Messages in this thread | | | From | Shane Hathaway <> | Subject | Re: [PATCH] e1000 rx buffer allocation | Date | Fri, 27 Aug 2004 20:27:48 -0600 |
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On Friday 27 August 2004 12:36 pm, Chris Leech wrote: > As for moving the allocations out of the hard interrupt context, e1000 > was one of several drivers that tried that a few years back by using > tasklets. What I found is that if you split the allocation from the > receive processing, it's far to easy to generate an interrupt load > which starves the skb allocations. The result is that you > continuously use all of the buffers then stall while they all get > replaced, and performance is horrible. But if the patch works for > your network load ...
We're getting 6000 interrupts per second, but the box handles it with ease. We're getting zero loss now, but I guess with slower hardware or fewer buffers, scheduling would be a problem.
> A better approach for improving jumbo frame allocations might be to > use multiple smaller buffers for each receive, something the PRO/1000 > hardware can do but the e1000 driver has never taken advantage of.
Yes, that would be a far better solution. I had no idea the card could do that. Are there specs on this hardware somewhere? Although my patch works, I don't want to stick with a temporary solution.
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