Re: [Qemu-devel] Help needed: test-qht-par hangs on Travis

[Eduardo Habkost <ehabkost@redhat.com>]

On Mon, Dec 10, 2018 at 05:09:42PM -0200, Eduardo Habkost wrote:
> On Mon, Dec 10, 2018 at 03:34:27PM -0200, Eduardo Habkost wrote:
> > On Mon, Dec 10, 2018 at 12:07:20PM -0500, Emilio G. Cota wrote:
> > > On Mon, Dec 10, 2018 at 14:36:01 -0200, Eduardo Habkost wrote:
> > > > On Sun, Dec 09, 2018 at 05:27:38PM -0500, Emilio G. Cota wrote:
> > > > > Can you try re-running the test, after applying the appended patch?
> > > > > (It disables the "resize" thread.)
> > > > 
> > > > It is running right now, here:
> > > > https://travis-ci.org/ehabkost/qemu-hacks/jobs/466074591
> > > > 
> > > > > 
> > > > > Also, does it reliably hang on Travis, or are these hangs
> > > > > intermittent?
> > > > 
> > > > It can be reproduced reliably.  qemu.git builds are failing since
> > > > Thursday:
> > > > https://travis-ci.org/qemu/qemu/builds
> > > 
> > > I see the build you launched timed out. Can you try the following
> > > patch (after discarding the previous one)? Let's see if just by
> > > disabling the second test we can get the build to move ahead.
> > 
> > I will try it.  I'm not sure yet if it's the first or the second
> > test case timing out.  Maybe the "OK\n" we see in the log file is
> > from another process running in parallel.
> 
> Yeah, I think the first test case is the one hanging:
> 
> https://travis-ci.org/ehabkost/qemu-hacks/jobs/466074591#L7741

Finally found out what's happening:

https://travis-ci.org/ehabkost/qemu-hacks/builds/478025908

sleep(1) is being interrupted before 1 second has elapsed, and
never exits the loop:

    do {
        remaining = sleep(duration);
    } while (remaining);

-- 
Eduardo