Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Thu, 18 Jan 2018 04:04:43 +0100 Frederic Weisbecker wrote: > On Wed, Jan 17, 2018 at 12:38:01PM -0500, Luiz Capitulino wrote: > > On Tue, 16 Jan 2018 23:51:29 +0100 > > Frederic Weisbecker wrote: > > > > > On Tue, Jan 16, 2018 at 11:52:11AM -0500,

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Thu, 18 Jan 2018 04:04:43 +0100 Frederic Weisbecker wrote: > On Wed, Jan 17, 2018 at 12:38:01PM -0500, Luiz Capitulino wrote: > > On Tue, 16 Jan 2018 23:51:29 +0100 > > Frederic Weisbecker wrote: > > > > > On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > > > > On Tue,

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, Jan 17, 2018 at 12:38:01PM -0500, Luiz Capitulino wrote: > On Tue, 16 Jan 2018 23:51:29 +0100 > Frederic Weisbecker wrote: > > > On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > > > On Tue, 16 Jan 2018 16:41:00 +0100 > > > Frederic Weisbecker

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, Jan 17, 2018 at 12:38:01PM -0500, Luiz Capitulino wrote: > On Tue, 16 Jan 2018 23:51:29 +0100 > Frederic Weisbecker wrote: > > > On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > > > On Tue, 16 Jan 2018 16:41:00 +0100 > > > Frederic Weisbecker wrote: > > > > So

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 16 Jan 2018 23:51:29 +0100 Frederic Weisbecker wrote: > On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > > On Tue, 16 Jan 2018 16:41:00 +0100 > > Frederic Weisbecker wrote: > > > So isolcpus= is now the place where we control

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 16 Jan 2018 23:51:29 +0100 Frederic Weisbecker wrote: > On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > > On Tue, 16 Jan 2018 16:41:00 +0100 > > Frederic Weisbecker wrote: > > > So isolcpus= is now the place where we control the isolation features > > > and nohz is

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, 2018-01-17 at 10:32 -0600, Christopher Lameter wrote: > On Wed, 17 Jan 2018, Mike Galbraith wrote: > > > Domain connectivity very much is a property of a set of CPUs, a rather > > important one, and one managed by cpusets.  NOHZ_FULL is a property of > > a set of cpus, thus a most

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, 2018-01-17 at 10:32 -0600, Christopher Lameter wrote: > On Wed, 17 Jan 2018, Mike Galbraith wrote: > > > Domain connectivity very much is a property of a set of CPUs, a rather > > important one, and one managed by cpusets.  NOHZ_FULL is a property of > > a set of cpus, thus a most

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, 17 Jan 2018, Mike Galbraith wrote: > Domain connectivity very much is a property of a set of CPUs, a rather > important one, and one managed by cpusets.  NOHZ_FULL is a property of > a set of cpus, thus a most excellent fit.  Other things are as well. Not sure to what domain refers to in

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, 17 Jan 2018, Mike Galbraith wrote: > Domain connectivity very much is a property of a set of CPUs, a rather > important one, and one managed by cpusets.  NOHZ_FULL is a property of > a set of cpus, thus a most excellent fit.  Other things are as well. Not sure to what domain refers to in

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, 2018-01-17 at 08:51 -0600, Christopher Lameter wrote: > On Tue, 16 Jan 2018, Mike Galbraith wrote: > > > > I tried to remove isolcpus or at least change the way it works so that its > > > effects are reversible (ie: affine the init task instead of isolating > > > domains) > > > but that

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Wed, 2018-01-17 at 08:51 -0600, Christopher Lameter wrote: > On Tue, 16 Jan 2018, Mike Galbraith wrote: > > > > I tried to remove isolcpus or at least change the way it works so that its > > > effects are reversible (ie: affine the init task instead of isolating > > > domains) > > > but that

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 16 Jan 2018, Mike Galbraith wrote: > > I tried to remove isolcpus or at least change the way it works so that its > > effects are reversible (ie: affine the init task instead of isolating > > domains) > > but that got nacked due to the behaviour's expectations for userspace. > > So we

