Date: Fri, 18 Jun 2021 11:38:18 -0600 From: Warner Losh <wlosh@bsdimp.com> To: John Baldwin <jhb@FreeBSD.org> Cc: Eugene Grosbein <eugen@grosbein.net>, Warner Losh <imp@FreeBSD.org>, "src-committers@freebsd.org" <src-committers@FreeBSD.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@FreeBSD.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@FreeBSD.org> Subject: Re: git: 4c0bc591466f - main - man9: add hz(9) and hardclock(9) Message-ID: <F06C8FE9-5DE0-461B-84BB-5E6FBE0F1FCB@bsdimp.com> In-Reply-To: <c8676c23-f2f3-6430-3a48-8696485b591c@FreeBSD.org> References: <202106181443.15IEhn4t010735@gitrepo.freebsd.org> <10df4ab6-bee0-58f5-7d42-92850d526e01@FreeBSD.org> <7c4c7acc-1fe4-28e4-4e1c-c08912eb0f99@grosbein.net> <c8676c23-f2f3-6430-3a48-8696485b591c@FreeBSD.org>
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[-- Attachment #1 --] > On Jun 18, 2021, at 10:49 AM, John Baldwin <jhb@FreeBSD.org> wrote: > > On 6/18/21 8:32 AM, Eugene Grosbein wrote: >> 18.06.2021 22:18, John Baldwin wrote: >>> OTOH, it's >>> also true that there's no real reason for anything outside of the actual timer >>> code to use stathz (or even profhz) unlike 'hz' which is still used to set >>> timeout tick values. >> Not agreed: how do I get reliable per-CPU load stats in userland without sysctl kern.cp_times >> that exports incrementing raw "stathz-tick" counters? I need them to draw per-CPU graphs. > > Hmm, I guess userland needs the resolution of the values in the sysctls, yes. > To be clear, I was not at all saying that cp_times should be removed, only that > very little code in the kernel needs to use the literal C symbol 'stathz' compared > to the C symbol 'hz’. There is some code, so I’ll leave it in the man page, but remove the deprecated comment. I’ve told jhb@ this already, but I’ve started https://reviews.freebsd.org/D30815 to fix things. Warner [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIzBAEBCgAdFiEEIDX4lLAKo898zeG3bBzRKH2wEQAFAmDM2goACgkQbBzRKH2w EQCdsQ//WTwkB7aCzMgOH1IZIpZ/416QkKWmq1C9seRnNBrB5c0PdFlpaPtEqRCx rZklA58HtL+meWvb9chrBH1CK3+LHDATPc1LeiVnjYAlci7rKqtQfUo7TFhwrEaH l7x/S/t1Rj+i1DcgYITY8DdVhoT0ZlAMW82jXcgrO1DxWlkaEmCDkt8sN8wZmVzb Cf8Z+VtdRzV9CwSYyObZiluG51kSW/IhJXl6eLEAPkMEWEFdDTxxGbMk++AWhu+v APkSFyFrAm1+giXHe+GUPn7bl/dZj0kkf4sXgugkznA4CFMJeEOcKaguNF+0NaPo 6B4gz7EkyeTRpR5HnxGl61zDZ7scgzXqI9BTu9C4JT/2AnpZBo+pogKvyZXnuuPP tqdOAGA/yrNJwrqj/dmrQ9FE7dZ20UWLLcOe239mwfV44rcE/prixoVvD7DBlmLc GpdGiyHsVES3wFNcb1IBLmvknF6u3OI765sh+1bCAtsszg1CjxP34lP8KkLa11DT 8onTdKyapjEpY/K8YByot8GVQJ8W+wy+wcYogvCmP0SCMGw14RvJDCGfXdtkBlSu Hm/1nsTkpvY1HqG8+Aoufb4wcUZHG+uV55NrJ2InBiTcThb9LJ/VmhxFdN4MJuxj NA/XZWP3/sA9IiX64LfiXy8RveDjKKPAF1SYc3SXCG8LaS8tfDM= =IDbK -----END PGP SIGNATURE-----
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