Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Fri, Sep 04, 2015 at 11:56:33AM -0400, Luiz Capitulino wrote: > On Tue, 1 Sep 2015 22:47:24 +0200 > Frederic Weisbecker wrote: > > > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > > index 8b864ec..0902e4d

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Tue, 1 Sep 2015 22:47:24 +0200 Frederic Weisbecker wrote: > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > index 8b864ec..0902e4d 100644 > > > --- a/kernel/sched/core.c > > > +++ b/kernel/sched/core.c > > > @@

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Tue, 1 Sep 2015 22:47:24 +0200 Frederic Weisbecker wrote: > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > index 8b864ec..0902e4d 100644 > > > --- a/kernel/sched/core.c > > > +++

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Fri, Sep 04, 2015 at 11:56:33AM -0400, Luiz Capitulino wrote: > On Tue, 1 Sep 2015 22:47:24 +0200 > Frederic Weisbecker wrote: > > > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > > index

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Wed, 2015-09-02 at 12:16 -0400, Chris Metcalf wrote: > On 09/02/2015 05:38 AM, Mike Galbraith wrote: > > IMHO, nohz_full -> cpu_isolated_map removal really wants to happen. > > NO_HZ_FULL_ALL currently means "Woohoo, next stop NR_CPUS=0". > > Yeah, the problem seems to be folks who use it as a

RE: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

Christoph Lameter; Paul E . McKenney > Subject: Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers > > On 09/02/2015 05:38 AM, Mike Galbraith wrote: > > IMHO, nohz_full -> cpu_isolated_map removal really wants to happen. > > NO_HZ_FULL_ALL currently means "Wooho

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On 09/02/2015 05:38 AM, Mike Galbraith wrote: IMHO, nohz_full -> cpu_isolated_map removal really wants to happen. NO_HZ_FULL_ALL currently means "Woohoo, next stop NR_CPUS=0". Yeah, the problem seems to be folks who use it as a kind of "hey, maybe this gives me some optimization boost

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Wed, 2015-09-02 at 11:38 +0200, Mike Galbraith wrote: > On Tue, 2015-09-01 at 22:47 +0200, Frederic Weisbecker wrote: > > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > > index 8b864ec..0902e4d 100644 > > > >

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Tue, 2015-09-01 at 22:47 +0200, Frederic Weisbecker wrote: > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > index 8b864ec..0902e4d 100644 > > > --- a/kernel/sched/core.c > > > +++ b/kernel/sched/core.c > > > @@

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On 09/02/2015 05:38 AM, Mike Galbraith wrote: IMHO, nohz_full -> cpu_isolated_map removal really wants to happen. NO_HZ_FULL_ALL currently means "Woohoo, next stop NR_CPUS=0". Yeah, the problem seems to be folks who use it as a kind of "hey, maybe this gives me some optimization boost

RE: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

Christoph Lameter; Paul E . McKenney > Subject: Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers > > On 09/02/2015 05:38 AM, Mike Galbraith wrote: > > IMHO, nohz_full -> cpu_isolated_map removal really wants to happen. > > NO_HZ_FULL_ALL currently means "Wooho

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Wed, 2015-09-02 at 12:16 -0400, Chris Metcalf wrote: > On 09/02/2015 05:38 AM, Mike Galbraith wrote: > > IMHO, nohz_full -> cpu_isolated_map removal really wants to happen. > > NO_HZ_FULL_ALL currently means "Woohoo, next stop NR_CPUS=0". > > Yeah, the problem seems to be folks who use it as a

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Tue, 2015-09-01 at 22:47 +0200, Frederic Weisbecker wrote: > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > index 8b864ec..0902e4d 100644 > > > --- a/kernel/sched/core.c > > > +++ b/kernel/sched/core.c > > > @@

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Wed, 2015-09-02 at 11:38 +0200, Mike Galbraith wrote: > On Tue, 2015-09-01 at 22:47 +0200, Frederic Weisbecker wrote: > > On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > > > index 8b864ec..0902e4d 100644 > > > >

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > index 8b864ec..0902e4d 100644 > > --- a/kernel/sched/core.c > > +++ b/kernel/sched/core.c > > @@ -623,18 +623,21 @@ int get_nohz_timer_target(void) > > int i, cpu =

RE: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

> -Original Message- > From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel- > ow...@vger.kernel.org] On Behalf Of Frederic Weisbecker > Sent: Tuesday, September 1, 2015 7:51 AM > To: Ingo Molnar; Peter Zijlstra > Cc: LKML; Vatika Harlalka; Chris Metcalf; Thomas Gleixner; Preeti U

RE: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

> -Original Message- > From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel- > ow...@vger.kernel.org] On Behalf Of Frederic Weisbecker > Sent: Tuesday, September 1, 2015 7:51 AM > To: Ingo Molnar; Peter Zijlstra > Cc: LKML; Vatika Harlalka; Chris Metcalf; Thomas Gleixner; Preeti U

Re: [PATCH 1/2] nohz: Affine unpinned timers to housekeepers

On Tue, Sep 01, 2015 at 07:14:13PM +, Jiang, Yunhong wrote: > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > index 8b864ec..0902e4d 100644 > > --- a/kernel/sched/core.c > > +++ b/kernel/sched/core.c > > @@ -623,18 +623,21 @@ int get_nohz_timer_target(void) > > int i, cpu =