Avi Kivity wrote: > Anthony Liguori wrote: >> Rusty Russell wrote: >> >>> From: Paul TBBle Hampson <[EMAIL PROTECTED]> >>> >>> This creates a file in $HOME/.lguest/ to directly back the RAM and >>> DMA memory >>> mappings created by map_zeroed_pages. >>> >> >> I created a test program recently that measured the latency of a >> reads/writes to an mmap() file in /dev/shm and in a normal >> filesystem. Even after unlinking the underlying file, the write >> latency was much better with a mmap()'d file in /dev/shm. >> > > Surely the difference disappears once the pages have been faulted in?
I don't recall. I believe rewrite was okay but initial write was much worse. Regards, Anthony Liguori _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization
