how to enable lib_pdump?

[Stephen Hemminger]

On Tue, 18 Jan 2022 10:42:16 -0800
Jon Ross <jonross at gmail.com> wrote:

> dpdk-dumpcap works fine w/ dpdk-testpmd running, but I can't get it to
> work while my app is running.
> 
> The docs say to do it the way testmpd does it. But testpmd does...
> everything? It's hard to tell what's needed to get capture working.
>
You need at a minimum:
  1. primary/secondary process support
  2. ethedev rx/tx callbacks enabled
  3. rte_pdump_init() called in primary
  4. enough shared memory (huge pages) for additional copies.

> The only reference to anything related to lib_pdump in testpmd is the
> call to rte_pdump_init(). But adding this call seems to have no
> effect.
> 
> Just to make sure "it's not me" I added the call to the
> examples/skeleton app, and dpdk-dumpcap will not run w/ the modified
> sample app. So it seems like it's more than just calling
> rte_pdump_init(). Can anyone shed some light on what needs to happen
> to get an app working w/ dpdk-dumpcap?
> 
> I'm using dpdk version v21.11, compile from source via github.
> 
> Thanks,
> -Jon


Most failures are because of doing something that breaks primary/secondary
process support. Like using --in-memory or having a device that won't support
primary/secondary.