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 16 Jan 2018, Mike Galbraith wrote: > > I tried to remove isolcpus or at least change the way it works so that its > > effects are reversible (ie: affine the init task instead of isolating > > domains) > > but that got nacked due to the behaviour's expectations for userspace. > > So we

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, Jan 16, 2018 at 06:58:18PM +0100, Mike Galbraith wrote: > On Tue, 2018-01-16 at 16:41 +0100, Frederic Weisbecker wrote: > > On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > > > > > Why are extending isolcpus= given that it's a deprecated interface? > > > Some people have

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, Jan 16, 2018 at 06:58:18PM +0100, Mike Galbraith wrote: > On Tue, 2018-01-16 at 16:41 +0100, Frederic Weisbecker wrote: > > On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > > > > > Why are extending isolcpus= given that it's a deprecated interface? > > > Some people have

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > On Tue, 16 Jan 2018 16:41:00 +0100 > Frederic Weisbecker wrote: > > So isolcpus= is now the place where we control the isolation features > > and nohz is one of them. > > That's the part I'm not very sure

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, Jan 16, 2018 at 11:52:11AM -0500, Luiz Capitulino wrote: > On Tue, 16 Jan 2018 16:41:00 +0100 > Frederic Weisbecker wrote: > > So isolcpus= is now the place where we control the isolation features > > and nohz is one of them. > > That's the part I'm not very sure about. We've been

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 2018-01-16 at 16:41 +0100, Frederic Weisbecker wrote: > On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > > > Why are extending isolcpus= given that it's a deprecated interface? > > Some people have already moved away from isolcpus= now, but with this > > new feature they

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 2018-01-16 at 16:41 +0100, Frederic Weisbecker wrote: > On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > > > Why are extending isolcpus= given that it's a deprecated interface? > > Some people have already moved away from isolcpus= now, but with this > > new feature they

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 16 Jan 2018 16:41:00 +0100 Frederic Weisbecker wrote: > On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > > On Thu, 4 Jan 2018 05:25:32 +0100 > > Frederic Weisbecker wrote: > > > > > Ingo, > > > > > > Please pull the

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Tue, 16 Jan 2018 16:41:00 +0100 Frederic Weisbecker wrote: > On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > > On Thu, 4 Jan 2018 05:25:32 +0100 > > Frederic Weisbecker wrote: > > > > > Ingo, > > > > > > Please pull the sched/0hz branch that can be found at: > > > >

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > On Thu, 4 Jan 2018 05:25:32 +0100 > Frederic Weisbecker wrote: > > > Ingo, > > > > Please pull the sched/0hz branch that can be found at: > > > >

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Fri, Jan 12, 2018 at 02:18:13PM -0500, Luiz Capitulino wrote: > On Thu, 4 Jan 2018 05:25:32 +0100 > Frederic Weisbecker wrote: > > > Ingo, > > > > Please pull the sched/0hz branch that can be found at: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > >

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Thu, 4 Jan 2018 05:25:32 +0100 Frederic Weisbecker wrote: > Ingo, > > Please pull the sched/0hz branch that can be found at: > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > sched/0hz > > HEAD:

Re: [GIT PULL] isolation: 1Hz residual tick offloading v3

On Thu, 4 Jan 2018 05:25:32 +0100 Frederic Weisbecker wrote: > Ingo, > > Please pull the sched/0hz branch that can be found at: > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > sched/0hz > > HEAD: 9e932b2cc707209febd130978a5eb9f4a943a3f4 > > -- > Now

[GIT PULL] isolation: 1Hz residual tick offloading v3

Ingo, Please pull the sched/0hz branch that can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git sched/0hz HEAD: 9e932b2cc707209febd130978a5eb9f4a943a3f4 -- Now that scheduler_tick() has become resilient towards the absence of ticks,

[GIT PULL] isolation: 1Hz residual tick offloading v3

Ingo, Please pull the sched/0hz branch that can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git sched/0hz HEAD: 9e932b2cc707209febd130978a5eb9f4a943a3f4 -- Now that scheduler_tick() has become resilient towards the absence of ticks,