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Subject[PATCH v5 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.

The v5 patch set renames min_max_heap to min_heap as suggested by
Peter Zijlstra, it also addresses comments around preferring
__always_inline over inline.

The v4 patch set addresses review comments on the v3 patch set by
Peter Zijlstra.

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-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_heap.h | 135 +++++++++
include/linux/perf_event.h | 15 +
kernel/events/core.c | 542 +++++++++++++++++++++++++++++--------
lib/Kconfig.debug | 10 +
lib/Makefile | 1 +
lib/test_min_heap.c | 194 +++++++++++++
6 files changed, 783 insertions(+), 114 deletions(-)
create mode 100644 include/linux/min_heap.h
create mode 100644 lib/test_min_heap.c

--
2.24.0.393.g34dc348eaf-goog

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