Wyes Karny c2adb1877b cpupower: Make TSC read per CPU for Mperf monitor ... System-wide TSC read could cause a drift in C0 percentage calculation. Because if first TSC is read and then one by one mperf is read for all cpus, this introduces drift between mperf reading of later CPUs and TSC reading. To lower this drift read TSC per CPU and also just after mperf read. This technique improves C0 percentage calculation in Mperf monitor. Before fix: (System 100% busy) | Mperf || RAPL || Idle_Stats PKG|CORE| CPU| C0 | Cx | Freq || pack | core || POLL | C1 | C2 0| 0| 0| 87.15| 12.85| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 0| 256| 84.62| 15.38| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 1| 1| 87.15| 12.85| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 1| 257| 84.08| 15.92| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 2| 2| 86.61| 13.39| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 2| 258| 83.26| 16.74| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 3| 3| 86.61| 13.39| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 3| 259| 83.60| 16.40| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 4| 4| 86.33| 13.67| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 4| 260| 83.33| 16.67| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 5| 5| 86.06| 13.94| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 5| 261| 83.05| 16.95| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 6| 6| 85.51| 14.49| 2695||168659003|3970468|| 0.00| 0.00| 0.00 After fix: (System 100% busy) | Mperf || RAPL || Idle_Stats PKG|CORE| CPU| C0 | Cx | Freq || pack | core || POLL | C1 | C2 0| 0| 0| 98.03| 1.97| 2415||163295480|3811189|| 0.00| 0.00| 0.00 0| 0| 256| 98.50| 1.50| 2394||163295480|3811189|| 0.00| 0.00| 0.00 0| 1| 1| 99.99| 0.01| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 1| 257| 99.99| 0.01| 2375||163295480|3811189|| 0.00| 0.00| 0.00 0| 2| 2| 99.99| 0.01| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 2| 258|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 3| 3|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 3| 259| 99.99| 0.01| 2435||163295480|3811189|| 0.00| 0.00| 0.00 0| 4| 4|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 4| 260|100.00| 0.00| 2435||163295480|3811189|| 0.00| 0.00| 0.00 0| 5| 5| 99.99| 0.01| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 5| 261|100.00| 0.00| 2435||163295480|3811189|| 0.00| 0.00| 0.00 0| 6| 6|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 6| 262|100.00| 0.00| 2435||163295480|3811189|| 0.00| 0.00| 0.00 Cc: Thomas Renninger <trenn@suse.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Fixes: 7fe2f6399a ("cpupowerutils - cpufrequtils extended with quite some features") Signed-off-by: Wyes Karny <wyes.karny@amd.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>		2023-05-08 10:46:49 -06:00
..
helpers	cpupower: Add function to print AMD P-State performance capabilities	2022-02-22 18:37:12 -07:00
idle_monitor	cpupower: Make TSC read per CPU for Mperf monitor	2023-05-08 10:46:49 -06:00
builtin.h	cpupower: Introduce powercap intel-rapl library and powercap-info command	2022-11-30 16:48:28 -07:00
cpufreq-info.c	tools/cpupower: Choose base_cpu to display default cpupower details	2022-11-25 10:50:04 -07:00
cpufreq-set.c	cpupower: Provide online and offline CPU information	2020-10-26 13:36:24 -06:00
cpuidle-info.c	tools/cpupower: Choose base_cpu to display default cpupower details	2022-11-25 10:50:04 -07:00
cpuidle-set.c	cpupower: Provide online and offline CPU information	2020-10-26 13:36:24 -06:00
cpupower-info.c	tools/cpupower: Choose base_cpu to display default cpupower details	2022-11-25 10:50:04 -07:00
cpupower-set.c	tools/power/cpupower: Read energy_perf_bias from sysfs	2020-11-16 17:42:12 +01:00
cpupower.c	cpupower: Introduce powercap intel-rapl library and powercap-info command	2022-11-30 16:48:28 -07:00
powercap-info.c	cpupower: Introduce powercap intel-rapl library and powercap-info command	2022-11-30 16:48:28 -07:00
version-gen.sh	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00