[PATCH v4 00/10] selftests/resctrl: Add resctrl selftest

From: Fenghua Yu
Date: Fri Dec 21 2018 - 19:26:31 EST

With more and more resctrl features are being added by Intel, AMD
and ARM, a test tool is becoming more and more useful to validate
that both hardware and software functionalities work as expected.

We introduce resctrl selftest to cover resctrl features on both
X86 and ARM architectures. It first implements MBM (Memory Bandwidth
Monitoring) and MBA (Memory Bandwidth Allocation) tests. We can enhance
the selftest tool to include more functionality tests in future.

There is an existing resctrl test suite 'intel_cmt_cat'. But the major
purpose of the tool is to test Intel(R) RDT hardware via writing and
reading MSR registers. It does access resctrl file system; but the
functionalities are very limited. And it doesn't support automatic test
and a lot of manual verifications are involved.

So the selftest tool we are introducing here provides a convenient
tool which does automatic resctrl testing, is easily available in kernel
tree, and will be extended to AMD QoS and ARM MPAM.

The selftest tool is in tools/testing/selftests/resctrl in order to have
generic test code for all architectures.

- address comments from Balu and Randy
- Add CAT and CQM tests

- Change code based on comments from Babu Moger
- Remove some unnessary code and use pipe to communicate b/w processes

- Change code based on comments from Babu Moger
- Clean up other places.

Arshiya Hayatkhan Pathan (4):
selftests/resctrl: Add MBM test
selftests/resctrl: Add MBA test
selftests/resctrl Add Cache QoS Monitoring (CQM) selftest
selftests/resctrl: Add Cache Allocation Technology (CAT) selftest

Fenghua Yu (2):
selftests/resctrl: Add README for resctrl tests
selftests/resctrl: Add the test in MAINTAINERS

Sai Praneeth Prakhya (4):
selftests/resctrl: Add basic resctrl file system operations and data
selftests/resctrl: Read memory bandwidth from perf IMC counter and
from resctrl file system
selftests/resctrl: Add callback to start a benchmark
selftests/resctrl: Add built in benchmark

tools/testing/selftests/resctrl/Makefile | 16 +
tools/testing/selftests/resctrl/README | 53 ++
tools/testing/selftests/resctrl/cache.c | 275 +++++++
tools/testing/selftests/resctrl/cat_test.c | 243 ++++++
tools/testing/selftests/resctrl/cqm_test.c | 169 ++++
tools/testing/selftests/resctrl/fill_buf.c | 198 +++++
tools/testing/selftests/resctrl/mba_test.c | 174 +++++
tools/testing/selftests/resctrl/mbm_test.c | 146 ++++
tools/testing/selftests/resctrl/resctrl.h | 104 +++
.../testing/selftests/resctrl/resctrl_tests.c | 175 +++++
tools/testing/selftests/resctrl/resctrl_val.c | 727 ++++++++++++++++++
tools/testing/selftests/resctrl/resctrlfs.c | 643 ++++++++++++++++
13 files changed, 2924 insertions(+)
create mode 100644 tools/testing/selftests/resctrl/Makefile
create mode 100644 tools/testing/selftests/resctrl/README
create mode 100644 tools/testing/selftests/resctrl/cache.c
create mode 100644 tools/testing/selftests/resctrl/cat_test.c
create mode 100644 tools/testing/selftests/resctrl/cqm_test.c
create mode 100644 tools/testing/selftests/resctrl/fill_buf.c
create mode 100644 tools/testing/selftests/resctrl/mba_test.c
create mode 100644 tools/testing/selftests/resctrl/mbm_test.c
create mode 100644 tools/testing/selftests/resctrl/resctrl.h
create mode 100644 tools/testing/selftests/resctrl/resctrl_tests.c
create mode 100644 tools/testing/selftests/resctrl/resctrl_val.c
create mode 100644 tools/testing/selftests/resctrl/resctrlfs.c