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Groups > linux.kernel > #1211863
| From | Mike Galbraith <umgwanakikbuti@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers |
| Date | 2015-08-24 09:30 +0200 |
| Message-ID | <q0UmC-SN-37@gated-at.bofh.it> (permalink) |
| References | <pXci5-4fP-5@gated-at.bofh.it> <q0wkj-8c-3@gated-at.bofh.it> <q0G0h-5G2-1@gated-at.bofh.it> <q0TJU-8m0-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, 2015-08-24 at 08:44 +0200, Ingo Molnar wrote: > the 'housekeeping CPU' is essentially the boot CPU. Yet we dedicate a full mask to > it (housekeeping_mask - a variable mask to begin with) and recover the > housekeeping CPU via: > > + return cpumask_any_and(housekeeping_mask, cpu_online_mask); There can be, and had better be if box is big, multiple housekeepers. Imagine a NO_HZ_FULL_ALL kernel on an SGI beast from hell. Offloading 8191 CPUs onto poor little CPU0 probably wouldn't work out well :) -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-23 07:50 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-08-23 18:10 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 03:30 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-24 08:50 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 09:30 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-24 09:50 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 10:00 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-24 10:10 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 15:40 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 16:10 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-25 10:30 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-25 15:50 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-28 10:40 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-28 14:40 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-08-24 16:00 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 16:10 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-08-24 17:50 +0200
Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 03:50 +0200
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