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    Subject[PATCH v3 00/10] Optimize cgroup context switch
    From
    Avoid iterating over all per-CPU events during cgroup changing context
    switches by organizing events by cgroup.

    To make an efficient set of iterators, introduce a min max heap
    utility with test.

    These patches include a caching algorithm to improve the search for
    the first event in a group by Kan Liang <kan.liang@linux.intel.com> as
    well as rebasing hit "optimize event_filter_match during sched_in"
    from https://lkml.org/lkml/2019/8/7/771.

    The v2 patch set was modified by Peter Zijlstra in his perf/cgroup
    branch:
    https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git

    These patches follow Peter's reorganization and his fixes to the
    perf_cpu_context min_heap storage code.

    Ian Rogers (8):
    lib: introduce generic min max heap
    perf: Use min_max_heap in visit_groups_merge
    perf: Add per perf_cpu_context min_heap storage
    perf/cgroup: Grow per perf_cpu_context heap storage
    perf/cgroup: Order events in RB tree by cgroup id
    perf: simplify and rename visit_groups_merge
    perf: cache perf_event_groups_first for cgroups
    perf: optimize event_filter_match during sched_in

    Kan Liang (1):
    perf/cgroup: Do not switch system-wide events in cgroup switch

    Peter Zijlstra (1):
    perf/cgroup: Reorder perf_cgroup_connect()

    include/linux/min_max_heap.h | 134 +++++++++
    include/linux/perf_event.h | 14 +
    kernel/events/core.c | 512 ++++++++++++++++++++++++++++-------
    lib/Kconfig.debug | 10 +
    lib/Makefile | 1 +
    lib/test_min_max_heap.c | 194 +++++++++++++
    6 files changed, 769 insertions(+), 96 deletions(-)
    create mode 100644 include/linux/min_max_heap.h
    create mode 100644 lib/test_min_max_heap.c

    --
    2.24.0.432.g9d3f5f5b63-goog

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