linux-kernel - RE: [PATCH v2 0/7] x86/resctrl: Add support for Sub-NUMA cluster (SNC) systems

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Message-ID: <TYAPR01MB6330B9B17686EF426D2C3F308B25A@TYAPR01MB6330.jpnprd01.prod.outlook.com>
Date:   Thu, 29 Jun 2023 08:13:50 +0000
From:   "Shaopeng Tan (Fujitsu)" <tan.shaopeng@...itsu.com>
To:     'Tony Luck' <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Peter Newman <peternewman@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        "x86@...nel.org" <x86@...nel.org>
CC:     James Morse <james.morse@....com>,
        Jamie Iles <quic_jiles@...cinc.com>,
        Babu Moger <babu.moger@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "patches@...ts.linux.dev" <patches@...ts.linux.dev>
Subject: RE: [PATCH v2 0/7] x86/resctrl: Add support for Sub-NUMA cluster
 (SNC) systems

Hi tony,

I ran selftest/resctrl in my environment,
CMT test failed when I enabled Sub-NUMA Cluster.

I don't know why it failed yet,
I paste the test results below.

Processer in my environment:
Intel(R) Xeon(R) Gold 6254 CPU @ 3.10GHz

$ sudo make -C tools/testing/selftests/resctrl run_tests
# # Starting CMT test ...
# # Mounting resctrl to "/sys/fs/resctrl"
# # Mounting resctrl to "/sys/fs/resctrl"
# # Cache size :25952256
# # Benchmark PID: 8638
# # Writing benchmark parameters to resctrl FS
# # Checking for pass/fail
# # Fail: Check cache miss rate within 15%
# # Percent diff=21
# # Number of bits: 5
# # Average LLC val: 9216000
# # Cache span (bytes): 11796480
# not ok 3 CMT: test

Best regards,
Shaopeng TAN