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From: Perry Yuan <Perry.Yuan@amd.com>
To: <rafael.j.wysocki@intel.com>, <ray.huang@amd.com>,
	<viresh.kumar@linaro.org>
Cc: <Deepak.Sharma@amd.com>, <Mario.Limonciello@amd.com>,
	<Nathan.Fontenot@amd.com>, <Alexander.Deucher@amd.com>,
	<Shimmer.Huang@amd.com>, <Xiaojian.Du@amd.com>, <Li.Meng@amd.com>,
	<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Perry Yuan <Perry.Yuan@amd.com>
Subject: [RESEND PATCH V2 0/9] Implement AMD Pstate EPP Driver
Date: Tue, 11 Oct 2022 00:22:39 +0800	[thread overview]
Message-ID: <20221010162248.348141-1-Perry.Yuan@amd.com> (raw)

Hi all,

This patchset implements one new AMD CPU frequency driver
"amd-pstate-epp” instance for better performance and power control.
CPPC has a parameter called energy preference performance (EPP).
The EPP is used in the CCLK DPM controller to drive the frequency that a core
is going to operate during short periods of activity.
EPP values will be utilized for different OS profiles (balanced, performance, power savings).

AMD Energy Performance Preference (EPP) provides a hint to the hardware
if software wants to bias toward performance (0x0) or energy efficiency (0xff)
The lowlevel power firmware will calculate the runtime frequency according to the EPP preference 
value. So the EPP hint will impact the CPU cores frequency responsiveness.

We use the RAPL interface with "perf" tool to get the energy data of the package power.
Performance Per Watt (PPW) Calculation:

The PPW calculation is referred by below paper:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsoftware.intel.com%2Fcontent%2Fdam%2Fdevelop%2Fexternal%2Fus%2Fen%2Fdocuments%2Fperformance-per-what-paper.pdf&amp;data=04%7C01%7CPerry.Yuan%40amd.com%7Cac66e8ce98044e9b062708d9ab47c8d8%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637729147708574423%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=TPOvCE%2Frbb0ptBreWNxHqOi9YnVhcHGKG88vviDLb00%3D&amp;reserved=0

Below formula is referred from below spec to measure the PPW:

(F / t) / P = F * t / (t * E) = F / E,

"F" is the number of frames per second.
"P" is power measured in watts.
"E" is energy measured in joules.

Gitsouce Benchmark Data on ROME Server CPU
+------------------------------+------------------------------+------------+------------------+
| Kernel Module                | PPW (1 / s * J)              |Energy(J) | PPW Improvement (%)|
+==============================+==============================+============+==================+
| acpi-cpufreq:schedutil       | 5.85658E-05                  | 17074.8    | base             |
+------------------------------+------------------------------+------------+------------------+
| acpi-cpufreq:ondemand        | 5.03079E-05                  | 19877.6    | -14.10%          |
+------------------------------+------------------------------+------------+------------------+
| acpi-cpufreq:performance     | 5.88132E-05                  | 17003      | 0.42%            |
+------------------------------+------------------------------+------------+------------------+
| amd-pstate:ondemand          | 4.60295E-05                  | 21725.2    | -21.41%          |
+------------------------------+------------------------------+------------+------------------+
| amd-pstate:schedutil         | 4.70026E-05                  | 21275.4    | -19.7%           |
+------------------------------+------------------------------+------------+------------------+
| amd-pstate:performance       | 5.80094E-05                  | 17238.6    | -0.95%           |
+------------------------------+------------------------------+------------+------------------+
| EPP:performance              | 5.8292E-05                   | 17155      | -0.47%           |
+------------------------------+------------------------------+------------+------------------+
| EPP: balance performance:    | 6.71709E-05                  | 14887.4    | 14.69%           |
+------------------------------+------------------------------+------------+------------------+
| EPP:power                    | 6.66951E-05                  | 4993.6     | 13.88%           |
+------------------------------+------------------------------+------------+------------------+

Tbench Benchmark Data on ROME Server CPU
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| Kernel Module                               | PPW MB / (s * J)  |Throughput(MB/s)| Energy (J)|PPW Improvement(%)|
+=============================================+===================+==============+=============+==================+
| acpi_cpufreq: schedutil                     | 46.39             | 17191        | 37057.3     | base             |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| acpi_cpufreq: ondemand                      | 51.51             | 19269.5      | 37406.5     | 11.04 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| acpi_cpufreq: performance                   | 45.96             | 17063.7      | 37123.7     | -0.74 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| EPP:powersave: performance(0)               | 54.46             | 20263.1      | 37205       | 17.87 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| EPP:powersave: balance performance          | 55.03             | 20481.9      | 37221.5     | 19.14 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| EPP:powersave: balance_power                | 54.43             | 20245.9      | 37194.2     | 17.77 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| EPP:powersave: power(255)                   | 54.26             | 20181.7      | 37197.4     | 17.40 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| amd-pstate: schedutil                       | 48.22             | 17844.9      | 37006.6     | 3.80 %           |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| amd-pstate: ondemand                        | 61.30             | 22988        | 37503.4     | 33.72 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+
| amd-pstate: performance                     | 54.52             | 20252.6      | 37147.8     | 17.81 %          |
+---------------------------------------------+-------------------+--------------+-------------+------------------+

