Re: [Linuxptp-users] FYI - TX Timestamp Timeout Fix
PTP IEEE 1588 stack for Linux
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From: Richard C. <ric...@gm...> - 2022-07-28 14:28:02
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On Thu, Jul 28, 2022 at 09:31:34AM +0200, Miroslav Lichvar wrote: > On Wed, Jul 27, 2022 at 01:41:23PM -0700, Cliff Spradlin via Linuxptp-users wrote: > > I just wanted to share the results of an investigation on TX timestamp > > timeout problems my project has been experiencing. The tl;dr is that > > the pfifo_fast qdisc suffers from data ordering bugs which can cause > > outgoing packets to get forgotten / stuck in the outgoing buffer. > > Those may have been fixed in newer kernel versions, but my solution > > was to switch to the pfifo qdisc which uses much less sophisticated > > codepaths. > > Very interesting. Thanks for sharing. Yes, and please also share on the netdev list (if you haven't already). Thanks, Richard |