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On Tue, 2002-01-29 at 20:26, Andrew Morton wrote: > Just a little word of caution here. Remember the > apache-flock-synchronisation fiasco, where removal > of the BKL halved Apache throughput on 8-way x86. > > This was because the BKL removal turned serialisation > on a quick codepath from a spinlock into a schedule(). I feared this too, but eventually I decided it was worth it and benchmarks backed that up. If nothing else this is yet-another-excuse for locks that can spin-then-sleep. I posted dbench results, which show a positive gain even on 2-way for multiple client loads. Robert Love - 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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