Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1594627

RE: [PATCH 1/1] x86/cqm: Cqm requirements

Show all headers | View raw

On Tue, 7 Mar 2017, Luck, Tony wrote:

> > That's all nice and good, but I still have no coherent explanation why
> > measuring across allocation domains makes sense.
> 
> Is this in reaction to this one?
> 
> >> 5)      Put multiple threads into a single measurement group
> 
> If we fix it to say "threads from the same CAT group" does it fix things?
> 
> We'd like to have measurement groups use a single RMID ... if we
> allowed tasks from different CAT groups in the same measurement
> group we wouldn't be able to split the numbers back to report the
> right overall total for each of the CAT groups.

Right. And the same applies to CPU measurements. If we have threads from 3
CAT groups running on a CPU then the aggregate value (except for bandwidth
which can be computed by software) is useless.

Thanks,

	tglx

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

RE: [PATCH 1/1] x86/cqm: Cqm requirements "Luck, Tony" <tony.luck@intel.com> - 2017-03-07 21:10 +0100
  RE: [PATCH 1/1] x86/cqm: Cqm requirements Thomas Gleixner <tglx@linutronix.de> - 2017-03-07 21:50 +0100
  Re: [PATCH 1/1] x86/cqm: Cqm requirements Stephane Eranian <eranian@google.com> - 2017-03-08 00:30 +0100
    Re: [PATCH 1/1] x86/cqm: Cqm requirements Shivappa Vikas <vikas.shivappa@intel.com> - 2017-03-08 01:20 +0100
    Re: [PATCH 1/1] x86/cqm: Cqm requirements Thomas Gleixner <tglx@linutronix.de> - 2017-03-08 10:50 +0100
      Re: [PATCH 1/1] x86/cqm: Cqm requirements David Carrillo-Cisneros <davidcc@google.com> - 2017-03-08 19:00 +0100
        Re: [PATCH 1/1] x86/cqm: Cqm requirements Thomas Gleixner <tglx@linutronix.de> - 2017-03-09 12:10 +0100
          Re: [PATCH 1/1] x86/cqm: Cqm requirements David Carrillo-Cisneros <davidcc@google.com> - 2017-03-09 19:10 +0100
            Re: [PATCH 1/1] x86/cqm: Cqm requirements Thomas Gleixner <tglx@linutronix.de> - 2017-03-10 16:00 +0100
              Re: [PATCH 1/1] x86/cqm: Cqm requirements David Carrillo-Cisneros <davidcc@google.com> - 2017-03-11 03:00 +0100
                Re: [PATCH 1/1] x86/cqm: Cqm requirements Thomas Gleixner <tglx@linutronix.de> - 2017-03-13 20:20 +0100
                Re: [PATCH 1/1] x86/cqm: Cqm requirements David Carrillo-Cisneros <davidcc@google.com> - 2017-03-13 21:10 +0100
                Re: [PATCH 1/1] x86/cqm: Cqm requirements Thomas Gleixner <tglx@linutronix.de> - 2017-03-13 21:30 +0100

csiph-web