On 11/28/14, Markus Armbruster <arm...@redhat.com> wrote: > Ming Lei <ming....@canonical.com> writes: > >> Hi Kevin, >> >> On Wed, Nov 26, 2014 at 10:46 PM, Kevin Wolf <kw...@redhat.com> wrote: >>> This improves the performance of requests because an ACB doesn't need to >>> be allocated on the heap any more. It also makes the code nicer and >>> smaller. >> >> I am not sure it is good way for linux aio optimization: >> >> - for raw image with some constraint, coroutine can be avoided since >> io_submit() won't sleep most of times >> >> - handling one time coroutine takes much time than handling malloc, >> memset and free on small buffer, following the test data: >> >> -- 241ns per coroutine > > What do you mean by "coroutine" here? Create + destroy? Yield?
Please see perf_cost() in tests/test-coroutine.c Thanks, Ming Lei
