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Centralize the _GNU_SOURCE definition to CFLAGS in lib.mk. Remove redundant defines from Makefiles that import lib.mk. Convert any usage of "#define _GNU_SOURCE 1" to "#define _GNU_SOURCE". This uses the form "-D_GNU_SOURCE=", which is equivalent to "#define _GNU_SOURCE". Otherwise using "-D_GNU_SOURCE" is equivalent to "-D_GNU_SOURCE=1" and "#define _GNU_SOURCE 1", which is less commonly seen in source code and would require many changes in selftests to avoid redefinition warnings. Link: https://lkml.kernel.org/r/20240625223454.1586259-2-edliaw@google.com Signed-off-by: Edward Liaw <edliaw@google.com> Suggested-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: André Almeida <andrealmeid@igalia.com> Cc: Darren Hart <dvhart@infradead.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Kees Cook <kees@kernel.org> Cc: Kevin Tian <kevin.tian@intel.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Reinette Chatre <reinette.chatre@intel.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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.
resctrl_tests can be run with or without kselftest framework.
WITH KSELFTEST FRAMEWORK
=======================
BUILD
-----
Build executable file "resctrl_tests" from top level directory of the kernel source:
$ make -C tools/testing/selftests TARGETS=resctrl
RUN
---
Run resctrl_tests as sudo or root since the test needs to mount resctrl file
system and change contents in the file system.
Using kselftest framework will run all supported tests within resctrl_tests:
$ sudo make -C tools/testing/selftests TARGETS=resctrl run_tests
More details about kselftest framework can be found in
Documentation/dev-tools/kselftest.rst.
WITHOUT KSELFTEST FRAMEWORK
===========================
BUILD
-----
Build executable file "resctrl_tests" from this directory(tools/testing/selftests/resctrl/):
$ make
RUN
---
Run resctrl_tests as sudo or root since 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