Re: [dpdk-dev] [PATCH] app/testpmd: support flow aging

[Matan Azrad <matan@mellanox.com>]

Hi

From: Ferruh Yigit
> On 4/26/2020 8:23 AM, Bill Zhou wrote:
> >
> >
> >> -----Original Message-----
> >> From: Ferruh Yigit <ferruh.yigit@intel.com>
> >> Sent: Saturday, April 25, 2020 12:25 AM
> >> To: Bill Zhou <dongz@mellanox.com>; wenzhuo.lu@intel.com;
> >> jingjing.wu@intel.com; bernard.iremonger@intel.com; Ori Kam
> >> <orika@mellanox.com>
> >> Cc: dev@dpdk.org
> >> Subject: Re: [dpdk-dev] [PATCH] app/testpmd: support flow aging
> >>
> >> On 4/24/2020 11:55 AM, Bill Zhou wrote:
> >>> Currently, there is no way to check the aging event or to get the
> >>> current aged flows in testpmd, this patch include those implements,
> >>> it's
> >> included:
> >>> - Registering aging event based on verbose level, when set verbose > 0,
> >>>   will register this event, otherwise, remove this event. In this event
> >>>   only dump one line of log to user there is one aging event coming.
> >>> - Add new command to list all aged flows, meanwhile, we can set
> >> parameter
> >>>   to destroy it.
> >>
> >> Can you please document new feature and command?
> >>
> >> Instead of overloading the 'verbose', what do you think having
> >> explicit command to register aging events? ("flow aged register
> >> <port_id>"?) I think many of the verbose usage won't really interest in
> the flow aging.
> >>
> >
> > Yes, some of the verbose usage indeed not interest in the flow aging.
> > But If we use register or unregister event to one port, sometime, it
> > will repeat many times for every ports.
> > What do you think if we register this event all the time, and
> > introduce new global var from command to control the event export to
> application ?
> >    for example: set aged_flow_event_print_en [0 | 1]
> 
> I am not also sure about registering this event always, you can register for all
> ports with same command, as we do in many commands:
> "flow aged register <port_id>|all"
> 
> When argument is "all" it registers for all ports, when it is a specific port_id,
> registers for that port id.
> And it is good to have 'unregister' command too.

As I can see in testpmd default, it all the time registers to all events..
See register_eth_event_callback.

I suggest to catch the age event in callback and print it only when set aged_flow_event_print_en is on.


Matan


> 
> >
> >>>
> >>> Signed-off-by: Bill Zhou <dongz@mellanox.com>
> >>
> >> <...>