MoonGen: A Scriptable High-Speed Packet Generator

We present MoonGen, a flexible high-speed packet generator. It can saturate 10 GbE links with minimum sized packets using only a single CPU core by running on top of the packet processing framework DPDK. Linear multi-core scaling allows for even higher rates: We have tested MoonGen with up to 178.5 Mpps at 120 Gbit/s. We move the whole packet generation logic into user-controlled Lua scripts to achieve the highest possible flexibility. In addition, we utilize hardware features of Intel NICs that have not been used for packet generators previously. A key feature is the measurement of latency with sub-microsecond precision and accuracy by using hardware timestamping capabilities of modern commodity NICs. We address timing issues with software-based packet generators and apply methods to mitigate them with both hardware support on commodity NICs and with a novel method to control the inter-packet gap in software. Features that were previously only possible with hardware-based solutions are now provided by MoonGen on commodity hardware. MoonGen is available as free software under the MIT license at https://github.com/emmericp/MoonGenComment: Published at IMC 201

APPLICATION IN WHICH THE FAILURE OF THE INTEL PRODUCT COULD CREATE A SITUATION WHERE PERSONAL INJURY OR DEATH

Intel may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved " or "undefined. " Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. The information here is subject to change without notice. Do not finalize a design with this information. The Intel ® Xeon ® Processor E5-1600 / E5-2600/E5-4600 Product Families, Intel ® C600 series chipset, and the Intel ® Xeon® Processor E5-1600 / E5-2600/E5-4600 Product Families-based Platform described in this document may contain design defects o

In-Flight Testing of MEMS Pressure Sensors for Flight Loads Determination

The determination and monitoring of structural loads during flight is an important partof every certification program. It must be proved to the certification authorities that the loads occurring during specific flight maneuvers do not exceed the permissible component loads. Usually conventional strain gauges are used to determine structural loads, however an elaborate calibration process is necessary to determine these loads from the measuredstrains. Recent advances in sensor technology allow determining aerodynamic loads directly from pressure distributions measured by MEMS based sensors. When compared to strain gauges this measurement method has several advantages over conventional strain gauges interms of installation and calibration costs. Flight tests were carried out with the DLR researchglider aircraft Discus-2c in order to compare and investigate the loads determined with the two measuring methods. For this purpose a wing glove equipped with 64 MEMS pressure sensors on the airfoil surface was constructed. Different maneuvers with varying loads were performed during the test flights. A first evaluation of steady flight maneuvers shows that theloads determined from the measured pressure distribution are in very good accordance with the ones determined from the strain gauge measurements. This paper gives an overview of the flight test setup and the data analysis process, results from evaluations of trimmed wings-level flight and steady turn maneuvers are presented and discussed