linux-kernel - RE: [PATCH v2 0/8] selftests/resctrl: Add resctrl selftest

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Date:   Mon, 29 Oct 2018 22:56:53 +0000
From:   "Moger, Babu" <Babu.Moger@....com>
To:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, H Peter Anvin <hpa@...or.com>,
        Tony Luck <tony.luck@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Reinette Chatre <reinette.chatre@...el.com>,
        James Morse <james.morse@....com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>,
        Arshiya Hayatkhan Pathan <arshiya.hayatkhan.pathan@...el.com>
CC:     linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 0/8] selftests/resctrl: Add resctrl selftest

Hi Fenghua, 

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org <linux-kernel-
> owner@...r.kernel.org> On Behalf Of Fenghua Yu
> Sent: Thursday, October 25, 2018 6:07 PM
> To: Thomas Gleixner <tglx@...utronix.de>; Ingo Molnar
> <mingo@...hat.com>; H Peter Anvin <hpa@...or.com>; Tony Luck
> <tony.luck@...el.com>; Peter Zijlstra <peterz@...radead.org>; Reinette
> Chatre <reinette.chatre@...el.com>; Moger, Babu
> <Babu.Moger@....com>; James Morse <james.morse@....com>; Ravi V
> Shankar <ravi.v.shankar@...el.com>; Sai Praneeth Prakhya
> <sai.praneeth.prakhya@...el.com>; Arshiya Hayatkhan Pathan
> <arshiya.hayatkhan.pathan@...el.com>
> Cc: linux-kernel <linux-kernel@...r.kernel.org>; Fenghua Yu
> <fenghua.yu@...el.com>
> Subject: [PATCH v2 0/8] 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) 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 suit '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:
> v2:
> - Change code based on comments from Babu Moger
> - Clean up other places.
> 
> Arshiya Hayatkhan Pathan (2):
>   selftests/resctrl: Add mbm test
>   selftests/resctrl: Add mba test

I suggest to use MBM and MBA(all caps) while talking about these features.  Same applies in each individual patches.

> 
> 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          |  53 ++
>  tools/testing/selftests/resctrl/fill_buf.c      | 175 ++++++
>  tools/testing/selftests/resctrl/mba_test.c      | 175 ++++++
>  tools/testing/selftests/resctrl/mbm_test.c      | 143 +++++
>  tools/testing/selftests/resctrl/membw.c         | 678
> ++++++++++++++++++++++++
>  tools/testing/selftests/resctrl/resctrl.h       |  88 +++
>  tools/testing/selftests/resctrl/resctrl_tests.c | 138 +++++
>  tools/testing/selftests/resctrl/resctrlfs.c     | 465 ++++++++++++++++
>  10 files changed, 1932 insertions(+)
>  create mode 100644 tools/testing/selftests/resctrl/Makefile
>  create mode 100644 tools/testing/selftests/resctrl/README
>  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/membw.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/resctrlfs.c
> 
> --
> 2.5.0