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Date:   Wed, 27 Feb 2019 18:07:23 +0000
From:   "Moger, Babu" <Babu.Moger@....com>
To:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        H Peter Anvin <hpa@...or.com>,
        Tony Luck <tony.luck@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Xiaochen Shen <xiaochen.shen@...el.com>,
        Arshiya Hayatkhan Pathan <arshiya.hayatkhan.pathan@...el.com>,
        Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>
CC:     linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v7 00/13] selftests/resctrl: Add resctrl selftest

Patches look good. Tested v7 again on AMD system. Thanks


> -----Original Message-----
> From: Fenghua Yu <fenghua.yu@...el.com>
> Sent: Saturday, February 9, 2019 8:50 PM
> To: Thomas Gleixner <tglx@...utronix.de>; Ingo Molnar
> <mingo@...hat.com>; Borislav Petkov <bp@...en8.de>; H Peter Anvin
> <hpa@...or.com>; Tony Luck <tony.luck@...el.com>; Reinette Chatre
> <reinette.chatre@...el.com>; Ravi V Shankar <ravi.v.shankar@...el.com>;
> Xiaochen Shen <xiaochen.shen@...el.com>; Arshiya Hayatkhan Pathan
> <arshiya.hayatkhan.pathan@...el.com>; Sai Praneeth Prakhya
> <sai.praneeth.prakhya@...el.com>; Moger, Babu <Babu.Moger@....com>
> Cc: linux-kernel <linux-kernel@...r.kernel.org>; Fenghua Yu
> <fenghua.yu@...el.com>
> Subject: [PATCH v7 00/13] selftests/resctrl: Add resctrl selftest
> 
> 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), MBA (Memory Bandwidth Allocation), L3 CAT (Cache Allocation
> Technology), and CQM (Cache QoS Monitoring)  tests. We can enhance
> the selftest tool to include more functionality tests in future.
> 
> The tool has been tested on both Intel RDT and AMD QoS.
> 
> 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.
> 
> Changelog:
> v7:
> - Fix a few warnings when compiling patches separately, pointed by Babu
> 
> v6:
> - Fix a benchmark reading optimized out issue in newer GCC.
> - Fix a few coding style issues.
> - Re-arrange code among patches to make cleaner code. No change in
> patches
> structure.
> 
> v5:
> - Based the v4 patches submitted by Fenghua Yu and added changes to
> support
>   AMD.
> - Changed the function name get_sock_num to get_resource_id. Intel uses
>   socket number for schemata and AMD uses l3 index id. To generalize,
>   changed the function name to get_resource_id.
> - Added the code to detect vendor.
> - Disabled the few tests for AMD where the test results are not clear.
>   Also AMD does not have IMC.
> - Fixed few compile issues.
> - Some cleanup to make each patch independent.
> - Tested the patches on AMD system. Fenghua, Need your help to test on
>   Intel box. Please feel free to change and resubmit if something
>    broken.
> - Here is the link for previous version.
>   https://lore.kernel.org/lkml/1545438038-75107-1-git-send-email-
> fenghua.yu=
> @intel.com/
> 
> v4:
> - address comments from Balu and Randy
> - Add CAT and CQM tests
> 
> v3:
> - Change code based on comments from Babu Moger
> - Remove some unnessary code and use pipe to communicate b/w processes
> 
> v2:
> - 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
> 
> Babu Moger (3):
>   selftests/resctrl: Add vendor detection mechanism
>   selftests/resctrl: Use cache index3 id for AMD schemata masks
>   selftests/resctrl: Disable MBA and MBM tests for AMD
> 
> 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
> 
>  MAINTAINERS                                     |   1 +
>  tools/testing/selftests/resctrl/Makefile        |  16 +
>  tools/testing/selftests/resctrl/README          |  54 ++
>  tools/testing/selftests/resctrl/cache.c         | 274 +++++++++
>  tools/testing/selftests/resctrl/cat_test.c      | 242 ++++++++
>  tools/testing/selftests/resctrl/cqm_test.c      | 173 ++++++
>  tools/testing/selftests/resctrl/fill_buf.c      | 210 +++++++
>  tools/testing/selftests/resctrl/mba_test.c      | 178 ++++++
>  tools/testing/selftests/resctrl/mbm_test.c      | 150 +++++
>  tools/testing/selftests/resctrl/resctrl.h       | 117 ++++
>  tools/testing/selftests/resctrl/resctrl_tests.c | 238 ++++++++
>  tools/testing/selftests/resctrl/resctrl_val.c   | 723
> ++++++++++++++++++++++++
>  tools/testing/selftests/resctrl/resctrlfs.c     | 668
> ++++++++++++++++++++++
>  13 files changed, 3044 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
> 
> --
> 2.7.4

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