changes from v1:
 * rebased to v6.0
 * drive feedbacks from Mario for the suspend/resume patch
 * drive feedbacks from Nathan for the EPP support on msr type
 * fix some typos and code style indent problems
 * update commit comments for patch 4/7
 * change the `epp_enabled` module param name to `epp`
 * set the default epp mode to be false
 * add testing for the x86_energy_perf_policy utility patchset(will
   send that utility patchset with another thread)

Perry Yuan (9):
  ACPI: CPPC: Add AMD pstate energy performance preference cppc control
  cpufreq: amd_pstate: add module parameter to load amd pstate EPP
    driver
  cpufreq: cpufreq: export cpufreq cpu release and acquire
  x86/msr: Add the MSR definition for AMD CPPC boost state
  Documentation: amd-pstate: add EPP profiles introduction
  cpufreq: amd_pstate: add AMD pstate EPP support for shared memory type
    processor
  cpufreq: amd_pstate: add AMD Pstate EPP support for the MSR based
    processors
  cpufreq: amd_pstate: implement amd pstate cpu online and offline
    callback
  cpufreq: amd-pstate: implement suspend and resume callbacks

 Documentation/admin-guide/pm/amd-pstate.rst |  19 +
 arch/x86/include/asm/msr-index.h            |   7 +
 drivers/acpi/cppc_acpi.c                    | 128 ++-
 drivers/cpufreq/amd-pstate.c                | 949 +++++++++++++++++++-
 drivers/cpufreq/cpufreq.c                   |   2 +
 include/acpi/cppc_acpi.h                    |  17 +
 6 files changed, 1115 insertions(+), 7 deletions(-)

-- 
2.34.1


             reply	other threads:[~2022-10-10 16:23 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-10 16:22 Perry Yuan [this message]
2022-10-10 16:22 ` [RESEND PATCH V2 1/9] ACPI: CPPC: Add AMD pstate energy performance preference cppc control Perry Yuan
2022-10-17  9:43   ` Huang Rui
2022-10-10 16:22 ` [RESEND PATCH V2 2/9] cpufreq: amd_pstate: add module parameter to load amd pstate EPP driver Perry Yuan
2022-10-17  9:47   ` Huang Rui
2022-10-20 15:56     ` Yuan, Perry
2022-10-10 16:22 ` [RESEND PATCH V2 3/9] cpufreq: cpufreq: export cpufreq cpu release and acquire Perry Yuan
2022-10-10 16:22 ` [RESEND PATCH V2 4/9] x86/msr: Add the MSR definition for AMD CPPC boost state Perry Yuan
2022-10-17  9:56   ` Huang Rui
2022-10-20 16:01     ` Yuan, Perry
2022-10-20 16:05       ` Limonciello, Mario
2022-10-20 16:08         ` Yuan, Perry
2022-10-21  5:22         ` Huang Rui
2022-10-21  9:37           ` Borislav Petkov
2022-10-24  2:58             ` Yuan, Perry
2022-10-24  2:56           ` Yuan, Perry
2022-10-25  0:32             ` Huang Rui
2022-10-25 13:23               ` Yuan, Perry
2022-10-10 16:22 ` [RESEND PATCH V2 5/9] Documentation: amd-pstate: add EPP profiles introduction Perry Yuan
2022-10-10 16:22 ` [RESEND PATCH V2 6/9] cpufreq: amd_pstate: add AMD pstate EPP support for shared memory type processor Perry Yuan
2022-10-17 10:54   ` Huang Rui
2022-10-20 16:04     ` Yuan, Perry
2022-10-25  0:25       ` Huang Rui
2022-10-10 16:22 ` [RESEND PATCH V2 7/9] cpufreq: amd_pstate: add AMD Pstate EPP support for the MSR based processors Perry Yuan
2022-10-11  2:54   ` Viresh Kumar
2022-10-11  5:45     ` Yuan, Perry
2022-10-17 11:17   ` Huang Rui
2022-10-10 16:22 ` [RESEND PATCH V2 8/9] cpufreq: amd_pstate: implement amd pstate cpu online and offline callback Perry Yuan
2022-10-10 16:22 ` [RESEND PATCH V2 9/9] cpufreq: amd-pstate: implement suspend and resume callbacks Perry Yuan
2022-10-12 12:06 ` [RESEND PATCH V2 0/9] Implement AMD Pstate EPP Driver Russell Haley
2022-10-17  7:40 ` Huang Rui

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