On Fri, Feb 15, 2019 at 04:38:05PM +0000, Dave Watson wrote: > There might also be ways to rearrange the file* struct or fd table so > that we're not taking so many cache misses for sockfd_lookup_light, > since for sockets we don't use most of the file* struct at all. I don't think there's too much opportunity to rearrange the fd table. We go from task_struct->files_struct->fdtable->fd[i]. I have a plan to use the Maple Tree data structure I'm currently working on to change that to task_struct->files_struct->maple_node->fd[i], but it'll be the same number of cache misses.
