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Solarflare VideoSolarflare - What is Kernel Bypass, And Why Is It An Important Concept?
This technique improves Locality of reference and results in higher overall performance, reduced latency and better hardware utilization because of the higher utilization of CPU caches and fewer required context switches.
With multi-queue NICs, additional performance improvements can be achieved by distributing outgoing traffic among different transmit queues.
By assigning different transmit queues to different CPUs or CPU cores, internal operating system contentions can be avoided.
This approach is usually referred to as transmit packet steering XPS. It is primarily used with high-speed network interfaces, such as Gigabit Ethernet and 10 Gigabit Ethernet, for which the processing overhead of the network stack becomes significant.
Some NICs offer integrated field-programmable gate arrays FPGAs for user-programmable processing of network traffic before it reaches the host computer, allowing for significantly reduced latencies in time-sensitive workloads.
This kind of functionality is usually referred to as user-level networking. From Wikipedia, the free encyclopedia. Redirected from Solarflare.
For the British Rail discount card, see Network Railcard. Not to be confused with network interface device. A s Ethernet network interface controller card that connects to the motherboard via the now-obsolete ISA bus.
January 7, TechGenix Ltd. Retrieved Network Computing. Retrieved 19 May June Retrieved November 16, Xeon E5 v3 Grantley Launch.
November 27, Archived from the original PDF on March 26, Retrieved March 26, December 15, February 16, October 14, Retrieved October 11, April Retrieved May 12, Retrieved September 24, Retrieved May 2, Energy in the form of hard x-rays can be damaging to spacecraft electronics and are generally the result of large plasma ejection in the upper chromosphere.
The radiation risks posed by solar flares are a major concern in discussions of a human mission to Mars , the Moon, or other planets. Energetic protons can pass through the human body, causing biochemical damage ,  presenting a hazard to astronauts during interplanetary travel.
Some kind of physical or magnetic shielding would be required to protect the astronauts. Most proton storms take at least two hours from the time of visual detection to reach Earth's orbit.
A solar flare on January 20, released the highest concentration of protons ever directly measured,  giving astronauts as little as 15 minutes to reach shelter.
Flares produce radiation across the electromagnetic spectrum, although with different intensity. They are not very intense in visible light, but they can be very bright at particular atomic lines.
They normally produce bremsstrahlung in X-rays and synchrotron radiation in radio. Richard Carrington observed a flare for the first time on 1 September projecting the image produced by an optical telescope through a broad-band filter.
It was an extraordinarily intense white light flare. Other passband filters are also used. Their discovery did not go public until the end of the conflict.
The same year Southworth also observed the Sun in radio, but as with Hey, his observations were only known after The fast development of radioastronomy revealed new peculiarities of the solar activity like storms and bursts related to the flares.
Today ground-based radiotelescopes observe the Sun from c. Since the beginning of space exploration , telescopes have been sent to space, where they work at wavelengths shorter than UV, which are completely absorbed by the atmosphere, and where flares may be very bright.
Nonetheless, UV observations are today the stars of solar imaging with their incredible fine details that reveal the complexity of the solar corona.
Spacecraft may also bring radio detectors at extremely long wavelengths as long as a few kilometers that cannot propagate through the ionosphere.
In addition to these solar observing facilities, many non-solar astronomical satellites observe flares either intentionally e.
The most powerful flare ever observed was the first one to be observed,  on September 1, , and was reported by British astronomer Richard Carrington and independently by an observer named Richard Hodgson.
The event is named the Solar storm of , or the "Carrington event". The flare was visible to a naked eye in white light , and produced stunning auroras down to tropical latitudes such as Cuba or Hawaii, and set telegraph systems on fire.
The ultra-fast coronal mass ejection of August is suspected of triggering magnetic fuses on naval mines during the Vietnam War , and would have been a life-threatening event to Apollo astronauts if it had occurred during a mission to the Moon.
In modern times, the largest solar flare measured with instruments occurred on November 4, This event saturated the GOES detectors, and because of this its classification is only approximate.
Other large solar flares also occurred on April 2, X20 ,  October 28, X Another X1. The Solar Dynamics Observatory recorded an X9. On July 23, , a massive, potentially damaging, [ vague ] solar storm solar flare, coronal mass ejection and electromagnetic radiation barely missed Earth.
Flare sprays are a type of eruption associated with solar flares. Current methods of flare prediction are problematic, and there is no certain indication that an active region on the Sun will produce a flare.
However, many properties of sunspots and active regions correlate with flaring. For example, magnetically complex regions based on line-of-sight magnetic field called delta spots produce the largest flares.
A simple scheme of sunspot classification due to McIntosh, or related to fractal complexity  is commonly used as a starting point for flare prediction.
The U. From Wikipedia, the free encyclopedia. For the class of stars that undergo similar phenomena, see flare star. For the rose variety, see Rosa 'Sun Flare'.
Play media. Solar flare and its prominence eruption recorded on June 7, by SDO in extreme ultraviolet. Main article: List of solar storms. Solar Physics.
Bibcode : SoPh.. Retrieved May 12, Retrieved May 21, Retrieved 2 June Gordon Cambridge University Press ed. Archived from the original on Retrieved Retrieved: 18 June Retrieved: 15 July National Geophysical Data Center.
Retrieved 22 December Science NASA. New Scientist. Retrieved 8 April Archived from the original PDF on Retrieved 24 November October 25, Space Weather.
Retrieved November 12, The Astrophysical Journal. Bibcode : ApJ Retrieved November 22, Nasa Goddard Space Flight Center. Universe Today.
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July 9, July 12, The Times of India. Retrieved July 15, Retrieved July 17, Sky News. October 24, Retrieved October 24, RT English.
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