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https://github.com/clearlinux/kvmtool.git
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Asias He
246c834771
This patch bumps host to guest tcp bandwidth from 1060 Mib/s to 1760 Mib/s, and guest to host tcp bandwidth from 342 Mib/s to 619 Mib/s. ************************* Without TSO and UFO ************************* (guest <- host) root@sid1:~# iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.33.15 port 5001 connected with 192.168.33.2 port 38733 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 1.23 GBytes 1.06 Gbits/sec ^Croot@sid1:~# iperf -s -u ------------------------------------------------------------ Server listening on UDP port 5001 Receiving 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.33.15 port 5001 connected with 192.168.33.2 port 54933 [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec 0.030 ms 0/ 893 (0%) (guest to host) root@sid1:~# iperf -c host ------------------------------------------------------------ Client connecting to host, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.33.15 port 42197 connected with 192.168.33.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 408 MBytes 342 Mbits/sec root@sid1:~# iperf -c host -u ------------------------------------------------------------ Client connecting to host, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.33.15 port 56176 connected with 192.168.33.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec [ 3] Sent 893 datagrams [ 3] Server Report: [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec 0.012 ms 0/ 893 (0%) ************************* With TSO and UFO ************************* (guest <- host) root@sid1:~# iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.33.15 port 5001 connected with 192.168.33.2 port 42767 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 2.05 GBytes 1.76 Gbits/sec root@sid1:~# iperf -s -u ------------------------------------------------------------ Server listening on UDP port 5001 Receiving 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.33.15 port 5001 connected with 192.168.33.2 port 35049 [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec 0.031 ms 0/ 893 (0%) (guest -> host) asias@hj:~$ iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.33.2 port 5001 connected with 192.168.33.15 port 60868 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 738 MBytes 619 Mbits/sec asias@hj:~$ iperf -s -u ------------------------------------------------------------ Server listening on UDP port 5001 Receiving 1470 byte datagrams UDP buffer size: 112 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.33.2 port 5001 connected with 192.168.33.15 port 40602 [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec 0.030 ms 0/ 893 (0%) Signed-off-by: Asias He <asias.hejun@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Native Linux KVM tool ===================== The goal of this tool is to provide a clean, from-scratch, lightweight KVM host tool implementation that can boot Linux guest images (just a hobby, won't be big and professional like QEMU) with no BIOS dependencies and with only the minimal amount of legacy device emulation. Note that this is a development prototype for the time being: there's no networking support and no graphics support, amongst other missing essentials. It's great as a learning tool if you want to get your feet wet in virtualization land: it's only 5 KLOC of clean C code that can already boot a guest Linux image. Right now it can boot a Linux image and provide you output via a serial console, over the host terminal, i.e. you can use it to boot a guest Linux image in a terminal or over ssh and log into the guest without much guest or host side setup work needed. 1. To try out the tool, clone the git repository: git clone git://github.com/penberg/linux-kvm.git or alternatively, if you already have a kernel source tree: git checkout -b kvm/tool git pull git://github.com/penberg/linux-kvm.git 2. Compile the tool: cd tools/kvm && make 3. Download a raw userspace image: wget http://wiki.qemu.org/download/linux-0.2.img.bz2 && bunzip2 linux-0.2.img.bz2 4. Build a kernel with CONFIG_VIRTIO_BLK=y and CONFIG_SERIAL_8250_CONSOLE=y configuration options. Note: also make sure you have CONFIG_EXT2_FS or CONFIG_EXT4_FS if you use the above image. 5. And finally, launch the hypervisor: ./kvm --image=linux-0.2.img --kernel=../../arch/x86/boot/bzImage The tool has been written by Pekka Enberg, Cyrill Gorcunov, and Asias He. Special thanks to Avi Kivity for his help on KVM internals and Ingo Molnar for all-around support and encouragement! See the following thread for original discussion for motivation of this project: http://thread.gmane.org/gmane.linux.kernel/962051/focus=962620 Build dependencies ===================== For deb based systems: 32-bit: sudo apt-get install build-essential 64-bit: sudo apt-get install build-essential libc6-dev-i386 For rpm based systems: 32-bit: yum install glibc-devel 64-bit: yum install glibc-devel glibc-devel.i386