Hello, On Mon, Mar 21, 2011 at 01:24:37PM -0400, Chris Mason wrote: > Very interesting. Ok, I'll definitely rerun my benchmarks as well. I > used dbench extensively during the initial tuning, but you're forcing > the memory low in order to force IO. > > This case doesn't really hammer on the locks, it hammers on the > transition from spinning to blocking. We want also want to compare > dbench entirely in ram, which will hammer on the spinning portion.
Here's re-run of DFL and SIMPLE with the memory restriction lifted. Memory is 4GiB and disk remains mostly idle with all CPUs running full. USER SYSTEM SIRQ CXTSW THROUGHPUT DFL 59898 504517 377 6814245 782.295 SIMPLE 61090 493441 457 1631688 827.751 So, about the same picture. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html