Re: [Libguestfs] [PATCH libnbd 0/2] Avoid lock and error overhead on some calls.

On Thu, May 30, 2019 at 04:35:04PM +0100, Richard W.M. Jones wrote: Is it faster? It's not very clear, but here are some timings. This is with examples/threaded-reads-and-writes with the number of cycles multipled by 100. Before: real 0m27.616s real 0m27.417s real 0m28.396s real 0m28.772s real 0m26.622s After: real 0m23.984s real 0m24.357s real 0m28.294s real 0m27.036s real 0m24.862s The test only calls the nbd_aio_is_* functions in 4 places, but they are called quite often. I think this patch series is good, even if it's not going to fix your 10x slowdown :-/ Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top