mirror of
https://github.com/torvalds/linux.git
synced 2024-11-29 15:41:36 +00:00
2f320911d9
CMT (Cache Monitoring Technology) [1] is a H/W feature that reports cache
occupancy of a process. resctrl selftest suite has a unit test to test CMT
for LLC but the test is named as CQM (Cache Quality Monitoring).
Furthermore, the unit test source file is named as cqm_test.c and several
functions, variables, comments, preprocessors and statements widely use
"cqm" as either suffix or prefix. This rampant misusage of CQM for CMT
might confuse someone who is newly looking at resctrl selftests because
this feature is named CMT in the Intel Software Developer's Manual.
Hence, rename all the occurrences (unit test source file name, functions,
variables, comments and preprocessors) of cqm with cmt.
[1] Please see Intel SDM, Volume 3, chapter 17 and section 18 for more
information on CMT: https://software.intel.com/content/www/us/en/develop/articles/intel-sdm.html
Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
resctrl_tests - resctrl file system test suit
|
|
|
|
Authors:
|
|
Fenghua Yu <fenghua.yu@intel.com>
|
|
Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
|
|
|
|
resctrl_tests tests various resctrl functionalities and interfaces including
|
|
both software and hardware.
|
|
|
|
Currently it supports Memory Bandwidth Monitoring test and Memory Bandwidth
|
|
Allocation test on Intel RDT hardware. More tests will be added in the future.
|
|
And the test suit can be extended to cover AMD QoS and ARM MPAM hardware
|
|
as well.
|
|
|
|
BUILD
|
|
-----
|
|
|
|
Run "make" to build executable file "resctrl_tests".
|
|
|
|
RUN
|
|
---
|
|
|
|
To use resctrl_tests, root or sudoer privileges are required. This is because
|
|
the test needs to mount resctrl file system and change contents in the file
|
|
system.
|
|
|
|
Executing the test without any parameter will run all supported tests:
|
|
|
|
sudo ./resctrl_tests
|
|
|
|
OVERVIEW OF EXECUTION
|
|
---------------------
|
|
|
|
A test case has four stages:
|
|
|
|
- setup: mount resctrl file system, create group, setup schemata, move test
|
|
process pids to tasks, start benchmark.
|
|
- execute: let benchmark run
|
|
- verify: get resctrl data and verify the data with another source, e.g.
|
|
perf event.
|
|
- teardown: umount resctrl and clear temporary files.
|
|
|
|
ARGUMENTS
|
|
---------
|
|
|
|
Parameter '-h' shows usage information.
|
|
|
|
usage: resctrl_tests [-h] [-b "benchmark_cmd [options]"] [-t test list] [-n no_of_bits]
|
|
-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT default benchmark is builtin fill_buf
|
|
-t test list: run tests specified in the test list, e.g. -t mbm, mba, cmt, cat
|
|
-n no_of_bits: run cache tests using specified no of bits in cache bit mask
|
|
-p cpu_no: specify CPU number to run the test. 1 is default
|
|
-h: help
|