Hi Jesse , Thanks for your reply. The other modules I am talking about are not ovs vport-vxlan and vport-gre.
They are Linux kernels vxlan.ko(/lib/modules/3.10.0-123.20.1.el7.x86_64/kernel/drivers/net/vxlan.ko) and gre.ko (/lib/modules/3.10.0-123.20.1.el7.x86_64/kernel/net/ipv4/gre.ko). When I do modprobe openvswitch, please find lsmod | grep openvswitch output below. [root@GNDC_Server ~]# lsmod | grep openvswitch openvswitch 114436 0 vxlan 37584 1 openvswitch gre 13808 1 openvswitch libcrc32c 12644 3 xfs,bnx2x,openvswitch [root@GNDC_Server ~]# modinfo vxlan filename: /lib/modules/3.10.0-123.20.1.el7.x86_64/kernel/drivers/net/vxlan.ko alias: rtnl-link-vxlan author: Stephen Hemminger <step...@networkplumber.org> version: 0.1 license: GPL srcversion: C6625FA51501A53A1D77A2E depends: ip_tunnel intree: Y vermagic: 3.10.0-123.20.1.el7.x86_64 SMP mod_unload modversions signer: CentOS Linux kernel signing key sig_key: 18:2E:BB:09:CD:40:C9:4C:A0:C3:CE:4E:E3:F7:1D:F5:20:B4:DA:80 sig_hashalgo: sha256 parm: udp_port:Destination UDP port (ushort) parm: log_ecn_error:Log packets received with corrupted ECN (bool) [root@GNDC_Server ~]# modinfo gre filename: /lib/modules/3.10.0-123.20.1.el7.x86_64/kernel/net/ipv4/gre.ko license: GPL author: D. Kozlov (x...@mail.ru) description: GRE over IPv4 demultiplexer driver srcversion: 976DD3A723FD7DBEA067264 depends: intree: Y vermagic: 3.10.0-123.20.1.el7.x86_64 SMP mod_unload modversions signer: CentOS Linux kernel signing key sig_key: 18:2E:BB:09:CD:40:C9:4C:A0:C3:CE:4E:E3:F7:1D:F5:20:B4:DA:80 sig_hashalgo: sha256 Looking forward to your reply. Thanks & Regards, Uday -----Original Message----- From: Jesse Gross [mailto:je...@nicira.com] Sent: Tuesday, September 29, 2015 2:06 AM To: Ravulakollu Udaya Kumar (WT01 - Product Engineering Service) Cc: dev@openvswitch.org Subject: Re: [ovs-dev] Drop in Rx rate if host kernel is only loaded with openvswitch.ko kernel module. On Mon, Sep 28, 2015 at 8:52 AM, <ravulakollu.ku...@wipro.com> wrote: > Hello Team, > > Recently I observed an issue which is very strange to me . I am > testing Phy-OVS-phy performance Testing(1G) > > I am using ovs-2.4.0 code. I compiled it successfully , and installed > all userspace utils. And I insmoded openvswitch.ko kernel module only > , nothing else(I could see other modules like vport-geneve.ko > vport-gre.ko vport-lisp.ko etc.) > > Below is my configuration: > > 1. Created a bridge and added two physical ports.(two are trunk ports) > > 2. Started running vswitchd. > > > Started pumping traffic(64byte packet at 1G rate) from external packet > generator to phy port1 and receiving the same on packet on phy port2 (packet > gen -phy1---OVS-phy2---packetgen) . > > But the results are very strange. Tx rate =761,904,776bps Rx > rate=141,857,472bps. It's a huge drop in rx rate. > > Somehow I figured out that " I am inserting only openvswitch.ko" , which is > the cause for huge decrease in rate. > > If I do modprobe openvswitch , I could see other modules (vxlan,gre) are > loaded . In that case I am getting almost 1G Rx rate. > > Could someone tell me , why it's happening so? Does these other > modules are required for proper throughput ? correct me if my Analysis is > wrong . These modules shouldn't be needed unless you are using one of these tunneling protocols (in which case traffic wouldn't flow at all without them inserted). Assuming nothing else changed besides the modules, I guess you are seeing some variations in your test setup. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
