Hi Tinker, On Sat, May 9, 2015 at 9:49 AM, Tinker <ti...@openmailbox.org> wrote: > Hi! > > For an environment with very heavy parallell IO, should the performance be > just as good in a BHyVe guest as in the FreeBSD host environment? > > What I thought of is that I guess within the host environment, the storage > subsystem should have all kinds of optimizations like an internal work queue > that pushes lots of work alinearly/asynchronously to the disk controller and > this way allows it, in turn, to give all its performance. > > Does the virtualized disk interface carry over all that goodness to the > guest? >
bhyve creates 8 worker threads for each virtual disk controller (both ahci and virtio-blk). All guest I/O is handled asynchronously by these worker threads which provide parallelism. > (https://wiki.freebsd.org/bhyve seems to say yes, presuming you configure > BHyVe to run the virtual disk in AHCI mode?) > The wiki is out of date. Since r280037 the virtio-blk emulation also gets the benefits of using the block_if worker threads. best Neel > Thanks! > Tinker > > _______________________________________________ > firstname.lastname@example.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > To unsubscribe, send any mail to > "freebsd-virtualization-unsubscr...@freebsd.org" _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"