Re: [PATCH-for-9.1 v2 2/3] migration: Remove RDMA protocol handling

Hi Peter, hi Daniel,

On Fri, May 3, 2024 at 4:33 PM Peter Xu <peterx(a)redhat.com&gt; wrote: > > On Fri, May 03, 2024 at 08:40:03AM +0200, Jinpu Wang wrote: > > I had a brief check in the rsocket changelog, there seems some > > improvement over time, > > might be worth revisiting this. due to socket abstraction, we can't > > use some feature like > > ODP, it won't be a small and easy task. > > It'll be good to know whether Dan's suggestion would work first, without > rewritting everything yet so far. Not sure whether some perf test could > help with the rsocket APIs even without QEMU's involvements (or looking for > test data supporting / invalidate such conversions). > I did a quick test with iperf on 100 G environment and 40 G environment, in summary rsocket works pretty well. iperf tests between 2 hosts with 40 G (IB), first a few test with different num. of threads on top of ipoib interface, later with preload rsocket on top of same ipoib interface. jwang@ps401a-914.nst:~$ iperf -p 52000 -c 10.43.3.145 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.3.146 port 55602 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0001 sec 2.85 GBytes 2.44 Gbits/sec jwang@ps401a-914.nst:~$ iperf -p 52000 -c 10.43.3.145 -P 2 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 4] local 10.43.3.146 port 39640 connected with 10.43.3.145 port 52000 [ 3] local 10.43.3.146 port 39626 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0012 sec 2.85 GBytes 2.45 Gbits/sec [ 4] 0.0000-10.0026 sec 2.86 GBytes 2.45 Gbits/sec [SUM] 0.0000-10.0026 sec 5.71 GBytes 4.90 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.281/0.300/0.318/0.318 ms (tot/err) = 2/0 jwang@ps401a-914.nst:~$ iperf -p 52000 -c 10.43.3.145 -P 4 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 4] local 10.43.3.146 port 46956 connected with 10.43.3.145 port 52000 [ 6] local 10.43.3.146 port 46978 connected with 10.43.3.145 port 52000 [ 3] local 10.43.3.146 port 46944 connected with 10.43.3.145 port 52000 [ 5] local 10.43.3.146 port 46962 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0017 sec 2.85 GBytes 2.45 Gbits/sec [ 4] 0.0000-10.0015 sec 2.85 GBytes 2.45 Gbits/sec [ 5] 0.0000-10.0026 sec 2.85 GBytes 2.45 Gbits/sec [ 6] 0.0000-10.0005 sec 2.85 GBytes 2.45 Gbits/sec [SUM] 0.0000-10.0005 sec 11.4 GBytes 9.80 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.274/0.312/0.360/0.212 ms (tot/err) = 4/0 jwang@ps401a-914.nst:~$ iperf -p 52000 -c 10.43.3.145 -P 8 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 7] local 10.43.3.146 port 35062 connected with 10.43.3.145 port 52000 [ 6] local 10.43.3.146 port 35058 connected with 10.43.3.145 port 52000 [ 8] local 10.43.3.146 port 35066 connected with 10.43.3.145 port 52000 [ 9] local 10.43.3.146 port 35074 connected with 10.43.3.145 port 52000 [ 3] local 10.43.3.146 port 35038 connected with 10.43.3.145 port 52000 [ 12] local 10.43.3.146 port 35088 connected with 10.43.3.145 port 52000 [ 5] local 10.43.3.146 port 35048 connected with 10.43.3.145 port 52000 [ 4] local 10.43.3.146 port 35050 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 4] 0.0000-10.0005 sec 2.85 GBytes 2.44 Gbits/sec [ 8] 0.0000-10.0011 sec 2.85 GBytes 2.45 Gbits/sec [ 5] 0.0000-10.0000 sec 2.85 GBytes 2.45 Gbits/sec [ 12] 0.0000-10.0021 sec 2.85 GBytes 2.44 Gbits/sec [ 3] 0.0000-10.0003 sec 2.85 GBytes 2.44 Gbits/sec [ 7] 0.0000-10.0065 sec 2.50 GBytes 2.14 Gbits/sec [ 9] 0.0000-10.0077 sec 2.52 GBytes 2.16 Gbits/sec [ 6] 0.0000-10.0003 sec 2.85 GBytes 2.44 Gbits/sec [SUM] 0.0000-10.0003 sec 22.1 GBytes 19.0 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.096/0.226/0.339/0.109 ms (tot/err) = 8/0 jwang@ps401a-914.nst:~$ iperf -p 52000 -c 10.43.3.145 -P 16 [ 3] local 10.43.3.146 port 49540 connected with 10.43.3.145 port 52000 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 6] local 10.43.3.146 port 49554 connected with 10.43.3.145 port 52000 [ 8] local 10.43.3.146 port 49584 connected with 10.43.3.145 port 52000 [ 5] local 10.43.3.146 port 49552 connected with 10.43.3.145 port 52000 [ 20] local 10.43.3.146 port 49626 connected with 10.43.3.145 port 52000 [ 4] local 10.43.3.146 port 49606 connected with 10.43.3.145 port 52000 [ 9] local 10.43.3.146 port 49596 connected with 10.43.3.145 port 52000 [ 10] local 10.43.3.146 port 49604 connected with 10.43.3.145 port 52000 [ 26] local 10.43.3.146 port 49678 connected with 10.43.3.145 port 52000 [ 7] local 10.43.3.146 port 49556 connected with 10.43.3.145 port 52000 [ 25] local 10.43.3.146 port 49662 connected with 10.43.3.145 port 52000 [ 22] local 10.43.3.146 port 49636 connected with 10.43.3.145 port 52000 [ 11] local 10.43.3.146 port 49612 connected with 10.43.3.145 port 52000 [ 13] local 10.43.3.146 port 49618 connected with 10.43.3.145 port 52000 [ 23] local 10.43.3.146 port 49646 connected with 10.43.3.145 port 52000 [ 15] local 10.43.3.146 port 49688 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 11] 0.0000-10.0024 sec 2.28 GBytes 1.95 Gbits/sec [ 23] 0.0000-10.0022 sec 2.28 GBytes 1.95 Gbits/sec [ 20] 0.0000-10.0010 sec 2.28 GBytes 1.95 Gbits/sec [ 8] 0.0000-10.0032 sec 2.28 GBytes 1.95 Gbits/sec [ 26] 0.0000-10.0038 sec 2.28 GBytes 1.95 Gbits/sec [ 10] 0.0000-10.0002 sec 2.28 GBytes 1.95 Gbits/sec [ 7] 0.0000-10.0033 sec 2.28 GBytes 1.95 Gbits/sec [ 15] 0.0000-10.0015 sec 2.27 GBytes 1.95 Gbits/sec [ 4] 0.0000-10.0028 sec 2.28 GBytes 1.95 Gbits/sec [ 6] 0.0000-10.0012 sec 2.28 GBytes 1.96 Gbits/sec [ 13] 0.0000-10.0030 sec 2.28 GBytes 1.95 Gbits/sec [ 25] 0.0000-10.0051 sec 2.28 GBytes 1.95 Gbits/sec [ 5] 0.0000-10.0001 sec 2.28 GBytes 1.96 Gbits/sec [ 9] 0.0000-10.0017 sec 2.28 GBytes 1.95 Gbits/sec [ 22] 0.0000-10.0008 sec 2.27 GBytes 1.95 Gbits/sec [ 3] 0.0000-10.0033 sec 2.28 GBytes 1.95 Gbits/sec [SUM] 0.0000-10.0034 sec 36.4 GBytes 31.3 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.105/0.217/0.401/0.093 ms (tot/err) = 16/0 jwang@ps401a-914.nst:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.3.145 -P 16 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.3.146 port 48902 connected with 10.43.3.145 port 52000 [ 5] local 10.43.3.146 port 52777 connected with 10.43.3.145 port 52000 [ 9] local 10.43.3.146 port 42911 connected with 10.43.3.145 port 52000 [ 11] local 10.43.3.146 port 56354 connected with 10.43.3.145 port 52000 [ 15] local 10.43.3.146 port 43325 connected with 10.43.3.145 port 52000 [ 6] local 