Re: [PATCH] test/latency: fix intermittent failure on slow platforms

[Thomas Monjalon <thomas@monjalon.net>]

01/06/2026 12:23, Luca Boccassi:
> On Sun, 31 May 2026 at 19:01, Stephen Hemminger
> <stephen@networkplumber.org> wrote:
> >
> > The forwarding loop was bounded by a fixed interval of 0.5ms
> > but on slow or emulated platforms with a low-frequency timebase
> > (e.g. RISC-V rdtime) this fails because the loop only ran once.
> > The test needs two iterations to get any samples.
> >
> > Rearrange the forwarding loop so that a minimum number of iterations
> > are required. The loop still has an upper bound on packets and time
> > interval which is expanded to 10 ms.
> >
> > If no samples are collected, mark the test as skipped.
> > Refactor the forwarding loop test so that cleanup happens on
> > failure.
> >
> > Reported-by: Luca Boccassi <bluca@debian.org>
> > Fixes: b34508b9cbcd ("test/latency: update with more checks")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> > ---
> >  app/test/test_latencystats.c | 75 ++++++++++++++++++++++--------------
> >  1 file changed, 46 insertions(+), 29 deletions(-)
> 
> Thanks, this has been failing consistently in riscv64 since at least
> 25.11, hopefully this makes it stable.
> 
> Acked-by: Luca Boccassi <luca.boccassi@gmail.com>

Applied, thanks.