tree d613a987f8265b4c2f35dde9d07f6f026398532a
parent e79d0aeff3b53a115780cecd61199cc40894e4aa
author Pattara Teerapong <pteerapong@chromium.org> 1683013340 +0000
committer Chromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com> 1683709536 +0000

cyclic_bench: Support Intel heterogeneous CPU

Current cyclic_bench test support ARM heterogeneous CPU affinity using
'CPU part' from cpuinfo to get the CPU ID range of small/big cores.
Intel CPU doesn't have this info.

Support detecting heterogeneous CPU by using SMT info. For brya (12th
gen Intel CPU), P-Cores have Hyperthreading while E-Cores don't. Cores
with Hyperthreading will have 2 CPU IDs with the same 'core id' in the
cpuinfo. We use this to support affinity option for brya.

Also fix the existing 'CPU part' implementation missing the last ID.

BUG=b:278007891
TEST=On taniks (brya):
     1. cyclic_bench.py --policy=rr --priority=12 --affinity
        {big_core,small_core}
     2. `ps -T -eo comm,psr` to get the CPU the test is running on
     3. For big_core, CPU ID is in range 0-3
	For small_core, CPU ID is in range 4-7
TEST=On steelix (ARM) same steps as above and check that
     - For big_core, CPU ID is in range 6-7
     - For small_core, CPU ID is in range 0-5
TEST=python3 -m unittest cyclic_bench_unittest

Change-Id: I9478fa80379970539b117a43e4a8d3b1b52c965e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/audiotest/+/4502463
Reviewed-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Commit-Queue: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Auto-Submit: Pattara Teerapong <pteerapong@chromium.org>
Tested-by: Pattara Teerapong <pteerapong@chromium.org>