Date: Wed, 15 Feb 2023 08:08:48 +0100 From: Mateusz Guzik <mjguzik@gmail.com> To: Mark Millard <marklmi@yahoo.com> Cc: dev-commits-src-main@freebsd.org Subject: Re: git: d9d5f2c042a5 - main - cpuset: add --count [changed/broken command line parsing] Message-ID: <CAGudoHETv8i9pWS=x0sx%2B5TGLnWwA%2BsjmpD%2BOC5OZ9J9rThtVw@mail.gmail.com> In-Reply-To: <D2D940CD-B1A0-41B7-8C02-63CA63940525@yahoo.com> References: <D2D940CD-B1A0-41B7-8C02-63CA63940525.ref@yahoo.com> <D2D940CD-B1A0-41B7-8C02-63CA63940525@yahoo.com>
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On 2/15/23, Mark Millard <marklmi@yahoo.com> wrote: > Mateusz Guzik <mjg_at_FreeBSD.org> wrote on > Date: Sat, 04 Feb 2023 17:51:27 UTC : > >> The branch main has been updated by mjg: >> >> URL: >> https://cgit.FreeBSD.org/src/commit/?id=d9d5f2c042a51a9f0dd69eb1fc349efd81ffa483 >> >> commit d9d5f2c042a51a9f0dd69eb1fc349efd81ffa483 >> Author: Mateusz Guzik <mjg@FreeBSD.org> >> AuthorDate: 2023-02-04 17:47:41 +0000 >> Commit: Mateusz Guzik <mjg@FreeBSD.org> >> CommitDate: 2023-02-04 17:50:41 +0000 >> >> cpuset: add --count >> >> Can be used to count the number of hardware threads in the cpu set. >> >> For example: >> $ cpuset -g -p $$ >> pid 2440 mask: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, >> 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, >> 35, 36, 37, 38, 39 >> pid 2440 domain policy: first-touch mask: 0, 1 >> $ cpuset -g --count -p $$ >> 40 >> >> The intent is to replace calls to sysctl hw.ncpu and kern.smp.cpus which >> can be found in the tree, which are not adequate given existence of >> cpusets. >> >> Right now only -g -p combination is supported to reduce complexity. >> As anything else errors out, this can be expanded later as needed. >> >> Differential Revision: https://reviews.freebsd.org/D36351 > > This broke long standing commands sequences in some makefiles > that I use to build and run some benchmarks, the commands > at issue involve use of cpuset. > > However I can show the oddity in a much simpler context: > > # cpuset echo "text" > text > > # cpuset echo "-text" > usage: cpuset [-l cpu-list] [-n policy:domain-list] [-s setid] cmd ... > cpuset [-l cpu-list] [-n policy:domain-list] [-s setid] -p pid > cpuset [-c] [-l cpu-list] [-n policy:domain-list] -C -p pid > cpuset [-c] [-l cpu-list] [-n policy:domain-list] > [-j jailid | -p pid | -t tid | -s setid | -x irq] > cpuset -g [-cir] > [-d domain | -j jailid | -p pid | -t tid | -s setid | -x irq] > cpuset -g --count -p pid > > > By contrast, in my stable/13 context, so, showing the old behavior: > > # cpuset echo "-text" > -text > the idiomatic way to pass progs to spawn is to denote the end of any opts with -- so in particular you would: cpuset -- echo -text the fact that previous version worked without it is kind of a bug -- Mateusz Guzik <mjguzik gmail.com>
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