Re: [Linuxptp-users] Fw: “Resource temporarily unavailable” errors during flood ping test

[Richard C. <ric...@gm...>]

On Tue, Oct 30, 2012 at 11:02:21PM +0000, Keller, Jacob E wrote:
> 
> It would take an insane amount of work to move to a model that
> allows receive handling inside sk.c, and I believe it isn't worth
> the effort. I would however like to increase the default
> tx_timestamp_retries value, as 2 tries rarely works for anything
> I've tested, as it generates false positive errors a lot.

Okay, what value is a safe default, in your experience?

> What hardware are you using that doesn't have issues at 2 retries?

The PHYTER almost never loses a Tx time stamp, and the TI CPTS seems
to be working perfectly, too. I don't have the Freescale eTSEC (gianfar)
for testing, but I remember that it always worked, since the Tx time
stamp is delivered into packet buffer's padding.

With the IGB, sometimes it seemed that 2 retries is okay, but
sometimes I needed to ramp this up.

> And have you attempted testing this under moderate stress?

I just retested the PHYTER under a ping flood, and there were no
hiccups. I will test the CPTS again when I get a chance.

Thanks,
Richard