Hi Peter,
maybe you missed this previous my response:
20180518133353.GO30654@e110439-lin
?
Would like to have your tought about the concept of "transient maximum
capacity" I was describing...
On 18-May 14:33, Patrick Bellasi wrote:
> On 18-May 13:29, Peter Zijlstra wrote:
> > On Fri, May 18, 2
Hi,
On 18/05/18 12:29, Peter Zijlstra wrote:
> On Fri, May 18, 2018 at 11:57:42AM +0100, Patrick Bellasi wrote:
>> Thus, my simple (maybe dumb) questions are:
>> - why can't we just fold turbo boost frequency into the existing concepts?
>> - what are the limitations of such a "simple" approach?
>
On 18-May 13:29, Peter Zijlstra wrote:
> On Fri, May 18, 2018 at 11:57:42AM +0100, Patrick Bellasi wrote:
> > Thus, my simple (maybe dumb) questions are:
> > - why can't we just fold turbo boost frequency into the existing concepts?
> > - what are the limitations of such a "simple" approach?
>
> P
On Fri, May 18, 2018 at 11:57:42AM +0100, Patrick Bellasi wrote:
> Thus, my simple (maybe dumb) questions are:
> - why can't we just fold turbo boost frequency into the existing concepts?
> - what are the limitations of such a "simple" approach?
Perhaps... but does this not further complicate the
On 17-May 20:28, Peter Zijlstra wrote:
> On Thu, May 17, 2018 at 06:56:37PM +0200, Rafael J. Wysocki wrote:
> > On Thu, May 17, 2018 at 6:42 PM, Srinivas Pandruvada
>
> > > What will happen if we look at all core turbo as max and cap any
> > > utilization above this to 1024?
> >
> > I was going t
On Thu, May 17, 2018 at 8:28 PM, Peter Zijlstra wrote:
> On Thu, May 17, 2018 at 06:56:37PM +0200, Rafael J. Wysocki wrote:
>> On Thu, May 17, 2018 at 6:42 PM, Srinivas Pandruvada
>
>> > What will happen if we look at all core turbo as max and cap any
>> > utilization above this to 1024?
>>
>> I w
On Thu, May 17, 2018 at 06:56:37PM +0200, Rafael J. Wysocki wrote:
> On Thu, May 17, 2018 at 6:42 PM, Srinivas Pandruvada
> > What will happen if we look at all core turbo as max and cap any
> > utilization above this to 1024?
>
> I was going to suggest that.
To the basic premise behind all our
On Thu, May 17, 2018 at 6:42 PM, Srinivas Pandruvada
wrote:
> On Thu, 2018-05-17 at 18:16 +0200, Peter Zijlstra wrote:
>> On Thu, May 17, 2018 at 08:41:32AM -0700, Srinivas Pandruvada wrote:
>> > One more point to note. Even if we calculate some utilization based
>> > on
>> > the freq-invariant an
On Thu, 2018-05-17 at 18:16 +0200, Peter Zijlstra wrote:
> On Thu, May 17, 2018 at 08:41:32AM -0700, Srinivas Pandruvada wrote:
> > One more point to note. Even if we calculate some utilization based
> > on
> > the freq-invariant and arrive at a P-state, we will not be able to
> > control any P-sta
On Thu, May 17, 2018 at 08:41:32AM -0700, Srinivas Pandruvada wrote:
> One more point to note. Even if we calculate some utilization based on
> the freq-invariant and arrive at a P-state, we will not be able to
> control any P-state in turbo region (not even as a cap) on several
> Intel processors
On Thu, 2018-05-17 at 17:04 +0200, Juri Lelli wrote:
> On 17/05/18 12:59, Juri Lelli wrote:
> > On 16/05/18 18:31, Juri Lelli wrote:
> > > On 16/05/18 17:47, Peter Zijlstra wrote:
> > > > On Wed, May 16, 2018 at 05:19:25PM +0200, Juri Lelli wrote:
> > > >
> > > > > Anyway, FWIW I started testing t
On 17/05/18 12:59, Juri Lelli wrote:
> On 16/05/18 18:31, Juri Lelli wrote:
> > On 16/05/18 17:47, Peter Zijlstra wrote:
> > > On Wed, May 16, 2018 at 05:19:25PM +0200, Juri Lelli wrote:
> > >
> > > > Anyway, FWIW I started testing this on a E5-2609 v3 and I'm not seeing
> > > > hackbench regressi
On 16/05/18 18:31, Juri Lelli wrote:
> On 16/05/18 17:47, Peter Zijlstra wrote:
> > On Wed, May 16, 2018 at 05:19:25PM +0200, Juri Lelli wrote:
> >
> > > Anyway, FWIW I started testing this on a E5-2609 v3 and I'm not seeing
> > > hackbench regressions so far (running with schedutil governor).
> >
On Wed, 2018-05-16 at 11:07 +0200, Rafael J. Wysocki wrote:
> On Wed, May 16, 2018 at 9:29 AM, Peter Zijlstra > wrote:
> > On Wed, May 16, 2018 at 09:16:40AM +0200, Peter Zijlstra wrote:
> > > On Tue, May 15, 2018 at 09:49:03PM -0700, Srinivas Pandruvada
> > > wrote:
> > > > intel_pstate has two o
On 16/05/18 17:47, Peter Zijlstra wrote:
> On Wed, May 16, 2018 at 05:19:25PM +0200, Juri Lelli wrote:
>
> > Anyway, FWIW I started testing this on a E5-2609 v3 and I'm not seeing
> > hackbench regressions so far (running with schedutil governor).
>
> https://en.wikipedia.org/wiki/Haswell_(microa
On Wed, 2018-05-16 at 17:19 +0200, Juri Lelli wrote:
> On 15/05/18 21:49, Srinivas Pandruvada wrote:
> > intel_pstate has two operating modes: active and passive. In
> > "active"
> > mode, the in-built scaling governor is used and in "passive" mode,
> > the driver can be used with any governor like
On Wed, May 16, 2018 at 05:19:25PM +0200, Juri Lelli wrote:
> Anyway, FWIW I started testing this on a E5-2609 v3 and I'm not seeing
> hackbench regressions so far (running with schedutil governor).
https://en.wikipedia.org/wiki/Haswell_(microarchitecture)#Server_processors
Lists the E5 2609 v3
On 15/05/18 21:49, Srinivas Pandruvada wrote:
> intel_pstate has two operating modes: active and passive. In "active"
> mode, the in-built scaling governor is used and in "passive" mode,
> the driver can be used with any governor like "schedutil". In "active"
> mode the utilization values from sche
On Wed, May 16, 2018 at 9:29 AM, Peter Zijlstra wrote:
> On Wed, May 16, 2018 at 09:16:40AM +0200, Peter Zijlstra wrote:
>> On Tue, May 15, 2018 at 09:49:03PM -0700, Srinivas Pandruvada wrote:
>> > intel_pstate has two operating modes: active and passive. In "active"
>> > mode, the in-built scalin
On Wed, May 16, 2018 at 09:16:40AM +0200, Peter Zijlstra wrote:
> On Tue, May 15, 2018 at 09:49:03PM -0700, Srinivas Pandruvada wrote:
> > intel_pstate has two operating modes: active and passive. In "active"
> > mode, the in-built scaling governor is used and in "passive" mode,
> > the driver can
On Tue, May 15, 2018 at 09:49:03PM -0700, Srinivas Pandruvada wrote:
> intel_pstate has two operating modes: active and passive. In "active"
> mode, the in-built scaling governor is used and in "passive" mode,
> the driver can be used with any governor like "schedutil". In "active"
> mode the utili
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