On 1/26/18 2:25 PM, Steve French wrote: > The patch did look like it improves the performance of file copy from > Nautilus when I tried it, but would prefer experimenting tool where I > could measure the improvement more precisely. Is there a good command > line tool which generates splice_write indirectly? As expected cp and > dd don't seem to be affected by this patch. You can use fio with ioengine=splice. Or if you have any sendfile() based tools, that should also do the trick, as sendfile() is just a wrapper around splice. -- Jens Axboe