Re: Problem with huge waveforms in EPICS 7

[Michael Davidsaver via Core-talk <core-talk at aps.anl.gov>]

On 6/29/22 23:59, Zimoch Dirk (PSI) wrote:
> On Wed, 2022-06-29 at 10:34 -0700, Michael Davidsaver wrote:
> > On 6/28/22 00:13, Zimoch Dirk (PSI) wrote:
> > > Confirmed with my test setup.
> > Applied as https://github.com/epics-base/epics-base/commit/4df48c91f4e7202899bd859312a2b68148bf0bad
> >
> > I also made a note on the PR
> >
> > https://github.com/epics-base/epics-base/pull/99#discussion_r910230977
> Thanks!
>
> This issue has shown one of the limitations of the ci tests as we have them now: The problem only shows when ioc and
> client run on two different hosts, so that network bandwidth is an issue.
> Is there any way to cover such cases in the test environments?
A more tractable problem would be testing the overflow behavior of dbEvent.

I think this could be accomplished by causing a callback set via
db_add_extra_labor_event() to block on an epicsEvent to prevent the queue
from emptying.  Then post events until the queue overflows.  Then trigger
the epicsEvent, and allow the queue to empty.