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Linux/tools/testing/selftests/resctrl/README

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  1 resctrl_tests - resctrl file system test suit
  2 
  3 Authors:
  4         Fenghua Yu <fenghua.yu@intel.com>
  5         Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
  6 
  7 resctrl_tests tests various resctrl functionalities and interfaces including
  8 both software and hardware.
  9 
 10 Currently it supports Memory Bandwidth Monitoring test and Memory Bandwidth
 11 Allocation test on Intel RDT hardware. More tests will be added in the future.
 12 And the test suit can be extended to cover AMD QoS and ARM MPAM hardware
 13 as well.
 14 
 15 resctrl_tests can be run with or without kselftest framework.
 16 
 17 WITH KSELFTEST FRAMEWORK
 18 =======================
 19 
 20 BUILD
 21 -----
 22 
 23 Build executable file "resctrl_tests" from top level directory of the kernel source:
 24  $ make -C tools/testing/selftests TARGETS=resctrl
 25 
 26 RUN
 27 ---
 28 
 29 Run resctrl_tests as sudo or root since the test needs to mount resctrl file
 30 system and change contents in the file system.
 31 Using kselftest framework will run all supported tests within resctrl_tests:
 32 
 33  $ sudo make -C tools/testing/selftests TARGETS=resctrl run_tests
 34 
 35 More details about kselftest framework can be found in
 36 Documentation/dev-tools/kselftest.rst.
 37 
 38 WITHOUT KSELFTEST FRAMEWORK
 39 ===========================
 40 
 41 BUILD
 42 -----
 43 
 44 Build executable file "resctrl_tests" from this directory(tools/testing/selftests/resctrl/):
 45   $ make
 46 
 47 RUN
 48 ---
 49 
 50 Run resctrl_tests as sudo or root since the test needs to mount resctrl file
 51 system and change contents in the file system.
 52 Executing the test without any parameter will run all supported tests:
 53 
 54  $ sudo ./resctrl_tests
 55 
 56 OVERVIEW OF EXECUTION
 57 =====================
 58 
 59 A test case has four stages:
 60 
 61   - setup: mount resctrl file system, create group, setup schemata, move test
 62     process pids to tasks, start benchmark.
 63   - execute: let benchmark run
 64   - verify: get resctrl data and verify the data with another source, e.g.
 65     perf event.
 66   - teardown: umount resctrl and clear temporary files.
 67 
 68 ARGUMENTS
 69 =========
 70 
 71 Parameter '-h' shows usage information.
 72 
 73 usage: resctrl_tests [-h] [-b "benchmark_cmd [options]"] [-t test list] [-n no_of_bits]
 74         -b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT default benchmark is builtin fill_buf
 75         -t test list: run tests specified in the test list, e.g. -t mbm,mba,cmt,cat
 76         -n no_of_bits: run cache tests using specified no of bits in cache bit mask
 77         -p cpu_no: specify CPU number to run the test. 1 is default
 78         -h: help

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