Date: Tue, 14 Feb 2023 00:58:41 +0100 From: Mateusz Guzik <mjguzik@gmail.com> To: Jan Beich <jbeich@freebsd.org> Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Subject: Re: git: 48bfd3597654 - main - Add nproc(1) Message-ID: <CAGudoHForbPDR-vzXjKcDJTv=VTj-p=icbfZ2rogPy31r_jL4A@mail.gmail.com> In-Reply-To: <1qmt-6s1w-wny@FreeBSD.org> References: <202302081947.318Jlbt6052826@gitrepo.freebsd.org> <20230208202736.L7hpB%steffen__28609.3347867549$1675888077$gmane$org@sdaoden.eu> <1qmt-6s1w-wny@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2/14/23, Jan Beich <jbeich@freebsd.org> wrote:
> Steffen Nurpmeso <steffen@sdaoden.eu> writes:
>
>> |+ if (all_flag) {
>> |+ cpus = sysconf(_SC_NPROCESSORS_ONLN);
>>
>> is not compatible -- note i like the FreeBSD way better, and maybe
>> someone should make a bug report even.
>>
>> #?0|kent:$ getconf -a|grep NPROC
>> _NPROCESSORS_CONF 8
>> _NPROCESSORS_ONLN 4
>
> See also https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230330
>
> $ cpuset -l 2-5 -- getconf -a | fgrep _NPROC
> _NPROCESSORS_CONF: 8
> _NPROCESSORS_ONLN: 4
>
As I mentioned previously in the thread, on linux these *don't* react
to cpusets (or tasksets in linux parlance):
$ getconf -a | grep _NPROC
_NPROCESSORS_CONF 4
_NPROCESSORS_ONLN 4
$ taskset --cpu-list 0 getconf -a | grep _NPROC
_NPROCESSORS_CONF 4
_NPROCESSORS_ONLN 4
consequently the patch proposed in the bz would introduce an
incompatibility with linux
--
Mateusz Guzik <mjguzik gmail.com>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAGudoHForbPDR-vzXjKcDJTv=VTj-p=icbfZ2rogPy31r_jL4A>