The modification of the default cpuset (to exclude CPUs 0-9) is done by our local installation. I assume the vanilla FreeBSD 7.3 that we're based on does not monkey with the default cpuset.
I believe modifying your own cpuset is not a privileged operation in FreeBSD. The cpuset executable is not setuid root and is usable by regular users. I think you can move the lstopo process to cpuset 0 (which includes all CPUs) by calling cpuset_setid(), and that should take care of the issue. On Thu, Oct 11, 2012 at 10:13 AM, Brice Goglin <brice.gog...@inria.fr>wrote: > (forwarding your mail to the list, and replying) > > Good to know that it works, thanks for testing. I released 1.5.1rc1 today, > it should work fine as well. > > You say that the cpuset does not contain 0-9 by default on this hardware. > This is something specific to your installation, I guess? Nothing that > happens by default on a default FreeBSD install, right? > > Is the cpuset-modification a root-only operation on FreeBSD? If so lstopo > wouldn't be able to expand the cpuset at startup. > > lstopo has a --whole-system option to ignore such limitations. > Unfortunately the x86 backend that hwloc uses on FreeBSD requires that we > bind to each individual core to get its locality information, so that won't > help unless lstopo can indeed remove the cpuset first. > > Brice > > > > -------- Message original -------- Sujet: Re: [hwloc-users] hwloc 1.5, > freebsd and linux output on the same hardware Date : Thu, 11 Oct 2012 > 10:02:55 -0600 De : Sebastian Kuzminsky > <s...@lineratesystems.com><s...@lineratesystems.com> Pour : > Brice Goglin <brice.gog...@inria.fr> <brice.gog...@inria.fr> > > > Ok, it's our fault, sort of. > > We use cpusets, and by default on this hardware CPUs 0-9 are denied to > most processes (including lstopo). If I explicitly change the cpuset of > lstopo to include CPUs 0-9, it runs correctly. > > Maybe lstopo should expand its cpuset to be fully inclusive at startup? > I'll be happy to test patches if you want. > > > > > On Thu, Oct 11, 2012 at 9:27 AM, Sebastian Kuzminsky < > s...@lineratesystems.com> wrote: > >> On Thu, Oct 11, 2012 at 2:39 AM, Brice Goglin <brice.gog...@inria.fr>wrote: >> >>> Le 06/10/2012 01:03, Sebastian Kuzminsky a écrit : >>> > Hm. It may be that we're doing something funny and reserving those >>> > CPUs. I'll run some tests on Monday and get back to you. >>> >>> (replying outside of the hwloc mailing list) >>> >>> Did you have a chance to look at this? >>> I am about to release a hwloc 1.5.1rc1. It'd be good to get your >>> feedback before we do the final 1.5.1 (likely next week). >>> >> >> Oops, thanks for the reminder... I got side tracked on other stuff, >> but I have some time this morning to devote to this. I'll get back to you >> soon. >> >> >> -- >> Sebastian Kuzminsky >> Sr Software Engineer, Linerate Systems >> >> > > > -- > Sebastian Kuzminsky > Sr Software Engineer, Linerate Systems > > -- Sebastian Kuzminsky Sr Software Engineer, Linerate Systems
