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On Tue, 2005-09-13 at 16:27 -0700, David S. Miller wrote: > From: Ravikiran G Thirumalai <kiran@scalex86.org> > Date: Tue, 13 Sep 2005 16:17:17 -0700 > > > But even 1 Million dst cache entries would be 16+4 MB additional for > > a 4 cpu box....is that too much? > > Absolutely. > > Per-cpu counters are great for things like single instance > statistics et al. But once you start doing them per-object > that's out of control bloat as far as I'm concerned. This is why my original per-cpu allocator patch was damn slow, and GFP_KERNEL only. I wasn't convinced that high-churn objects are a good fit for spreading across cpus. I thought that net devices and modules (which uses a primitive hard-coded "bigref" currently) were a fair uses for bigrefs, though I'd like to see some stats. Cheers, Rusty. -- A bad analogy is like a leaky screwdriver -- Richard Braakman - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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