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RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes

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Hello Peterz/Andi,

On Thu, 2 Feb 2017, Luck, Tony wrote:

>>> Nice to have:
>>> 1)      Readout using "perf(1)" [subset of modes that make sense ... tying monitoring
>>> to resctrl file system will make most command line usage of perf(1) close to impossible.
>>
> Vikas is pushing for "-R rdtgroup" ... though our offline discussions included
> overloading "-g" and have perf(1) pick appropriately from cgroups or rdtgroups
> depending on event type.

Assume we build support to monitor the existing resctrl CAT groups like Thomas 
suggested. For the perf interface would 
something like below seems reasonable or a disaster(given that we have a new -R 
option specific to the PMU/which works only on this PMU) ?

# mount -t resctrl resctrl /sys/fs/resctrl
# cd /sys/fs/resctrl
# mkdir p0 p1
# echo "L3:0=3;1=c" > /sys/fs/resctrl/p0/schemata
# echo "L3:0=3;1=3" > /sys/fs/resctrl/p1/schemata

Now monitor the group p1 using perf. perf would have a new option -R to monitor 
the resctrl groups. perf would still have a cqm event like today 
intel_cqm/llc_occupancy which supports however only one mode -R and not any of 
-C,-t,-G etc. So pretty much the -R works like a -G .. except that it works on 
the resctrl fs and not perf_cgroup.
PMU would have a flag to indicate the perf user mode to check only 
the llc_occupancy event is supported for the -R.

# perf stat -e intel_cqm/llc_occupancy -R p1

-Vikas

>
> -Tony
>

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RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-01 21:10 +0100
  Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-02 00:20 +0100
    RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-02 18:40 +0100
    RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-02 20:40 +0100
      RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Shivappa Vikas <vikas.shivappa@intel.com> - 2017-02-02 21:20 +0100
      Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-02 21:30 +0100
        Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-03 00:50 +0100
          Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-03 02:50 +0100
            Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-03 03:20 +0100
              Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-03 19:00 +0100
                Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-03 22:10 +0100
                Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-03 23:30 +0100
                Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Stephane Eranian <eranian@google.com> - 2017-02-07 09:10 +0100
                Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-07 20:10 +0100
                Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Stephane Eranian <eranian@google.com> - 2017-02-08 22:40 +0100
                Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Shivappa Vikas <vikas.shivappa@intel.com> - 2017-02-07 21:30 +0100
    RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-06 20:00 +0100
    RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-06 22:30 +0100
      RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Shivappa Vikas <vikas.shivappa@intel.com> - 2017-02-06 22:40 +0100
        Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-06 22:50 +0100
      Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-06 23:20 +0100
        RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Luck, Tony" <tony.luck@intel.com> - 2017-02-07 00:30 +0100
          Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-07 01:40 +0100
  Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Andi Kleen <andi@firstfloor.org> - 2017-02-02 01:40 +0100
    Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Andi Kleen <andi@firstfloor.org> - 2017-02-02 02:20 +0100
    Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes David Carrillo-Cisneros <davidcc@google.com> - 2017-02-02 02:20 +0100
    RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes "Yu, Fenghua" <fenghua.yu@intel.com> - 2017-02-02 02:30 +0100
      RE: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Shivappa Vikas <vikas.shivappa@intel.com> - 2017-02-02 19:00 +0100

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