James Dykman wrote: > Dor, > > I ran some netperf tests with your PV > virtio drivers, along with some Xen PV cases > and a few others for comparison. I thought you > (and the list) might be interested in the numbers. > > Thanks for the tests it indeed interesting. Actually except for a small optimization (receiving several msgs from the tap and sending a single irq) I haven't had the time to optimize the code. It's also interesting to check what lguest is doing since the qemu path is not polished, also lguest has newer virtio drivers. > I am going to start looking for bottlenecks, unless > you need help with the new hypercall updates. > I'll re-run when that is available. > > Any help would be great. I also need to move towards the latest virtio patch that includes a change in the shared memory and pci like config space. I planned on doing this starting mid next week.
W.r.t performance the following can improve: - Avi's shorten latency tap patch - Using scatter gather in qemu tap That's why using bigger pkts don't help performance. - Minimize guest tx hypercalls - Running oprofile - Host side kernel driver. Thanks, Dor. > Jim > > Tests were run with Netperf-2.4.3, TCP Socket > buffers were 256k. All of the tests were run with > netserver in the guest, netperf in the host/dom0. > No bridge was used. > > Hardware: IBM HS21 blade > Dual Xeon w/HT @ 1.6GHz, 4GB > > The host/Dom0 configuration: > kvm.*: > Host is 32 bit Ubuntu 7.04 server running > Dor's 2.6.22-rc3 kernel. > xen.*: > Dom0 is 32 bit Ubuntu 7.04 server running > the 2.6.18 kernel from xen3.1 > > The guest configurations: > All guests/domUs are 512MB, 1 CPU > kvm.rtl: (KVM with emulated RTL8029) > Fedora 7 32 bit guest > Standard 2.6.21-1.3194.fc7 kernel > kvm.pv: (KVM w/Dor's paravirt drivers) > Fedora 7 32 bit guest running > Dor's 2.6.22-rc3 kernel. > xen.pv: (Xen paravirt) > Ubuntu 7.04 server w/2.6.18-xen kernel > xen.um: (Xen HVM with unmodified drivers) > Ubuntu 7.04 server w/2.6.18-xen kernel, > unmodified drivers compiled from xen3.1 > kvm.lo: (Host loopback) > > TCP REQUEST/RESPONSE (Trans. Rate per sec) > size kvm.rtl kvm.pv xen.pv xen.um kvm.lo > 1 2191.47 9533.74 18052.37 13593.58 42400.73 > 64 2184.30 9518.13 17979.93 13557.98 42260.53 > 128 2177.52 9482.45 17940.08 13588.54 40983.90 > 256 2160.49 9465.97 17788.21 13492.42 41170.45 > 512 2130.99 9403.33 17655.11 13489.64 40765.26 > 1024 2074.85 9204.90 17293.06 13572.01 39437.78 > 2048 416.18 4750.41 12907.57 11571.07 37252.42 > 4096 265.22 3691.90 10990.67 9943.64 31905.03 > 8192 116.80 1892.25 8439.83 6604.64 24397.95 > 16384 92.06 1004.58 4535.86 3924.68 17460.30 > > TCP STREAM (Throughput 10^6bits/sec) > size kvm.rtl kvm.pv xen.pv xen.um kvm.lo > 2048 33.06 507.21 555.94 1442.38 5409.73 > 4096 33.16 526.75 848.26 2359.42 6152.48 > 8192 33.13 527.99 997.69 2418.87 7267.73 > 16384 33.08 525.95 1107.64 2379.50 8434.29 > 32768 33.13 525.38 1199.08 2375.81 8857.09 > 65536 33.20 523.39 1255.33 2473.92 9248.35 > 131072 33.11 520.87 1292.54 2605.49 8559.21 > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > kvm-devel mailing list > kvm-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kvm-devel > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
