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========================================================================
README for mTCP
========================================================================
mTCP is a highly scalable user-level TCP stack for multicore systems.
mTCP source code is distributed under the Modified BSD License. For
more detail, please refer to the LICENSE. The license term of io_engine
driver and ported applications may differ from the mTCP’s.
========================================================================
PREREQUISITE
========================================================================
We require the following libraries to run mTCP.
- libps (PacketShader I/O engine library) OR libdpdk (Intel's DPDK package*) OR netmap driver
- libnuma
- libpthread
- librt
- libgmp (for DPDK/ONVM driver)
Compling PSIO/DPDK/NETMAP/ONVM driver requires kernel headers.
- For Debian/Ubuntu, try apt-get install linux-headers-$(uname -r)
* We have modified the dpdk package to export net_device stat data
(for Intel-based Ethernet adapters only) to the OS. To achieve this, we have
created a new LKM dpdk-iface-kmod. We also
modified mk/rte.app.mk file to ease the compilation process of mTCP applications.
We recommend using our package for DPDK installation.
=======================================================================
CCP support
=======================================================================
Using CCP(https://ccp-project.github.io/) for congestion control (disabled by
default), requires building and running a CCP algorithm. If you would like to
enable CCP (ie. use the internal implementation of Reno), simply run configure
script with --enable-ccp option.
1. Install Rust. Any installation method should be fine. We recommend using
rustup:
curl https://sh.rustup.rs -sSf | sh -- -y -v --default-toolchain nightly
2. Build a CCP algorithm. The generic-cong-avoid(https://github.com/ccp-project/generic-cong-avoid)
package implements standard TCP Reno and Cubic, so this is probably best to
start with. The same steps can be followed to build any of the other
algorithms hosted in the ccp-project(https://github.com/ccp-project) organization, such as
bbr(https://github.com/ccp-project/bbr).
git clone https://github.com/ccp-project/generic-cong-avoid.git
cd generic-cong-avoid
cargo +nightly build
3. Later, after you've built mTCP and started an mTCP application (such as
epserver or perf), you must start the CCP binary you just built. If you
try to start the CCP process *before* running an mTCP application, it will
report a "connection refused" error.
cd generic-cong-avoid
sudo ./target/debug/reno --ipc unix
========================================================================
INCLUDED DIRECTORIES
========================================================================
mtcp - mtcp source code directory
mtcp/src - source code
mtcp/src/include - mTCP’s internal header files
mtcp/lib - library file
mtcp/include - header files that applications will use
io_engine - event-driven packet I/O engine (io_engine)
io_engine/driver - driver source code
io_engine/lib - io_engine library
io_engine/include - io_engine header files
io_engine/samples - sample io_engine applications (not mTCP’s)
dpdk - Intel's Data Plane Development Kit
dpdk/...
apps - mTCP applications
apps/example - example applications (see README)
apps/lighttpd-1.4.32 - mTCP-ported lighttpd (see INSTALL)
apps/apache_benchmark - mTCP-ported apache benchmark (ab) (see README-mtcp)
util - useful source code for applications
config - sample mTCP configuration files (may not be necessary)
========================================================================
INSTALL GUIDES
========================================================================
mTCP can be prepared in three ways.
- PSIO VERSION -
----------------
1. make in io_engine/driver:
# make
- check ps_ixgbe.ko
- please note that psio only runs on linux-2.6.x kernels
(linux-2.6.32 ~ linux-2.6.38)
2. install the driver:
# ./install.py <# cores> <# cores>
- refer to http://shader.kaist.edu/packetshader/io_engine/
- you may need to change the ip address in install.py:46
3. Setup mtcp library:
# ./configure --with-psio-lib=<$path_to_ioengine>
## e.g. ./configure --with-psio-lib=`echo $PWD`/io_engine
# make
- By default, mTCP assumes that there are 16 CPUs in your system.
You can set the CPU limit, e.g. on a 8-core system, by using the following command:
# ./configure --with-psio-lib=`echo $PWD`/io_engine CFLAGS="-DMAX_CPUS=8"
Please note that your NIC should support RSS queues equal to the MAX_CPUS value
(since mTCP expects a one-to-one RSS queue to CPU binding).
