Re: iowait stability regressed from kernel 2.6.22 under heavy load of multi-thread aio writing/reading

["rae l" <crquan@gmail.com>]

On Tue, Apr 15, 2008 at 9:37 PM, Jeff Moyer <jmoyer@redhat.com> wrote:
>
> "rae l" <crquan@gmail.com> writes:
[...]
>
>  Why doesn't bisecting work?  Can you provide your test code so others
>  can verify your findings?
just small C programs that use multi pthread aio_write, will be pasted soon,

>
>  > by the way, a question is how to guarantee a kernel not regress under
>  > heavy multi-thread aio writing load? ltp project seems not give the
>  > answer:
>
>  Well, providing your test code would be a step closer to achieving this
>  guarantee.  If it is scriptable, then there is a chance we could
>  integrate it into the aio-dio regression test suite:
>
>   http://git.kernel.org/?p=linux/kernel/git/zab/aio-dio-regress.git;a=summary
this aio-dio-regress.git seems to use linux native aio system-call
interface(shipped with libaio) only? but the POSIX aio (shipped with
librt) implemented with pthread and pwrite system-call tests can also
be added, the librt is the most cases when refered to aio.

However, the test code will come soon.

--
Denis