Date: Sat, 16 Jul 2022 16:52:28 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Dmitry Chagin <dchagin@freebsd.org> Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Subject: Re: git: fc90f3a28145 - main - ktrace: Increase precision of timestamps. Message-ID: <YtLCnMfU/glHru1j@kib.kiev.ua> In-Reply-To: <202207160950.26G9o2AZ034355@gitrepo.freebsd.org> References: <202207160950.26G9o2AZ034355@gitrepo.freebsd.org>
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On Sat, Jul 16, 2022 at 09:50:02AM +0000, Dmitry Chagin wrote: > The branch main has been updated by dchagin: > > URL: https://cgit.FreeBSD.org/src/commit/?id=fc90f3a28145872afb7106d391bc922572eb2b71 > > commit fc90f3a28145872afb7106d391bc922572eb2b71 > Author: Dmitry Chagin <dchagin@FreeBSD.org> > AuthorDate: 2022-07-16 09:46:12 +0000 > Commit: Dmitry Chagin <dchagin@FreeBSD.org> > CommitDate: 2022-07-16 09:46:12 +0000 > > ktrace: Increase precision of timestamps. > > Replace struct timeval in header with struct timespec. > To differentiate header formats, add a new KTR_VERSIONED flag > set in the header type field similar to the existing KTRDROP flag. > > To make it easier to extend ktrace headers in the future, > extend the existing header with a version field (version 0 is > reserved for older records without KTR_VERSIONED) as well as > new fields holding the thread ID and CPU ID. It would be nice to have a way to force kernel to write v0 format. For instance, one of my usual work flow case is to generate ktrace.out on HEAD and kdump it on stable/13.
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