linux-kernel - [LKP] [mailbox] afd0b1fb22: kmsg.Error_parsing_PCC_subspaces_from

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Date:   Sun, 30 Sep 2018 11:17:15 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     David Arcari <darcari@...hat.com>
Cc:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Al Stone <ahs3@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [LKP] [mailbox]  afd0b1fb22:
 kmsg.Error_parsing_PCC_subspaces_from_PCCT

FYI, we noticed the following commit (built with gcc-7):

commit: afd0b1fb22269f48d68fdf269891c653818c8047 ("mailbox: PCC: handle parse error")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: ftq
with following parameters:

	nr_task: 100%
	samples: 6000ss
	test: cache
	freq: 20
	ucode: 0x200004d
	cpufreq_governor: performance

test-description: The FTQ benchmarks measure hardware and software interference or 'noise' on a node from the applications perspective.
test-url: https://github.com/rminnich/ftq


on test machine: 104 threads Intel(R) Xeon(R) Platinum 8170 CPU @ 2.10GHz with 192G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




2018-09-21 23:31:26 ./ftq_cache -f 20 -n 6000 -t 104 -a 360448
ticks per ns 2.09508



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen

View attachment "config-4.19.0-rc3-00001-gafd0b1f" of type "text/plain" (167672 bytes)

View attachment "job-script" of type "text/plain" (4639 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (23888 bytes)

View attachment "ftq" of type "text/plain" (84 bytes)

View attachment "job.yaml" of type "text/plain" (3941 bytes)

View attachment "reproduce" of type "text/plain" (316 bytes)