Re: [Libguestfs] [PATCH nbdkit 0/7] server: Implement NBD_FLAG_CAN_MULTI_CONN.

On Sat, Jan 05, 2019 at 01:19:50PM +0000, Richard W.M. Jones wrote: FWIW I looked into this case with perf (25 GB of event data!) and there are no obvious candidates for optimization unfortunately. It's about one third spent reading or writing to the Unix domain socket, only about 4% waiting on locks, and the rest of the time either in fio [the test program] or the kernel or doing actual work. In other words, no easy wins ... Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html