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Wysocki'" Cc: "'LKML'" , "'Viresh Kumar'" , "'Srinivas Pandruvada'" , "'Peter Zijlstra'" , "'Giovanni Gherdovich'" , "'Linux PM'" References: <20360841.iInq7taT2Z@kreacher> <3827230.0GnL3RTcl1@kreacher> In-Reply-To: <3827230.0GnL3RTcl1@kreacher> Subject: RE: [PATCH v2 0/3] cpufreq: Allow drivers to receive more information from the governor Date: Thu, 17 Dec 2020 07:26:49 -0800 Message-ID: <000901d6d489$0c26dd50$247497f0$@net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Content-Language: en-ca Thread-Index: AdbSVRA1dBdX0amaSX+eUEzc0wtxAAAF+Myg X-CMAE-Envelope: MS4xfGMNTiXTXTj89gw47y4v0BflAT2x3pkJKtIlYplihKOM21/ediYlkECoDDERqDUTsKlfLXZ54a4BgYvlaYdn1lYRJ/CggHJsRXnE793CaCoiExApGz92 CRdZZxItuloaqyKtG68ZcsBuUj0uS0ZRRdxHo5Rfva/RFcyEXKMmIymzf4HwKPL70Lv6o9k+0ebJzQ4Mdt25oKhPxX77uOhm16tuhmCyD8lcxoY3Rs8n/+ws DHUwkr1Hc9NeFJgBocdu/I1Vq3xsE8JKWK80ACsBuYtxeJFRwqePNoG3nxH9mQLPN8yYNlA0k4pRLi6f1ftlfH6ZvshB5qnm/6rGPpMdVwqQPWf6o5G3UZ+q rSuzb0zqa/rjItHZ1cZ/JrnLsajFWVdGewlFJKUBHyIkiLhMhno= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020.12.14 12:02 Rafael J. Wysocki wrote: > Hi, Hi Rafael, V2 test results below are new, other results are partially re-stated: For readers that do not want to read on, I didn't find anything different than with the other versions. This was more just due diligence. Legend: hwp: Kernel 5.10-rc6, HWP enabled; intel_cpufreq rfc (or rjw): Kernel 5.10-rc6 + this patch set, HWP enabled; intel_cpu-freq; schedutil no-hwp: Kernel 5.10-rc6, HWP disabled; intel_cpu-freq acpi (or acpi-cpufreq): Kernel 5.10-rc6, HWP disabled; acpi-cpufreq; schedutil patch: Kernel 5.10-rc7 + V1 patch set, HWP enabled; intel_cpu-freq; schedutil v2: Kernel 5.10-rc7 + V2 patch set, HWP enabled; intel_cpu-freq; schedutil Fixed work packet, fixed period, periodic workflow, load sweep up/down: load work/sleep frequency: 73 Hertz: hwp: Average: 12.00822 watts rjw: Average: 10.18089 watts no-hwp: Average: 10.21947 watts acpi-cpufreq: Average: 9.06585 watts patch: Average: 10.26060 watts v2: Average: 10.50444 load work/sleep frequency: 113 Hertz: hwp: Average: 12.01056 rjw: Average: 10.12303 no-hwp: Average: 10.08228 acpi-cpufreq: Average: 9.02215 patch: Average: 10.27055 v2: Average: 10.31097 load work/sleep frequency: 211 Hertz: hwp: Average: 12.16067 rjw: Average: 10.24413 no-hwp: Average: 10.12463 acpi-cpufreq: Average: 9.19175 patch: Average: 10.33000 v2: Average: 10.39811 load work/sleep frequency: 347 Hertz: hwp: Average: 12.34169 rjw: Average: 10.79980 no-hwp: Average: 10.57296 acpi-cpufreq: Average: 9.84709 patch: Average: 10.67029 v2: Average: 10.93143 load work/sleep frequency: 401 Hertz: hwp: Average: 12.42562 rjw: Average: 11.12465 no-hwp: Average: 11.24203 acpi-cpufreq: Average: 10.78670 patch: Average: 10.94514 v2: Average: 11.50324 Serialized single threaded via PIDs per second method: A.K.A fixed work packet, variable period Results: Execution times (seconds. Less is better): no-hwp: performance: Samples: 382 ; Average: 10.54450 ; Stand Deviation: 0.01564 ; Maximum: 10.61000 ; Minimum: 10.50000 schedutil: Samples: 293 ; Average: 13.73416 ; Stand Deviation: 0.73395 ; Maximum: 15.46000 ; Minimum: 11.68000 acpi: Samples: 253 ; Average: 15.94889 ; Stand Deviation: 1.28219 ; Maximum: 18.66000 ; Minimum: 12.04000 hwp: schedutil: Samples: 380 ; Average: 10.58287 ; Stand Deviation: 0.01864 ; Maximum: 10.64000 ; Minimum: 10.54000 patch: Samples: 276 ; Average: 14.57029 ; Stand Deviation: 0.89771 ; Maximum: 16.04000 ; Minimum: 11.68000 rfc: Samples: 271 ; Average: 14.86037 ; Stand Deviation: 0.84164 ; Maximum: 16.04000 ; Minimum: 12.21000 v2: Samples: 274 ; Average: 14.67978 ; Stand Deviation: 1.03378 ; Maximum: 16.07000 ; Minimum: 11.43000 Power (watts. More indicates higher CPU frequency and better performance. Sample time = 1 second.): no-hwp: performance: Samples: 4000 ; Average: 25.41355 ; Stand Deviation: 0.22156 ; Maximum: 26.01996 ; Minimum: 24.08807 schedutil: Samples: 4000 ; Average: 12.58863 ; Stand Deviation: 5.48600 ; Maximum: 25.50934 ; Minimum: 7.54559 acpi: Samples: 4000 ; Average: 9.57924 ; Stand Deviation: 5.41157 ; Maximum: 25.06366 ; Minimum: 5.51129 hwp: schedutil: Samples: 4000 ; Average: 25.24245 ; Stand Deviation: 0.19539 ; Maximum: 25.93671 ; Minimum: 24.14746 patch: Samples: 4000 ; Average: 11.07225 ; Stand Deviation: 5.63142 ; Maximum: 24.99493 ; Minimum: 3.67548 rfc: Samples: 4000 ; Average: 10.35842 ; Stand Deviation: 4.77915 ; Maximum: 24.95953 ; Minimum: 7.26202 v2: Samples: 4000 ; Average: 10.98284 ; Stand Deviation: 5.48859 ; Maximum: 25.76331 ; Minimum: 7.53790