<div dir="ltr">Hi, <div><br></div><div>This is normal because OVS or LinuxBridge wire up VMs using TAP interface which runs on kernel space and that drives higher interrupt and that makes the kernel so busy working on handling packets. Standard OVS/LinuxBridge are not meant for higher PPS. </div><div><br></div><div>If you want to handle higher PPS then look for DPDK or SRIOV deployment. ( We are running everything in SRIOV because of high PPS requirement) </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 5, 2023 at 11:11 AM Ha Noi <<a href="mailto:hanoi952022@gmail.com">hanoi952022@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><p style="margin:0px;padding:0px 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">Hi everyone,</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">I'm using Openstack Train and Openvswitch for ML2 driver and GRE for tunnel type. I tested our network performance between two VMs and suffer packet loss as below.</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">VM1: IP: <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">VM2: IP: <a href="https://10.20.1.154/24" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.154</a></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">VM3: IP: <a href="https://10.20.1.72/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.72</a></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)"><br></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">Using iperf3 to testing performance between VM1 and VM2.</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">Run iperf3 client and server on both VMs.</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">On VM2: iperf3 -t 10000 -b 130M -l 442 -P 6 -u -c <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">On VM1: iperf3 -t 10000 -b 130M -l 442 -P 6 -u -c <a href="https://10.20.1.154/24" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.154</a></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)"><br></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">Using VM3 ping into VM1, then the packet is lost and the latency is quite high.</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)"><br></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">ping -i 0.1 <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">PING <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a> (<a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>) 56(84) bytes of data.</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=1 ttl=64 time=7.70 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=2 ttl=64 time=6.90 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=3 ttl=64 time=7.71 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=4 ttl=64 time=7.98 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=6 ttl=64 time=8.58 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=7 ttl=64 time=8.34 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=8 ttl=64 time=8.09 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=10 ttl=64 time=4.57 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=11 ttl=64 time=8.74 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=12 ttl=64 time=9.37 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=14 ttl=64 time=9.59 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=15 ttl=64 time=7.97 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=16 ttl=64 time=8.72 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">64 bytes from <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a>: icmp_seq=17 ttl=64 time=9.23 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">^C</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">--- <a href="https://10.20.1.206/" rel="noopener nofollow ugc" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline" target="_blank">10.20.1.206</a> ping statistics ---</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">34 packets transmitted, 28 received, 17.6471% packet loss, time 3328ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">rtt min/avg/max/mdev = 1.396/6.266/9.590/2.805 ms</p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)"><br></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)"><br></p><p style="margin:0px;padding:0.8em 0px 0.25em;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">Does any one get this issue ?</p><p style="margin:0px;padding:0.8em 0px 0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;font-size:14px;line-height:inherit;font-family:"Noto Sans",Arial,sans-serif;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;color:rgb(28,28,28)">Please help me. Thanks</p></div>
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