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From: bugzilla-daemon@bugzilla.kernel.org
To: linux-pm@vger.kernel.org
Subject: [Bug 211305] schedutil selects low P-States on AMD EPYC with frequency invariance
Date: Mon, 15 Feb 2021 15:09:29 +0000	[thread overview]
Message-ID: <bug-211305-137361-G1GnIh19eR@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-211305-137361@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=211305

--- Comment #17 from Matt McDonald (gardotd426@gmail.com) ---
That does seem to have fixed it:

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq
4854354
3823787
3647266
4016171
3576030
3974600
3816628
3590646
3919312
3626692
3618178
3597246
4367040
3599805
3837612
3874146

cat /proc/cpuinfo | grep MHz
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 4193.751
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000
cpu MHz         : 3800.000

sudo cpupower frequency-info
[sudo] password for matt:
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency:  Cannot determine or is not supported.
  hardware limits: 2.20 GHz - 6.00 GHz
  available frequency steps:  3.80 GHz, 2.80 GHz, 2.20 GHz
  available cpufreq governors: performance schedutil
  current policy: frequency should be within 2.20 GHz and 3.80 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: 3.80 GHz (asserted by call to hardware)
  boost state support:
    Supported: yes
    Active: no
    Boost States: 0
    Total States: 3
    Pstate-P0:  1000MHz
    Pstate-P1:  700MHz
    Pstate-P2:  500MHz


Everything is back to how it should be, only now with assumingly better
schedutil performance (I'll run some benchmarks later). No 6.0GHz reporting and
no being stuck at 2.20GHz. CPU performance under the "performance" governor is
back to where it should be, and I'm boosting up to 4.9-5.0 in single core and
4.8 all-core.

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  parent reply	other threads:[~2021-02-15 15:12 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-21  0:55 [Bug 211305] New: schedutil selects low P-States on AMD EPYC with frequency invariance bugzilla-daemon
2021-01-21  0:57 ` [Bug 211305] " bugzilla-daemon
2021-01-21  0:59 ` bugzilla-daemon
2021-01-21  1:00 ` bugzilla-daemon
2021-01-21  1:03 ` bugzilla-daemon
2021-01-27 21:18 ` bugzilla-daemon
2021-02-12 17:28 ` bugzilla-daemon
2021-02-12 18:19   ` Rafael J. Wysocki
2021-02-12 18:19 ` bugzilla-daemon
2021-02-12 19:12 ` bugzilla-daemon
2021-02-12 20:39 ` bugzilla-daemon
2021-02-12 21:15 ` bugzilla-daemon
2021-02-12 22:00 ` bugzilla-daemon
2021-02-15 13:52 ` bugzilla-daemon
2021-02-15 13:54 ` bugzilla-daemon
2021-02-15 13:55 ` bugzilla-daemon
2021-02-15 14:04 ` bugzilla-daemon
2021-02-15 14:43 ` bugzilla-daemon
2021-02-15 14:47 ` bugzilla-daemon
2021-02-15 15:09 ` bugzilla-daemon [this message]
2021-02-15 15:30 ` bugzilla-daemon

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