> -----Original Message----- > From: Miroslav Lichvar [mailto:mlich...@redhat.com] > Sent: Thursday, May 10, 2018 3:07 AM > To: Keller, Jacob E <jacob.e.kel...@intel.com> > Cc: linuxptp-devel@lists.sourceforge.net > Subject: Re: [Linuxptp-devel] Delay requests causing ptp4l to miss sync TX > timestamp? > > On Wed, May 09, 2018 at 06:56:33PM +0000, Keller, Jacob E wrote: > > > I tried it again with ptp4l using SW timestamping and it's the same > > > problem appearing at the same rate of requests. Does that mean that > > > the error queue cannot accept a single packet because the buffers are > > > full due to the non-error queue? > > > > Oh. That could explain this. I'm not sure how the error queue works here... > there might be a sysctl value we could set to increase the buffer size and > figure > that out? > > I don't see a sysctl/socket option specific to the error queue. > Increasing the maximum receive buffer with SO_RCVBUFFORCE seems to > help, but it has to be a very large value to prevent any delay request > to be dropped. > > Do you think it would make sense to add a new socket option to reserve > a bit of the receive buffer for the error queue? >
That seems reasonable to me... Thanks, Jake > -- > Miroslav Lichvar ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
