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>>>>>> Andrew Morton on Wed March 10, 2004 11:56 AM >Jens Axboe <axboe@suse.de> wrote: >> Here's a first cut at killing global plugging of block devices to reduce >> the nasty contention blk_plug_lock caused. This introduceds per-queue >> plugging, controlled by the backing_dev_info. > >This is such an improvement over what we have now it isn't funny. > >Ken, the next -mm is starting to look like linux-3.1.0 so I think it >would be best if you could benchmark Jens's patch against 2.6.4-rc2-mm1. Our latest measurement on the 32P, 1000 disks setup indicates this patch is working as expected performance wise. We saw 200% improvement on the throughput compare to global blk_plug_list. (compare to the per-cpu blk_plug_list, performance is the same). - Ken - 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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