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

[Delio B. <dbr...@au...>]

Hello Richard,

On Nov 1, 2012, at 9:53 AM, Richard Cochran <ric...@gm...> wrote:

> 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)

Unfortunately I can trigger this issue (TX timestamp loss) by transferring a large file via ssh on my DM8148 based board (CPSW+CPTS) using the default value for sk_tx_retries. I can enable extra debug flags and investigate if the timestamp is lost at the CPTS level if it's any help.

Regards
--
Delio Brignoli
Audioscience Inc