Re: [DTrace-devel] [PATCH v2] test: Wait for output to flush out in enable_pid

Kris Van Hees
2025-07-29T14:13:29Z

On Tue, Jul 22, 2025 at 02:38:55PM +0100, Nick Alcock via DTrace-devel wrote:
> On 28 Jun 2025, eugene loh said:
>
> > From: Eugene Loh <eugene.loh@oracle.com>
> >
> > Our luck with this test has been quite good, but it sometimes fails
> > to show its last lines of output. That is, we send a USR1 to the
> > trigger processes to set off the final output and we immediately
> > cat the output files. If there is any delay in handling the signal,
> > the last output will be missing.
> >
> > Have the processes terminate themselves when their last output is
> > flushed; then wait for those processes. Also, skip testing altogether if
> > there is only a single processor to run the two, hard-spinning processes.
>
> Yeah, much better design.
>
> > Signed-off-by: Eugene Loh <eugene.loh@oracle.com>
>
> Reviewed-by: Nick Alcock <nick.alcock@oracle.com>

Unfortunately, without this patch the test PASSes for me.
With this patch it FAILs with a time out.

Not sure what is going on, but this needs investigation before the patch can
go in.