10.43.3.146 port 37041 connected with 10.43.3.145 port 52000 [ 7] local 10.43.3.146 port 58828 connected with 10.43.3.145 port 52000 [ 17] local 10.43.3.146 port 48858 connected with 10.43.3.145 port 52000 [ 13] local 10.43.3.146 port 49256 connected with 10.43.3.145 port 52000 [ 16] local 10.43.3.146 port 35652 connected with 10.43.3.145 port 52000 [ 8] local 10.43.3.146 port 48567 connected with 10.43.3.145 port 52000 [ 18] local 10.43.3.146 port 47394 connected with 10.43.3.145 port 52000 [ 19] local 10.43.3.146 port 48065 connected with 10.43.3.145 port 52000 [ 10] local 10.43.3.146 port 39788 connected with 10.43.3.145 port 52000 [ 4] local 10.43.3.146 port 46818 connected with 10.43.3.145 port 52000 [ 14] local 10.43.3.146 port 57174 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 14] 0.0000-10.0002 sec 2.30 GBytes 1.98 Gbits/sec [ 6] 0.0000-10.0004 sec 2.31 GBytes 1.98 Gbits/sec [ 5] 0.0000-10.0002 sec 2.31 GBytes 1.98 Gbits/sec [ 8] 0.0000-10.0001 sec 2.31 GBytes 1.98 Gbits/sec [ 11] 0.0000-10.0003 sec 2.31 GBytes 1.98 Gbits/sec [ 18] 0.0000-10.0003 sec 2.31 GBytes 1.98 Gbits/sec [ 3] 0.0000-10.0004 sec 2.31 GBytes 1.98 Gbits/sec [ 4] 0.0000-10.0005 sec 2.30 GBytes 1.98 Gbits/sec [ 17] 0.0000-10.0004 sec 2.31 GBytes 1.98 Gbits/sec [ 15] 0.0000-10.0005 sec 2.31 GBytes 1.98 Gbits/sec [ 19] 0.0000-10.0001 sec 2.30 GBytes 1.98 Gbits/sec [ 7] 0.0000-10.0004 sec 2.31 GBytes 1.98 Gbits/sec [ 13] 0.0000-10.0005 sec 2.31 GBytes 1.98 Gbits/sec [ 10] 0.0000-10.0003 sec 2.30 GBytes 1.98 Gbits/sec [ 9] 0.0000-10.0000 sec 2.31 GBytes 1.98 Gbits/sec [ 16] 0.0000-10.0002 sec 2.31 GBytes 1.98 Gbits/sec [SUM] 0.0000-10.0003 sec 36.9 GBytes 31.7 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 88.398/101.706/114.726/24.755 ms (tot/err) = 16/0 jwang@ps401a-914.nst:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.3.145 -P 1 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.3.146 port 49168 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0000 sec 34.3 GBytes 29.5 Gbits/sec jwang@ps401a-914.nst:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.3.145 -P 2 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.3.146 port 42096 connected with 10.43.3.145 port 52000 [ 4] local 10.43.3.146 port 58667 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 4] 0.0000-10.0001 sec 18.4 GBytes 15.8 Gbits/sec [ 3] 0.0000-10.0000 sec 18.5 GBytes 15.9 Gbits/sec [SUM] 0.0000-10.0001 sec 36.9 GBytes 31.7 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 38.155/38.997/39.839/39.839 ms (tot/err) = 2/0 jwang@ps401a-914.nst:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.3.145 -P 4 ------------------------------------------------------------ Client connecting to 10.43.3.145, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.3.146 port 36100 connected with 10.43.3.145 port 52000 [ 5] local 10.43.3.146 port 55108 connected with 10.43.3.145 port 52000 [ 6] local 10.43.3.146 port 41039 connected with 10.43.3.145 port 52000 [ 7] local 10.43.3.146 port 34868 connected with 10.43.3.145 port 52000 [ ID] Interval Transfer Bandwidth [ 7] 0.0000-10.0000 sec 9.22 GBytes 7.92 Gbits/sec [ 5] 0.0000-10.0000 sec 9.22 GBytes 7.92 Gbits/sec [ 3] 0.0000-10.0000 sec 9.22 GBytes 7.92 Gbits/sec [ 6] 0.0000-10.0001 sec 9.22 GBytes 7.92 Gbits/sec [SUM] 0.0000-10.0001 sec 36.9 GBytes 31.7 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 51.401/53.644/56.015/30.487 ms (tot/err) = 4/0 You can see with rsocket it reaches ~ 30 Gb/s with single stream, while ipoib only 2.5 Gb/s (12 X), ipoib scales with more threads until ~ 32 Gb/s, which is the link limit. With 100 G env, rsocket also out perform ipoib, see below: jwang@ps404a-59.stg:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.48.58 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.48.59 port 40588 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0000 sec 80.7 GBytes 69.4 Gbits/sec jwang@ps404a-59.stg:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.48.58 -P 2 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.48.59 port 41813 connected with 10.43.48.58 port 52000 [ 5] local 10.43.48.59 port 60638 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 5] 0.0000-10.0000 sec 48.9 GBytes 42.0 Gbits/sec [ 3] 0.0000-10.0000 sec 49.8 GBytes 42.8 Gbits/sec [SUM] 0.0000-10.0000 sec 98.7 GBytes 84.8 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 6.962/7.764/8.567/8.567 ms (tot/err) = 2/0 jwang@ps404a-59.stg:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.48.58 -P 4 [ 6] local 10.43.48.59 port 58086 connected with 10.43.48.58 port 52000 [ 3] local 10.43.48.59 port 49335 connected with 10.43.48.58 port 52000 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 4] local 10.43.48.59 port 44593 connected with 10.43.48.58 port 52000 [ 5] local 10.43.48.59 port 60464 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 5] 0.0000-10.0000 sec 28.0 GBytes 24.0 Gbits/sec [ 4] 0.0000-10.0000 sec 28.0 GBytes 24.0 Gbits/sec [ 3] 0.0000-10.0000 sec 28.0 GBytes 24.1 Gbits/sec [ 6] 0.0000-10.0000 sec 28.0 GBytes 24.1 Gbits/sec [SUM] 0.0000-10.0001 sec 112 GBytes 96.3 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 7.344/9.619/12.199/5.271 ms (tot/err) = 4/0 jwang@ps404a-59.stg:~$ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/rsocket/librspreload.so iperf -p 52000 -c 10.43.48.58 -P 8 [ 3] local 10.43.48.59 port 43020 connected with 10.43.48.58 port 52000 [ 7] local 10.43.48.59 port 59720 connected with 10.43.48.58 port 52000 [ 4] local 10.43.48.59 port 52547 connected with 10.43.48.58 port 52000 [ 8] local 10.43.48.59 port 41712 connected with 10.43.48.58 port 52000 [ 10] local 10.43.48.59 port 53126 connected with 10.43.48.58 port 52000 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 128 KByte (default) ------------------------------------------------------------ [ 6] local 10.43.48.59 port 60311 connected with 10.43.48.58 port 52000 [ 5] local 10.43.48.59 port 44103 connected with 10.43.48.58 port 52000 [ 9] local 10.43.48.59 port 49007 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 9] 0.0000-10.0001 sec 14.0 GBytes 12.0 Gbits/sec [ 8] 0.0000-10.0000 sec 14.0 GBytes 12.0 Gbits/sec [ 4] 0.0000-10.0001 sec 14.0 GBytes 12.0 Gbits/sec [ 6] 0.0000-10.0000 sec 14.0 GBytes 12.0 Gbits/sec [ 10] 0.0000-10.0000 sec 14.0 GBytes 12.0 Gbits/sec [ 7] 0.0000-10.0000 sec 14.0 GBytes 12.0 Gbits/sec [ 5] 0.0000-10.0001 sec 14.0 GBytes 12.0 Gbits/sec [ 3] 0.0000-10.0001 sec 14.0 GBytes 12.0 Gbits/sec [SUM] 0.0000-10.0001 sec 112 GBytes 96.3 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 6.942/12.361/18.109/4.872 ms (tot/err) = 8/0 jwang@ps404a-59.stg:~$ iperf -p 52000 -c 10.43.48.58 -P 8 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 4] local 10.43.48.59 port 58176 connected with 10.43.48.58 port 52000 [ 5] local 10.43.48.59 port 58180 connected with 10.43.48.58 port 52000 [ 3] local 10.43.48.59 port 58178 connected with 10.43.48.58 port 52000 [ 10] local 10.43.48.59 port 58226 connected with 10.43.48.58 port 52000 [ 11] local 10.43.48.59 port 58228 connected with 10.43.48.58 port 52000 [ 9] local 10.43.48.59 port 58212 connected with 10.43.48.58 port 52000 [ 7] local 10.43.48.59 port 58194 connected with 10.43.48.58 port 52000 [ 8] local 10.43.48.59 port 58198 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 9] 0.0000-10.0005 sec 15.8 GBytes 13.5 Gbits/sec [ 4] 0.0000-10.0002 sec 15.8 GBytes 13.6 Gbits/sec [ 3] 0.0000-10.0000 sec 15.8 GBytes 13.6 Gbits/sec [ 5] 0.0000-10.0002 sec 15.8 GBytes 13.6 Gbits/sec [ 8] 0.0000-10.0005 sec 7.89 GBytes 6.78 Gbits/sec [ 10] 0.0000-10.0000 sec 15.8 GBytes 13.6 Gbits/sec [ 11] 0.0000-10.0014 sec 7.94 GBytes 6.82 Gbits/sec [ 7] 0.0000-10.0009 sec 15.8 GBytes 13.6 Gbits/sec [SUM] 0.0000-10.0009 sec 111 GBytes 95.1 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.234/0.325/0.406/0.155 ms (tot/err) = 8/0 jwang@ps404a-59.stg:~$ iperf -p 52000 -c 10.43.48.58 -P 4 [ 3] local 10.43.48.59 port 42548 connected with 10.43.48.58 port 52000 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 4] local 10.43.48.59 port 42558 connected with 10.43.48.58 port 52000 [ 5] local 10.43.48.59 port 42560 connected with 10.43.48.58 port 52000 [ 6] local 10.43.48.59 port 42562 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 6] 0.0000-10.0000 sec 27.8 GBytes 23.9 Gbits/sec [ 5] 0.0000-10.0001 sec 27.3 GBytes 23.5 Gbits/sec [ 3] 0.0000-10.0001 sec 27.8 GBytes 23.9 Gbits/sec [ 4] 0.0000-10.0001 sec 27.8 GBytes 23.9 Gbits/sec [SUM] 0.0000-10.0001 sec 111 GBytes 95.1 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.295/0.340/0.390/0.201 ms (tot/err) = 4/0 jwang@ps404a-59.stg:~$ iperf -p 52000 -c 10.43.48.58 -P 2 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 4] local 10.43.48.59 port 44194 connected with 10.43.48.58 port 52000 [ 3] local 10.43.48.59 port 44186 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0000 sec 48.3 GBytes 41.5 Gbits/sec [ 4] 0.0000-10.0000 sec 41.3 GBytes 35.5 Gbits/sec [SUM] 0.0000-10.0000 sec 89.7 GBytes 77.0 Gbits/sec [ CT] final connect times (min/avg/max/stdev) = 0.227/0.233/0.240/0.240 ms (tot/err) = 2/0 jwang@ps404a-59.stg:~$ pbkvm list VM State PID Cores Mem VNC Migration -------------------------------------------- Total: 0 VMs, Running: 0 jwang@ps404a-59.stg:~$ iperf -p 52000 -c 10.43.48.58 -P 1 ------------------------------------------------------------ Client connecting to 10.43.48.58, TCP port 52000 TCP window size: 165 KByte (default) ------------------------------------------------------------ [ 3] local 10.43.48.59 port 40364 connected with 10.43.48.58 port 52000 [ ID] Interval Transfer Bandwidth [ 3] 0.0000-10.0000 sec 51.2 GBytes 44.0 Gbits/sec Thanks! > Thanks, > > -- > Peter Xu >