- In case `./configure' script prints an error, run the
following command; and then re-do step-3 (configure again):
# autoreconf -ivf
- check libmtcp.a in mtcp/lib
- check header files in mtcp/include
- check example binary files in apps/example
4. Check the configurations in apps/example
- epserver.conf for server-side configuration
- epwget.conf for client-side configuration
- you may write your own configuration file for your application
5. Run the applications!
- DPDK VERSION -
----------------
1. Set up DPDK first.
# bash setup_mtcp_dpdk_env.sh [<path to $RTE_SDK]]
Press [15] to compile x86_64-native-linuxapp-gcc version
Press [18] to install igb_uio driver for Intel NICs
Press [22] to setup 2048 2MB hugepages
Press [24] to register the Ethernet ports
Press [35] to quit the tool
Only those devices will work with DPDK drivers that are listed
on this page: http://dpdk.org/doc/nics. Please make sure that your
NIC is compatible before moving on to the next step.
We use dpdk/ as our DPDK driver. FYI, you can pass a different
dpdk source directory as command line argument.
2. Bring the dpdk compatible interfaces up, and then set RTE_SDK
and RTE_TARGET environment variables. If you are using Intel NICs,
the interfaces will have dpdk prefix.
# sudo ifconfig dpdk0 x.x.x.x netmask 255.255.255.0 up
# export RTE_SDK=`echo $PWD`/dpdk
# export RTE_TARGET=x86_64-native-linuxapp-gcc
3. Setup mtcp library:
# ./configure --with-dpdk-lib=$RTE_SDK/$RTE_TARGET
# make
- By default, mTCP assumes that there are 16 CPUs in your system.
You can set the CPU limit, e.g. on a 32-core system, by using the following command:
# ./configure --with-dpdk-lib=$RTE_SDK/$RTE_TARGET CFLAGS="-DMAX_CPUS=32"
Please note that your NIC should support RSS queues equal to the MAX_CPUS value
(since mTCP expects a one-to-one RSS queue to CPU binding).
- In case `./configure' script prints an error, run the
following command; and then re-do step-4 (configure again):
# autoreconf -ivf
- checksum offloading in the NIC is now ENABLED (by default)!!!
- this only works for dpdk at the moment
- use
./configure --with-dpdk-lib=$RTE_SDK/$RTE_TARGET --disable-hwcsum
to disable checksum offloading.
- check libmtcp.a in mtcp/lib
- check header files in mtcp/include
- check example binary files in apps/example
5. Check the configurations in apps/example
- epserver.conf for server-side configuration
- epwget.conf for client-side configuration
- you may write your own configuration file for your application
6. Run the applications!
7. You can revert back all your changes by running the following script.
# bash setup_linux_env.sh [<path to $RTE_SDK]]
Press [29] to unbind the Ethernet ports
Press [30] to remove igb_uio.ko driver
Press [33] to remove hugepage mappings
Press [34] to quit the tool
- ONVM VERSION -
----------------
~NEW~: Now you can run mTCP applications (server + client) locally.
A local setup is useful when only 1 machine is available for the experiment.
ONVM configurations are placed as `.conf` files in apps/example directory.
ONVM basics are explained in https://github.com/sdnfv/openNetVM.
**Before running the applications make sure that onvm_mgr is running.**
Also, no core overlap between applications and onvm_mgr is allowed.
1. Install openNetVM using the following instructions
https://github.com/sdnfv/openNetVM/blob/master/docs/Install.md
2. Set up the dpdk interfaces:
# bash setup_mtcp_onvm_env.sh
3. Next bring the dpdk-registered interfaces up. This can be setup using:
# sudo ifconfig dpdk0 x.x.x.x netmask 255.255.255.0 up
4. Setup mtcp library
# ./configure --with-dpdk-lib=$<path_to_dpdk> --with-onvm-lib=$<path_to_onvm_lib>
# e.g. ./configure --with-dpdk-lib=$RTE_SDK/$RTE_TARGET --with-onvm-lib=`echo $ONVM_HOME`/onvm
# make
- By default, mTCP assumes that there are 16 CPUs in your system.
You can set the CPU limit, e.g. on a 32-core system, by using the following command:
# ./configure --with-dpdk-lib=$RTE_SDK/$RTE_TARGET --with-onvm-lib=$<path_to_onvm_lib> CFLAGS="-DMAX_CPUS=32"
Please note that your NIC should support RSS queues equal to the MAX_CPUS value
(since mTCP expects a one-to-one RSS queue to CPU binding).
- In case `./configure' script prints an error, run the
following command; and then re-do step-4 (configure again):
# autoreconf -ivf
- checksum offloading in the NIC is now ENABLED (by default)!!!
- this only works for dpdk at the moment
- use
./configure --with-dpdk-lib=$RTE_SDK/$RTE_TARGET --disable-hwcsum
to disable checksum offloading.
