... | ... | @@ -224,7 +224,27 @@ A: You can look at the different version compatibility on the |
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page, you will also find which firmware version is the best to use
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according to your hardware.
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??Author: Benoit Rat, [Seven Solutions](www.sevensols.com??)
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??Author: Benoit Rat, [Seven
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Solutions](www.sevensols.com??)
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### Q: How fast is the overall performance within the WR switch fpga? Is it really 18\*1Gbps?
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A: A good question. It should be and it is meant to be but it's not yet
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possible. The current gateware have the following issues:
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1. It cannot handle well 100% load (so 1Gb/s) traffic even if you have
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only two ports connected, so if port1 talks with port10, only. It is
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ok up to ~90% of traffic load.
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2. It has problems with handling small frames (\<128 bytes) at high
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loads
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3. If you use a large number of ports at the same time (as you
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described), the forwarding performance drops (the load of traffic
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that the switch can forward between each pair of ports drops)
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(as for July 2013, concerning v3.3 and below of gateware, intended to be
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fixed for v4)
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??Author: Maciej Lipinski, [CERN](http://cern.ch??)
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-----
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... | ... | @@ -232,7 +252,7 @@ See also [Frequently Asked Questions about White Rabbit](/FAQwr) |
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-----
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14 June 2013
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24 June 2013
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