[PATCH v1 0/6] Thread memory improvements and fixes

From: Ian Rogers <irogers@google.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	 Arnaldo Carvalho de Melo <acme@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	 Mark Rutland <mark.rutland@arm.com>,
	 Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@kernel.org>,  Ian Rogers <irogers@google.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	 Oliver Upton <oliver.upton@linux.dev>,
	Yang Jihong <yangjihong1@huawei.com>,
	 linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	 bpf@vger.kernel.org
Subject: [PATCH v1 0/6] Thread memory improvements and fixes
Date: Tue, 13 Feb 2024 22:37:02 -0800	[thread overview]
Message-ID: <20240214063708.972376-1-irogers@google.com> (raw)

The next 6 patches from:
https://lore.kernel.org/lkml/20240202061532.1939474-1-irogers@google.com/
now the initial maps fixes have landed:
https://lore.kernel.org/all/20240210031746.4057262-1-irogers@google.com/

Separate out and reimplement threads to use a hashmap for lower memory
consumption and faster look up. The fixes a regression in memory usage
where reference count checking switched to using non-invasive tree
nodes.  Reduce threads default size by 32 times and improve locking
discipline. Also, fix regressions where tids had become unordered to
make `perf report --tasks` and `perf trace --summary` output easier to
read.

Ian Rogers (6):
  perf report: Sort child tasks by tid
  perf trace: Ignore thread hashing in summary
  perf machine: Move fprintf to for_each loop and a callback
  perf threads: Move threads to its own files
  perf threads: Switch from rbtree to hashmap
  perf threads: Reduce table size from 256 to 8

 tools/perf/builtin-report.c           | 203 ++++++++-------
 tools/perf/builtin-trace.c            |  41 +--
 tools/perf/util/Build                 |   1 +
 tools/perf/util/bpf_lock_contention.c |   8 +-
 tools/perf/util/machine.c             | 344 +++++++-------------------
 tools/perf/util/machine.h             |  30 +--
 tools/perf/util/rb_resort.h           |   5 -
 tools/perf/util/thread.c              |   2 +-
 tools/perf/util/thread.h              |   6 -
 tools/perf/util/threads.c             | 186 ++++++++++++++
 tools/perf/util/threads.h             |  35 +++
 11 files changed, 464 insertions(+), 397 deletions(-)
 create mode 100644 tools/perf/util/threads.c
 create mode 100644 tools/perf/util/threads.h

-- 
2.43.0.687.g38aa6559b0-goog