- check libmtcp.a in mtcp/lib
- check header files in mtcp/include
- check example binary files in apps/example
5. Check the configurations in apps/example
- epserver.conf for server-side configuration
- epwget.conf for client-side configuration
- you may write your own configuration file for your application
6. Run the applications!
7. You can revert back all your changes by running the following script.
# bash setup_linux_env.sh
Press [29] to unbind the Ethernet ports
Press [30] to remove igb_uio.ko driver
Press [33] to remove hugepage mappings
Press [34] to quit the tool
- Notes -
Once you have started onvm_mgr, sometimes an mTCP application may fail to get launched due
to a error(s) resembling the one mentioned below:
# EAL: FATAL: Cannot init memory
OR
# Cannot mmap memory for rte_config at [0x7ffff7fb6000], got [0x7ffff7e74000] - please use '--base-virtaddr' option
OR
# EAL: Cannot mmap device resource file /sys/bus/pci/devices/0000:06:00.0/resource3 to address: 0x7ffff7ff1000
To prevent this, use the base virtual address parameter to run the ONVM manager(core list arg `0xf8` isn't actually used by mtcp NFs but is required), e.g.:
cd openNetVM/onvm
./go.sh 1,2,3 1 0xf8 -s stdout -a 0x7f000000000
- NETMAP VERSION -
------------------
See README.netmap for details.
========================================================================
TESTED ENVIRONMENTS
========================================================================
mTCP runs on Linux-based operating systems (2.6.x for PSIO) with generic
x86_64 CPUs, but to help evaluation, we provide our tested environments
as follows.
Intel Xeon E5-2690 octacore CPU @ 2.90 GHz
32 GB of RAM (4 memory channels)
10 GbE NIC with Intel 82599 chipset (specifically Intel X520-DA2)
Debian 6.0.7 (Linux 2.6.32-5-amd64)
Intel Core i7-3770 quadcore CPU @ 3.40 GHz
16 GB of RAM (2 memory channels)
10 GbE NIC with Intel 82599 chipset (specifically Intel X520-DA2)
Ubuntu 10.04 (Linux 2.6.32-47)
Event-driven PacketShader I/O engine (extended io_engine-0.2)
- PSIO is currently only compatible with Linux-2.6.
We tested the DPDK version (polling driver) with Linux-3.13.0 kernel.
========================================================================
NOTES
========================================================================
1. mTCP currently runs with fixed memory pools. That means, the size of
TCP receive and send buffers are fixed at the startup and does not
increase dynamically. This could be performance limit to the large
long-lived connections. Be sure to configure the buffer size
appropriately to your size of workload.
2. The client side of mTCP supports mtcp_init_rss() to create an
address pool that can be used to fetch available address space in
O(1). To easily congest the server side, this function should be
called at the application startup.
3. The supported socket options are limited for right now. Please refer
to the mtcp/src/api.c for more detail.
4. The counterpart of mTCP should enable TCP timestamp.
5. mTCP has been tested with the following Ethernet adapters:
1. Intel-82598 ixgbe (Max-queue-limit: 16)
2. Intel-82599 ixgbe (Max-queue-limit: 16)
3. Intel-I350 igb (Max-queue-limit: 08)
4. Intel-X710 i40e (Max-queue-limit: ~)
5. Intel-X722 i40e (Max-queue-limit: ~)
========================================================================
FREQUENTLY ASKED QUESTIONS
========================================================================
1. How can I quit the application?
- Use ^C to gracefully shutdown the application. Two consecutive
^C (separated by 1 sec) will force quit.
2. My application doesn't use the address specified from ifconfig.
- For some Linux distros(e.g. Ubuntu), NetworkManager may re-assign
a different IP address, or delete the assigned IP address.
Disable NetworkManager temporarily if that's the case.
NetworkManager will be re-enabled upon reboot.
# sudo service network-manager stop
3. Can I statically set the routing or arp table?
- Yes, mTCP allows static route and arp configuration. Go to the
config directory and see sample_route.conf or sample_arp.conf.
Copy and adapt it to your condition and link (ln -s) the config
directory to the application directory. mTCP will find
config/route.conf and config/arp.conf for static configuration.
========================================================================
CAUTION
========================================================================
1. Do not remove I/O driver (ps_ixgbe/igb_uio) while running mTCP
applications. The application will panic!
2. Use the ps_ixgbe/dpdk driver contained in this package, not the one
from some other place (e.g., from io_engine github).
========================================================================
Contact: mtcp-user at list.ndsl.kaist.edu
April 2, 2015.
EunYoung Jeong <notav at ndsl.kaist.edu>
M. Asim Jamshed <ajamshed at ndsl.kaist.edu>
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