Date: Mon, 13 Nov 2023 05:11:03 +0100 From: Gordon Bergling <gbe@freebsd.org> To: Zhenlei Huang <zlei@freebsd.org> Cc: Rick Macklem <rick.macklem@gmail.com>, John Baldwin <jhb@freebsd.org>, FreeBSD Current <current@freebsd.org>, gallatin@freebsd.org Subject: Re: KTLS thread on 14.0-RC3 Message-ID: <ZVGh18mYa0uZBfkh@bastion.ttyv0.de> In-Reply-To: <EF0D2F9C-805A-4185-9B61-D640776E64B0@FreeBSD.org> References: <ZT4pKpw35P-J-Q_T@bastion.ttyv0.de> <F6D87896-038C-4152-AFBD-68B0DDC71801@FreeBSD.org> <53AC8651-141E-4950-84D9-FD94E8B353FD@FreeBSD.org> <77952261-2fe0-428e-b72c-d805f0273a76@FreeBSD.org> <CAM5tNy7pdh0R=G4MGvEkOp9xmh_N7coHtRMMt1VZ5rSEWog9KA@mail.gmail.com> <EF0D2F9C-805A-4185-9B61-D640776E64B0@FreeBSD.org>
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Hi, On Wed, Nov 01, 2023 at 09:01:32AM +0800, Zhenlei Huang wrote: > > On Nov 1, 2023, at 8:37 AM, Rick Macklem <rick.macklem@gmail.com> wrote: > > On Tue, Oct 31, 2023 at 10:06 AM John Baldwin <jhb@freebsd.org <mailto:jhb@freebsd.org>> wrote: > >> On 10/30/23 3:41 AM, Zhenlei Huang wrote: > >>>> On Oct 30, 2023, at 12:09 PM, Zhenlei Huang <zlei@FreeBSD.org> wrote: > >>>>> On Oct 29, 2023, at 5:43 PM, Gordon Bergling <gbe@freebsd.org> wrote: > >>>>> > >>>>> Hi, > >>>>> > >>>>> I am currently building a new system, which should be based on 14.0-RELEASE. > >>>>> Therefor I am tracking releng/14.0 since its creation and updating it currently > >>>>> via the usualy buildworld steps. > >>>>> > >>>>> What I have noticed recently is, that the [KTLS] is missing. I have a stable/13 > >>>>> system which shows the [KTLS] thread and a very recent -CURRENT that also shows > >>>>> the [KTLS] thread. > >>>>> > >>>>> The stable/13 and releng/14.0 systems both use the GENERIC kernel, without any > >>>>> custom modifications. > >>>>> > >>>>> Loaded KLDs are also the same. > >>>>> > >>>>> Did I miss something, or is there something in releng/14.0 missing, which > >>>>> is currenlty enabled in stable/13? > >>>> > >>>> KTLS shall still work as intended, the creation of it threads is deferred. Thanks for the information, I wasn't aware of this change. > >>>> See a72ee355646c (ktls: Defer creation of threads and zones until first use) > >>>>> Run ktls_init() when the first KTLS session is created rather than > >>>>> unconditionally during boot. This avoids creating unused threads and > >>>>> allocating unused resources on systems which do not use KTLS. > >>>> > >>>> ``` > >>>> -SYSINIT(ktls, SI_SUB_SMP + 1, SI_ORDER_ANY, ktls_init, NULL); > >>>> ``` > >>> > >>> Seems 14.0 only create one KTLS thread. > >>> > >>> IIRC 13.2 create one thread per core. > >> > >> That part should not be different. There should always be one thread per core. > > Just fyi, I see one thread/core. > > Did you happen to do something like "ps ax" instead of "ps axHl"? > > Yes, I typed "ps auxx". `ps axHl` is the right way to get kernel threads. > Sorry for the noise. > > > > > rick > > ps: I also see a reclaim_0 thread. -- Gordonhelp
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