Multi-thread consecutive offline benchmark/tests.

Create the multiple thread of the same process profiler-like
(consecutive) offline unwind benchmarks.

The offline unwind dumps/samples gathered/selected for this benchmark are
a few threads with unique stack traces from a Google Maps process to
attempt to mimic a portion of what a profiler like Perfetto or Simpleperf
would encounter when profiling a multi-threaded process.

Benchmarking offline unwinds are critical for performance analysis
regarding potential bottlenecks that affect clients includeing Perfetto
and Simpleperf.

See b/192012600 for additional information regarding these benchmarks.

Bug: 192012600
Test: Benchmarking/test CL. Existing unit tests still pass.
Change-Id: Ia0ea33a2105bfe7c7d1691838e24d9fe76f7e2a7
2 files changed
tree: 6ce3902d5fdea6be37885aa4c0bfbdb7cff9d876
  1. libbacktrace/
  2. libunwindstack/
  3. OWNERS
  4. PREUPLOAD.cfg