On Fri, Jul 29, 2011 at 03:59:53PM +0800, Liu Yuan wrote: > I noted bdrv_aio_multiwrite() do the murging job, but I am not sure Just like I/O schedulers it's actually fairly harmful on high IOPS, low latency devices. I've just started doing a lot of qemu bencharks, and disabling that multiwrite mess alone gives fairly nice speedups. The major issue seems to be additional memory allocations and cache lines - a problem that actually is fairly inherent all over the qemu code. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
