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> I just might have an opportunity to setup a Gentoo |
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> System using 10 G ethernet (fiber). The .39 |
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> kernel lists this hardware [1]. |
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> |
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> Does anyone have any experience with this hardware? |
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> Does it work? Did you make any bandwidth measurements? |
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> What type of fiber (mulimode/singlemode) (ST/SC) did you |
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> use? |
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> |
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> Any comments? Is the kernel a bottleneck or your application? |
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Intel are active in linux kernel development and their linux drivers |
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seem to be very good. |
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|
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When testing Intel copper gig interfaces on an intel firewall (HP |
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DL380G5 8 core box), I was able to send a core to 100% with ~330Mb of |
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small packets. The limiting factor appears to be packet rate, and the |
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consequent processing of interrupts (1 irq to 1 core). I don't think |
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that a 10Gig interface would pass any more than that due to similar |
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limitations. |
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|
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Tweaking the e1000 driver options RxDescriptors, TxDescriptors and |
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RxIntDelay pushed it up to ~350Mb. MSI was enabled so no interrupt |
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sharing. |
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|
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So if you're running normal sized packets, you should be ok. Otherwise |
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you way want to look at what irqbalance can do for you (I didn't try |
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it at the time). |
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|
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Also don't forget stuff like Large Receive Offload in your kernel. |
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