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    Subject[PATCH v2 00/11] perf: Intel Cache QoS Monitoring support
    Date
    From: Matt Fleming <matt.fleming@intel.com>

    This patch series adds a new PMU driver for the Intel Cache Monitoring
    hardware feature available in Intel Xeon processors, which allows
    monitoring of LLC occupancy on a task, group or system-wide basis.

    The first few patches modify tools/perf to handle per-package counters,
    which necessitates discarding some values when doing per-cpu reads to
    avoid getting duplicate data. The rest add support for the new PMU code.

    I've left a notoriously funky bit of code as the last patch, the RMID
    rotation code, in an attempt to simplify things. Doing the rotation
    provides the ability to multiplex the RMIDs and basically overcome the
    hardware limitation, but the rest of the patches work fine without it.
    But there are a number of scenarios where being able to monitor more
    tasks than RMIDs is extremely useful.

    The series is based on tip/perf/core.

    Changes in v2:

    - Added Jiri Olsa's Acked-by to PATCH 02/11.

    - Use x86_match_cpu() in intel_cqm_init() and make sure we grab the
    hotplug lock to prevent races as pointed out by Andi Kleen in
    PATCH 08/11.

    - Delete a stale comment in commit message of PATCH 10/11.

    Matt Fleming (10):
    perf stat: Fix AGGR_CORE segfault on multi-socket system
    perf tools: Refactor unit and scale function parameters
    perf tools: Parse event per-package info files
    perf: Make perf_cgroup_from_task() global
    perf: Add ->count() function to read per-package counters
    perf: Move cgroup init before PMU ->event_init()
    perf/x86/intel: Add Intel Cache QoS Monitoring support
    perf/x86/intel: Implement LRU monitoring ID allocation for CQM
    perf/x86/intel: Support task events with Intel CQM
    perf/x86/intel: Perform rotation on Intel CQM RMIDs

    Peter P Waskiewicz Jr (1):
    x86: Add support for Intel Cache QoS Monitoring (CQM) detection

    arch/x86/include/asm/cpufeature.h | 9 +-
    arch/x86/include/asm/processor.h | 3 +
    arch/x86/kernel/cpu/Makefile | 2 +-
    arch/x86/kernel/cpu/common.c | 39 +
    arch/x86/kernel/cpu/perf_event_intel_cqm.c | 1171 ++++++++++++++++++++++++++++
    include/linux/perf_event.h | 48 ++
    include/uapi/linux/perf_event.h | 1 +
    kernel/events/core.c | 63 +-
    tools/perf/builtin-stat.c | 81 +-
    tools/perf/util/evsel.c | 6 +-
    tools/perf/util/evsel.h | 8 +-
    tools/perf/util/parse-events.c | 10 +-
    tools/perf/util/pmu.c | 66 +-
    tools/perf/util/pmu.h | 8 +-
    14 files changed, 1446 insertions(+), 69 deletions(-)
    create mode 100644 arch/x86/kernel/cpu/perf_event_intel_cqm.c

    --
    1.9.3



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