On Mon, 11 Sep 2023 18:55:45 +0200 Morten Brørup <m...@smartsharesystems.com> wrote:
> > From: Michael Baum [mailto:michae...@nvidia.com] > > Sent: Monday, 11 September 2023 08.42 > > > > Add support for matching random value using new > > "rte_flow_item_random" structure. > > I get it. It can be used for things like stochastic sampling. > > However, it doesn't provide support for e.g. 1/100 or 1/500. > > So here's a suggestion: > > Instead of "value" (which is irrelevant) & "mask" (which is what > really controls the probability), wouldn't it be better if "value" > was an inverse probability (and "mask" was irrelevant)? E.g. > value=500 means that there is a 1 of 500 probability of a match. > > Would this kind of random item better serve the purpose? > > Or is the random item, in its current form, also required for other > purposes? > For netem (Linux kernel) needed to support expressing a percent in fixed point number. The solution was to express it as: Percent = X / UINT32_MAX
