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Diffstat (limited to '0025-ZEN-INTERACTIVE-Tune-ondemand-governor-for-interacti.patch')
| -rw-r--r-- | 0025-ZEN-INTERACTIVE-Tune-ondemand-governor-for-interacti.patch | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/0025-ZEN-INTERACTIVE-Tune-ondemand-governor-for-interacti.patch b/0025-ZEN-INTERACTIVE-Tune-ondemand-governor-for-interacti.patch new file mode 100644 index 000000000000..62cb915ad4d5 --- /dev/null +++ b/0025-ZEN-INTERACTIVE-Tune-ondemand-governor-for-interacti.patch @@ -0,0 +1,97 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: "Jan Alexander Steffens (heftig)" <jan.steffens@gmail.com> +Date: Mon, 27 Jan 2020 18:27:16 +0100 +Subject: [PATCH] ZEN: INTERACTIVE: Tune ondemand governor for interactivity + +4.10: +During some personal testing with the Dolphin emulator, MuQSS has +serious problems scaling its frequencies causing poor performance where +boosting the CPU frequencies would have fixed them. Reducing the +up_threshold to 45 with MuQSS appears to fix the issue, letting the +introduction to "Star Wars: Rogue Leader" run at 100% speed versus about +80% on my test system. + +Also, lets refactor the definitions and include some indentation to help +the reader discern what the scope of all the macros are. + +5.4: +On the last custom kernel benchmark from Phoronix with Xanmod, Michael +configured all the kernels to run using ondemand instead of the kernel's +[default selection][1]. This reminded me that another option outside of +the kernels control is the user's choice to change the cpufreq governor, +for better or for worse. + +In Liquorix, performance is the default governor whether you're running +acpi-cpufreq or intel-pstate. I expect laptop users to install TLP or +LMT to control the power balance on their system, especially when +they're plugged in or on battery. However, it's pretty clear to me a +lot of people would choose ondemand over performance since it's not +obvious it has huge performance ramifications with MuQSS, and ondemand +otherwise is "good enough" for most people. + +Lets codify lower up thresholds for MuQSS to more closely synergize with +its aggressive thread migration behavior. This way when ondemand is +configured, you get sort of a "performance-lite" type of result but with +the power savings you expect when leaving the running system idle. + +[1]: https://www.phoronix.com/scan.php?page=article&item=xanmod-2020-kernel + +5.14: +Although CFS and similar schedulers (BMQ, PDS, and CacULE), reuse a lot +more of mainline scheduling and do a good job of pinning single threaded +tasks to their respective core, there's still applications that +confusingly run steady near 50% and benefit from going full speed or +turbo when they need to run (emulators for more recent consoles come to +mind). + +Drop the up threshold for all non-MuQSS schedulers from 80/95 to 55/60. + +5.15: +Remove MuQSS cpufreq configuration. +--- + drivers/cpufreq/cpufreq_ondemand.c | 8 +++++++- + init/Kconfig | 6 ++++++ + 2 files changed, 13 insertions(+), 1 deletion(-) + +diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c +index 6a41ea4729b8..b47804173462 100644 +--- a/drivers/cpufreq/cpufreq_ondemand.c ++++ b/drivers/cpufreq/cpufreq_ondemand.c +@@ -18,10 +18,16 @@ + #include "cpufreq_ondemand.h" + + /* On-demand governor macros */ ++#if defined(CONFIG_ZEN_INTERACTIVE) ++#define DEF_FREQUENCY_UP_THRESHOLD (55) ++#define MICRO_FREQUENCY_UP_THRESHOLD (60) ++#define DEF_SAMPLING_DOWN_FACTOR (5) ++#else + #define DEF_FREQUENCY_UP_THRESHOLD (80) ++#define MICRO_FREQUENCY_UP_THRESHOLD (95) + #define DEF_SAMPLING_DOWN_FACTOR (1) ++#endif + #define MAX_SAMPLING_DOWN_FACTOR (100000) +-#define MICRO_FREQUENCY_UP_THRESHOLD (95) + #define MICRO_FREQUENCY_MIN_SAMPLE_RATE (10000) + #define MIN_FREQUENCY_UP_THRESHOLD (1) + #define MAX_FREQUENCY_UP_THRESHOLD (100) +diff --git a/init/Kconfig b/init/Kconfig +index 79ed6a865a5b..3c2026636085 100644 +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -130,6 +130,12 @@ config ZEN_INTERACTIVE + Bandwidth slice size...........: 5 -> 3 ms + Task rebalancing threshold.....: 32 -> 64 + ++ --- CPUFreq Settings ----------------------------------- ++ ++ Ondemand sampling down factor..: 1 -> 5 ++ Ondemand default up threshold..: 80 -> 55 ++ Ondemand micro up threshold....: 95 -> 60 ++ + config BROKEN + bool + +-- +2.35.1 + |