 -ns ip link set dev lo mtu 16384 -iperf3 BW ns 127.0.0.1 100${i}3 __THREADS__ __TIME__ __OPTS__ -bw __BW__ 15.0 20.0 -ns ip link set dev lo mtu 65535 iperf3 BW ns 127.0.0.1 100${i}3 __THREADS__ __TIME__ __OPTS__ bw __BW__ 15.0 20.0 iperf3k host tl TCP RR latency over IPv4: ns to host -lat - -lat - -lat - hostb tcp_rr --nolog -P 10003 -C 10013 -4 nsout LAT tcp_rr --nolog -P 10003 -C 10013 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p' hostw lat __LAT__ 150 100 tl TCP CRR latency over IPv4: ns to host -lat - -lat - -lat - hostb tcp_crr --nolog -P 10003 -C 10013 -4 nsout LAT tcp_crr --nolog -P 10003 -C 10013 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p' hostw @@ -113,27 +81,18 @@ lat __LAT__ 500 350 tr TCP throughput over IPv6: host to ns iperf3s ns 100${i}2 __THREADS__ -bw - -bw - -bw - iperf3 BW host ::1 100${i}2 __THREADS__ __TIME__ __OPTS__ bw __BW__ 15.0 20.0 iperf3k ns tl TCP RR latency over IPv6: host to ns -lat - -lat - -lat - nsb tcp_rr --nolog -P 10002 -C 10012 -6 hout LAT tcp_rr --nolog -P 10002 -C 10012 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p' nsw lat __LAT__ 150 100 tl TCP CRR latency over IPv6: host to ns -lat - -lat - -lat - nsb tcp_crr --nolog -P 10002 -C 10012 -6 hout LAT tcp_crr --nolog -P 10002 -C 10012 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p' nsw @@ -143,28 +102,18 @@ lat __LAT__ 1000 700 tr TCP throughput over IPv4: host to ns iperf3s ns 100${i}2 __THREADS__ -bw - -bw - -bw - iperf3 BW host 127.0.0.1 100${i}2 __THREADS__ __TIME__ __OPTS__ bw __BW__ 15.0 20.0 iperf3k ns tl TCP RR latency over IPv4: host to ns -lat - -lat - -lat - nsb tcp_rr --nolog -P 10002 -C 10012 -4 hout LAT tcp_rr --nolog -P 10002 -C 10012 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p' nsw lat __LAT__ 150 100 tl TCP CRR latency over IPv4: host to ns -lat - -lat - -lat - -sleep 1 nsb tcp_crr --nolog -P 10002 -C 10012 -4 hout LAT tcp_crr --nolog -P 10002 -C 10012 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p' nsw |