The next 6 patches from: https://lore.kernel.org/lkml/20240202061532.1939474-1-irogers@xxxxxxxxxx/ now the initial maps fixes have landed: https://lore.kernel.org/all/20240210031746.4057262-1-irogers@xxxxxxxxxx/ 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. v2: improve comments and a commit message. 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 | 217 +++++++++------- 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, 477 insertions(+), 398 deletions(-) create mode 100644 tools/perf/util/threads.c create mode 100644 tools/perf/util/threads.h -- 2.44.0.rc1.240.g4c46232300-goog
