On 08/16/2013 05:54 PM, Michael S. Tsirkin wrote: > On Fri, Aug 16, 2013 at 01:16:26PM +0800, Jason Wang wrote: >> > Switch to use vhost_add_used_and_signal_n() to avoid multiple calls to >> > vhost_add_used_and_signal(). With the patch we will call at most 2 times >> > (consider done_idx warp around) compared to N times w/o this patch. >> > >> > Signed-off-by: Jason Wang <[email protected]> > So? Does this help performance then? >
Looks like it can especially when guest does support event index. When guest enable tx interrupt, this can saves us some unnecessary signal to guest. I will do some test. _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
